Nils Ryde
Professor
I am Office director for Astrophysics and Topic Responsible for Astronomy and Astrophysics at Lund Universtiy.
My field of research is stellar spectroscopy. My main interests deal with the origin of the inner bulge of the Milky Way and the Galactic Center regions. This is performed by investigating stars at high spectral resolution in the near-IR. A red thread through my research projects have been spectroscopy at high resolution with special emphasis on the opportunities that come with cutting-edge IR spectrometers.
Research Areas
Galactic Chemical Evolution
- Assembly history of the Nuclear Star Cluster with KECK/NIRSPEC and Gemini/IGRINS, see media Keck Observatory and at IFL Science!
- Origin of the inner Galactic bulge, |b| < 3 degrees with VLT/CRIRES/ISAAC/UVES, NTT/SOFI, Lowell/IGRINS and KECK/NIRSPEC
- Chemical evolution of fluorine, sulfur, and carbon in the Milky Way with VLT/CRIRES/UVES and Lowell/IGRINS, see e.g. Colgate's homepage.
Stellar atmospheres, investigated by means of infrared spectroscopy
- Water vapor in the atmospheres of Red Giants with Gemini/TEXES, SOFIA/EXES
- The Mg I lines emission at 12 microns, Gemini/TEXES
- Outer atmospheres and winds of red giant star with SOFIA/EXES, Gemini/Phoenix, ISO/SWS/LWS
Development of Infrared Spectroscopy with the help of laboratory measurements
- Near-IR Atomic and Molecular Spectroscopy in the Laboratory with the Edlén laboratory
- IR spectroscopy at high spectral resolution for the E-ELT
Career History
- Office director, Astrophysics, Lund University, 2023 -
- Unit head (Enhetschef) for Astronomy at Lund University, 2022
- Professor in Astronomy at Lund Universtiy, 2021-
- Topic Responsible (Ämnesansvarig) for Astronomy och Astrophysics at Lund University, 2020-
- Invited Guest Professor, Observatoire de la Côte d’Azur, Nice, 2019
- ETP (Excellent Teacher Practitioner), Lund University, 2012
- Universitetslektor in Astronomy, 2010-2021
- Royal Swedish Academy of Sciences Research Fellow, 2008-2012
- Appointed Associate at the European Southern Observatory (ESO), Instrumentation Division, Garching bei München, 2007
- Docent in Astronomy with spec. in Astrophysics, Uppsala Universtiy, 2005
- Chercheur associé at GRAAL, Universite Montpellier 2, Autumn 2004, CNRS
- Research Associate in Astrophysics, Uppsala Universtiy, 2003-2007, Swedish Research Council (VR)
- Postdoctoral Fellow, University of Texas at Austin, 2001-2002, STINT
- Postdoctoral Fellow, Uppsala University, 2000, Swedish National Space Board
- Teknologie doktor (Ph.D.) in Astrophysics, 2000, Uppsala Universtiy; (supervisors: Bengt Gustafsson and Kjell Eriksson)
- Civ. ing. in Engineering Physics (212 p), 1994, Lund Institute of Technology
- Sergeant in the Swedish Royal Airforce
- Curriculum Vitae (PDF)
Publications
Displaying of publications. Sorted by year, then title.
M giants with IGRINS : III. Abundance trends for 21 elements in the solar neighborhood from high-resolution near-infrared spectra
G. Nandakumar, N. Ryde, R. Forsberg, M. Montelius, G. Mace, et al.
(2024) Astronomy and Astrophysics, 684
Journal articleM giants with IGRINS : III. Abundance trends for 21 elements in the solar neighborhood from high-resolution near-infrared spectra
G. Nandakumar, N. Ryde, R. Forsberg, M. Montelius, G. Mace, et al.
(2024) Astronomy & Astrophysics, 684
Journal articleComposition of Giants 1° North of the Galactic Center : Detailed Abundance Trends for 21 Elements Observed with IGRINS
Govind Nandakumar, Nils Ryde, Gregory Mace, Kyle F. Kaplan, Niels Nieuwmunster, et al.
(2024) Astrophysical Journal, 964
Journal articleA Wide Metallicity Range for Gyr-old Stars in the Nuclear Star Cluster
B. Thorsbro, R. Forsberg, G. Kordopatis, A. Mastrobuono-Battisti, R. P. Church, et al.
(2023) Astrophysical Journal Letters, 1
Journal articleM giants with IGRINS : II. Chemical evolution of fluorine at high metallicities
G. Nandakumar, N. Ryde, G. Mace
(2023) Astronomy and Astrophysics, 676
Journal articleDetailed α abundance trends in the inner Galactic bulge
N. Nieuwmunster, G. Nandakumar, E. Spitoni, N. Ryde, M. Schultheis, et al.
(2023) Astronomy and Astrophysics, 671
Journal articleFirst r -process enhanced star confirmed as a member of the Galactic bulge
R. Forsberg, R. M. Rich, N. Nieuwmunster, H. Jönsson, M. Schultheis, et al.
(2023) Astronomy and Astrophysics, 669
Journal articleM giants with IGRINS : I. Stellar parameters and α -abundance trends of the solar neighborhood population
G. Nandakumar, N. Ryde, L. Casagrande, G. Mace
(2023) Astronomy and Astrophysics, 675
Journal articleThe Galactic chemical evolution of phosphorus observed with IGRINS
G. Nandakumar, N. Ryde, M. Montelius, B. Thorsbro, H. Jönsson, et al.
(2022) Astronomy and Astrophysics, 668
Journal articleChemical evolution of ytterbium in the Galactic disk*
M. Montelius, R. Forsberg, N. Ryde, H. Jönsson, M. Afşar, et al.
(2022) Astronomy and Astrophysics, 665
Journal articleCO line observations of OH/IR stars in the inner Galactic Bulge : Characteristics of stars at the tip of the AGB
H. Olofsson, T. Khouri, B. A. Sargent, A. Winnberg, J. A.D.L. Blommaert, et al.
(2022) Astronomy and Astrophysics, 665
Journal articleThe Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
S. Randich, Thomas Bensby, Sofia Feltzing, Diane Feuillet, Nils Ryde, et al.
(2022) Astronomy & Astrophysics, 666
Journal articleObserving early stellar nucleosynthesis
Nils Ryde, Graham Harper
(2021) Nature Astronomy, 5 p.1212-1213
Journal article (comment)Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members : III. Constraints from a subgiant
K. Brogaard, F. Grundahl, E. L. Sandquist, D. Slumstrup, M. L. Jensen, et al.
(2021) Astronomy and Astrophysics, 649
Journal articleAtomic data for the Gaia-ESO Survey
U. Heiter, K. Lind, M. Bergemann, M. Asplund, Š. Mikolaitis, et al.
(2021) Astronomy and Astrophysics, 645
Journal articleVINTERGATAN III: how to reset the metallicity of the Milky Way
Florent Renaud, Oscar Agertz, Eric Andersson, Justin I. Read, Nils Ryde, et al.
(2021) Monthly Notices of the Royal Astronomical Society, 503
Journal articleVINTERGATAN - II. The history of the Milky Way told by its mergers
Florent Renaud, Oscar Agertz, Justin I. Read, Nils Ryde, Eric Andersson, et al.
(2021) Monthly Notices of the Royal Astronomical Society, 503
Journal articleVintergatan - i. The origins of chemically, kinematically, and structurally distinct discs in a simulated milky way-mass galaxy
Oscar Agertz, Florent Renaud, Sofia Feltzing, Justin I. Read, Nils Ryde, et al.
(2021) Monthly Notices of the Royal Astronomical Society, 503 p.5826-5845
Journal articleFluorine in the Solar Neighborhood : The Need for Several Cosmic Sources
Nils Ryde, Henrik Jönsson, Gregory Mace, Katia Cunha, Emanuele Spitoni, et al.
(2020) Astrophysical Journal, 893
Journal articleSofia-exes observations of betelgeuse during the great dimming of 2019/2020
Graham M. Harper, Curtis N. Dewitt, Matthew J. Richter, Edward F. Guinan, Richard Wasatonic, et al.
(2020) Astrophysical Journal Letters, 893
Journal articleModelling the chemical evolution of Zr, La, Ce, and Eu in the Galactic discs and bulge
V. Grisoni, G. Cescutti, F. Matteucci, R. Forsberg, H. Jönsson, et al.
(2020) Monthly Notices of the Royal Astronomical Society, 492 p.2828-2834
Journal articleOn the cosmic origin of fluorine
Nils Ryde
(2020) Journal of Astrophysics and Astronomy, 41
Journal articleFluorine in the solar neighbourhood : Modelling the Galactic thick and thin discs
V. Grisoni, D. Romano, E. Spitoni, F. Matteucci, N. Ryde, et al.
(2020) Monthly Notices of the Royal Astronomical Society, 498 p.1252-1258
Journal articleDetailed Abundances in the Galactic Center : Evidence of a Metal-rich Alpha-enhanced Stellar Population
B. Thorsbro, N. Ryde, R. M. Rich, M. Schultheis, F. Renaud, et al.
(2020) Astrophysical Journal, 894
Journal articleALMA and VLA reveal the lukewarm chromospheres of the nearby red supergiants Antares and Betelgeuse
E. O'Gorman, G. M. Harper, K. Ohnaka, A. Feeney-Johansson, K. Wilkeneit-Braun, et al.
(2020) Astronomy and Astrophysics, 638
Journal articleThe Photospheric Temperatures of Betelgeuse during the Great Dimming of 2019/2020 : No New Dust Required
Graham M. Harper, Edward F. Guinan, Richard Wasatonic, Nils Ryde
(2020) Astrophysical Journal, 905
Journal articleStellar population astrophysics (SPA) with the TNG : Identification of a sulphur line at λair = 1063.6 nm in GIANO-B stellar spectra
N. Ryde, Henrik Hartman, E. Oliva, L. Origlia, N. Sanna, et al.
(2019) Astronomy and Astrophysics, 631
Journal articleAbundances of disk and bulge giants from high-resolution optical spectra : IV. Zr, La, Ce, Eu
R. Forsberg, H. Jönsson, N. Ryde, F. Matteucci
(2019) Astronomy & Astrophysics, 631
Journal articleThe inner two degrees of the Milky Way : Evidence of a chemical difference between the Galactic Center and the surrounding inner bulge stellar populations
M. Schultheis, R. M. Rich, L. Origlia, N. Ryde, G. Nandakumar, et al.
(2019) Astronomy and Astrophysics, 627
Journal articleThe origin of stellar populations in the Galactic bulge from chemical abundances
F. Matteucci, V. Grisoni, E. Spitoni, A. Zulianello, A. Rojas-Arriagada, et al.
(2019) Monthly Notices of the Royal Astronomical Society, 487 p.5363-5371
Journal articleAbundances of disk and bulge giants from high-resolution optical spectra : III. Sc, V, Cr, Mn, Co, Ni
M. Lomaeva, H. Jönsson, N. Ryde, M. Schultheis, B. Thorsbro
(2019) Astronomy and Astrophysics, 625
Journal article4MOST Consortium Survey 4: Milky Way Disc and Bulge High-Resolution Survey (4MIDABLE-HR)
T. Bensby, M. Bergemann, J. Rybizki, B. Lemasle, L. Howes, et al.
(2019) Messenger, 175 p.35-38
Journal article4MOST Consortium Survey 3: Milky Way Disc and Bulge Low-Resolution Survey (4MIDABLE-LR)
C. Chiappini, I. Minchev, E. Starkenburg, F. Anders, N.~G. Fusillo, et al.
(2019) The Messenger, 175 p.30-34
Journal article4MOST: Project overview and information for the First Call for Proposals
O. Agertz, A.~A. Berbel, J. Aird, A. Amarsi, F. Anders, et al.
(2019) The Messenger, 175 p.3-11
Journal articleSystematic investigation of chemical abundances derived using IR spectra obtained with GIANO
E. Caffau, P. Bonifacio, E. Oliva, S. Korotin, L. Capitanio, et al.
(2019) Astronomy and Astrophysics, 622
Journal articleFluorine Abundances in the Galactic Disk
Rafael Guerço, Katia Cunha, Verne V. Smith, Christian R. Hayes, Carlos Abia, et al.
(2019) Astrophysical Journal, 885
Journal articleThe blue straggler V106 in NGC6791 : A prototype progenitor of old single giants masquerading as young
K. Brogaard, S. M. Christiansen, F. Grundahl, A. Miglio, R. G. Izzard, et al.
(2018) Monthly Notices of the Royal Astronomical Society, 481 p.5062-5072
Journal articleChemical characterization of the inner Galactic bulge : North-South symmetry
G. Nandakumar, N. Ryde, M. Schultheis, B. Thorsbro, H. Jönsson, et al.
(2018) Monthly Notices of the Royal Astronomical Society, 478 p.4374-4389
Journal articleFluorine in the solar neighborhood : Chemical evolution models
E. Spitoni, F. Matteucci, H. Jönsson, N. Ryde, D. Romano
(2018) Astronomy and Astrophysics, 612
Journal articleNear-infrared spectroscopic observations of massive young stellar object candidates in the central molecular zone
G. Nandakumar, M. Schultheis, A. Feldmeier-Krause, R. Schödel, N. Neumayer, et al.
(2018) Astronomy and Astrophysics, 609
Journal articleEvidence against Anomalous Compositions for Giants in the Galactic Nuclear Star Cluster
B. Thorsbro, N. Ryde, M. Schultheis, H. Hartman, R. M. Rich, et al.
(2018) Astrophysical Journal, 866
Journal articleDetailed abundances for the old population near the galactic center. I. Metallicity distribution of the nuclear star cluster
R. M. Rich, N. Ryde, B. Thorsbro, T. K. Fritz, M. Schultheis, et al.
(2017) The Astronomical Journal, 154
Journal articleSOFIA-EXES Mid-IR Observations of [Fe II] Emission from the Extended Atmosphere of Betelgeuse
G. M. Harper, C. N. DeWitt, M. J. Richter, T. K. Greathouse, N. Ryde, et al.
(2017) Astrophysical Journal, 836
Journal articleAbundances of disk and bulge giants from high-resolution optical spectra : I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples
H. Jönsson, N. Ryde, T. Nordlander, Asli Pehlivan, H. Hartman, et al.
(2017) Astronomy and Astrophysics, 598
Journal articleAbundances of disk and bulge giants from high-resolution optical spectra : II. O, Mg, Co, and Ti in the bulge sample
H. Jönsson, N. Ryde, M. Schultheis, M. Zoccali
(2017) Astronomy and Astrophysics, 598
Journal articleFluorine in the Solar neighborhood : No evidence for the neutrino process
H. Jönsson, N. Ryde, E. Spitoni, F. Matteucci, K. Cunha, et al.
(2017) Astrophysical Journal, 835
Journal articleThe Cosmic Origin of Fluorine : An Astronomer's View on Fluorine Synthesis
H. Jönsson, N. Ryde
(2017) Modern Synthesis Processes and Reactivity of Fluorinated Compounds: Progress in Fluorine Science , p.1-6
Book chapterDetailed near-IR stellar abundances of red giants in the Inner Bulge and Galactic Center
N. Ryde, R. M. Rich, B. Thorsbro, M. Schultheis, T. K. Fritz, et al.
(2017) Proceedings of the International Astronomical Union, 13 p.82-85
Journal articleDETAILED ABUNDANCE ANALYSIS of A METAL-POOR GIANT in the GALACTIC CENTER
N. Ryde, T. K. Fritz, R. M. Rich, B. Thorsbro, M. Schultheis, et al.
(2016) Astrophysical Journal, 831
Journal articleTemperatures and metallicities of M giants in the Galactic bulge from low-resolution K -band spectra
M. Schultheis, N. Ryde, G. Nandakumar
(2016) Astronomy and Astrophysics, 590
Journal articleA map of D/H on Mars in the thermal infrared using EXES aboard SOFIA
T. Encrenaz, C. Dewitt, M. J. Richter, T. K. Greathouse, T. Fouchet, et al.
(2016) Astronomy and Astrophysics, 586
Journal articleChemical Evolution of the Inner 2 Degrees of the Milky Way Bulge: [α/Fe] Trends and Metallicity Gradients
Nils Ryde, M. Schultheis, V. Grieco, F. Matteucci, R. M. Rich, et al.
(2016) The Astronomical Journal, 151
Journal articleHYPERFINE-DEPENDENT gf -VALUES OF Mn i LINES IN THE 1.49–1.80 μm H BAND
Martin Andersson, Jon Grumer, Nils Ryde, Richard Blackwell-Whitehead, R Hutton, et al.
(2015) The Astrophysical Journal Supplement Series, 216
Journal articleKinematics and chemistry of recently discovered Reticulum 2 and Horologium 1 dwarf galaxies
Sergey E. Koposov, Andrew R. Casey, Vasily Belokurov, James R. Lewis, Gerard Gilmore, et al.
(2015) Astrophysical Journal, 811
Journal articleThe Gaia-ESO Survey: A globular cluster escapee in the Galactic halo
K. Lind, S. E. Koposov, Chiara Battistini, A. F. Marino, Gregory Ruchti, et al.
(2015) Astronomy & Astrophysics, 575
Journal articleSystematic trend of water vapour absorption in red giant atmospheres revealed by high resolution TEXES 12 mu m spectra
Nils Ryde, Julien Lambert, M. Farzone, M. J. Richter, E. Josselin, et al.
(2015) Astronomy & Astrophysics, 573
Journal articleA new nonlocal thermodynamical equilibrium radiative transfer method for cool stars Method and numerical implementation
Julien Lambert, E. Josselin, Nils Ryde, A. Faure
(2015) Astronomy & Astrophysics, 580
Journal articleUnderstanding AGB evolution in Galactic bulge stars from high-resolution infrared spectroscopy
S. Uttenthaler, J. A. D. L. Blommaert, P. R. Wood, T. Lebzelter, B. Aringer, et al.
(2015) Monthly Notices of the Royal Astronomical Society, 451 p.1750-1769
Journal articleSOFIA/EXES observations of water absorption in the protostar AFGL 2591 at high spectral resolution
Nick Indriolo, D. A. Neufeld, C. N. DeWitt, M. J. Richter, A. C. A. Boogert, et al.
(2015) Astrophysical Journal Letters, 802
Journal articleChemical evolution of the Galactic Centre
V. Grieco, F. Matteucci, Nils Ryde, M. Schultheis, S. Uttenthaler
(2015) Monthly Notices of the Royal Astronomical Society, 450 p.2094-2103
Journal articleChemical abundances of M giants in the Galactic centre: A single metal-rich population with low [alpha/Fe]
Nils Ryde, M. Schultheis
(2015) Astronomy & Astrophysics, 573
Journal articleIs sulphur a typical alpha element?
Nils Ryde, Henrik Jönsson, Elvijs Matrozis
(2014) Memorie della Societa Astronomica Italiana, 85 p.269-271
Journal articleChemical evolution of fluorine in the bulge High-resolution K-band spectra of giants in three fields
Henrik Jönsson, Nils Ryde, G. M. Harper, K. Cunha, M. Schultheis, et al.
(2014) Astronomy & Astrophysics, 564
Journal articleThe Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann, A. Frasca, L. Magrini, et al.
(2014) Astronomy & Astrophysics, 570
Journal articleFluorine in the Solar Neighborhood: Is It All Produced in Asymptotic Giant Branch Stars?
Henrik Jönsson, Nils Ryde, G. M. Harper, M. J. Richter, K. H. Hinkle
(2014) Astrophysical Journal Letters, 789
Journal articleMOONS: the Multi-Object Optical and Near-infrared Spectrograph for the VLT
M. Cirasuolo, J. Afonso, M. Caro, H. Flores, R. Maiolino, et al.
(2014) Ground-based and Airborne Instrumentation for Astronomy V, 9147 p.91470-91470
Conference paperThe Gaia-ESO Survey: radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk
M. Bergemann, Gregory Ruchti, A. Serenelli, Sofia Feltzing, A. Alves-Brito, et al.
(2014) Astronomy & Astrophysics, 565
Journal articleGalactic chemical evolution of sulphur Sulphur abundances from the [SI] lambda 1082 nm line in giants
E. Matrozis, Nils Ryde, A. K. Dupree
(2013) Astronomy & Astrophysics, 559
Journal articleWhat is the origin of the water vapour signatures in red giant stars?
M. Farzone, N. Ryde, G. M. Harper, J. Lambert, E. Josselin, et al.
(2013) EAS Publications Series, 60 p.155-159
Conference paperThe very low mass multiple system LHS 1070. A testbed for model atmospheres for the lower end of the main sequence
A. S. Rajpurohit, C. Reyle, M. Schultheis, Ch. Leinert, F. Allard, et al.
(2012) Astronomy & Astrophysics, 545
Journal articleSulphur abundances in halo giants from the [S I] line at 1082 nm and the [S I] triplet around 1045 nm
Henrik Jönsson, Nils Ryde, P. E. Nissen, R. Collet, K. Eriksson, et al.
(2011) Astronomy & Astrophysics, 530
Journal articleLumen Accipe et Imperti - Föreläsning och motivation
Nils Ryde, Felix Ryde, Tanja Nymark
(2011) Lednings- och kompetensutbildning/CED , p.24-30
Conference paperProspects of stellar abundance studies from near-IR spectra observed with the E-ELT
Nils Ryde
(2010) Astronomical Notes - Astronomische Nachrichten, 331 p.433-448
Journal articleChemical abundances for 11 bulge stars from high-resolution, near-IR spectra
Nils Ryde, B. Gustafsson, B. Edvardsson, et al.
(2010) Astronomy and Astrophysics, 509 p.20-20
Journal articleCNO abundances in the Galactic bulge
Nils Ryde
(2010) Proceedings of the International Astronomical Union, 265 p.285-288
Conference paperChemical abundances of 11 bulge stars from high-resolution, near-IR spectra
Nils Ryde, B. Gustafsson, B. Edvardsson, J. Melendez, A. Alves-Brito, et al.
(2010) Astronomy & Astrophysics, 509
Journal articleAbundances in bulge stars from high-resolution, near-IR spectra I. The CNO elements observed during the science verification of CRIRES at VLT
Nils Ryde, B. Edvardsson, B. Gustafsson, K. Eriksson, H. U. Kauefl, et al.
(2009) Astronomy & Astrophysics, 496 p.141-701
Journal articleRed supergiants as potential Type IIn supernova progenitors: Spatially Resolved 4.6 Mum CO Emission Around VY CMa and Betelgeuse
Nathan Smith, Kenneth H. Hinkle, Nils Ryde
(2009) The Astronomical Journal, 137 p.3558-3573
Journal article reviewMagnetic fields in M dwarf stars from high-resolution infrared spectra
O. Kochukhov, U. Heiter, N. Piskunov, Nils Ryde, B. Gustafsson, et al.
(2009) AIP Conference Proceedings, 1094 p.124-129
Conference paperUV, IR, and mm studies of CO surrounding the red supergiant α Orionis (M2 Iab)
G.M. Harper, K.G. Carpenter, Nils Ryde, N. Smith, J. Brown, et al.
(2009) AIP Conference Proceedings, 1094 p.868-871
Conference paperStellar spectroscopy in the infrared at high spectral resolution
Nils Ryde
(2009) Physica Scipta, T134 p.014001-014001
Conference paperUnveiling the Secrets of the Galactic bulge through stellar abundances in the near-IR: a VLT/Crires project
Nils Ryde
(2009) IAU Symposium Proceedings, 254 p.159-164
Conference paperTEXES observations of M supergiants: dynamics and thermodynamics of wind acceleration
Graham M. Harper, Matthew J. Richter, Nils Ryde, Alexander Brown, Joanna Brown, et al.
(2009) Astrophysical Journal, 701 p.1464-1483
Journal articleMg I emission lines at 12 and 18 mu m in K giants
J. O. Sundqvist, Nils Ryde, G. M. Harper, A. Kruger, M. J. Richter
(2008) Astronomy & Astrophysics, 486 p.985-993
Journal articleProbing the mass-loss history of the unusual Mira variable R Hya through its infrared CO wind
L Decin, L Blomme, M Reyniers, Nils Ryde, K H Hinkle
(2008) Astronomy & Astrophysics, 484 p.55-401
Journal articleThe Galactic bulge: the VLT/Crires perspective
Nils Ryde
(2008) Physica Scripta, T133 p.014033-014033
Conference paperThe Determination of Stellar Parameters of Giants in the Galactic Disks and Bulge
Joakim Byström, Nils Ryde, Sofia Feltzing, Johan Holmberg, Thomas Bensby
(2007) Proceedings of the International Astronomical Union, 241 p.235-236
Conference paperA First Study of Giant Stars in the Galactic Bulge based on Crires spectra
Nils Ryde, B. Edvardsson, B. Gustafsson, H.-U. Käufl
(2007) Proceedings of the International Astronomical Union, 241 p.260-261
Conference paperSulphur abundances in disk stars as determined from the forbidden 10821 Å[SI] line
Nils Ryde
(2006) Astronomy and Astrophysics Letters, 455 p.13-16
Journal article (letter)Water Vapor on Betelgeuse as Revealed by TEXES High-Resolution 12 micron m
Nils Ryde, G.M. Harper, M.J. Richter, T. Greathouse, J.H. Lacy
(2006) Astrophysical Journal, 637 p.1040-1055
Journal articleWater Vapor on My Cep
Nils Ryde, M.J. Richter, G.M. Harper, K. Eriksson, D.L. Lambert
(2006) Astrophysical Journal, 645 p.652-658
Journal articleCarbon stars in local group dwarf galaxies: C and O abundances
R. Wahlin, K. Eriksson, B. Gustafsson, K.H. Hinkle, Nils Ryde, et al.
(2006) Memorie della Societa Astronomica Italiana, 77 p.955-960
Journal articleSulphur abundances in metal-poor stars
A. Korn, Nils Ryde
(2005) Astronomy and Astrophysics, 443 p.1029-1032
Journal articleOn the Origin of Sulfur
Nils Ryde, D.L. Lambert
(2005) ASP Conference Proceedings, 336 p.355-355
Conference paperPhoenix Spectra of Carbon Stars in the LMC
R. Wallin, K. Eriksson, B. Gustafsson, K.L. Hinkle, D.L. Lambert, et al.
(2005) ESO Astrophysics Symposia , p.439-439
Conference paperThe Abundance of Elements in Cool Stars, as Determined from High-Resolution, 1-5 Micron Spectroscopy
Nils Ryde, B. Gustafsson, K. Eriksson, R. Wahlin
(2005) ESO Astrophysics Symposia , p.365-376
Conference paperInterpretations of Gamma-Ray Burst Spectroscopy II. Bright BATSE Burst
F. Ryde, D. Kocevski, Z. Bagoly, Nils Ryde, A. Mészáros
(2005) Astronomy and Astrophysics, 432 p.105-116
Journal articleNon-thermal emission of Mg I at 12 micron m from Procyon
Nils Ryde, M.J. Richter
(2004) Astrophysical Journal Letters, 611 p.41-43
Journal article (letter)The R Coronae Borealis stars: carbon abundances from forbidden C-lines
G. Pandey, D.L. Lambert, N.K. Rao, B. Gustafsson, Nils Ryde, et al.
(2004) Monthly Notices of the Royal Astronomical Society, 353 p.143-152
Journal articleThe Zeeman-sensitive emission lines of Mg I at 12 micron m in Procyon
Nils Ryde, A. Korn, M.J. Richter, F. Ryde
(2004) Astrophysical Journal, 617 p.551-558
Journal articleOn the galactic chemical evolution of sulfur
Nils Ryde, D.L. Lambert
(2004) Astronomy and Astrophysics, 415 p.559-569
Journal articleTEXES Observations of Betelgeuse: Dynamics and Thermodynamics of the Wind Acceleration Zone
G.M. Harper, A. Brown, M.J. Richter, S. Holmes, Nils Ryde
(2004) Bulletin of the American Astronomical Society, 36 p.1425-1425
Conference paper: abstractWhat does the Unexpected Detection of Water Vapor in Arcturus' Atmosphere Tell us?
Nils Ryde, D.L. Lambert, J.H. Lacy, M.J. Richter, T.K. Greathouse
(2003) ASP Conference Proceedings, 293 p.214-214
Conference paperDetection of Water Vapor in the Photosphere of Arcturus
Nils Ryde, D.L. Lambert, M.J. Richter, J.H. Lacy
(2002) Astrophysical Journal, 580 p.447-458
Journal articleWater in Arcturus' Atmosphere
Nils Ryde, D.L. Lambert, J.H. Lacy, M.J. Richter
(2002) Bulletin of the American Astronomical Society, 34 p.779-779
Conference paper: abstractThe 3 micron m spectrum of R Doradus observed with the ISO-SWS
Nils Ryde, K. Eriksson
(2002) Astronomy and Astrophysics, 386 p.874-883
Journal articleProbing the mass-loss history of carbon stars using CO line emission
F.L. Schöier, Nils Ryde, H. Olofsson
(2002) Astrophysical Journal, 580 p.447-458
Journal article