Lund Observatory

department of Astronomy and Theoretical Physics

Seminars at Lund Observatory

Astronomy seminars are given in English. They are open to all, but aimed at an audience with basic knowledge in astrophysics. Unless otherwise noted, seminars take place on Thursdays 14:15 in Lundmarksalen.

Spring 2018

2018-01-18/19

PhD seminars

2018-01-25 Mirek Giersz
Warsaw
Black holes in stellar clusters
2018-02-01 Jayne Birkby
Amsterdam
New frontiers in exoplanet characterisation
Exoplanet characterization is undergoing a rapid evolution, especially in the study of exoplanet atmospheres. I will discuss the very latest results from both space and ground-based observations and highlight how they are helping us to understand exoplanet origins and diversity. I will focus part of my talk on high-resolution spectroscopy, which is a robust and powerful tool in exoplanet characterization. It uses changes in the Doppler shift of a planet to disentangle its spectrum from the glare of its host star. The technique is sensitive to the depth, shape, and position of a planet’s spectral lines, and thus reveals information about the planet’s composition, atmospheric structure, mass, global wind patterns, and rotation. I will present MEASURE: the MMT Exoplanet Atmosphere SURvEy. This 40 night survey is the largest high-resolution study of exoplanet atmospheres to date. It contains spectra of exoplanets from hot Jupiters to warm Neptunes, both transiting and non-transiting, observing both their dayside and nightside thermal emission. I will describe the survey and present some of its exciting preliminary results. The survey not only enables a homogenous dataset to perform comparative exoplanetology, but provides complementary high-resolution spectra for exoplanets observed with HST and Spitzer. The combination of high- and low-resolution spectroscopy can provide stringent constraints on planet metallicity and C/O ratios, and signifies the next step in the detailed characterization of exoplanet atmospheres.
2018-02-05/06

The Dynamical Universe for ALL

2018-02-08 Beibei Liu
Amsterdam/Lund
Magnetospheric rebound: a mechanism to re-arrange the orbits of super-Earth planets
2018-02-15 Ariel Goobar
Stockholm
Cosmic transparency and the dimming of standard candles
Accurate accounting for the dimming of light along the line of sight for distant sources is of great importance in astronomy. Furthermore, it is an essential step in the measurements of cosmological distances used to probe the cosmic composition. In spite of the great success in the last two decades in the use of Type Ia supernovae to measure the properties of the accelerating universe, understanding the wavelength dependence of the extinction in the supernova host galaxies has remained elusive. I will explain why this has been a puzzle and present a possible solution. A measurement of the transparency of the intergalactic medium will be discussed
2018-02-22 Marie Martig
Liverpool John Moores University
The structure of galactic thick disks
2018-02-28
ATP talk
Wed. 15:15
Johanna Larsson
Dept. of Astronomy and Theoretical Physics
Physics pedagogy
2018-03-02

COMPUTE Winter meeting

2018-03-08 Fabio Antonini
Nuclear clusters and (supermassive) black holes
2018-03-14
ATP talk
Wed. 15:15
Johan Thoren
Dept. of Astronomy and Theoretical Physics
2018-03-15 Hiranya Peiris
Stockholm
2018-03-22
PhD defence
Asli Pehlivan Rhodin
Dept. of Astronomy and Theoretical Physics
2018-03-26
Mon. 14:15
Martin Turbet
Paris
Numerical Climate Models
2018-04-12

Bayes Day meeting

2018-05-08
Tue. 14:15
Alice Quillen
Rochester
Astro-viscoelastodynamics
2018-05-16
ATP talk
Wed. 15:15
Najmeh Abiri
Dept. of Astronomy and Theoretical Physics
2018-05-17

Kallen symposium: Exoplanets towards the future

2018-05-21/22

Masters talks

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