Who is this?
Core group:

Melvyn B. Davies

Anders Johansen
Ross Church

Bertram Bitsch (Senior research fellow)
Alex Mustill (Senior research fellow)
Chao-Chin Yang (Postdoctoral fellow)

Alexey Bobrick (PhD student)
Daniel Carrera (PhD student)
Chen Fanyao (PhD student)
Kalle Jansson (PhD student)
Timmi Jorgensen (PhD student)
Giorgi Kokaia (PhD student)
Simona Pirani (PhD student)
Katrin Ros (PhD student)
Noemi Schaffer (PhD student)
Matthaus Schulik (PhD student)

International
Collaborators:


Yann Alibert
Philip Armitage
Matthew Bate
Willy Benz
Ian Bonnell
Jim Dale
Gerry Gilmore
Bengt Gustafsson
Douglas Heggie
Chunglee Kim
Andrew King
Thijs Kouwenhoven
Andrew Levan
Chris Lintott
Dougal Mackey
Lucio Mayer
Michael Meyer
Cole Miller
Richard Parker
Giampaolo Piotto
Philipp Podsiadlowski
Serena Repetto
Ken Rice
Hans Rickman
Felix Ryde
Steinn Sigurdsson
Nail Tanvir
Chris Tout
Dimitri Veras
Mark Wilkinson

Other Lund researchers
working in connected
areas:


Sofia Feltzing
David Hobbs
Lennart Lindegren
Nils Ryde
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Theoretical Astrophysics in Lund

Stellar clusters are widespread. Globular clusters contain some of the oldest stars, whilst the youngest stars are found in OB associations or in other clusters associated with recent star formation. Such crowded places are hostile environments: a large fraction of stars will collide or undergo close encounters. Wide binaries are likely to be broken up, whilst tighter ones will suffer major pertubations and possibly collisions from passing stars. A major part of our work is the study of such encounters using hydrodynamical computer simulations and using the results of such work to understand how collisions and close encounters will affect the evolution of stellar clusters and produce the myriad of stellar exotica seen such as X-ray binaries, millisecond pulsars, and gamma-ray burst progenitors. The cluster of stars at the centre of a galaxy may provide the material to form a massive black hole and fuel it as a quasar. Encounters in young clusters will affect planetary systems. Systems resembling our own solar system may be perturbed by fly-by encounters or a stellar binary companion, producing systems more similar to the observed exoplanet systems where jupiter-mass planets are on tight, eccentric orbits.

Our research can be summarised by three key questions:

  • How common are planetary systems which contain habitable worlds?

  • How do black holes form, grow and interact with their surroundings?

  • What powers the most-energetic explosions in the universe?

Our current work is addressing the following questions:
  • How do rocky planets form in dusty disks?

  • How and when do gas-giant planets form?

  • Can planetary systems survive in stellar clusters?

  • Which planetary systems suffer dynamical instability and what happens to them?

  • What part do nuclear stellar clusters play in the formation and subsequent growth of massive black holes in galactic nuclei?

  • How frequently are compact binaries produced in stellar clusters?

  • What happens to stars and planets in young, gas-rich stellar clusters?

  • What are the progenitors of the calcium-rich transients seen with PTF and how do they relate to gamma-ray bursts?



Lund Observatory, Box 43, SE-221 00 Lund, Sweden
Visiting address: Sölvegatan 27
Phone: +46 46 22 27300, Fax: +46 46 22 24614
Publisher: Melvyn Davies
E-mail: webmaster@astro.lu.se
Last updated: 2016 August 4