16-20 September 2019
University of Stuttgart, Campus Vaihingen
Europe/Berlin timezone

New Challenges in Stellar Spectroscopy

 

Time:
Tuesday, September 17, 14:00-18:30
Wednesday, September 18, 14:00-18:30

Room: 9.12

Organizers:
Stephan Geier (AIP, Potsdam)
Helge Todt (AIP, Potsdam)
Maria Bergemann (MPIA, Heidelberg)

Accurate determination of the parameters of stars is of fundamental importance for many fields of astrophysics such as exoplanets, Galactic structure, and cosmology. The quantitative analysis of stellar spectra has a long history in Germany. Especially in the last decade, a significant progress has been made thanks to advanced theoretical model atmospheres for cool and hot stars, the availability of excellent spectroscopic data from X-ray to infrared, improved atomic and molecular data, and the increase in computing power.

Large spectroscopic, astrometric and photometric stellar surveys such as 4MOST, Gaia or LSST, are revolutionising the field. However, these crucial developments in observational astronomy pose major challenges for the application of the sophisticated theoretical methods to the data. Processing and analysing millions of stellar spectra calls for automated approaches with large model grids and systematic uncertainties due to unavoidable simplifications need to be properly assessed. Besides, these large-scale stellar surveys expose a new kind of challenge — the enormous diversity of stellar objects in the Milky Way and beyond. Peculiar and interesting objects discovered in the new wealth of data, such as very metal-poor stars, red supergiants, or compact remnants of failed thermonuclear supernovae, require tailor-made models and individual analyses.

In connection to that several problems need to be addressed: How can accurate distances and multi-band photometry be combined with spectroscopic analyses in a most efficient way? What are the synergies between spectroscopy and the emerging field of asteroseismology? How do new stellar structure models compare with parameters derived by combining model atmospheres and observations? And finally, how can we best exchange and publish our data, models and codes to make them available for the next generation of researchers in the field?

In this splinter session we aim at gathering the stellar community to present most recent results both in observation and theory. While the focus will be on stellar spectroscopy, alternative methods of quantitative analyses of stars will be discussed as well.

Please, check also the external website of the meeting:
http://www.astro.physik.uni-potsdam.de/~htodt/ag2019/

 

Agenda is available under the following link:

http://www.astro.physik.uni-potsdam.de/~htodt/ag2019/

 

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