Splinter Meeting Stars
Stars and Stellar Feedback
Time: Tuesday September 14, 09:00-11:00
and Wednesday September 15, 09:00-11:00
and 16:15-18:00
and Thursday September 16, 09:00-11:00
CEST (UTC+2)
Room: virtual Stars
Convenor(s): Varsha Ramachandran [1],
Kathryn Kreckel [2],
Stefanie Walch-Gassner [3],
Ralf Klessen [4],
Andreas Sander [5],
Helge Todt [1]
[1] U Potsdam,
[2] ARI/ZAH,
[3] U Köln,
[4] ITA/ZAH,
[5] Armagh Observatory
Understanding the interplay between stars and gas is of fundamental importance across many fields of astrophysics. Stars interact with their surrounding interstellar medium (ISM) through ionizing radiation, stellar winds, and supernovae (SNe), depositing energy, momentum, mass, and metals. Subsequently, stellar feedback drives the evolution of the parental cloud and regulates the formation of new stars. The processes of star formation and feedback happen at cloud scales within galaxies, but they also play a critical role in galaxy evolution. The stellar feedback is necessary for forming realistic galaxies in simulations and to account for observed galaxy properties such as inefficient star formation, the life-cycle of giant molecular clouds, and turbulence in the ISM.
Among stars, the massive ones are the dominant feedback agents and dynamically shape the ISM on timescales of a few million years. Strong UV photons from massive stars create H II regions and photodissociation regions. Their winds and final core-collapse explosions are important sources of mechanical power, causing ISM turbulence and the formation of shells and bubbles. The combined impact of different feedback mechanisms in massive young stellar clusters leads to the formation of superbubbles that can drive galactic winds and outflows, which have been frequently observed in local as well as distant galaxies. A comparison of the energy, momentum, and metal contribution from stellar populations to the dynamics, chemistry, and morphology of the ISM is necessary to understand this cyclic process. Our goal is to bring together scientific communities who study stars, stellar populations, and their impact on the multi-phase ISM to address and discuss stellar feedback and star formation.
New generation instruments and large surveys (Gaia, MUSE, 4MOST, SDSS-V/MWM and LVM) give rise to multi-wavelength studies of resolved stellar populations and trace the detailed structure of the ISM. On the theoretical side, higher-resolution and more realistic numerical simulations of ISM and galaxy evolution allow us to study star formation and stellar feedback in detail. This splinter meeting will include recent theoretical and observational results and contribute to our current understanding of why and how stars affect their environment, the importance of different feedback processes, how feedback varies with different ISM conditions, and the impact on star formation.
Program
Tuesday September 14, 09:00-11:00
Stars and Stellar Feedback (virtual Stars)
Wednesday September 15, 09:00-11:00
Stars and Stellar Feedback (virtual Stars)
Wednesday September 15, 16:15-18:00
Stars and Stellar Feedback (virtual Stars)
Thursday September 16, 09:00-11:00
Stars and Stellar Feedback (virtual Stars)
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