Ruprecht-Karls-Universität Heidelberg

Vorträge, Seminare, Ereignisse

A list of all Physics & Astronomy talks and seminars taking place in Heidelberg can be found at HePhySTO.


Upcoming events


2020-10-02
15:00
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Zooming in on star and disk formation
Asmita Bhandare (MPIA/CRAL)
Königstuhl Kolloquium ( Home pageHephysto link )
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Abstract
Magnetized, cold, dense molecular cloud cores provide the birth environment for stars and disks. The multi-scale scenario of low-mass star formation occurs via the formation of two quasi-hydrostatic cores. In this talk I will discuss results from numerical simulations used to probe the gravitational collapse process that involves the transition of an isolated molecular cloud core to a hydrostatic core with a surrounding disk. We use the PLUTO code to perform radiation (magneto-)hydrodynamic simulations using one- and two-dimensional (2D) grids. Additionally, we use for the gas equation of state density- and temperature-dependent thermodynamic quantities to account for dissociation, ionization, and molecular vibrations and rotations. Using spherically symmetric simulations we survey a wide range of initial low- to high-mass (0.5 - 100 Msun) molecular cloud cores, yielding the largest parameter scan so far. The results highlight that in the high-mass regime first hydrostatic cores do not have time to evolve because of the large accretion rates. We perform 2D collapse simulations with an unprecedented resolution to model the evolution of the second hydrostatic core. For the first time, these studies demonstrate the onset of convection within the second core for the collapse cases of non-rotating molecular cloud cores in the low-mass regime. This supports the interesting possibility that dynamo-driven magnetic fields may be generated during the very early phases of low-mass star formation. Furthermore, I will discuss the impact of different cloud properties on the formation of protostellar disks and the launching of magnetically driven outflows during the early stages of star formation. These models will serve as the foundation for follow-up studies that link theoretical insights with observational signatures.

2020-10-16
15:00
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TBD
Fred Davies (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
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TBD

2020-10-23
15:00
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Machine vision and the cycle of matter in the magnetized interstellar medium
Juan Soler (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-10-30
15:00
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IAU OAE (TBA)
Königstuhl Kolloquium ( Home pageHephysto link )
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Blocked for talk related to ROSE/IAU OAE.

2020-11-06
15:00
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TBD
Maryam Modjaz (NYU)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2020-11-06
15:00
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Maryam Modjaz (NYU)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-11-13
15:00
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TBD
Maryam Modjaz (NYU)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2020-11-20
15:00
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Jonathan Henshaw (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-11-27
15:00
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Patzer Colloquium (MPIA/ZAH)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-12-04
15:00
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HH2020 speaker (CfA)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-12-11
15:00
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Diederik Kruijssen (ARI)
Königstuhl Kolloquium ( Home pageHephysto link )
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2020-12-18
15:00
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Laura Kreidberg (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
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2021-01-15
15:00
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Brauer Award talk
Sarah Leslie (Leiden)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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TBD

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