Today:
Upcoming:
TBD
Benedikt Schosser
Thu, 5 Dec 2024, 11:00
The epic story of the Gaia First Look
Martin Altmann
Thu, 5 Dec 2024, 11:15
UV/IR relations from string theory
Ivano Basile
Thu, 5 Dec 2024, 16:15
TBA
Murat Günaydin
Mon, 9 Dec 2024, 16:15

Tracing Star Formation Across Scales: A Case Study in the Solar Neighborhood

Professor Catherine Zucker , Center for Astrophysics, Harvard & Smithsonian
The processes regulating star formation in galaxies act across many orders of magnitude in spatial scale. Thus, a key challenge in understanding star formation is bridging the small-scale physics within molecular clouds and the large-scale structure of spiral galaxies. Fully constraining the physics of star formation across these scales requires constraints on both the 3D spatial structure and dynamical state of the interstellar medium (ISM), the combination of which has been an essentially unknown quantity in the field of star formation research. In this talk, I will discuss ongoing efforts to construct high-dimensional models of the ISM in the solar neighborhood by combining data science and visualization techniques with wide-field photometric, astrometric, and spectroscopic surveys. On kiloparsec scales, I will discuss how "3D dust mapping" has enabled constraints on the global distribution of molecular clouds, revealing new links between clouds long thought to be isolated and challenging fundamental assumptions about the shape and position of a nearby spiral arm. On parsec scales, I will show how combining 3D dust mapping with the 3D space motions of young stars can explain the origin of local star formation as being driven by the expansion of the Local Bubble, the nearest superbubble to the Sun. Finally, on au-scales, I will discuss the implications that the Sun’s trajectory through the ISM has for the properties of the heliosphere and the geological record here on Earth. I will conclude by previewing the opportunities enabled by future infrared surveys, including SDSS-V and Roman, which together will pave the way for a unified understanding of the multi-scale physical processes shaping star formation in diverse environments across the Milky Way’s disk. Those unable to attend the colloquium in person are invited to participate online through Zoom (Meeting ID: 942 0262 2849, passcode 792771) using the link: https://eu02web.zoom-x.de/j/94202622849?pwd=dGlPQXBiUytzY1M2UE5oUDRhbzNOZz09 During her visit to Heidelberg, Professor Zucker will be available for meetings by arrangement with her host, Ralf Klessen (klessen@uni-heidelberg.de)
Heidelberg Joint Astronomical Colloquium
23 Jul 2024, 16:30
Philosophenweg 12, Main Lecture hall (gHS)

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