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


2023-01-31
16:00
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Early galaxies and black holes: the first six months from the JWST NIRSpec GTO programme
Professor Roberto Maiolino (Kavli Institute for Cosmology, Cambridge, UK)
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Physikalisches Institut, Philosophenweg 12, Main lecture theatre

2023-02-02
11:15
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Population Analysis of Short Gamma-ray Bursts and Magnetar Giant Flares
Elisa Schoesser (ARI)
ARI Institute Colloquium ( Hephysto link )
ARI, Moenchhofstrasse 12-14, Seminarraum 1, 1.OG
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Abstract
Magnetars are highly-magnetized (ca. 1016 G) neutron stars which may randomly emit bursts of high energy radiation, in the form of hard X-rays or much more rarely giant flares of gamma-rays during their active phase. Recent observations of GRB 200415A, a short and very bright pulse of gamma-rays, have been claimed to be an extragalactic magnetar giant flare (MGF) whose host galaxy is the Sculptur Galaxy (NGC 253). However, as the redshift of the transient object was not able to be measured, it is possible that the measured location of the transient on the celestial sphere and the location of the local galaxy merely coincide. Thus, its real progenitor could have been arbitrarily far away, leaving the standard model of short gamma-ray bursts (SGRBs), the merger of two compact objects, as an explanation for the observations. In this talk, I will present an estimate of the false-alarm rate of SGRBs being incorrectly identified as MGFs using population synthesis to simulate data collected by the Gamma-ray Burst Monitor onboard the Fermi Gamma-ray Space Telescope.

2023-02-03
11:00
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From the Galaxy to Stars: Galactic Multi-scale Simulations of GMC and Star Cluster Formation
Ralph Pudritz (McMaster)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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Abstract
The advent of ALMA, JWST, and a host of recent high resolution atomic hydrogen, molecular gas, and dust surveys are transforming our understanding of star formation over a very wide range of physical scales. From large scale kpc filaments and superbubble structures, to giant molecular clouds (GMCs) on 100 pc scales, star clusters (1 pc) and the sub pc scale filaments in which we observe individual stars form, a new hierarchical and dynamic picture of star formation is emerging. I will review recent progress in simulations and theory of star formation that addresses the physical connections between structure formation from the galactic to pc scales. I will then discuss our own recent galactic multi-scale, zoom-in simulations that allows us to track the formation of structure from galactic to sub pc scales in a magnetized, Milky Way like galaxy undergoing supernova driven feedback processes. A wide variety of structures including superbubbles, kpc atomic gas filaments, smaller scale filamentary GMCs, and star cluster regions form. Gravitational instability of filaments on these different scales and filamentary flows within them, drive GMC and cluster formation respectively. In quieter regions, galactic shear can produce filamentary GMCs within flattened, rotating disk-like structures on 100 pc scales. Strikingly, magnetic field topologies associated with such disk structures are highly helical. This variety seems to reflect recent observational 3D structure maps of nearby GMCs.

2023-02-07
16:00
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Untangling Galaxy Evolution in the New Spectroscopic Era
Professor Allison Strom (Center for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University, USA)
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Physikalisches Institut, Philosophenweg 12, Main lecture theatre
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A central goal of modern astrophysics is to understand how galaxies grow and change over the 14 Gym of cosmic history. To achieve this goal, it is necessary to disentangle the competing effects of the many baryonic processes that govern galaxy evolution alongside the dark matter-dominated growth of large-scale structure---including accretion of gas from the cosmic web, as well as outflows and feedback driven by massive stars and accreting supermassive black holes. These processes are difficult to observe directly, and an added complication is that much of what we know about the galaxy population is based on the present-day Universe (z~0), even though the vast majority of stars in galaxies were formed at much earlier times (z>1, more than ~7 Gyr ago). Fortunately, using new facilities like the James Webb Space Telescope (JWST) and premier ground-based observatories like the Keck Telescopes, we are now on the cusp of being able to study galaxies in detail at all cosmic times. I will share recent progress in characterizing the galaxy population during the peak of galaxy assembly 10-12 Gyr ago (z~2-3), including efforts by my group to use extremely deep Cycle 1 JWST/NIRSpec observations to accurately determine the chemical abundances in these distant galaxies. I will also preview science that will soon be possible with a large upcoming galaxy survey using the new Prime Focus Spectrograph (PFS) on the Subaru Telescope, which will target hundreds of thousands of galaxies during the period 5-10 Gyr ago when many were transitioning from highly star-forming to relatively quiescent, like the majority of galaxies today. 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://zoom.us/j/94202622849?pwd=dGlPQXBiUytzY1M2UE5oUDRhbzNOZz09 Prof. Strom is visiting the Max-Planck Institute fuer Astronomy, and is available for meetings by arrangement with her host, (banados@mpia.de).

2023-02-09
11:15
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Stellar feedback shaping the ionized ISM in the nearby galaxies
Oleg Egorov (ARI)
ARI Institute Colloquium ( Hephysto link )
ARI, Moenchhofstrasse 12-14, Seminarraum 1, 1.OG
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Abstract
Stellar feedback plays an important role in the regulation of the structure, kinematics and chemical abundance of the interstellar medium. Multiple stellar winds and supernovae explosions inject energy and momentum into the interstellar medium. These processes are probable drivers of the turbulence of the ISM. They can also create large holes and superbubbles with sizes varying from several pc to several kpc. Modern integral-field spectrographs allow us to study the resolved properties of the ionized gas, and the high-resolution images from space base telescopes provide information about young stars in the nearby galaxies. Thus, using the combined data set, we can connect directly the ionized gas to the young stellar population. In my talk, I will focus on how the mechanical feedback impacts the small-scale morphology and kinematics of the ISM of nearby galaxies as observed in the PHANGS-MUSE and PHANGS-HST data. Also, I will consider how the feedback from young stars affects the dust content in the nearby galaxies based on the new PHANGS-JWST observations.

2023-02-10
11:00
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The First Astronomers: How Indigenous Elders Read the Stars
Duane Hamacher (Melbourne)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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Indigenous Elders of the world are expert observers of the stars. They teach that everything on the land is reflected in the sky, and everything in the sky is reflected on the land. These living systems of knowledge challenge conventional ideas about the nature of science and the longevity of oral tradition. This talk will explore the scientific layers of Australian Indigenous star knowledge with a focus on observations of variable stars, cataclysmic stars, stellar scintillation, the motions of planets, and transient phenomena, showing how this can guide modern scientific research.

2023-02-14
16:00
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Theoretical modelling of star forming galaxies and AGN in the JWST and ELT era
Professor Lisa Kewley (Center for Astrophysics, Harvard University, USA)
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Physikalisches Institut, Philosophenweg 12, Main lecture theatre

2023-02-16
11:15
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Walter Dehnen (ARI)
ARI Institute Colloquium ( Hephysto link )
ARI, Moenchhofstrasse 12-14, Seminarraum 1, 1.OG
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2023-02-17
11:00
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Giulia Perotti (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-02-17
11:00
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Chris Byrohl (ZAH/ITA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-02-17
11:00
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DZA
Stefan Wagner (ZAH/LSW)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-02-24
11:00
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TBD
Inga Kamp (Groningen)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-03-03
11:00
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Giulia Perotti (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-03-17
11:00
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Anders Johansen (The GLOBE Institute)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-03-24
11:00
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Chris Byrohl (ZAH/ITA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2023-03-31
11:00
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Ivanna Escala (Princeton U.)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-04-14
11:00
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Ivanna Escala (Princeton U.)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-05-05
11:00
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Giancarlo Mattia (Arcetri)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-05-12
11:00
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Michael Küffmeier (MPE)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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2023-11-24
11:00
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Patzer Colloquium (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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