Ruprecht-Karls-Universität Heidelberg
Vorträge, Seminare, Ereignisse

Vorträge, Seminare, Ereignisse

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


Upcoming events


2018-12-18
16:15
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Star formation from kpc to hundreds of AU scales
Henrik Beuther (MPI for Astronomy (Heidelberg))
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal
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Abstract
Star formation is a hierarchical process where fragmentation and gas dynamical processes start on the largest galactic scales and continue down to the formation and accretion processes around the protostars. Starting with bar-spiral arm interfaces, then going step-wise to smaller scales of molecular clouds, star-forming regions, cores and potential (massive)accretion disks, I will present recent observational results related to the dynamical processes during cloud and star formation.

2019-01-08
16:15
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The IllustrisTNG Project
Lars Hernquist (Harvard-Smithsonian Center for Astrophysics, Cambridge (USA))
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal

2019-01-10
11:15
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Camilla Hansen (MPIA)
ARI Institute Kolloquium ( Hephysto link )
ARI Moenchhofstrasse 12-14, Seminarraum 1
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2019-01-11
15:00
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TBD
Kees Dullemond (ITA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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TBD

2019-01-14
11:15
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Astrometry and more
Gabriele Rodighiero (MPIA)
ITA "blackboard" Colloquium ( Hephysto link )
Philosophenweg, 12, 106

2019-01-15
16:15
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How can nucleosynthesis constrain explosions? New perspectives using multi-D supernova models
Claudia Travaglio (INAF (Turino))
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal
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Abstract
During this seminar I will describe my research program aiming at a better understanding of the physics of supernovae and of the origin of nuclei by increasing the quality and predictive power of numerical models as well as nucleosynthesis calculations. Supernovae play essential roles in the frameworks of many branches of astrophysics: star formation, galaxy dynamics, high-energy astrophysics, galactic chemical evolution, and cosmology. In spite of their ubiquitous presence in astrophysics, there are many uncertainties related to progenitor systems, treatment of the explosions, cross section determinations at such high temperatures, and comparisons with spectra. Most popular results in the field of nucleosynthesis during explosions are still mostly based on one-spatial dimension calculations. The pioneering and very innovative aspect today is the possibility of coupling nucleosynthesis to multidimensional simulations of different type of supernovae. I will show recent results and future perspectives in multi-dimensional calculations of thermonuclear as well as core-collapse supernovae, using tracer particle method for nucleosynthesis. I will illustrate detailed comparison of 1D and 3D supernova models with nucleosynthesis calculations and discussing the needs of multi-D (and where it is needed). Despite the huge investments in nuclear physics experiments, theoretical studies establishing priority lists of reactions to be measured and precision required for astrophysics are currently very limited. During this seminar I will also discuss a priority list for future experiments and improvements in predictions of key nuclear reactions for explosive nucleosynthesis. My expertise in Galactic Chemical Evolution modelling lead to the possibility to study a dependence of the SNe yields on metallicity and their contribution over the galactic age up to reproducing the Solar System composition. During my talk I will refer different times to result of chemical evolution studies with the need of a more clear understanding of the impact of supernovae at the earliest stages of the evolution of galaxies, and their contribution to the Solar System composition. The wealth of information from galactic surveys makes this the ideal time for a theorist to understand the formation and evolution of galaxies with a new generation of chemical evolution models. To this goal, at the end of my talk, I will describe a novel project to model chemo-dynamical evolution of the cosmos, based on a N-body SPH RAMSES code making use of the framework on a moving mesh, adjusting automatically spatial resolution but using a large number of isotopes.

2019-01-17
11:15
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Matteo Mazzarini (ARI)
ARI Institute Kolloquium ( Hephysto link )
ARI Moenchhofstrasse 12-14, Seminarraum 1
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2019-01-18
15:00
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TBA
Jeroen Bouwman (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-01-18
15:00
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TBA
Jeroen Bouwman (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-01-21
11:15
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How stellar feedback shapes nebular emission from star forming regions
Daniel Rahner (ZAH/ITA)
ITA "blackboard" Colloquium ( Hephysto link )
Philosophenweg, 12, 106

2019-01-22
16:15
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Hunting ghostly galaxies with the Dragonfly Telephoto Array
Pieter van Dokkum (Yale University)
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal

2019-01-23
15:15
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Using Multiple Populations to trace the Globular Cluster Contribution to the Field Star Population
Eva K. Grebel (ARI/ZAH)
SFB Seminar - The Milky Way System ( Home pageHephysto link )
ARI seminar room basement, video broadcast to HITS, LSW, MPIA
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Abstract
Galactic globular cluster stars typically show light element abundance variations interpreted as signatures of multiple stellar populations. If multiple populations do indeed form exclusively in sufficiently massive clusters as our current knowledge suggests, they may be used to trace the globular cluster (GC) contribution to the field. Building on our earlier work, we analyzed approximately half a million stellar spectra from SDSS DR14 in order to identify halo field giants showing light element abundance anomalies traced by CN and CH. These chemical signatures are revealing candidates that were likely stripped from GCs. In fact, our search has more than quadrupled earlier samples, yielding the largest data set of candidate former globular cluster stars available so far. These data allow us to constrain the contribution of GCs to halo field stars. We find that the GC contribution is pronounced in the inner halo, but minor in the outer halo, which presumably formed mainly through the accretion of dwarf galaxies. We are now in the process of constraining the orbits and tracing the origin of our candidates using Gaia data.

2019-01-23
16:00
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Hunting abundance spreads in globular clusters of the LMC
Andreas Koch (ARI/ZAH)
SFB Seminar - The Milky Way System ( Home pageHephysto link )
ARI seminar room basement, video broadcast to HITS, LSW, MPIA

2019-01-24
11:15
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The universality of the physics governing massive cluster formation across cosmic time
Diderik Kruijssen (ARI)
ARI Institute Kolloquium ( Hephysto link )
ARI Moenchhofstrasse 12-14, Seminarraum 1
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Abstract
Globular clusters are the relics of extreme star formation in high-redshift galaxies. Their enormous potential as tracers of high-redshift galaxy formation is broadly recognised, but concrete applications of this link have remained out of reach. The key missing ingredient has been to construct an end-to-end model for star cluster formation and evolution in a cosmological context. I will review recent efforts towards formulating models for globular cluster formation and evolution during galaxy formation, showcasing the variety of techniques used, as well as their strengths and weaknesses. I will then present results from the E-MOSAICS project, in which we carry out fully self-consistent, cosmological zoom-in hydrodynamics simulations of the co-formation and evolution of globular clusters and their host galaxies. This work has led to two crucial insights. The first is that the formation of young massive clusters and old globular clusters can be described by a single modelling framework, showing that globular clusters are the relics of regular star formation in high-redshift environments. The second is that the high-pressure formation environment of globular clusters has shaped a wide range of their present-day properties, enabling their direct use as tracers of high-redshift galaxy growth. We demonstrate how globular cluster metallicities, masses, ages, kinematics, and spatial distributions provide a new and exciting window for reconstructing the host galaxy merger history, distinguishing between in-situ and ex-situ galaxy growth, and probing the conditions of cloud-scale star formation and feedback at high redshift. Specifically, I will demonstrate the power of unifying cluster formation and destruction processes across cosmic time by using the E-MOSAICS simulations to derive the formation and assembly history of the Milky Way, culminating in the reconstruction of its merger tree.

2019-01-25
15:00
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TBD
Yuan Wang (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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TBD

2019-01-25
15:00
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TBD
Yuan Wang (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)
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TBD

2019-01-28
11:15
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Observing Large Scale Structures in the Gamma-Ray Sky
Pooja Surajbali (MPIK)
ITA "blackboard" Colloquium ( Hephysto link )
Philosophenweg, 12, 106
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Abstract
The High Altitude Water Cherenkov (HAWC) observatory in Mexico (4100 m .a.s.l.) has just finished its first year of data taking and produced some interesting results. Because of its wide field of view it is currently a unique detector to study extended sources (>2 degree) at energies above a few TeV. One of the largest structures in the gamma-ray sky are the so-called Fermi bubbles, extending to the North and South from the milky way centre. At energies around 1TeV, and above, the HAWC observatory is in a unique position to make observations (or constrain the flux) of the bubbles. From the results of HAWC, modelling of the bubbles with a focus on the energy range above 500 GeV and improving the HAWC event reconstruction, both energy accuracy and flux sensitivity are expected to improve.

2019-01-29
16:15
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Formation and properties of galactic discs: The N-body view
Lia Athanassoula (Laboratoire d’Astrophysique de Marseille (France))
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal

2019-01-31
11:15
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nn
Christoph Engler (ARI)
ARI Institute Kolloquium ( Hephysto link )
ARI Moenchhofstrasse 12-14, Seminarraum 1
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Abstract
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2019-02-01
15:00
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Planetesimal belts are not only traced at long wavelengths
Nicole Pawellek (MPIA) : Clinging dust grains
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-02-04
11:15
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A numerical study on the distribution of the satellite galaxies debris in the Milky Way environment
Matteo Mazzarini (ARI)
ITA "blackboard" Colloquium ( Hephysto link )
Philosophenweg, 12, 106

2019-02-05
16:15
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Molecular tori, black hole fueling and feedback in nearby AGN
Francoise Combes (Observatoire de Paris (France))
Heidelberg Joint Astronomical Colloquium ( Home pageHephysto link )
Philosophenweg 12, Großer Hörsaal

2019-02-06
15:15
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A review of the simulated Milky Ways in the IllustrisTNG simulations and a comparison to the Auriga and NIHAO simulations
Martina Donnari (MPIA Heidelberg)
SFB Seminar - The Milky Way System ( Home pageHephysto link )
MPIA Heidelberg (Seminarraum 306), video broadcast to ARI, HITS, LSW

2019-02-06
16:00
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TBA
Nadine Neumayer (MPIA Heidelberg)
SFB Seminar - The Milky Way System ( Home pageHephysto link )
MPIA Heidelberg (Seminarraum 306), video broadcast to ARI, HITS, LSW

2019-02-07
11:15
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Lensing of '69 -- free gravitational lensing from its models
Jenny Wagner (ARI)
ARI Institute Kolloquium ( Hephysto link )
ARI Moenchhofstrasse 12-14, Seminarraum 1
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Abstract
Strong gravitational lenses can map an extended background source to several highly distorted and magnified images. Analysing the properties of those images yields important information about the distribution of the deflecting mass and the background source. Common approaches to reconstruct the source or the deflecting mass distribution model the global properties of the source and the lens. They obtain a consistent description of the entire configuration by refining the model until it matches the observation to a predefined precision. We develop a new approach to infer local properties of the gravitational lens and to reconstruct the source only using the properties of the multiple images without assuming a lens or a source model. In the talk, I will introduce the method and its applications in comparison to standard lens modelling methods. Since our leading principle to separate data-based information from model assumptions can also be applied to a broader range of research questions, I will conclude with an outlook how this ansatz can be transferred to other topics, based on my former experience searching for open star clusters in the HSOY catalogue.

2019-03-01
15:00
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TBA
: Sara Rezaei Kh. (MPIA)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-03-22
15:00
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Paola Di Matteo (GEPI/Obs. de Paris)
: Signature Speaker
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-03-22
15:00
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Paola Di Matteo (GEPI/Obs. de Paris)
: Signature Speaker
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-03-29
15:00
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Paola Di Matteo (GEPI/Obs. de Paris)
: Signature Speaker
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

2019-04-12
15:00
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TBA
Rolf-Peter Kudritzki (IFA,USM)
Königstuhl Kolloquium ( Home pageHephysto link )
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

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