Seminars and Colloquia at ESO Garching

For ESO and ESO-related Conferences and Workshops in Europe and Chile please check the main Conferences and Workshops page.

October 2014

27.10.14 (Monday)
11:00, MIAPP building, Lecture Hall,
Cosmic Chemical Evolution - Cluster Lectures / Part 1
"Overview"
Nikos Prantzos (IAP Paris / Cluster guest)
28.10.14 Tuesday)
11:00, MIAPP building, Lecture Hall,
Cosmic Chemical Evolution - Cluster Lectures / Part 2
"A (not so simple) case study: the Solar neighborhood"
Nikos Prantzos (IAP Paris / Cluster guest)
28.10.14 (Tuesday)
12:30, ESO auditorium "Telescopium", Lunch Talk
"Shed Light on the Properties of the Circum/Inter-galactic Gas"
Fabrizio Arrigoni (MPIA Heidelberg)
Abstract
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"Shed Light on the Properties of the Circum/Inter-galactic Gas"

Fabrizio Arrigoni (MPIA Heidelberg)

Abstract
Giant (100 kpc) and luminous Lyman-alpha nebulae are observed at high redshift around high-redshift radio galaxies (HZRGs), QSOs, and in a population known as Lyman-alpha blob (LABs). There is a growing body of evidence that all of these phenomenon are somehow related, although the mechanism powering their emission is poorly understood. I will present the first results of an ongoing narrow-band imaging survey for diffuse Ly-alpha emission around z ~ 2 quasars, including the discovery of two of the largest Ly-a nebulae known, with emission extending out to ~ 500 kpc into the cosmic web. Observations of high-ionization emission lines like HeII (1640A) and CIV (1549A) provide important diagnostics of physical conditions in these nebulae, and clues to the mechanism that power them. I will present sensitive observations of these emission lines, for a giant Ly-a nebula around a quasar, as well as from deep observations of a sample of 13 Ly-alpha blobs. I will show how photoionization models can be used to interpret such observations. Future deep observations with VLT/MUSE will revolutionize the study of such nebulae, allowing the detection of multiple diagnostic lines, which will provide important constraints on the physical nature of circum/inter-galactic gas.
29.10.14 (Wednesday)
11:00, MIAPP building, Lecture Hall,
Cosmic Chemical Evolution - Cluster Lectures / Part 3
"The Milky Way halo"
Nikos Prantzos (IAP Paris / Cluster guest)
29.10.14 (Wednesday)
16:30, Cluster building, Boltzmannstr. 2, Universe Colloquium
"Particle Physics meets Astrophysics: Astrophysical counterparts of IceCube neutrinos""
Elisa Resconi (TUM) and Paolo Padovani (ESO)
Abstract
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"Particle Physics meets Astrophysics: Astrophysical counterparts of IceCube neutrinos""

Elisa Resconi (TUM) and Paolo Padovani (ESO)

Abstract
IceCube has recently reported the discovery of high-energy neutrinos of astrophysical origin, opening up the PeV (10^15 eV) sky. These observations are challenging to interpret on the astronomical side and have triggered a fruitful intra-cluster collaboration across particle and astro-physics. Elisa (TUM) and Paolo (ESO) will first describe the IceCube experiment and then, by using positional and energetic diagnostics, discuss plausible astronomical counterparts to the neutrino events. These include extragalactic sources, namely BL Lacertae objects, a sub-class of blazars, and Galactic pulsar wind nebulae. They will conclude by addressing the implications of our results and possible ways forward.
30.10.14 (Thursday)
11:00, MIAPP building, Lecture Hall,
Cosmic Chemical Evolution - Cluster Lectures / Part 4
"Lightweights and Heavyweights"
Nikos Prantzos (IAP Paris / Cluster guest)
30.10.14 (Thursday)
11:10, ESO Library, AGN Club
"The influence of bars on AGN fueling over the last 7 billion years"
Mauricio Cisternas (IAC Tenerife, Spain)
30.10.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"Exploring Strong Gravity in the Galactic Center"
Jason Dexter (MPE)
Abstract
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"Exploring Strong Gravity in the Galactic Center"

Jason Dexter (MPE)

Abstract
The Galactic center black hole, Sgr A*, provides a remarkable opportunity to study strong gravity using either orbiting stars or accreting gas. Very long baseline interferometry observations at millimeter wavelengths are now spatially resolving event horizon scales around Sgr A*, and near-infrared astrometry with the VLTI instrument GRAVITY will achieve similar resolution in the next few years. In both cases, interpreting the data requires physical modeling. I will discuss the construction of relativistic emission models from numerical simulations of black hole accretion flows and jets, what we've learned from their comparison with current data, and the prospects for detecting signatures of strong gravity (e.g., the black hole "shadow") in future observations. I will also argue that the recent discovery of a rare magnetar outburst near Sgr A* implies the presence of an unusual pulsar population in the Galactic center.

November 2014

04.11.14 (Tuesday)
12:30, ESO auditorium "Telescopium", Lunch Talk
"(topic t.b.a.)"
Bram Venemans (MPIA Heidelberg)
Abstract
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"(topic t.b.a.)"

Bram Venemans (MPIA Heidelberg)

Abstract
(available soon)
06.11.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"Cosmology with galaxy redshift surveys"
Gigi Guzzo
Abstract
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"Cosmology with galaxy redshift surveys"

Gigi Guzzo

Abstract
(available soon)
11.11.14 (Tuesday)
12:30, ESO room "Fornax", Lunch Talk
"(topic t.b.a.)"
Eduardo Banados (MPIA Heidelberg)
Abstract
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"(topic t.b.a.)"

Eduardo Banados (MPIA Heidelberg)

Abstract
(available soon)
13.11.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"(topic t.b.a.)"
Cecilia Cecarelli
Abstract
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"(topic t.b.a.)"

Cecilia Cecarelli

Abstract
(available soon)
20.11.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"Nuclear Activity in Nearby Galaxies: Insights into Accretion and Jet Physics"
Luis Ho
Abstract
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"Nuclear Activity in Nearby Galaxies: Insights into Accretion and Jet Physics"

Luis Ho

Abstract
(available soon)
27.11.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"Searching for the origins of galaxy bimodality"
Vivienne Wild (University of St. Andrews, UK)
Abstract
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"Searching for the origins of galaxy bimodality"

Vivienne Wild (University of St. Andrews, UK)

Abstract
Understanding how and why galaxies form and evolve is one of the most challenging problems in modern astrophysics. Our own galaxy, the Milky Way, shows order and structure, as do most massive galaxies in our local neighbourhood. Yet when we look to very distant galaxies they are disordered and chaotic. One leading theory for the origin of this transformation invokes gas-rich mergers, which trigger massive starbursts leading to bulge and supermassive black hole growth. I will start by reviewing the evidence for and against this scenario. I will then turn to the interesting case of post-starburst galaxies at 0<z<2. How many of these recently quenched descendents of massive starbursts could be the progenitors of modern day red ellipticals, and what fraction of red ellipticals could have been formed through the gas-rich mergers required to trigger such strong starbursts?

December 2014

04.12.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"(topic t.b.a.)"
Adam Muzzin
Abstract
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"(topic t.b.a.)"

Adam Muzzin

Abstract
(available soon)
11.12.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"(topic t.b.a.)"
Jonathan Tan (University of Florida)
Abstract
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"(topic t.b.a.)"

Jonathan Tan (University of Florida)

Abstract
(available soon)
18.12.14 (Thursday)
16:15, ESO auditorium "Telescopium", Munich Joint Astronomy Colloquium
"(topic t.b.a.)"
Julio Navarro
Abstract
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"(topic t.b.a.)"

Julio Navarro

Abstract
(available soon)

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Past Talks

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2014, 2013, 2012, 2011, 2010