Seminars and Colloquia at ESO/Santiago

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


Broadcast of the ESO talks is available upon request.  If anyone is interested, kindly contact us via email
at least 30 min prior  to the beginning of the talk.


October 2014

22.10.14 (Wednesday)
12:00
"Gas Flows (In&Out) around Galaxies using Background Quasars"
Nicolas BOUCHÉ (Institut de Recherche en Astrophysique et Planétologie (IRAP))
Abstract
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"Gas Flows (In&Out) around Galaxies using Background Quasars"

Nicolas BOUCHÉ (Institut de Recherche en Astrophysique et Planétologie (IRAP))

Abstract

The efficiency to form galaxies is low (10%) and decreases sharply in low mass galaxies. This puzzle is often solved in numerical models by invoking feedback processes such as super-novae driven winds. This solution is natural given that outflows appear ubiquitous in star-forming galaxies, but their properties are however poorly known (such as the mass outflow rate). This lack of knowledge is prevents numerical models to make predictive simulations. In the past few years, background quasars have shown to be useful probes of galactic winds. In this talk, we will review the recent advances in this emerging field and show that the VLT is playing a huge role with IFUs such as SINFONI and now MUSE. We will show that the background quasar technique can also constrain the gas accretion phenomenon inside the halos of galaxies.

30.10.14 (Thursday)
12:00
"AGN torus and Starburst scenario in the central 100 pc of IC 3639"
Juan Antonio FERNANDEZ ONTIVEROS ()
Abstract
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"AGN torus and Starburst scenario in the central 100 pc of IC 3639"

Juan Antonio FERNANDEZ ONTIVEROS ()

Abstract

The detection of the active nucleus in IC 3639 using the no-track mode in VLTI/MIDI corresponds to one of the faintest measurements so far achieved with mid-IR interferometry. Strong star-formation and AGN activity coexist on small spatial scales in the nucleus of IC 3639, within the inner 100 pc. The resulting brightness distribution shows the contribution of the the AGN, which explains dust heating in the innermost parsecs, plus the star-formation component that heats the dust at larger scales and dominates the total mid-IR luminosity. The case of IC 3639 is in contrast with the quenching of star-formation activity by AGN feedback scenario.


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