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 60 min prior  to the beginning of the talk.


April 2015

20.04.15 (Monday)
12:00
"High-redshift Galaxy Proto-clusters as an Interface Between Structure, Cluster, and Galaxy Formation"
Yi-Kuan CHIANG (University of Texas at Austin)
Abstract
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"High-redshift Galaxy Proto-clusters as an Interface Between Structure, Cluster, and Galaxy Formation"

Yi-Kuan CHIANG (University of Texas at Austin)

Abstract

Proto-clusters, the ancestor large-scale structures of present day galaxy clusters, are ideal laboratories to study dark matter assembly, cosmic baryon cycle, galaxy growth, and environmental impacts on galaxy evolution. I will first present the LCDM predictions for the physical properties and observational signatures of galaxy proto-clusters. I will talk about our ongoing efforts to search for z>2 proto-clusters in photometric and emission line galaxy surveys. Finally, we will put cluster progenitors in the context of cluster formation and galaxy evolution, highlighting their unique roles linking scales from large to small, and epochs form active star-formation to quenching.

30.04.15 (Thursday)
14:00
"The circumstellar environment of young brown dwarfs" (Joint ESO/ALMA Colloquium)
Jean-Louis MONIN (Obs. de Grenoble - Univ. J. Fourier, France)
Abstract
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"The circumstellar environment of young brown dwarfs"

Jean-Louis MONIN (Obs. de Grenoble - Univ. J. Fourier, France)

Abstract

Young brown dwarfs (BD) have intermediate masses between low mass stars and planets and therefore occupy a unique niche in our exploration of the star and planet formation process. Evidence are growing that stars and BD share the same formation mechanism (eg. Chabrier, 2013, PP6 conference). This common formation route could even be the same for free-floating planets. Among the physical phenomena related to star formation, accretion and ejection are ubiquitous. Young Brown dwarfs present a disk frequency similar and sometimes larger than the one of their higher mass TTS counterparts (eg. Monin et al. 2010). However, the outflow phenomenon remains quasi unexplored in the substellar domain. Using the IRAM 30m telescope, we have performed a systematic search for outflow signatures in a large sample of VLMS and BD in Taurus and ρ Oph star forming regions. In the course of this survey, we have confirmed previous detections (rho-OPH 102, MHO5 ; Phan-Bao 2008, 2011) and we have discovered 2 other outflows in BDs (FUTau, Monin et al. 2013 ; BD Tau 6, Monin et al. 2014, CS 18 conference).
I will also present follow-up observations on the IRAM interferometer that have revealed the structure of some of these outflows with a spatial resolution ~ 1 arcsec.


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