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.


May 2015

6.05.15 (Wednesday)
15:30
"Young brown dwarfs: testing star and planet formation"
Aleks SCHOLZ (University of St. Andrews, U.K.)
Abstract
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"Young brown dwarfs: testing star and planet formation"

Aleks SCHOLZ (University of St. Andrews, U.K.)

Abstract

Brown dwarfs - objects intermediate in mass between stars and planets - are ideal benchmark objects to test theories of star and planet formation. In particular, we hope to contribute to the understanding of the Initial Mass Function, the evolution of disks, and the physics of accretion. In this talk I will present results from a variety of observational studies focused on young brown dwarfs. I will show recent findings from our brown dwarf survey SONYC (Substellar Objects in Nearby Young Cluster), from IR and submm/mm observations of brown dwarf disks, and from variability studies aimed to constrain magnetic activity and accretion.

7.05.15 (Thursday) -- CANCELLED (to be re-scheduled soon!)
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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