Seminars and Colloquia at ESO Santiago

May 2019

28/05/19 (Tuesday)
12:00, Urania room (ESO, Santiago) | ESO Santiago
ESO Thirty Minute Talks
Talk — The curious case of II Lup: plumes, spirals and obscurations
Foteini Lykou (The University of Hong Kong)

Abstract

I will be presenting my recent work (Lykou et al. 2018) on high-angular resolution imaging on the circumstellar envelope of a peculiar C-rich AGB star, II Lup, from NACO, VISIR and ALMA observations. Our images indicate that we may have detected the origin of a spiral arm in the near-infrared, which should be related to the spiral seen by ALMA. 

June 2019

03/06/19 (Monday)
12:00, Urania room (ESO, Santiago) | ESO Santiago
ESO Thirty Minute Talks
Talk — Fun with Radiative Entropy Transfer
Christopher Essex (University of Western Ontario)

Abstract

Photons, neutrinos, thermodynamics, and atmospheres will be looked at. There will be some weird minimum principles, and thoughts about strange generalized winds. All this in 30 minutes!

 

 
04/06/19 (Tuesday)
12:00, Library (ESO, Vitacura) | ESO Santiago
ESO Thirty Minute Talks
Talk — Galactic Planetary Nebulae with Emphasis on those that are Members of Open Star Cluster
Vasiliki Fragkou (The University of Hing Kong)

Abstract

The study of Planetary Nebulae (PNe) provides vital clues for understanding late stage stellar evolution and stellar mass loss. Despite their significance, various issues concerning these objects remain unsolved. Interstellar extinction by dust hampers the detection of many Galactic PNe at optical wavelengths while their largely unknown distances and progenitor masses are two key parameters that hamper deeper understanding.
Identification of dust obscured PNe can be partially solved with observations at longer wavelengths where extinction effects are less serious and by multi-wavelength techniques proposed for their detection. Here, the efficacy of these methods is evaluated for identification of new Galactic PN candidates.
PNe in Galactic star clusters have distances and progenitor masses determined independently from cluster color-magnitude diagrams. Here, we study the first confirmed PN-open cluster pair (PHR1315-6555 – AL 1) identifying its central star and measuring its physical properties. We also demonstrate in detail the physical association of PN BMP J1613-5406
with Galactic open cluster NGC 6067. The PN’s progenitor mass is   ̴5.6 Mʘ. Finally, we provide preliminary details on several additional cases of possible PN-cluster associations we have uncovered.
Our new PN-open cluster associations contribute to the improvement of the initial-to-final mass relation and our multi-wavelength study suggests that a new erabegins for the identification of Galactic PNe hidden by dust.
 
05/06/19 (Wednesday)
15:30, Urania room (ESO, Santiago) | ESO Santiago
ESO Colloquium
Talk — TBD
Francisco Forster (CMM, Universidad de Chile)

Abstract

TBD

19/06/19 (Wednesday)
12:00, Urania room (ESO, Santiago) | ESO Santiago
ESO Thirty Minute Talks
Talk — Recent advances in the studies of magnetic fields in the pre-main-sequence Herbig Ae/Be stars
Swetlana Hubrig (Leibniz Institute for Astrophysics Potsdam (AIP))

Abstract

The pre-main-sequence phase, where the central protostar feeds
from its surrounding planet-forming accretion disc, is
crucial for understanding how worlds like our Solar System are born.
About two dozens pre-main-sequence Herbig Ae/Be stars have been reported to hold
globally organized magnetic fields. Our analysis of their magnetic fields based on
observations obtained with HARPSpol at ESO's 3.6m telescope supports the idea
that the low detection rate of magnetic fields in these stars can be explained by the
weakness of these fields: only a few stars have magnetic fields stronger than 200G,
and half of the sample possesses magnetic fields ≤ 100G, whereas their lower mass T Tauri
counterparts possess kG magnetic fields.

20/06/19 (Thursday)
12:00, Library (ESO, Vitacura) | ESO Santiago
TMT (30 minutes talk)
Talk — TBD
Emily Rickman (Observatoire astronomique de l'Université de Genève)

Abstract

TBD

24/06/19 (Monday)
12:00, Library (ESO, Vitacura) | ESO Santiago
ESO Thirty Minute Talks
Talk — TBD
Steffen Mieske (ESO)

Abstract

TBD

July 2019

04/07/19 (Thursday)
12:00, Library (ESO, Vitacura) | ESO Santiago
ESO workshop
Talk — A meta analysis of 56Ni masses from core-collapse supernovae
Joe Anderson (ESO)

Abstract

TBD

05/07/19 (Friday)
12:00, Library (ESO, Vitacura) | ESO Santiago
TMT (30 minutes talk)
Talk — TBD
Dr. Giuliano Giuffrida (TBD)

Abstract

TBD

August 2019

09/08/19 (Friday)
12:00, Urania room (ESO, Santiago) | ESO Santiago
ESO Thirty Minute Talks
Talk — TBD
Soeren Larsen (Department of Astrophysics/IMAPP, Radboud University)

Abstract

TBD

Calendars

Choose your preferred calendar format to stay informed

Past Talks

Partly with videos