Found 51 talks archived in The Galaxy

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Tuesday September 3, 2013
Dr. Ortwin Gerhard
Max-Planck-Institut fuer extraterrestrische Physik, Germany

Abstract

2- Stellar orbits and dynamical models

- orbits in various potentials, Jeans Thm, DF models, Schwarzschild, M2M


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Tuesday September 3, 2013
Dr. Ken Freeman
Australian National University, Australia

Abstract

2- The thin disk.

- observational issues with the star formation history and the dynamical evolution of the thin disk.

- continuing gas accretion

- theoretical ideas about the formation and evolution of the thin disk.


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Tuesday September 3, 2013
Dr. Jerry Sellwood
Rutgers University, USA

Abstract

2- Poisson solvers

- trees

- fixed and adaptive grids

- parallelization


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Monday September 2, 2013
Dr. Ken Freeman
Australian National University, Australia

Abstract

1-  Overview of the structure of our Galaxy in the context of other galaxies

- the basic components

- dark matter properties

- general ideas about galaxy assembly


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Monday September 2, 2013
Dr. Leo Girardi
Osservatorio Astronomico di Padova, INAF, Italy

Abstract

1- The basics

- overview of stellar evolution as a function of mass and metallicity

- from evolutionary tracks to isochrones

- quick overview of chemical changes at the stellar surface


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Monday September 2, 2013
Dr. Ortwin Gerhard
Max-Planck-Institut fuer extraterrestrische Physik, Germany

Abstract

1- Fundamental stellar dynamics

- relaxation, collisionless dynamics

- distribution functions, Jeans eqs, etc.


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Monday September 2, 2013
Dr. Jerry Sellwood
Rutgers University, USA

Abstract

1- The use and abuse of N-body codes

- relaxation in spheres and disks,  collective enhancement

- code structure, block time steps


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Thursday July 4, 2013
Dr. Tom Maccarone
Texas Tech University

Abstract

In the past few years, a series of discoveries have been made of objects which appear to be accreting stellar mass black holes in globular clusters -- both in the Milky Way and in other nearby galaxies. I will discuss why the theoretical work which suggested that such objects would be unlikely to exist, the observations showing they do exist, some of the unusual aspects of some of the individual sources, and the new theoretical framework for producing them.


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Thursday May 9, 2013
Dr. Inmaculada Martínez Valpuesta
Max-Planck-Institute for Extraterrestrial Physics

Abstract

Among the different effects of secular evolution of galaxies we find how bars influence enormously their host galaxies. For many years now, it is known how the evolution of bars will produce different boxy/peanut and X-shape bulges. In this context our Milky Way is an example of a boxy bulge, and we will present a self consistent N-body simulation of a barred galaxy that will be compared with some of the Milky Way available data. We will compare the model in terms of morphology and structure, kinematics and finally metallicity gradients.


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Tuesday November 6, 2012
Dr. Matteo Monelli, Dr. Antonio Milone
IAC

Abstract

The classical idea that globular clusters are the prototypes of simple stellar populations has been revolutionized in the last few years. Multiple sequences of stars have been detected in the colour-magnitude diagram of a number of clusters, mostly thanks to high-precision HST photometry, and the correlation with the chemical properties of different generations of stars has been demonstrated. In this talk, we will first present a summary of the observational picture, and we will then introduce the SUMO project (a SUrvey of Multiple pOpulations). This is a long-term project, lead here at the IAC and aimed at detecting and characterizing multiple populations in a large sample of globular clusters. We will review the scope, the observing and reduction strategy, and the first results. So far, data for more than 30 clusters have been secured, using the wide field imagers available at the 2.2m ESO/MPI and INT telescope, thus covering both hemispheres. We will present a new photometric index which turned out to be very effective in detecting multiple RGBs in nearly all the clusters analyzed so far. The connection with the chemical content of the different populations will be also discussed.



Upcoming talks

  • TODAY: Sistema de control de EST
    Jorge Quintero Nehrkorn
    Friday October 7, 2022 - 10:00 GMT+1  (Aula)
  • TBD
    Dr. Roger Hoyland
    Friday October 14, 2022 - 10:00 GMT+1  (Aula)

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