Login

Physical processes in the ISM

21–25 Oct 2013
MPE
Europe/Berlin timezone

Session

Stellar Feedback in the ISM

23 Oct 2013, 09:00
MPE

MPE

Gießenbachstraße 1 85748 Garching

Conveners

Stellar Feedback in the ISM

  • Enrique Vazquez-Semadeni

Presentation materials

There are no materials yet.

  1. 124. Stellar feedback in the ISM
    Mordecai-Mark Mac Low (AMNH New York)
    23/10/2013, 09:00
    review talk
  2. 38. Molecular cloud formation in stellar feedback flows: Observing, demonstrating, quantifying
    Joanne Dawson (CSIRO Astronomy and Space Science)
    23/10/2013, 09:40
    contributed talk
    I will examine the role of large-scale stellar feedback in the formation of new molecular clouds. The theoretical context for this is the compression, cooling and fragmentation of the atomic medium in turbulent shocks and flows, of which the ubiquitous ""supershells"" formed by multiple supernovae and stellar winds are one example. I will first report CO(J=1-0) and HI 21cm observations of the...
    Go to contribution page
  3. 36. Disruption of GMCs by photoionization and stellar winds - setting the stage for supernovae.
    James Dale (Excellence Cluster Universe, Garching b. München)
    23/10/2013, 09:55
    contributed talk
    On the scale of galactic disks, supernovae are likely to be the most important form of stellar feedback on the ISM. However, the environment in which the supernovae explode is likely to have been strongly modified by the action of other kinds of feedback, particularly the earlier photoionization and winds from the exploding stars. I will present SPH simulations of a parameter space of giant...
    Go to contribution page
  4. 49. The evolution of molecular clouds under the influence of ionizing radiation
    Matthias Gritschneder (Univ California, Santa Cruz)
    23/10/2013, 10:10
    contributed talk
    We study the evolution of molecular clouds under the influence of ionizing radiation. First, we propose that the Pipe Nebula is an HII region swept up by the B2 star theta Ophiuchi. We propose the nebula is currently containing a three phase medium. By means of analytical calculations, we are able to show that the current size, mass and pressure of the region can be explained in this...
    Go to contribution page
  5. 43. Feedback-driven turbulence in the multi-phase ISM
    Andrea Gatto (MPA)
    23/10/2013, 10:25
    contributed talk
    Turbulence is believed to be a crucial component of the interstellar medium's energetic budget. However, its origin and injection scales are still a matter of debate. Following e.g. Mac Low & Klessen (2004), energy injection from Supernova explosions is able to generate and maintain the observed level of turbulence in the ISM, at least in ""normal"" star-forming galaxies. In addition, a...
    Go to contribution page
  6. 83. Understanding ultracompact H II regions
    Thomas Peters (Institut für Theoretische Physik, Universität Zürich)
    23/10/2013, 11:10
    contributed talk
    H II regions are important signatures of star formation, play an important role in destroying the parental molecular clouds in which stars form, and, while still in the ultracompact phase, give insight into the process of high-mass star formation. I will present simulations that consistently follow the gravitational collapse of a massive molecular cloud, the subsequent build-up and...
    Go to contribution page
  7. 62. An analytic model for the dynamics of the ionized outflows of massive protostars
    Eric Keto (Harvard-Smithsonian Center for Astrophysics)
    23/10/2013, 11:25
    contributed talk
    HII regions are the clearest sign of the formation of the most massive stars, and ionization feedback could be responsible for a number of other phenomena observed in the ISM. For example, the general field of turbulence is suspected to be driven, at least in part, by the expansion of HII regions. Ionization feedback may also be responsible, along with stellar winds, for the bubbles seen...
    Go to contribution page
  8. 86. Deciphering the violent interaction between very massive stars and their natal clouds in the Carina Nebula Complex
    Prof. Thomas Preibisch (USM/LMU)
    23/10/2013, 11:40
    contributed talk
    The Carina Nebula constitutes the closest galactic analog of a giant extragalactic HII region. The combination of its large population of very massive stars and its moderate distance of 2.3 kpc makes it an ideal target for detailed studies of small-scale phenomena of the stellar feedback on the surrounding clouds in a starburst-like environment. In the last few years, we have performed several...
    Go to contribution page
  9. 77. Models for the circumstellar medium of massive runaway stars
    Dominique Meyer (Argelander Institut fur Astronomie, Bonn)
    23/10/2013, 11:55
    contributed talk
    Observations of stellar wind bow shocks can be used to constrain stellar, circumstellar and interstellar medium (ISM) properties. This presentation aims at introducing a grid of two-dimensional hydrodynamical simulations of wind-ISM interaction of massive runaway stars. This explores the combined effects of space velocities (ranging from 20 to 70 km/s) and initial masses (ranging from 10 to 40...
    Go to contribution page
  10. 74. Dynamics of H II regions around exiled O stars
    Jonathan Mackey (AIfA, Uni. Bonn)
    23/10/2013, 12:10
    contributed talk
    At least 25 per cent of massive stars are ejected from their parent cluster, becoming runaways or exiles, travelling with often-supersonic space velocities through the interstellar medium (ISM). Their H II regions can strongly impact the structure of the ISM: the overpressurised H II region imparts kinetic energy and momentum to the ISM; it compresses and/or evaporates dense clouds; and it can...
    Go to contribution page
Building timetable...