Počet záznamů: 1  

Clumps and triggered star formation in ionized molecular clouds

  1. 1. 0423674 - ASU-R 2014 RIV GB eng J - Článek v odborném periodiku
    Walch, S. - Whitworth, A. - Bisbas, T. - Wünsch, Richard - Hubber, D.A.
    Clumps and triggered star formation in ionized molecular clouds.
    Monthly Notices of the Royal Astronomical Society. Roč. 435, č. 2 (2013), s. 917-927 ISSN 0035-8711
    Grant CEP: GA ČR GAP209/12/1795
    Institucionální podpora: RVO:67985815
    Klíčová slova: hydrodynamics * stars formation * ISM bubbles
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
    Impakt faktor: 5.226, rok: 2013

    Infrared shells and bubbles are ubiquitous in the Galaxy and can generally be associated with H II regions formed around young, massive stars. In this paper, we use high-resolution 3D SPH simulations to explore the effect of a single O7 star emitting photons at 10(49) s(-1) and located at the centre of a molecular cloud with mass 10(4) M-circle dot and radius 6.4 pc; the internal structure of the cloud is characterized by its fractal dimension, D (with 2.0 <= D <= 2.8), and the variance of its (lognormal) density distribution, sigma(2)(O) (with 0.36 <= sigma(2)(O) <= 1.42). Our study focuses on the morphology of the swept-up cold gas and the distribution and statistics of the resulting star formation. If the fractal dimension is low, the border of the H II region is dominated by extended shell-like structures, and these break up into a small number of massive high-density clumps which then spawn star clusters; star formation occurs relatively quickly, and delivers somewhat higher stellar masses.
    Trvalý link: http://hdl.handle.net/11104/0229846