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Young Massive Stellar Clusters in the Milky Way: the Cl1813-178 and GLIMPSE 9 Clusters

机译:银河系中的年轻恒星群:Cl1813-178和GLIMPSE 9团

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Most of the stars, if not all, form in clusters, and clusters are generally found in large complexes. However, only a few of such complexes produce young massive clusters. We present first result of an ongoing study to fully map in time and space stellar clusters in two Galactic giant molecular clouds with the aim of understanding how star formation proceeded in the cloud, and of identifying the triggering mechanism. The W33 and GAL23.3-0.3 complexes are both located in the inner Galaxy, and are rich of HII regions, supernova remnants, and candidate clusters. The W33 complex contains one of the most massive Galactic stellar cluster with a mass of (10~4) M_☉, and an age of 4.5 Myrs. The cluster location at the edge of the molecular complex suggests that this is a secondary episod of star formation. The GAL23.3-0.3 appears to contain much older massive stars (~15 Myr).
机译:大多数(如果不是全部)恒星形成团簇,而团簇通常存在于大型复合体中。但是,只有少数这样的复合物产生年轻的大规模簇。我们提出了一项正在进行的研究的第一个结果,该研究旨在完整地绘制两个银河系巨分子云中的时空星团,以期了解星云如何在云中进行并确定触发机制。 W33和GAL23.3-0.3复合物都位于内银河系中,并富含HII区,超新星残留物和候选星团。 W33复杂体是质量最大的银河系恒星团之一,质量为(10〜4)M_☉,年龄为4.5 Myrs。分子复合物边缘的簇位置表明,这是恒星形成的次要现象。 GAL23.3-0.3似乎包含更老的大质量恒星(〜15 Myr)。

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    Max-Planck-Institut fr Radioastronomie, Auf dem Hgel 69, 53121 Bonn, Germany;

    Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623-5604, USA;

    Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623-5604, USA;

    Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623-5604, USA;

    European Southern Observatory, Karl Schwarzschild-Strasse 2, D-85748 Garching bei Munchen,Germany;

    Centra de Astrobiologia (CSIC-INTA), Ctra. de Torrejon a Ajalvir km4, 28850, Torrejonde Ardoz, Madrid, Spain;

    Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA;

    Max-Planck-Institut fr Radioastronomie, Auf dem Hgel 69, 53121 Bonn, Germany;

    Physics and Astronomy Building, 430 Portola Plaza, Box 951547, Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USA;

    Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, US;

    Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK;

    European Southern Observatory, Ave. Alonso de Cordova 3107, Casilla 19, Santiago 19001, Chile;

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  • 正文语种 eng
  • 中图分类 天文学;
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