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Title: TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853

Abstract

The environment surrounding Wolf-Rayet (W-R) star HD 211853 is studied in molecular, infrared, as well as radio, and H I emission. The molecular ring consists of well-separated cores, which have a volume density of 10{sup 3} cm{sup -3} and kinematic temperature {approx}20 K. Most of the cores are under gravitational collapse due to external pressure from the surrounding ionized gas. From the spectral energy distribution modeling toward the young stellar objects, the sequential star formation is revealed on a large scale in space spreading from the W-R star to the molecular ring. A small-scale sequential star formation is revealed toward core 'A', which harbors a very young star cluster. Triggered star formations are thus suggested. The presence of the photodissociation region, the fragmentation of the molecular ring, the collapse of the cores, and the large-scale sequential star formation indicate that the 'collect and collapse' process functions in this region. The star-forming activities in core 'A' seem to be affected by the 'radiation-driven implosion' process.

Authors:
; ;  [1];  [2]
  1. Department of Astronomy, Peking University, 100871 Beijing (China)
  2. I. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Str. 77, 50937 Koeln (Germany)
Publication Date:
OSTI Identifier:
22037213
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 751; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; COMPUTERIZED SIMULATION; DISSOCIATION; ENERGY SPECTRA; FRAGMENTATION; GRAVITATIONAL COLLAPSE; INFRARED SPECTRA; ION EMISSION; MOLECULES; PHOTOLYSIS; PHOTON EMISSION; STAR CLUSTERS; WOLF-RAYET STARS

Citation Formats

Liu Tie, Wu Yuefang, Zhang Huawei, and Qin Shengli, E-mail: liutiepku@gmail.com. TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853. United States: N. p., 2012. Web. doi:10.1088/0004-637X/751/1/68.
Liu Tie, Wu Yuefang, Zhang Huawei, & Qin Shengli, E-mail: liutiepku@gmail.com. TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853. United States. doi:10.1088/0004-637X/751/1/68.
Liu Tie, Wu Yuefang, Zhang Huawei, and Qin Shengli, E-mail: liutiepku@gmail.com. Sun . "TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853". United States. doi:10.1088/0004-637X/751/1/68.
@article{osti_22037213,
title = {TRIGGERED STAR FORMATION SURROUNDING WOLF-RAYET STAR HD 211853},
author = {Liu Tie and Wu Yuefang and Zhang Huawei and Qin Shengli, E-mail: liutiepku@gmail.com},
abstractNote = {The environment surrounding Wolf-Rayet (W-R) star HD 211853 is studied in molecular, infrared, as well as radio, and H I emission. The molecular ring consists of well-separated cores, which have a volume density of 10{sup 3} cm{sup -3} and kinematic temperature {approx}20 K. Most of the cores are under gravitational collapse due to external pressure from the surrounding ionized gas. From the spectral energy distribution modeling toward the young stellar objects, the sequential star formation is revealed on a large scale in space spreading from the W-R star to the molecular ring. A small-scale sequential star formation is revealed toward core 'A', which harbors a very young star cluster. Triggered star formations are thus suggested. The presence of the photodissociation region, the fragmentation of the molecular ring, the collapse of the cores, and the large-scale sequential star formation indicate that the 'collect and collapse' process functions in this region. The star-forming activities in core 'A' seem to be affected by the 'radiation-driven implosion' process.},
doi = {10.1088/0004-637X/751/1/68},
journal = {Astrophysical Journal},
number = 1,
volume = 751,
place = {United States},
year = {Sun May 20 00:00:00 EDT 2012},
month = {Sun May 20 00:00:00 EDT 2012}
}