A co line and infrared continuum study of the active star-forming complex W51

Miju Kang, John H Bieging, Craig A. Kulesa, Youngung Lee, Minho Choi, William L. Peters

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present the results of an extensive observational study of the active star-forming complex W51 that was observed in the J = 2 - 1 transition of the 12CO and 13CO molecules over a 1. ° 25 × 1. ° 00 region with the University of Arizona Heinrich Hertz Submillimeter Telescope. We use a statistical equilibrium code to estimate physical properties of the molecular gas. We compare the molecular cloud morphology with the distribution of infrared (IR) and radio continuum sources and find associations between molecular clouds and young stellar objects (YSOs) listed in Spitzer IR catalogs. The ratios of CO lines associated with Hii regions are different from the ratios outside the active star-forming regions. We present evidence of star formation triggered by the expansion of the Hii regions and by cloud-cloud collisions. We estimate that about 1% of the cloud mass is currently in YSOs.

Original languageEnglish (US)
Pages (from-to)58-76
Number of pages19
JournalAstrophysical Journal, Supplement Series
Volume190
Issue number1
DOIs
StatePublished - Sep 2010

Fingerprint

continuums
molecular clouds
stars
molecular gases
estimates
catalogs
star formation
physical properties
telescopes
collisions
expansion
physical property
collision
radio
molecules
gas
young
distribution
code

Keywords

  • Hii regions
  • Infrared: ISM
  • ISM: individual objects (W51)
  • Radio lines: ISM
  • Stars: formation

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

A co line and infrared continuum study of the active star-forming complex W51. / Kang, Miju; Bieging, John H; Kulesa, Craig A.; Lee, Youngung; Choi, Minho; Peters, William L.

In: Astrophysical Journal, Supplement Series, Vol. 190, No. 1, 09.2010, p. 58-76.

Research output: Contribution to journalArticle

Kang, Miju ; Bieging, John H ; Kulesa, Craig A. ; Lee, Youngung ; Choi, Minho ; Peters, William L. / A co line and infrared continuum study of the active star-forming complex W51. In: Astrophysical Journal, Supplement Series. 2010 ; Vol. 190, No. 1. pp. 58-76.
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