NGC 3576: Spontaneous or Triggered Formation of a Giant HII Region

Details NGC 3576: Spontaneous or Triggered Formation of a Giant HII Region NGC 3576: Spontaneous or Triggered Formation of a Giant HII Region

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop41024t&link_type=abstract

Spitzer Proposal ID #41024

Physics

Scientific paper

Our understanding of massive star formation is uncertain at all levels, from individual stars to massive stellar clusters to OB associations. Our first Chandra observation of the Galactic giant HII region NGC 3576 addressed one example of the first of these problems: because hard X-rays penetrate even very large columns of obscuring material, we were able to pinpoint massive, young, embedded stars that remained undetected even at 3.5 microns, solving the mystery of NGC 3576's missing ionizing sources. With a new ACIS-I pointing and the first Spitzer observation of this target, we will address the second two of these problems: how massive clusters form and how they are related to the formation and evolution of the larger-scale, unbound populations known as OB associations.

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