SIRIUS observations of massive star forming region: W3 Main and NGC 7538

Details SIRIUS observations of massive star forming region: W3 Main and NGC 7538 SIRIUS observations of massive star forming region: W3 Main and NGC 7538

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asthe..98..159o&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 98, No. 3, p. 159 - 162 (2005)

Astronomy and Astrophysics

Astronomy

Star-Forming Regions, Young Stellar Objects

Scientific paper

We report near-infrared (JHKs-band simultaneous) observations of two massive star forming regions (SFRs), W3 Main and NGC 7538 regions. A number of new YSO candidates are found and infrared nebulae associated with YSOs are detected; some show intricate color variations and morphology. A several hundreds of low-mass YSOs are formed with the formation of massive YSOs. Based on NIR-color classification, we found that each group of these YSOs shows clearly separate spatial distributions; Class I-like protostars distribute toward the dense cloud regions and Class II-like YSOs around or in optical (diffuse) HII regions. The distribution in NGC 7538 is most likely to be a signature of sequential star formation process.

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