NDLI: Deep near-infrared observations of W 3 Main star forming region

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Deep near-infrared observations of W 3 Main star forming region

Content Provider	Semantic Scholar
Author	Ojha, D. K. Tamura, Motohide Nakajima, Yasushi Fukagawa, Misato
Copyright Year	2004
Abstract	We present a deep JHK s-band imaging survey of the W3 Main star forming region, using the near-infrared camera, SIRIUS (Simultaneous three-color InfraRed Imager for Unbiased Surveys), mounted on the University of Hawaii 2.2 m telescope. The near-infrared survey covers an area of ∼ 24 arcmin 2 with 10 σ – 2 – We construct JHK color-color and J/J-H and K/H-K color-magnitude diagrams to identify young stellar objects and estimate their masses. Based on these color-color and color-magnitude diagrams, a rich population of YSOs is identified which is associated with the W3 Main region. A large number of previously unreported red sources (H-K > 2) have also been detected around W3 Main. We argue that these red stars are most probably pre-main sequence stars with intrinsic color excesses. We find that the slope of the K s-band luminosity function of W3 Main is lower than the typical values reported for the young embedded clusters. The derived slope of the KLF is the same as that found by Megeath et al. (1996), from which analysis by Megeath et al. indicates that the W3 Main region has an age in the range of 0.3–1 Myr. Based on the comparison between models of pre-main sequence stars with the observed color-magnitude diagram we find that the stellar population in W3 Main is primarily composed of low mass pre-main sequence stars. We also report the detection of isolated young stars with large infrared excesses which are most probably in their earliest evolutionary phases.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://arxiv.org/pdf/astro-ph/0403139v1.pdf
Language	English
Access Restriction	Open
Subject Keyword	ABRA gene Accumulation Ratio Cmin Diagram Embedded system Embedding GUCY2C protein, human Image sensor Imager Device Component Stars, Celestial Stellar (payment network)
Content Type	Text
Resource Type	Article

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