NEW YOUNG STAR CANDIDATES IN CG4 AND Sa101

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/142/1/25· OSTI ID:21583052

Rebull, L M; Laine, S; Laher, R; Legassie, M ^[1]; Johnson, C H ^[2]; Hoette, V ^[3]; Kim, J S; Foster, M ^[4]; Mallory, C R ^[5]; McCarron, K ^[6]

---

1. Spitzer Science Center/Caltech, M/S 220-6, 1200 E. California Blvd., Pasadena, CA 91125 (United States)
2. Breck School Science Department, 123 Ottawa Ave., N., Golden Valley, MN 55422 (United States)
3. The University of Chicago Department of Astronomy and Astrophysics, Yerkes Observatory Education and Outreach, 373 W. Geneva St., Williams Bay, WI 53191 (United States)
4. Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721 (United States)
5. Department of Astronomy, Pierce College, 6201 Winnetka Ave., Woodland Hills, CA 91371 (United States)
6. Science Division, Oak Park and River Forest High School, 201 N. Scoville Ave., Oak Park, IL 60302 (United States)

The CG4 and Sa101 regions together cover a region of {approx}0.5 deg{sup 2} in the vicinity of a 'cometary globule' that is part of the Gum Nebula. There are seven previously identified young stars in this region; we have searched for new young stars using mid- and far-infrared data (3.6-70 {mu}m) from the Spitzer Space Telescope, combined with ground-based optical data and near-infrared data from the Two Micron All Sky Survey. We find infrared excesses in all six of the previously identified young stars in our maps and identify 16 more candidate young stars based on apparent infrared excesses. Most (73%) of the new young stars are Class II objects. There is a tighter grouping of young stars and young star candidates in the Sa101 region, in contrast to the CG4 region, where there are fewer young stars and young star candidates, and they are more dispersed. Few likely young objects are found in the 'fingers' of the dust being disturbed by the ionization front from the heart of the Gum Nebula.

• OSTI ID: 21583052
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 142, Issue 1; Other Information: DOI: 10.1088/0004-6256/142/1/25; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DUSTS
IONIZATION
NEBULAE
STARS
TELESCOPES