DETECTION OF STAR FORMATION IN THE UNUSUALLY COLD GIANT MOLECULAR CLOUD G216-2.5
Abstract
The giant molecular cloud G216-2.5, also known as Maddalena's cloud or the Maddalena-Thaddeus cloud, is distinguished by an unusual combination of high gas mass (1-6 x 10{sup 5} M {sub sun}), low kinetic temperatures (10 K), and the lack of bright far-IR emission. Although star formation has been detected in neighboring satellite clouds, little evidence for star formation has been found in the main body of this cloud. Using a combination of mid-IR observations with the IRAC and Multiband Imaging Photometer for Spitzer instruments onboard the Spitzer Space Telescope, and near-IR images taken with the Flamingos camera on the KPNO 2.1 m telescope, we identify a population of 41 young stars with disks and 33 protostars in the center of the cloud. Most of the young stellar objects are coincident with a filamentary structure of dense gas detected in CS (2 {yields} 1). These observations show that the main body of G216 is actively forming stars, although at a low stellar density comparable to that found in the Taurus cloud.
- Authors:
-
- Ritter Observatory, MS-113, University of Toledo, 2801 W. Bancroft St., Toledo, OH 43606 (United States)
- Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States)
- Publication Date:
- OSTI Identifier:
- 21269238
- Resource Type:
- Journal Article
- Journal Name:
- Astronomical Journal (New York, N.Y. Online)
- Additional Journal Information:
- Journal Volume: 137; Journal Issue: 4; Other Information: DOI: 10.1088/0004-6256/137/4/4072; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; CAMERAS; CLOUDS; FAR INFRARED RADIATION; PHOTOMETERS; PHOTON EMISSION; PROTOSTARS; SATELLITES; STARS; TELESCOPES
Citation Formats
Megeath, S T, Allgaier, E, Allen, T, Young, E, Pipher, J L, and Wilson, T. L. DETECTION OF STAR FORMATION IN THE UNUSUALLY COLD GIANT MOLECULAR CLOUD G216-2.5. United States: N. p., 2009.
Web. doi:10.1088/0004-6256/137/4/4072; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Megeath, S T, Allgaier, E, Allen, T, Young, E, Pipher, J L, & Wilson, T. L. DETECTION OF STAR FORMATION IN THE UNUSUALLY COLD GIANT MOLECULAR CLOUD G216-2.5. United States. https://doi.org/10.1088/0004-6256/137/4/4072; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Megeath, S T, Allgaier, E, Allen, T, Young, E, Pipher, J L, and Wilson, T. L. 2009.
"DETECTION OF STAR FORMATION IN THE UNUSUALLY COLD GIANT MOLECULAR CLOUD G216-2.5". United States. https://doi.org/10.1088/0004-6256/137/4/4072; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21269238,
title = {DETECTION OF STAR FORMATION IN THE UNUSUALLY COLD GIANT MOLECULAR CLOUD G216-2.5},
author = {Megeath, S T and Allgaier, E and Allen, T and Young, E and Pipher, J L and Wilson, T. L.},
abstractNote = {The giant molecular cloud G216-2.5, also known as Maddalena's cloud or the Maddalena-Thaddeus cloud, is distinguished by an unusual combination of high gas mass (1-6 x 10{sup 5} M {sub sun}), low kinetic temperatures (10 K), and the lack of bright far-IR emission. Although star formation has been detected in neighboring satellite clouds, little evidence for star formation has been found in the main body of this cloud. Using a combination of mid-IR observations with the IRAC and Multiband Imaging Photometer for Spitzer instruments onboard the Spitzer Space Telescope, and near-IR images taken with the Flamingos camera on the KPNO 2.1 m telescope, we identify a population of 41 young stars with disks and 33 protostars in the center of the cloud. Most of the young stellar objects are coincident with a filamentary structure of dense gas detected in CS (2 {yields} 1). These observations show that the main body of G216 is actively forming stars, although at a low stellar density comparable to that found in the Taurus cloud.},
doi = {10.1088/0004-6256/137/4/4072; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21269238},
journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 4,
volume = 137,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2009},
month = {Wed Apr 15 00:00:00 EDT 2009}
}