SCYON Abstract

Received on November 10 2006

The Spitzer c2d Survey of Nearby Dense Cores: IV. Revealing the Embedded Cluster in B59

AuthorsTimothy Y. Brooke (1), Tracy L. Huard (2), Tyler L. Bourke (2), A.C. Adwin Boogert (1,14), Lori E. Allen (2), Geoffrey A. Blake (3), Neal J. Evans, II (4), Paul M. Harvey (4), David W. Koerner (5), Lee G. Mundy (6), Philip C. Myers (2), Deborah L. Padgett (7), Anneila I. Sargent (1), Karl R. Stapelfeldt (8), Ewine F. van Dishoeck (9), Nicholas Chapman (6), Lucas Cieza (4), Michael M. Dunham (4), Shih-Ping Lai (6,12,13), Alicia Porras (2), William Spiesman (4), Peter J. Teuben (6), Chadwick H. Young (10), Zahed Wahhaj (5), and Chang Won Lee (11)
Affiliation
(1) Department of Astronomy, Caltech
(2) SAO
(3) Department of Geological and Planetary Sciences, Caltech
(4) Department of Astronomy, University of Texas
(5) Department of Physics and Astronomy, Northern Arizona University
(6) Department of Astronomy, University of Maryland
(7) Spitzer Science Center
(8) Jet Propulsion Laboratory
(9) Leiden Observatory
(10) Department of Physical Sciences, Nicholls State University
(11) Korea Astronomy and Space Science Institute
(12) Institute of Astronomy and Department of Physics, National Tsing Hua University
(13) Academia Sinica Institute of Astronomy and Astrophysics
(14) NOAO Gemini Science Center

Accepted byAstrophysical Journal
Contact
URLhttp://arXiv.org/abs/astro-ph/0610797
Links

Abstract

Infrared images of the dark cloud core B59 were obtained with the Spitzer Space Telescope as part of the "Cores to Disks" Legacy Science project. Photometry from 3.6-70 microns indicates at least 20 candidate low-mass young stars near the core, more than doubling the previously known population. Out of this group, 13 are located within roughly 0.1 pc in projection of the molecular gas peak, where a new embedded source is detected. Spectral energy distributions span the range from small excesses above photospheric levels to rising in the mid-infrared. One other embedded object, probably associated with the millimeter source B59-MMS1, with a bolometric luminosity L(bol) roughly 2 L(sun), has extended structure at 3.6 and 4.5 microns, possibly tracing the edges of an outflow cavity. The measured extinction through the central part of the core is A(V) greater than of order 45 mag. The B59 core is producing young stars with a high efficiency.