The Spitzer c2d survey of large, nearby, interstellar clouds. VIII. Serpens observed with MIPS

Paul M. Harvey, Luisa M. Rebull, Tim Brooke, William J. Spiesman, Nicholas Chapman, Tracy L. Huard, Neal J. Evans, Lucas Cieza, Shih Ping Lai, Lori E. Allen, Lee G. Mundy, Deborah L. Padgett, Anneila I. Sargent, Karl R. Stapelfeldt, Philip C. Myers, Ewine F. Van Dishoeck, Geoffrey A. Blake, David W. Koerner

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


We present maps of 1.5 deg2 of the Serpens dark cloud at 24, 70, and 160 μm observed with the Spitzer Space Telescope MIPS camera. We describe the observations and briefly discuss the data processing carried out by the c2d team on these data. More than 2400 compact sources have been extracted at 24 μm, nearly 100 at 70 μm, and four at 160 μm. We estimate completeness limits for our 24 μm survey from Monte Carlo tests with artificial sources inserted into the Spitzer maps. We compare source counts, colors, and magnitudes in the Serpens cloud to two reference data sets: a 0.50 deg2 set on a low-extinction region near the dark cloud, and a 5.3 deg2 subset of the SWIRE ELAIS N1 data that was processed through our pipeline. These results show that there is an easily identifiable population of young stellar object candidates in the Serpens cloud that is not present in either of the reference data sets. We also show a comparison of visual extinction and cool dust emission illustrating a close correlation between the two and find that the most embedded YSO candidates are located in the areas of highest visual extinction.

Original languageEnglish (US)
Pages (from-to)1139-1148
Number of pages10
JournalAstrophysical Journal
Issue number2 I
StatePublished - Jul 10 2007


  • Infrared: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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