FIRST SCIENCE OBSERVATIONS WITH SOFIA/FORCAST: PROPERTIES OF INTERMEDIATE-LUMINOSITY PROTOSTARS AND CIRCUMSTELLAR DISKS IN OMC-2

Journal Article · Fri Apr 20 04:00:00 EDT 2012 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/749/2/L24· OSTI ID:22047908

Adams, Joseph D; Herter, Terry L; Gull, George E; Henderson, Charles P; Schoenwald, Justin; Stacey, Gordon ^[1]; Osorio, Mayra; Macias, Enrique ^[2]; Thomas Megeath, S; Fischer, William J ^[3]; Ali, Babar ^[4]; Calvet, Nuria ^[5]; D'Alessio, Paola ^[6]; De Buizer, James M; Shuping, Ralph Y ^[7]; Keller, Luke D ^[8]; Morris, Mark R ^[9]; Remming, Ian S ^[10]; Stanke, Thomas ^[11]; Stutz, Amelia ^[12] ; others, and

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1. Department of Astronomy, Cornell University, Space Sciences Bldg., Ithaca, NY 14853 (United States)
2. Instituto de Astrofisica de Andalucia, CSIC, Camino Bajo de Huetor 50, E-18008 Granada (Spain)
3. Department of Physics and Astronomy, University of Toledo, Mailstop 111, 2801 West Bancroft Street, Toledo, OH 43606 (United States)
4. NHSC/IPAC/Caltech, 770 South Wilson Avenue, Pasadena, CA 91125 (United States)
5. Department of Astronomy, University of Michigan, 825 Dennison Building, 500 Church St, Ann Arbor, MI 48109 (United States)
6. Centro de Radioastronomia y Astrofisica, Universidad Nacional Autonoma de Mexico, 58089 Morelia, Michoacan (Mexico)
7. SOFIA-University Space Research Association, NASA Ames Research Center, Mail Stop N211-3, Moffett Field, CA 94035 (United States)
8. Ithaca College, Physics Department, 264 Ctr for Natural Sciences, Ithaca, NY 14850 (United States)
9. Department of Physics and Astronomy, University of California, Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90095-1547 (United States)
10. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States)
11. ESO, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei Muenchen (Germany)
12. Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany)

We examine eight young stellar objects in the OMC-2 star-forming region based on observations from the SOFIA/FORCAST early science phase, the Spitzer Space Telescope, the Herschel Space Observatory, Two Micron All Sky Survey, Atacama Pathfinder Experiment, and other results in the literature. We show the spectral energy distributions (SED) of these objects from near-infrared to millimeter wavelengths, and compare the SEDs with those of sheet collapse models of protostars and circumstellar disks. Four of the objects can be modeled as protostars with infalling envelopes, two as young stars surrounded by disks, and the remaining two objects have double-peaked SEDs. We model the double-peaked sources as binaries containing a young star with a disk and a protostar. The six most luminous sources are found in a dense group within a 0.15 Multiplication-Sign 0.25 pc region; these sources have luminosities ranging from 300 L{sub Sun} to 20 L{sub Sun }. The most embedded source (OMC-2 FIR 4) can be fit by a class 0 protostar model having a luminosity of {approx}50 L{sub Sun} and mass infall rate of {approx}10{sup -4} M{sub Sun} yr{sup -1}.

• OSTI ID: 22047908
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 749; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTRONOMY
ASTROPHYSICS
BINARY STARS
COMPARATIVE EVALUATIONS
EMISSION SPECTROSCOPY
ENERGY SPECTRA
INFRARED SPECTRA
LUMINOSITY
MASS
PROTOPLANETS
PROTOSTARS
RADIANT HEAT TRANSFER
STAR EVOLUTION
STAR MODELS
STARS
TELESCOPES
WAVELENGTHS