Near-infrared CO emission in young stellar objects

Journal Article · Sun Oct 01 00:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167927· OSTI ID:5096353

Carr, J S ^[1]

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1. McDonald Observatory, Austin, TX (USA)

Near-infrared spectra for 40 young stellar objects were analyzed in order to search for CO overtone emission at 2.3 microns. CO bands were identified in the emission of nine sources, suggesting that about 20 percent of young stellar objects with outflows have CO vibrational band emission. Results show that an accretion disk can produce the observed CO band-head fluxes with accretion rates of 10 to the -8th to a few 10 to the -7th solar masses/yr. Under the assumptions of a neutral stellar wind with a velocity of 100-300 km/s, a cool gas, and carbon predominantly in the form of CO, mass loss rates ranging from a few 10 to the -7th solar masses/yr to a few 10 to the -5th solar masses/yr are required to fit the observed CO flux. 64 refs.

• OSTI ID: 5096353
• Journal Information: Astrophysical Journal; (USA), Vol. 345; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
PROTOSTARS
INFRARED SPECTRA
ACCRETION DISKS
CARBON MONOXIDE
EMISSION SPECTRA
GAS FLOW
LUMINOSITY
MASS
NEAR INFRARED RADIATION
STAR ACCRETION
STAR MODELS
STELLAR RADIATION
STELLAR WINDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
FLUID FLOW
INFRARED RADIATION
MATHEMATICAL MODELS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA
STAR EVOLUTION
STELLAR ACTIVITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources