Back to Search
Start Over
Absorption features in the 5-8 micron spectra of protostars
- Source :
- Astrophysical Journal, Part 1. 287
- Publication Year :
- 1984
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1984.
-
Abstract
- High signal-to-noise ratio spectra in the range of 5-8 microns of four sources embedded in molecular clouds are examined using low-temperature laboratory measurements of the 5-8-micron spectra of simple molecules and their mixtures. The absorption, apparent in all four sources, is characterized by highly distinct features ranging from two relatively narrow bands at 6.0 and 6.8 microns in W33A to a broad, shallow, and partially structured feature extending from 5.2 to 7.8 microns in Mon R2-IRS2, BN, and NGC2264. The first feature (W33A) is explained by the OH bending mode in H2O and the CH deformation modes in saturated hydrocarbons; while the second feature (Mon R2-IRS2-type) is explained by the presence of a mixture of saturated and unsaturated hydrocarbons possibly containing strongly electronegative groups.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 287
- Database :
- NASA Technical Reports
- Journal :
- Astrophysical Journal, Part 1
- Publication Type :
- Report
- Accession number :
- edsnas.19850041348
- Document Type :
- Report
- Full Text :
- https://doi.org/10.1086/162728