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On the Correlation Between CO Absorption and Far-Ultraviolet Non-Linear Extinction Toward Galactic OB Stars
- Publication Year :
- 2000
- Publisher :
- arXiv, 2000.
-
Abstract
- A sample of 59 sight lines to reddened Galactic OB stars was examined for correlations of the strength of the CO Fourth Positive (A - X) absorption band system with the ultraviolet interstellar extinction curve parameters. We used archival high-dispersion NEWSIPS IUE spectra to measure the CO absorption for comparison to parametric fits of the extinction curves from the literature. A strong correlation with the non-linear far-UV curvature term was found with greater absorption, normalized to E(B-V), being associated with more curvature. A weaker trend with the linear extinction term was also found. Mechanisms for enhancing CO in dust environments exhibiting high non-linear curvature are discussed.<br />Comment: 10 pages, including 6 figures. LaTeX2e (emulateapj5.sty). To appear in ApJ, Sep 20, 2000
- Subjects :
- Physics
Extinction (astronomy)
Astrophysics (astro-ph)
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Curvature
medicine.disease_cause
Spectral line
Nonlinear system
Stars
Space and Planetary Science
Absorption band
medicine
Absorption (electromagnetic radiation)
Ultraviolet
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f97f3bc1bc779d38a7ae31476b88288f
- Full Text :
- https://doi.org/10.48550/arxiv.astro-ph/0005187