SIMBAD references

2000ApJ...541..250B - Astrophys. J., 541, 250-256 (2000/September-3)

On the correlation between CO absorption and far-ultraviolet nonlinear extinction toward galactic OB stars.

BURGH E.B., McCANDLISS S.R., ANDERSSON B.-G. and FELDMAN P.D.

Abstract (from CDS):

A sample of 59 sight lines to reddened Galactic OB stars was examined for correlations of the strength of the CO Fourth Positive (A1Π-X1Σ+) 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 with parametric fits of the extinction curves from the literature. A strong correlation with the nonlinear 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 nonlinear curvature are discussed.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - ISM: Abundances - ISM: Molecules - Ultraviolet: ISM

Simbad objects: 59

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