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The Relationship Between Gas and Cirrus Dust Filaments at the Edge of the Expanding Shell in Eridanus

Published online by Cambridge University Press:  08 February 2017

G. L. Verschuur ,
F. Verter ,
L. J. Rickard  and
D. T. Leisawitz
G. L. Verschuur
Affiliation:
Unaffiliated, USA
F. Verter
Affiliation:
Laboratory for Astronomy Goddard Space Flight Center, USA
L. J. Rickard
Affiliation:
Naval Research Laboratory, USA
D. T. Leisawitz
Affiliation:
Laboratory for Astronomy Goddard Space Flight Center, USA

Abstract

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At the boundary of a large expanding shell in Eridanus around l = 187°, b = −50° the morphology observed in the HI emission is well mimicked by the 100 μm surface brightness but with associated structures offset by as much as 0.°5. A point-to-point comparison between I100μm and NHI in filaments of neutral hydrogen and dust (IR cirrus) produces only a weak dependence. However, when I100μm at a cirrus dust peak is compared with NHI at the associated H i peak, a relationship closer to that reported by other workers is found. Preliminary CO observations have set low limits on the molecular gas in these filaments. Since the H i and dust in our region are associated with a large expanding shell (or superbubble), shocks may be responsible for separation of gas and dust. The existence of small-scale structure in both the HI and IR is noted. We conclude that attempts to correlate HI and IR must invoke high-resolution area surveys.

Type
III. Diffuse Galactic Radiation from Dust and Gas: Observations and Models
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 235 - 236
Copyright
Copyright © Kluwer 1990 

References

REFERENCES

Deul, E. 1988, Ph. D. dissertation, University of Leiden.Google Scholar
de Geus, E. 1988, Ph. D. dissertation, University of Leiden.Google Scholar
Reynolds, R. J. and Ogden, P. M. 1979, Ap. J., 229, 942.CrossRefGoogle Scholar
Verschuur, G. L. 1973, Astron. J., 78, 573. (A +4 minute correction must be applied to the right ascension scale of the H I contour maps in this paper.) CrossRefGoogle Scholar
de Vries, H. W., Heithausen, A., and Thaddeus, P. 1987, Ap. J., 319, 723.CrossRefGoogle Scholar