COSMIC ORIGINS SPECTROGRAPH OBSERVATIONS OF TRANSLUCENT CLOUDS: Cyg OB2 8A

Journal Article · Fri Sep 10 00:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/720/2/L190· OSTI ID:21452819

Snow, Theodore P; Destree, Joshua D; Burgh, Eric B; Ferguson, Ryan M; Danforth, Charles W ^[1]; Cordiner, Martin ^[2]

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1. Department of Astrophysical and Planetary Sciences, Center for Astrophysics and Space Astronomy, University of Colorado at Boulder, Campus Box 389, Boulder, CO 80309-0389 (United States)
2. The Goddard Center for Astrobiology, NASA Goddard Space Flight Center, Code 691, 8800 Greenbelt Road, Greenbelt, MD 20771 (United States)

Data from the Cosmic Origins Spectrograph (COS) are presented for the first highly reddened target (Cyg OB2 8A) under the COS Science Team's guaranteed time allocation. Column densities of ionic, atomic, and molecular species are reported and implications are discussed. Data from Cyg OB2 8A demonstrate the ability to analyze highly reddened interstellar sight lines with the COS that were unavailable to previous UV instruments. Measured column densities indicate that the Cyg OB2 8A line of sight contains multiple diffuse clouds rather than a dominant translucent cloud.

• OSTI ID: 21452819
• Journal Information: Astrophysical Journal Letters, Vol. 720, Issue 2; Other Information: DOI: 10.1088/2041-8205/720/2/L190; ISSN 2041-8205
• Country of Publication: United States
• Language: English

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