OBSERVATIONS OF FAR-ULTRAVIOLET DIFFUSE EMISSION FROM THE SMALL MAGELLANIC CLOUD

Journal Article · Sat Dec 10 04:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/743/1/80· OSTI ID:22004494

Pradhan, Ananta C; Murthy, Jayant ^[1]; Pathak, Amit ^[2]

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1. Indian Institute of Astrophysics, Bangalore 560 034 (India)
2. Present address: Department of Physics, Tezpur University, Tezpur 784 028 (India)

We report the first observations of far-ultraviolet (FUV: 1000-1150 A) diffuse radiation from the Small Magellanic Cloud (SMC) using observations from the Far-Ultraviolet Spectroscopic Explorer. The strength of FUV diffuse surface brightness in the SMC ranges from the detection limit of 2000 photons cm{sup -2} s{sup -1} sr{sup -1} A{sup -1} to a maximum of 3 Multiplication-Sign 10{sup 5} photons cm{sup -2} s{sup -1} sr{sup -1} A{sup -1} at 1004 A. The contribution of diffuse emission to the total radiation field was found to be 34% at 1004 A to 44% at 1117 A with a maximum observed uncertainty of 30%. There is a striking difference between the FUV diffuse fraction from the SMC and the Large Magellanic Cloud with the SMC fraction being higher probably because of the higher dust albedo. The FUV diffuse emission correlates with H{alpha} emission in the H II regions of the SMC.

• OSTI ID: 22004494
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 743; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ALBEDO
ASTROPHYSICS
BRIGHTNESS
DUSTS
FAR ULTRAVIOLET RADIATION
MAGELLANIC CLOUDS
PHOTONS