English

Observations of Far-Ultraviolet Diffuse Emission from the Small Magellanic Cloud

Cosmology and Nongalactic Astrophysics 2015-05-30 v1

Abstract

We report the first observations of far-ultraviolet (FUV: 1000 -- 1150 \AA) diffuse radiation from the Small Magellanic Cloud (SMC) using observations from the {\em Far Ultraviolet Spectroscopic Explorer (FUSE)}. The strength of FUV diffuse surface brightness in the SMC ranges from the detection limit of 2000 photons cm2^{-2} s1^{-1} sr1^{-1} \AA1^{-1} to a maximum of 3×1053 \times 10^{5} photons cm2^{-2} s1^{-1} sr1^{-1} \AA1^{-1} at 1004 \AA. The contribution of diffuse emission to the total radiation field was found to be 34% at 1004 \AA to 44% at 1117 \AA 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 (LMC) with the SMC fraction being higher probable because the higher dust albedo. The FUV diffuse emission correlates with Hα\alpha emission in the H {\small II} regions of the SMC.

Keywords

Cite

@article{arxiv.1108.5932,
  title  = {Observations of Far-Ultraviolet Diffuse Emission from the Small Magellanic Cloud},
  author = {Ananta C. Pradhan and Jayant Murthy and Amit Pathak},
  journal= {arXiv preprint arXiv:1108.5932},
  year   = {2015}
}

Comments

Accepted for publication in ApJ

R2 v1 2026-06-21T18:57:08.830Z