English

Discovery of a New Dusty B[e] Star in the Small Magellanic Cloud

Astrophysics 2014-11-18 v1

Abstract

We present new optical spectroscopic and archival Spitzer IRAC photometric observations of a B-type star in the SMC cluster NGC 346, NGC 346:KWBBe 200. We detect numerous Fe II, [O I], and [Fe II] lines, as well as strong P-Cygni profile H I emission lines in its optical spectrum. The star's near-IR color and optical to IR SED clearly indicate the presence of an infrared excess, consistent with the presence of gas and warm, T ~800 K, circumstellar dust. Based on a crude estimate of the star's luminosity and the observed spectroscopic line profile morphologies, we find that the star is likely to be a B-type supergiant. We suggest that NGC 346:KWBBe 200 is a newly discovered B[e] supergiant star, and represents the fifth such object to be identified in the SMC.

Keywords

Cite

@article{arxiv.0708.1030,
  title  = {Discovery of a New Dusty B[e] Star in the Small Magellanic Cloud},
  author = {John P. Wisniewski and Karen S. Bjorkman and Jon E. Bjorkman and Mark Clampin},
  journal= {arXiv preprint arXiv:0708.1030},
  year   = {2014}
}

Comments

12 pages, accepted by ApJ