A New Luminous Blue Variable in M31

被引：9

作者：

Humphreys, Roberta M. ^{[1
]}

Martin, John C. ^{[2
]}

Gordon, Michael S. ^{[1
]}

机构：

[1] Univ Minnesota, Minnesota Inst Astrophys, Minneapolis, MN 55455 USA

[2] Univ Illinois, Barber Observ, Springfield, IL 62703 USA

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 2015年 / 127卷 / 950期

基金：

美国国家科学基金会;

关键词：

CURRENTLY FORMING STARS; FIBER-FED SPECTROGRAPH; EMISSION-LINE STARS; ANDROMEDA GALAXY; SUPERGIANTS; PHOTOMETRY; HECTOSPEC;

D O I：

10.1086/681013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the fifth confirmed Luminous Blue Variable/S Doradus variable in M31. In 2006, J004526.62+415006.3 had the spectrum of hot Fe II emission line star with strong P Cygni profiles in the Balmer lines. In 2010, its absorption line spectrum resembled an early A-type supergiant with H and Fe II emission lines with strong P Cygni profiles, and in 2013, the spectrum had fully transitioned to an F-type supergiant due to the formation of the optically thick, cool wind which characterizes LBVs at maximum light. The photometric record supports the LBV/S Doradus nature of the variability. Its bolometric luminosity of similar to - 9.65 mag places it on the H-R diagram near the known LBVs, AE And, Var C in M33, and S Dor.

引用

页码：347 / 350

页数：4

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