The Optical and Near-Infrared Counterpart of IRAS 18476+2054

Details The Optical and Near-Infrared Counterpart of IRAS 18476+2054 The Optical and Near-Infrared Counterpart of IRAS 18476+2054

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxaa..39...35k&link_type=abstract

Revista Mexicana de Astronomía y Astrofísica Vol. 39, pp. 35-40 (2003) (http://www.astroscu.unam.mx/~rmaa/)

Astronomy and Astrophysics

Astronomy

2

Infrared: Stars, Stars: Agb And Post-Agb, Stars: Individual (Iras 18476+2054)

Scientific paper

We present here, for the first time, an optical and near-infrared (NIR) identification for the previously unstudied IRAS PSC source 18476+2054. Direct imaging in BVRICiJKs and optical spectroscopy were obtained. The optical counterpart is identified as a variable star of Mira class--M7 or later giant or supergiant--with a mid infrared excess compared to ``normal'' Miras having such a short period. The (V-IC) is remarkably high, although the (B-V) gives no indication for circumstellar extinction driving a reddening. The V-[12] color shows a mid-infrared excess. The photometries obtained here and the sky survey plates allow us to estimate a period of 145 days and an unusually low amplitude for such a late spectroscopic type of ΔV = 2m.5+/-0m.2.

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