SIMBAD references

2009MNRAS.395.1121K - Mon. Not. R. Astron. Soc., 395, 1121-1126 (2009/May-2)

Discovery of the first symbiotic star in NGC6822.

KNIAZEV A.Y., VAISANEN P., WHITELOCK P.A., MENZIES J.W., FEAST M.W., GREBEL E.K., BUCKLEY D.A.H., HASHIMOTO Y., LOARING N., ROMERO-COLMENERO E., SEFAKO R., BURGH E.B. and NORDSIECK K.

Abstract (from CDS):

We report the discovery of the first symbiotic star (V = 21.6, KS = 15.8mag) in the Local Group dwarf irregular galaxy NGC6822. This star was identified during a spectral survey of Hα emission-line objects using the Southern African Large Telescope during its performance-verification phase. The observed strong emission lines of Hi and Heii suggest a high electron density and T* < 130000K for the hot companion. The infrared colours allow us to classify this object as an S-type symbiotic star, comprising a red giant losing mass to a compact companion. The red giant is an asymptotic giant branch (AGB) carbon star, and a semiregular variable, pulsating in the first overtone with a period of 142 d. Its bolometric magnitude is Mbol= -4.4mag.

We review what is known about the luminosities of extragalactic symbiotic stars, showing that most, possibly all, contain AGB stars. We suggest that a much larger fraction of Galactic symbiotic stars may contain AGB stars than was previously realized.


Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): binaries: symbiotic - stars: mass-loss - galaxies: individual: NGC6822

Nomenclature: Text: [KVW2009] NGC 6822 SySt-1 N=1.

CDS comments: The symbiotic star NGC 6822 SySt-1 = LGGS J194453.88-145146.6

Simbad objects: 16

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2021.05.15-16:48:24

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