Query : 2001A&A...378..449K

2001A&A...378..449K - Astronomy and Astrophysics, volume 378, 449-454 (2001/11-1)

The first known Mira-type variable star in IC 1613.


Abstract (from CDS):

King et al. (1999IAUC.7287R...1K) discovered Nova 1999 in IC 1613 at the Lick Observatory. Both Fugazza et al. (2000IBVS.4942....1F) and Borissova et al. (2000RMxAA..36..151B) questioned this classification, because they were able to detect the star on images obtained in previous years. In infrared frames taken on Oct. 15, 1998, Nova 1999 has (J-K)=1.14 and K=14.69mag. Our light curve study, based primarily on 92 unfiltered Lick images, suggested that the object could be a Mira-type variable with a period of 640.7 days. This period is very close to that obtained by Fugazza et al. (2000IBVS.4942....1F) - 631 days. The star is overluminous with respect to the period-luminosity (PL) relation derived by Feast et al. (1989MNRAS.241..375F) for Mira variables in the LMC. At longer periods (P>400 days), many LMC Miras show such behavior and the PL relation appears to break down. It is possible that the situation in IC 1613 is similar. An optical spectrum obtained with the Keck-II telescope shows features typical of M3Ie or M3IIIe stars. We conclude that the star is a normal long-period M-type Mira variable, the first such star confirmed in IC 1613.

Abstract Copyright:

Journal keyword(s): galaxies: individual: IC 1613 - galaxies: Local Group - galaxies: stellar content - stars: variables: general

CDS comments: The Mira-type variable in IC 1613 is EQ J010448.9+020528.8

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 [AFM2000] V2950-B Mi* 01 04 49.0299312024 +02 05 29.165018316   23.22 21.20     ~ 10 0
2 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1192 2
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16639 1
4 NAME Local Group GrG ~ ~           ~ 7977 0

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