J/MNRAS/414/3492 JHKs photometry of Sculptor dSph galaxy (Menzies+, 2011)
Asymptotic giant branch stars in the Sculptor dwarf spheroidal galaxy.
Menzies J.W., Feast M.W., Whitelock P.A., Matsunaga N.
<Mon. Not. R. Astron. Soc., 414, 3492-3500 (2011)>
=2011MNRAS.414.3492M 2011MNRAS.414.3492M
ADC_Keywords: Galaxies, nearby ; Photometry, infrared
Keywords: stars: AGB and post-AGB - stars: carbon -
galaxies: individual: Sculptor- Local Group -
galaxies: stellar content
Abstract:
JHKs photometry is presented for a 35 arcmin2 field centred on the
Sculptor dwarf spheroidal galaxy. With the aid of published kinematic
data definite galaxy members are identified and the width in J-K of
the colour-magnitude diagram is shown to be consistent with an old
population of stars with a large range in metal abundance. We identify
two Asymptotic Giant Branch variables, both carbon Miras, with periods
of 189 and 554d, respectively, and discuss their ages, metallicities
and mass-loss as well as their positions in the Mira period-luminosity
diagram. There is evidence for a general period-age relation for Local
Group Miras. The mass-loss rate for the 554d variable, MAG29, appears
to be consistent with that found for Miras of comparable period in
other Local Group galaxies.
Description:
Observations were made with the SIRIUS camera on the Japanese-South
African Infrared Survey Facility (IRSF) at SAAO, Sutherland.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 1849 JHKs for stars in Sculptor (for 1797 stars)
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See also:
J/AJ/110/2747 : Stars in Sculptor dwarf spheroidal galaxy (Schweitzer+ 1995)
J/AJ/130/1065 : Sculptor dwarf spheroidal galaxy members (Coleman+, 2005)
J/AJ/131/375 : Sculptor dSph giants photometry & velocities (Westfall+, 2006)
J/AJ/137/3100 : Radial velocities of 4 dSph galaxies (Walker+, 2009)
J/ApJ/705/328 : Abundance measurements in Sculptor dSph (Kirby+, 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Mmb Membership code (1)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 14 F4.1 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 24 I2 arcsec DEs Declination (J2000)
26- 30 I5 --- Scl Our internal unique number for stars measured
32- 36 F5.2 mag Jmag J magnitude
38- 42 F5.2 mag Hmag H magnitude
44- 48 F5.2 mag Ksmag Ks magnitude
50- 54 F5.2 mag J-Ks J-Ks colour index
56- 67 A12 --- r_Mmb Membership reference (2)
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Note (1): Membership information as follows:
M = Members
Mle = Members - larger errors
NM = Non-members
UM = Unknown membership
Note (2): Membership reference as follows:
B = Battaglia et al. (2008ApJ...681L..13B 2008ApJ...681L..13B)
C = Coleman et al. (2005, Cat. J/AJ/130/1065)
K = Kirby et al. (2009, Cat. J/ApJ/705/328)
S = Schweitzer et al. (1995, Cat. J/AJ/110/2747)
Wa = Walker et al. (2009, Cat. J/AJ/137/3100)
We = Westfall et al. (2006, Cat. J/AJ/131/375)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Feb-2012