J/ApJS/118/177 JHK photometry of M31 spiral arm (Kodaira+, 1998)
Near-infrared stellar photometry of the M31 spiral arm around OB association A24
Kodaira K., Miyazaki S., Vansevicius V., Tamura M., Tokunaga A.,
Kobayashi N.
<Astrophys. J. Suppl. Ser. 118, 177 (1998)>
=1998ApJS..118..177K 1998ApJS..118..177K
ADC_Keywords: Galaxies, photometry ; Photometry, infrared ;
Associations, stellar
Keywords: galaxies: individual (M31) - galaxies: photometry -
galaxies: star cluster - infrared: galaxies - stars: AGB and post-AGB
Abstract:
Deep high-resolution JHK images of a 2'x2' field around the OB
association A24 near the 7kpc spiral arm in M31 were measured to yield
photometric data of more than 3000 stars with the faintest magnitude
being J=21.3, H=20.5, and K=19.6. The photometric data for the 1037
stars that are brightest in the K band are presented. Judging from the
color-magnitude and the two-color diagrams, we find that the majority
of the observed stars are AGB stars including large-amplitude
variables. They are distributed smoothly over the observed field, and
we find no clear evidence of varying extinction over the field for
these red stars. The present sample includes bright AGB stars of
MK≤-8 and about 30 young blue objects of (J-H)<0.75 that are
brighter than MJ~=-6.5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 54 1037 List of the 1037 brightest stars in the K band
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See also:
J/ApJ/324/172 : M31 UBVR photometry (Hodge+, 1988)
J/ApJS/98/595 : OB associations in M31 (Hill+ 1995)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [KMV98] Sequential number
5 A1 --- n_[KMV98] [*] Note on [KMV98] (1)
7- 13 F7.4 deg RAdeg Right ascension (J2000.0)
15- 21 F7.4 deg DEdeg Declination (J2000.0)
23- 27 F5.2 mag Jmag ? J magnitude (1.2µm)
29- 32 F4.2 mag e_Jmag ? rms uncertainty on Jmag
34- 38 F5.2 mag Hmag H magnitude (1.6µm)
40- 43 F4.2 mag e_Hmag rms uncertainty on Hmag
45- 49 F5.2 mag Kmag K magnitude (2.2µm)
51- 54 F4.2 mag e_Kmag rms uncertainty on Kmag
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Note (1): *: possible variable star with a difference index δm>0.7
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Acknowledgements: From ApJS electronic version
(End) James Marcout, Patricia Bauer [CDS] 09-Nov-1998