J/A+A/514/A59 uvbyβ photometry in Carina. II (Kaltcheva+, 2010)
The Carina spiral feature: Stroemgren-β photometry approach.
II. Distances and space distribution of the O and B stars
Kaltcheva N., Scorcio M.
<Astron. Astrophys. 514, A59 (2010)>
=2010A&A...514A..59K 2010A&A...514A..59K
ADC_Keywords: Stars, early-type; Photometry, uvby, beta ; Stars, distances
Keywords: Galaxy: structure - stars: distances -
open clusters and associations: general
Abstract:
In recent years a significant development has become evident in
the study of the stellar structure of the Galactic disk. This is
especially true for the 3rd Galactic quadrant, where the stellar
population was extensively investigated beyond 10kpc, revealing
details about the warped geometry of the thin and thick disks and
outer arm. The 4th Galactic quadrant offers even better opportunity
to follow the distribution of the young stellar populace to a large
distance, since the line of sight is parallel to the largest single
segment of a spiral arm seen from our position in the Galaxy: the
Carina spiral feature. This paper further contributes to the study of
the structure of the Galactic disk in the direction of Carina field
utilizing homogeneous photometric distances of a sample of about 600
bright early-type stars seen in this direction up to 6kpc.
The derived stellar distances are based on uvbyβ photometry. All
O and B type stars with uvbyβ data presently available are
included in the study.
Description:
Our sample consists of about 600 stars earlier than A0 spectral
type with available uvbyβ photometry listed in at least one of the
HD, CPD, PPM and LS catalogs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 132 546 Photometry-derived information for 546 stars in
the sample
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See also:
J/A+AS/146/365 : O + B stars uvby-Hbeta photometry. III. (Kaltcheva+, 2000)
J/A+A/410/523 : Carina Spiral Feature ubvybeta photometry (Kaltcheva, 2003)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Group Luminosity class group (1)
18- 30 A13 --- Name Star name
32- 44 A13 --- SpType MK spectral type
46- 50 F5.2 mag Vmag Standard Johnson magnitude
52- 56 F5.2 mag b-y Stroemgren b-y colour index
58- 62 F5.2 mag m1 Stroemgren m1 index
64- 68 F5.2 mag c1 Stroemgren c1 index
70- 73 F4.2 mag Hbeta Stroemgren Hβ index
75- 80 F6.3 mag (b-y)0 Stroemgren b-y colour index corrected for
reddening
82- 87 F6.3 mag c0 Stroemgren c1 index corrected for reddening
89- 93 F5.3 mag m0 Stroemgren m1 index corrected for reddening
95-100 F6.3 mag E(b-y) b-y colour excess
102-107 F6.3 mag V0mag Standard Johnson magnitude corrected for
reddening
109-114 F6.2 deg GLON Galactic longitude
116-120 F5.2 deg GLAT Galactic latitude
122-126 F5.1 mag VMAG Absolute V magnitude
128-132 I5 pc Dist Distance from the Sun
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Note (1): Luminosity class groups are: Ia ; Iab ; Iab/Ib, Ib ;
Ib/II, II ; II/III, III ; III/IV, IV, IV/V
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Acknowledgements:
Nadia Kaltcheva, kaltchev(at)uwosh.edu
References:
Kaltcheva, Paper I 2003A&A...410..523K 2003A&A...410..523K, Cat. J/A+A/410/523
(End) Patricia Vannier [CDS] 28-May-2010