J/PASP/108/772 uvby-β photometry of A and F southern stars (Perry+, 1996)
Interstellar reddening in the southern hemisphere.
II. Analysis of the uvby-β observations.
Perry C.L., Christodoulou D.M.
<Publ. Astron. Soc. Pac. 108, 772 (1996)>
=1996PASP..108..772P 1996PASP..108..772P
ADC_Keywords: Stars, A-type ; Stars, F-type ; Photometry, uvby, beta
Abstract:
Photometric color excesses and distances plus heliocentric coordinates
are calculated for 3762 southern A and early-F stars. The present
results, combined with those previously published for the Northern
Hemisphere, complete the coverage of the spatial distribution of
interstellar reddening in the entire solar neighborhood. The new
reddening maps show that the interstellar matter within 300pc of the
Sun forms a single very large cloud complex that is somewhat
asymmetrical with respect to both the galactic center and the galactic
plane. This complex is characterized by pronounced local
irregularities in both density and spatial extent. The observations
further indicate that (1) the cloud complex is not associated with
Gould's belt; (2) there exist large regions of the sky devoid of dust;
(3) interstellar reddening is negligible at the galactic poles; (4)
the role of intercloud dust in the Southern Hemisphere is minor
although more important than in the Northern Hemisphere; (5) the Sun
is not located in a dust-free, spherically symmetric bubble as
previously thought; and (6) the Sun is, however, located in an
elongated dust-free region known as the "local trough."
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 3762 Catalog of dereddened uvby colors and computational
data for southern A and F stars
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See also:
J/other/SAAOC/15.53 : Southern reddened luminous stars. II. (Kilkenny 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD (Cat. III/135) number
8- 13 F6.3 mag E(b-y) (b-y) colour excess
14- 18 F5.2 mag V0mag Dereddened V magnitude
19- 24 F6.3 mag (b-y)0 Dereddened Stroemgren (b-y) colour index
26- 30 F5.3 mag m0 Dereddened Stroemgren m0 magnitude
31- 36 F6.3 mag c0 Dereddened Stroemgren c0 colour index
38- 42 F5.2 [Sun] [Fe/H] ? Metallicity
43- 47 F5.2 mag VMAG Absolute V magnitude
49- 51 I3 pc r Distance from the Sun
53- 56 I4 pc x x coordinate (toward galactic rotation)
58- 61 I4 pc y y coordinate (toward galactic anticenter)
62- 66 I5 pc z z coordinate (toward North galactic pole)
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History: Prepared via OCR at CDS.
References:
Perry, Paper I 1991PASP..103..494P 1991PASP..103..494P
(End) James Marcout, Patricia Bauer [CDS] 06-Apr-2000