J/MNRAS/318/1206 High proper motion stars in SA 94 (Cooke+, 2000)
High proper motion stars in Kapteyn Selected Area 94.
Cooke J.A., Neill Reid I.
<Mon. Not. R. Astron. Soc. 318, 1206 (2000)>
=2000MNRAS.318.1206C 2000MNRAS.318.1206C
ADC_Keywords: Proper motions ; Stars, dwarfs ; Stars, subdwarf ;
Photometry, UBVRI
Keywords: stars: low-mass, brown dwarfs -
stars: luminosity function, mass function - astrometry/subdwarfs -
Galaxy: structure
Abstract:
We have applied the astrometric techniques devised by Murray
(1986MNRAS.223..649M 1986MNRAS.223..649M) for analysis of 48-inch Schmidt photographic
data to SuperCOSMOS scans of UK Schmidt plates centred on Kapteyn's
Selected Area 94 (RA=2h53m, DE=0°). In this preliminary study, we
combine astrometric data from four short-exposure V-band plates, taken
in 1987 August (2 plates) and 1993 August (2 plates), with BVRI
photometry from sky-limited plate material, to identify stars with
proper motions exceeding 0.1"/yr. This paper discusses the
completeness of the resulting sample and presents spectroscopy of 30
stars with µ>0.2"/yr. Based on the latter observations and the
distribution in the [HV, (V-I)] reduced proper-motion diagram, we
have classified stars in the complete sample as candidate white
dwarfs, main-sequence dwarfs and halo subdwarfs, and derived estimates
of the disc and halo luminosity functions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 84 189 SA94 proper-motion stars, µ>0.1arcsec/yr
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See also:
I/98 : NLTT Catalogue (Luyten, 1979)
I/87 : LHS Catalogue, 2nd Edition (Luyten 1979)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- [CR2000b] Sequential number
8 I1 h RAh Right ascension (J2000)
10- 11 I2 min RAm Right ascension (J2000)
13- 16 F4.1 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19 I1 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 25 I2 arcsec DEs Declination (J2000)
27- 31 F5.2 mag Vmag ? V magnitude
33- 36 F4.2 mag B-V ? B-V colour index
38- 42 F5.2 mag V-I ? V-I colour index
44- 49 F6.3 arcsec/yr pmRA Proper motion in right ascension
51- 56 F6.3 arcsec/yr pmDE Proper motion in declination
58- 62 F5.3 arcsec/yr pm Total proper motion
64- 68 F5.2 mag HV ? Hertzsprung parameter (1)
70- 73 A4 --- Cat Presence in other catalogue
NLTT: Luyten 1979-1980, Cat. I/98
LHS: Luyten 1979, Cat. I/87
75- 84 A10 --- OName Other name (2)
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Note (1): Hertzsprung parameter:
HV = V+5+5log(µ) = MV+5log(VT)-3.38,
where VT is the tangential velocity expressed in km/s.
Note (2): Other names:
-- LP FFFF-NNNN, Cat. I/98
-- LHS NNNNa, Cat. I/87
-- BD +DD NNNNNA, Cat. I/119
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 23-Mar-2001