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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
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) 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:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        84      189   SA94 proper-motion stars, µ>0.1arcsec/yr


See also:
    I/98 : NLTT Catalogue (Luyten, 1979)
    I/87 : LHS Catalogue, 2nd Edition (Luyten 1979)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units     Label     Explanations

   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)

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


History:
    From electronic version of the journal
(End)                         James Marcout, Patricia Bauer [CDS]    23-Mar-2001