ADC/CDS Standard Document for Catalog:
/journal_tables/ApJ/516/693/

1. Use the ADC Data Viewer Suite to visualize the data.
2. Get the data files via anonymous FTP. (See Note.)

J/ApJ/516/693   Mass-to-light ratio of binary galaxies     (Honma, 1999)
================================================================================
The mass-to-light ratio of binary galaxies
    Honma M.
   <Astrophys. J. 516, 693 (1999)>
   =1999ApJ...516..693H
================================================================================
ADC_Keywords: Galaxies, nearby ; Surveys
Keywords: galaxies: fundamental parameters - galaxies: kinematics and dynamics

Abstract:
    We report on the mass-to-light ratio determination based on a newly
    selected binary galaxy sample, which includes a large number of pairs
    whose separations exceed a few hundred kpc. The probability
    distributions of the projected separation and the velocity difference
    have been calculated considering the contamination of optical pairs,
    and the mass-to-light (M/L) ratio has been determined based on the
    maximum likelihood method. The best estimate of the M/L in the B band
    for 57 pairs is found to be 28 - 36 depending on the orbital
    parameters and the distribution of optical pairs (solar unit: H_o_ =
    50 km s^-1^ Mpc^-1^). The best estimate of the M/L for 30 pure spiral
    pairs is found to be 12 - 16. These results are relatively smaller
    than those obtained in previous studies but are consistent with each
    other within the errors. Although the number of pairs with large
    separation is significantly increased compared with previous samples,
    the M/L does not show any tendency of increase but is found to be
    almost independent of the separation of pairs beyond 100 kpc. The
    constancy of the M/L beyond 100 kpc may indicate that the typical halo
    size of spiral galaxies is less than 100 kpc.

See also:

File Summary:
--------------------------------------------------------------------------------
 FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe            80        .   This file
table1.dat        96      114   Data for 57 pairs in the sample
--------------------------------------------------------------------------------

See also:
   J/A+AS/110/371 : Southern binary galaxies. I. (Soares+, 1995)
   J/A+AS/125/329 : Southern binary galaxies radial velocities (de Souza+ 1997)
   J/A+A/309/749  : Fundamental plane of early type galaxies (Prugniel+ 1996)

Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
   Bytes Format Units     Label     Explanations
--------------------------------------------------------------------------------
   1- 16  A16   ---       Name      Galaxy Name
  19- 34  A16   ---       Pair      The galaxy paired with Name
  37- 45  F9.5  deg       GLON      Galactic longitude
  47- 55  F9.5  deg       GLAT      Galactic latitude
  57- 60  I4    km/s      Vel       Redshift velocity
  62- 64  I3    km/s    e_Vel       Uncertainty in Vel
  66- 69  A4    ---       MType     Galactic morphological type
  71- 74  F4.1  mag       Bmag      B band magnitude
  76- 80  F5.1  kpc       LCSep     Luminosity-corrected separation
  83- 87  F5.1  km/s      LCVel     Luminosity-corrected velocity difference
  89- 95  F7.3  Sun       M/L       Mass to light ratio
--------------------------------------------------------------------------------

History:
    From ApJ Electronic edition

================================================================================
(End)                                          Greg Schwarz [AAS]    06-Mar-2000