Access to Astronomical Catalogues

J/ApJ/671/1708      Hypervelocity stars. III                 (Brown+, 2007)
Hypervelocity stars.
III. The space density and ejection history of main-sequence stars from the
Galactic Center.
    Brown W.R., Geller M.J., Kenyon S.J., Kurtz M.J., Bromley B.C.
   <Astrophys. J., 671, 1708-1716 (2007)>
   =2007ApJ...671.1708B
ADC_Keywords: Surveys ; Galaxies, nearby ; Radial velocities ; Photometry, SDSS

Keywords: Galaxy: center - Galaxy: halo - Galaxy: kinematics and dynamics -
          Galaxy: stellar content - stars: early-type

Abstract:
    We report the discovery of three new unbound hypervelocity stars
    (HVSs), stars travelling with such extreme velocities that dynamical
    ejection from a massive black hole (MBH) is their only suggested
    origin. We also detect a population of possibly bound HVSs.

Description:
    New observations of faint HVS candidates were obtained at the 6.5m
    MMT telescope with the MMT Blue Channel spectrograph on the nights of
    2006 December 21-26, 2007 March 18-20, and 2007 May 14-18.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        80       10   Hypervelocity stars
table2.dat        71      381   HVS Survey: New observations


See also:
    J/ApJ/647/303 : Spectroscopic survey of hypervelocity stars (Brown+, 2006)
    J/ApJ/660/311 : Hypervelocity stars. II. (Brown+, 2007)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  3  A3    ---     ---       [HVS]
   4-  5  I2    ---     HVS       HVS number, [BGK2006] HV N in Simbad
   7-  9  A3    ---     SpT       Spectral type (B or sdO)
  11- 14  F4.1  mag     VMAG      V-band Absolute magnitude
  16- 20  F5.2  mag     Vmag      V-band apparent magnitude
  22- 24  I3    kpc     Rgc       Galactocentric distance
  26- 31  F6.2  deg     Glon      Galactic longitude
  33- 38  F6.2  deg     Glat      Galactic latitude
  40- 43  I4    km/s    Vhel      Heliocentric velocity
  45- 48  I4    km/s    Vrf       Rest frame (galactocentric) velocity
  50- 52  I3    Myr     tGC       Travel time from the Galactic Center
  54- 77  A24   ---     Name      Name of the star
      80  A1    ---     r_Name    Reference (1)

Note (1): References are numbered as follows:
      1 = Brown et al. (2005ApJ...622L..33B)
      2 = Hirsch et al. (2005A&A...444L..61H)
      3 = Edelmann et al. (2005ApJ...634L.181E)
      4 = Brown et al. (2006ApJ...640L..35)
      5 = Brown et al.  (2006, Cat. J/ApJ/647/303)


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

   Bytes Format Units   Label     Explanations

   1-  2  I2    h       RAh       Hour of Right Ascension (J2000)
   4-  5  I2    min     RAm       Minute of Right Ascension (J2000)
   7- 11  F5.2  s       RAs       Second of Right Ascension (J2000)
      13  A1    ---     DE-       Sign of the Declination (J2000)
  14- 15  I2    deg     DEd       Degree of Declination (J2000)
  17- 18  I2    arcmin  DEm       Arcminute of Declination (J2000)
  20- 23  F4.1  arcsec  DEs       Arcsecond of Declination (J2000)
  25- 30  F6.3  mag     g'mag     The g' band magnitude
  32- 36  F5.3  mag     e_g'mag   Uncertainty in g'mag
  38- 42  F5.3  mag     (u'-g')0  The intrinsic (u'-g') color index
  44- 48  F5.3  mag   e_(u'-g')0  Uncertainty in (u'-g')0
  50- 55  F6.3  mag     (g'-r')0  The intrinsic (g'-r') color index
  57- 61  F5.3  mag   e_(g'-r')0  Uncertainty in (g'-r')0
      63  I1    ---     WD        [0/1] code 1=White Dwarf, 0=B-type star
  65- 68  I4    km/s    HV        Heliocentric velocity
  70- 71  I2    km/s    e_HV      Uncertainty in HV


History:
    From electronic version of the journal
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    08-Sep-2008