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J/MNRAS/411/2596    High Galactic latitude runaway stars     (Silva+, 2011)
Ejection velocities of high Galactic latitude runaway stars.
    Silva M.D.V., Napiwotzki R.
   <Mon. Not. R. Astron. Soc., 411, 2596-2614 (2011)>
   =2011MNRAS.411.2596S
ADC_Keywords: Stars, early-type ; Stars, nearby ; Space velocities

Keywords: stars: early-type - stars: kinematics and dynamics - Galaxy: halo


Abstract:
    We estimate the distribution of ejection velocities for the known
    population of high Galactic latitude runaway stars. The initial sample
    is a collection of 174 early-type stars selected from the literature.
    The stars are first classified according to their evolutionary status
    in order to obtain a homogeneous sample of 96 genuine main-sequence
    stars. Their present velocities and flight times are then estimated
    using proper motion data from various astrometric catalogues
    (including Tycho-2, UCAC2 and USNO-B) and the ejection velocities are
    computed by tracing their orbits back in time, based on a Galactic
    potential. The potential used is constructed from a mass density model
    chosen to fit the most recent observational constraints.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tableb1.dat       95       48   Input data for stars belonging to group A
tableb2.dat       95       48   Input data for stars belonging to group B
refs.dat          79       20   References
tableb3.dat      164       48   Computed values for stars belonging to group A
tableb4.dat      164       48   Computed values for stars belonging to group B


See also:
 J/A+A/331/949   : Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)
 J/A+A/402/801   : Runaway carbon stars of Blanco+McCarthy field 37 (Loup+ 2003)
 J/MNRAS/410/190 : Young runaway stars within 3kpc (Tetzlaff+, 2011)


Byte-by-byte Description of file: tableb1.dat tableb2.dat

   Bytes Format Units     Label     Explanations

   1- 13  A13   ---       Name      Star name
  15- 18  I4    km/s      RV        Radial velocity
  20- 21  I2    km/s      e_RV      rms uncertainty on RV
  23- 24  I2    ---       r_RV      Reference for RV, in refs.dat file
  26- 31  F6.2  mas/yr    pmRA      Proper motion along RA, pmRA*cosDE
  33- 36  F4.2  mas/yr    e_pmRA    rms uncertainty on pmRA
  38- 43  F6.2  mas/yr    pmDE      Proper motion along DE
  45- 48  F4.2  mas/yr    e_pmDE    rms uncertainty on pmDE
  50- 53  F4.2  [cm/s2]   logg      Surface gravity
  55- 58  F4.2  [cm/s2]   e_logg    rms uncertainty on logg
  60- 61  I2    ---       r_logg    Reference for logg, in refs.dat file
  63- 67  I5    K         Teff      Effective temperature
  69- 72  I4    K         e_Teff    rms uncertainty on TEff
  74- 75  I2    ---       r_Teff    Reference for Teff, in refs.dat file
  77- 80  F4.1  Msun      Mass      Mass of the star
  82- 84  F3.1  Msun      E_Mass    Error on Mass (upper value)
  86- 88  F3.1  Msun      e_Mass    Error on Mass (lower value)
  90- 92  I3    km/s      vsini     ? Rotational velocity
      93  A1    ---       u_vsini   [?] Uncertainty flag on vsini
  94- 95  I2    ---       r_vsini   ? Reference for vsini, in refs.dat file


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

   Bytes Format Units   Label     Explanations

   1-  2  I2    ---     Ref       Reference number
   4- 22  A19   ---     BibCode   BibCode
  24- 43  A20   ---     Aut       Author's name
  45- 79  A35   ---     Com       Comments


Byte-by-byte Description of file: tableb3.dat tableb4.dat

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Star name
  15- 20  F6.2  kpc     X         Galactocentric X position
  22- 25  F4.2  kpc     E_X       Error on X (upper limit)
  27- 30  F4.2  kpc     e_X       Error on X (lower limit)
  32- 37  F6.2  kpc     Y         Galactocentric Y position
  39- 42  F4.2  kpc     E_Y       Error on Y (upper limit)
  44- 47  F4.2  kpc     e_Y       Error on Y (lower limit)
  48- 53  F6.2  kpc     Z         Galactocentric Z position
  55- 58  F4.2  kpc     E_Z       Error on Z (upper limit)
  60- 63  F4.2  kpc     e_Z       Error on Z (lower limit)
  65- 69  F5.2  kpc     r         Heliocentric distance
  71- 74  F4.2  kpc     E_r       Error on r (upper limit)
  76- 79  F4.2  kpc     e_r       Error on r (lower limit)
  81- 85  F5.1  Myr     Age       Evolutionnary age
  87- 91  F5.1  Myr     E_Age     Error on Age (upper limit)
  93- 97  F5.1  Myr     e_Age     Error on Age (lower limit)
  99-103  F5.1  Myr     tfl       Flight time (time the star spent on the orbit
                                   after ejection)
 105-109  F5.1  Myr     E_tfl     Error on tfl (upper limit)
 111-114  F4.1  Myr     e_tfl     Error on tfl (lower limit)
 116-118  I3    km/s    Vej       Ejection velocity
 120-122  I3    km/s    E_Vej     Error on Vej (upper limit)
 124-126  I3    km/s    e_Vej     Error on Vej (lower limit)
 128-133  F6.2  kpc     X0        X0 position of the point of ejection in the
                                   galactic plane
 135-139  F5.2  kpc     E_X0      Error on X0 (upper limit)
 141-145  F5.2  kpc     e_X0      Error on X0 (lower limit)
 147-152  F6.2  kpc     Y0        Y0 position of the point of ejection in the
                                   galactic plane
 154-158  F5.2  kpc     E_Y0      Error on Y0 (upper limit)
 160-164  F5.2  kpc     e_Y0      Error on Y0 (lower limit)


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    13-Oct-2011