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J/AJ/129/2294  Radial velocities of weak-lines T Tauri stars (Massarotti+, 2005)
A search for substellar companions around 15 weak-lined T Tauri stars with the
Planetary Camera 2 of the Hubble Space  Telescope.
    Massarotti A., Latham D.W., Torres G., Brown R.A., Oppenheimer B.D.
   <Astron. J., 129, 2294-2307 (2005)>
   =2005AJ....129.2294M
ADC_Keywords: Binaries, spectroscopic ; Stars, dwarfs ;
              Stars, pre-main sequence ; Radial velocities
Keywords: binaries: spectroscopic - planetary systems - stars: imaging -
          stars: low-mass, brown dwarfs -  stars: pre-main-sequence

Abstract:
    To search for thermal emission from substellar companions, we have
    obtained Z-band images of 15 weak-lined T Tauri stars in the
    Taurus-Auriga and Ophiuchus star-forming regions using the Planetary
    Camera 2 on the Hubble Space Telescope. To complement the imaging
    program, extensive spectroscopic observations were obtained with the
    Center for Astrophysics Digital Speedometers.

Description:
    Three nearly identical echelle spectrographs have been used on the MMT
    and 1.5m Tillinghast Reflector at the F. L. Whipple Observatory atop
    Mount Hopkins, Arizona, and on the 1.5m Wyeth Reflector located at the
    Oak Ridge Observatory in the town of Harvard, Massachusetts. For our
    HST observations with the PC2 we chose the near-infrared
    intermediate-band filter W1042 (Z band).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        87       17   Target weak-lined T Tauri stars
table5.dat        63      307   Radial velocities


See also:
  J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
  J/A+A/372/173  : ISOCAM observations of the rho Ophiuchi cloud
                                                         (Bontemps+, 2001)


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

   Bytes Format Units     Label        Explanations

   1-  9  A9    ---       Name         T Tauri star name
      10  A1    ---       m_Name       Multiplicity index on Name
  12- 13  I2    h         RAh          Hour of Right Ascension (J2000.0)
  15- 16  I2    min       RAm          Minute of Right Ascension (J2000.0)
  18- 22  F5.2  s         RAs          Second of Right Ascension (J2000.0)
      24  A1    ---       DE-          Sign of the Declination (J2000.0)
  25- 26  I2    deg       DEd          Degree of Declination (J2000.0)
  28- 29  I2    arcmin    DEm          Arcminute of Declination (J2000.0)
  31- 34  F4.1  arcsec    DEs          Arcsecond of Declination (J2000.0)
  36- 40  F5.2  mag       Vmag         ? V band magnitude
  42- 45  F4.2  mag       B-V          ? B-V color index
  47- 50  F4.2  mag       K-L          ? K-L color index
  52- 57  F6.2  ---       EW(Ha)       ? Hα equivalent width
  59- 62  F4.2  mag       AZ           ? Extinction in the Z band (1)
  64- 65  A2    ---       SpType       MK spectral type
  67- 70  F4.2  [K]       log(Teff)    Effective temperature
  72- 76  F5.2  [solLum]  log(L)       Luminosity
  78- 87  A10   ---       Ref          References (2)

Note (1): Extinction in the Z band (HST W1042 filter), AZ, were derived from
           published J-band extinction estimates when available and from V-band
           estimates otherwise, using the mean extinction curve reported by
           Fitzpatrick (1999PASP..111...63F).
Note (2): References, defined as follows:
    2 = Kenyon & Hartmann (1995, Cat. J/ApJS/101/117)
    3 = Jones & Herbig (1979AJ.....84.1872J)
    4 = Simon et al. (1995ApJ...443..625S)
    5 = Walter et al. (1994AJ....107..692W)
    6 = Chen et al. (1995ApJ...445..377C)
    7 = Nuernberger et al. (1998A&A...330..549N)
    8 = Bouvier & Appenzeller (1992A&AS...92..481B)
    9 = Bontemps et al. (2001, Cat. J/A+A/372/173)


Byte-by-byte Description of file: table5.dat

   Bytes Format Units     Label     Explanations

   1-  9  A9    ---       Name      T-Tauri star name
  11- 12  I2    h         RAh       Hour of Right Ascension (J2000)
  14- 15  I2    min       RAm       Minute of Right Ascension (J2000)
  17- 20  F4.1  s         RAs       Second of Right Ascension (J2000)
      22  A1    ---       DE-       Sign of the Declination (J2000)
  23- 24  I2    deg       DEd       Degree of Declination (J2000)
  26- 27  I2    arcmin    DEm       Arcminute of Declination (J2000)
  29- 30  I2    arcsec    DEs       Arcsecond of Declination (J2000)
      32  A1    ---       Tel       Telescope code (1)
  34- 45  F12.4 d         HJD       Heliocentric Julian Date of observation
  47- 52  F6.2  km/s      RV        Radial velocity
  54- 57  F4.2  km/s      e_RV      ? Error in RV
  59- 63  F5.2  km/s      RV2       ? Secondary component radial velocity

Note (1): Telescope code, defined as follows:
    T = 1.5-m Tillinghast Reflector;
    M = Multiple Mirror Telescope;
    W = 1.5-m Wyeth Reflector.


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    13-Sep-2006