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J/MNRAS/284/265     Rotational Velocities of 373 OB stars    (Howarth+ 1997)
Cross-correlation characteristics of OB stars from IUE spectroscopy.
    Howarth I.D., Siebert K.W., Hussain G.A.J., Prinja R.K.
   <Mon. Not. R. Astron. Soc. 284, 265 (1997)>
   =1997MNRAS.284..265H
ADC_Keywords: Rotational velocities ; Stars, OB ; Spectra, ultraviolet

Keywords: stars: early-type - stars: fundamental parameters -
          stars: rotation -  ultraviolet: stars

Abstract:
    We present a catalogue of homogeneous measures of the linewidth
    parameter, ve.sin(i), for 373 O-type stars and early supergiants
    (including the separate components of 25 binary and triple systems),
    produced by cross-correlating high-resolution, short-wavelength IUE
    spectra against a `template' spectrum of τ Sco. We also tabulate
    terminal velocities. There are no O supergiants in our sample with
    ve.sin(i)<65km/s, and only one supergiant earlier than B5 has
    ve.sin(i)<50km/s, confirming that an important line broadening
    mechanism in addition to rotation must be present in these objects.
    A calibration of the area under the cross-correlation peak against
    spectral type is used to obtain estimates of continuum intensity
    ratios of the components in 28 spectroscopically binary or multiple
    systems. At least seven SB2 systems show evidence for the
    `Struve-Sahade effect', a systematic variation in relative line
    strength as a function of orbital phase. The stellar wind of the most
    rapid rotator in our sample, the O9III:n* star HD 191423
    (ve.sin(i)≤436km/s), show it to have a `wind-compressed disc'
    similar to that of HD 93521; this star and other rapid rotators are
    good candidates for studies of non-radial pulsation.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
catalog.dat       81      376   Velocity Measurements (Table 3 of paper)
notes.dat         80      346   Individual Notes


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

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Name      Designation of the star
  17- 34  A18   ---     SpType    Adopted spectral type (1)
  38- 40  A3    ---     r_SpType *Source of spectral type (2)
  45- 47  I3    km/s    v.sin(i)  ? V.sin(i) measurement, in km/s
  48- 49  A2    ---   u_v.sin(i)  [: ] Uncertainty flag on v.sin(i)
  53- 56  I4    km/s    v(inf)    ? Terminal wind velocity, in km/s (1)
      57  A1    ---     u_v(inf)  [)] Uncertaintly flag on v(inf)
  60- 81  A22   ---     Notes     Some alternative designations, and flags
                                   '*' for comments in file "notes.dat" (3)

Note (1): generally refers to combined spectrum in binary and multiple systems

Note (2): the source of Spectral Type is coded as follows:
    CL  = Conti & Leep (1974ApJ...193..113C);
    CLL = Conti, Leep & Lorre (1977ApJ...214..759C);
    DWC = Dworetsky, Whitelock & Carnochan (1982MNRAS.201..901D);
    F58 = Feast (1958MNRAS.118..618F);
    GCM = Garmany, Conti & Massey (1987AJ.....93.1070G);
    GGR = Georgelin, Georgelin & Roux (1973A&A....25..337G);
    GHS = Garrison, Hiltner & Schild (1977ApJS...35..111G);
    HGS = Hiltner, Garrison & Schild (1969ApJ...157..313H);
    HHC = Houk, Hartoog & Cowley (1976AJ.....81..116H);
    HKB = Hill, Kilkenny & van Breda (1974MNRAS.168..451H);
    HMo = Hobbs et al. (1982ApJ...263..690H);
    H70 = Hill (1970MNRAS.150...23H);
    MCB = McConnell & Bidelman (1976AJ.....81..225M);
    MCW = Morgan, Code & Whitford (1955ApJS....2...41M);
    M88 = Mathys (1988A&AS...76..427M);
    M89 = Mathys (1989A&AS...81..237M);
    S70 = Schild (1970ApJ...161..855S);
    ThA = Thackeray & Andrews (1974A&AS...16..323T);
    WPN = Walborn, Parker & Nichols (Cat. III/188);
    W72, W73, W76, W81, W82 = Walborn (1972AJ.....77..312W,
         1973AJ.....78.1067W, 1976ApJ...205..419W, 1981ApJ...243L..37W,
         1982AJ.....87.1300W).
Note (3): In the notes, "SWP" refers to sequential numbers of images taken
     with the Short Wavelength Prime camera on the IUE.


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

   Bytes Format Units   Label     Explanations

   1- 11  A11   ---     Name      Name of star (repeated if several lines)
  13- 80  A68   ---     Text      Text of note


Acknowledgements:
    Ian Howarth  
    Dept. Physics & Astronomy,
    University College London,
    Gower St., London WC1E 6BT, UK
    http://www.star.ucl.ac.uk/~idh

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(End)                 Ian Howarth [UCL],  Francois Ochsenbein [CDS]  30-Jun-1997