Cross-correlation characteristics of OB stars from IUE spectroscopy

  title={Cross-correlation characteristics of OB stars from IUE spectroscopy},
  author={Ian D Howarth and Kaj W. Siebert and Gaitee A. J. Hussain and Raman K. Prinja},
  journal={Monthly Notices of the Royal Astronomical Society},
We present a catalogue of homogeneous measures of the linewidth parameter, v(e) sin i, for 373 O-type stars and early B supergiants (including the separate components of 25 binary and three triple systems), produced by cross-correlating high-resolution, short-wavelength IUE spectra against a 'template' spectrum of tau Sco. We also tabulate terminal velocities. There are no O supergiants in our sample with v(e) sin i < 65 km s(-1), and only one supergiant earlier than B5 has v(e) sin i < 50 km s… 
A spectroscopic investigation of the O-type star population in four Cygnus OB associations. II. Determination of the fundamental parameters
Aims. Having established the binary status of nineteen O-type stars located in four Cygnus OB associations, we now determine their fundamental parameters to constrain their properties and their
Optical spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 93205
A new high-quality set of orbital parameters for the O-type spectroscopic binary HD 93205 has been obtained combiningand coude CCD observations. The radial velocity orbits derived from the He ii
Fourier method of determining the rotational velocities in OB stars
Aims. We present a comprehensive study that applies the Fourier transform to a sample of O and early B-type stars (either dwarfs, giants, or supergiants) to determine their projected rotational
Binary and Multiple O-Type Stars in the Cassiopeia OB6 Association
We present the results of time-resolved spectroscopy of 13 O-type stars in the Cas OB6 stellar association. We conducted a survey for radial velocity variability in search of binary systems, which
Quantitative H and K band spectroscopy of Galactic OB-stars at medium resolution
In this paper we have analyzed 25 Galactic O and early B-stars by means of H  and K  band spectroscopy, with the primary goal to investigate to what extent a lone near-IR spectroscopy is able to
The massive star binary fraction in young open clusters – III. IC 2944 and the Cen OB2 association
Using an extended set of multi-epoch high-resolution high signal-to-noise ratio optical spectra, we readdress the multiplicity properties of the O-type stars in IC 2944 and in the Cen OB2
Chemical composition of B-type supergiants in the OB 8, OB 10, OB 48, OB 78 associations of M 31
Absolute and dierential chemical abundances are presented for the largest group of massive stars in M 31 studied to date. These results were derived from intermediate resolution spectra of seven
On the presence and absence of disks around O-type stars
Context. As the favoured progenitors of long-duration gamma-ray bursts, massive stars may represent our best signposts of individual objects in the early Universe, but special conditions seem
The Projected Rotational Velocity Distribution of a Sample of OB stars from a Calibration Based on Synthetic He I Lines
We derive projected rotational velocities (v sin i) for a sample of 156 Galactic OB star members of 35 clusters, H II regions, and associations. The He I lines at 4026, 4388, and 4471 A were analyzed
Optical spectroscopy of X‐Mega targets – IV. CPD – 59°2636: a new O‐type multiple system in the Carina Nebula
High-resolution optical spectroscopy of CPD −59 ◦ 2636, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this object to be a multiple system displaying triple