J/A+A/331/949 Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)
Wolf-Rayet stars and O-star runaways with HIPPARCOS. I. Kinematics.
(Based on data from the ESA Hipparcos astrometry satellite)
Moffat A.F.J., Marchenko S.V., Seggewiss W., van der Hucht K.A.,
Schrijver H., Stenholm B., Lundstrom I., Setia Gunawan D.Y.A.,
Sutantyo W., van den Heuvel E.P.J., De Cuyper J.-P., Gomez A.E.
<Astron. Astrophys. 331, 949 (1998)>
=1998A&A...331..949M 1998A&A...331..949M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Wolf-Rayet ; Stars, O ; Proper motions ; Radial velocities
Keywords: astrometry - stars: kinematics - stars: early-type -
stars: Wolf-Rayet - Galaxy: kinematics and dynamics
Abstract:
Reliable systemic radial velocities are almost impossible to secure
for Wolf-Rayet stars, difficult for O stars. Therefore, to study the
motions - both systematic in the Galaxy and peculiar - of these two
related types of hot, luminous star, we have examined the Hipparcos
proper motions of some 70 stars of each type. We find that (a) both
groups follow Galactic rotation in the same way, (b) both have a
similar fraction of ``runaways'', (c) mean kinetic ages based on
displacement and motion away from the Galactic plane tend to slightly
favour the cluster ejection over the the binary supernova hypothesis
for their formation, and (d) those with significant peculiar
supersonic motion relative to the ambient ISM, tend to form bow shocks
in the direction of the motion.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 183 141 Summary of pertinent data for peculiar motions
of the 74 O stars and 67 WR stars, in order of
HIP number (RA for most stars)
table1.tex 133 430 LaTeX version of table1
fig/* . 5 Corrected figures 1 to 5
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- HD/DM HD/DM catalogue number
13- 25 A13 --- Other Other names
26- 31 I6 --- HIP HIPPARCOS catalogue number (Cat. I/239)
33- 47 A15 --- Sp Spectral class
49- 53 F5.2 mag Vmag Visual magnitude (1)
55- 62 F8.4 deg GLON Galactic longitude (Epoch 1991.25)
64- 71 F8.4 deg GLAT Galactic latitude (Epoch 1991.25)
73- 77 F5.2 kpc r Sun-star distance
79- 83 I5 pc z Star-Galactic plane distance
85- 90 F6.1 mas/yr pmGLON Observed proper motion (component along the
Galactic longitude)
92- 94 F3.1 mas/yr e_pmGLON Error of pmGLON
96-100 F5.1 mas/yr pmGLAT Observed proper motion (component along the
Galactic latitude)
102-104 F3.1 mas/yr e_pmGLAT Error of pmGLAT
106-110 F5.1 mas/yr pmGLONp Peculiar proper motion (component along the
Galactic longitude)
112-116 F5.1 --- pmGLONp/e_pmGLONp Ratio of the peculiar longitudinal
proper motion to the proper motion error
118-122 F5.1 mas/yr pmGLATp Peculiar proper motion (component along
the Galactic latitude)
124-128 F5.1 --- pmGLATp/e_pmGLATp Ratio of the peculiar latitudinal
proper motion to the proper motion error
130-134 F5.1 km/s TVp Peculiar tangential velocity
136-140 F5.1 km/s e_TVp Error of the peculiar tangentional velocity
142-147 F6.1 km/s HRV ? Heliocentric radial velocity
149-153 F5.1 km/s HRVp ? Peculiar component of the radial velocity
155-184 A30 ---- Remarks Comments
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Note (1): Broadband Hp V for OB stars, narrowband continuum v for W-R stars.
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Acknowledgements: Sergey Marchenko
History: On 23-Apr-1999, table1 have been modified and corrected figures 1 to 5
added, see the Erratum 1999A&A...344..321M 1999A&A...344..321M.
(End) Patricia Bauer [CDS] 23-Apr-1999