J/A+A/312/93 Cataclysmic variables systemic-velocity (van Paradijs+, 1996)
The systemic-velocity distribution of cataclysmic variables
Van Paradijs J., Augusteijn T., Stehle R.
<Astron. Astrophys. 312, 93 (1996)>
=1996A&A...312...93V 1996A&A...312...93V (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, cataclysmic ; Radial velocities
Keywords: accretion, accretion disks - cataclysmic variables -
stars: kinematics; distances
Description:
We have collected γ velocities of cataclysmic variables from a
survey of published orbital radial-velocity studies. We argue that for
the non-magnetic cataclysmic variables the γ distribution gives
a fair description of the systemic radial velocities; for magnetic
cataclysmic variables the effect of motions within the system appears
to be substantial. Assuming that the distribution of the spatial
velocities of cataclysmic variables in the solar neighbourhood follows
the velocity ellipsoid, with dispersions as given by Wielen (1977), we
estimate that the dispersion of z-velocities of CVs is in the range 16
to 21km/s. With the galactic potential of Kuijken and Gilmore (1989)
we then derive the distribution of distances, z, above the galactic
plane. This distribution has an exponential scale height in the range
160-230pc, which is nearly a factor of two larger than that obtained
for the z distribution of systems with known distances. This probably
reflects the incompleteness of the census of cataclysmic variables at
distances even as small as ∼100pc. The velocity distribution of
cataclysmic variables indicates that they are an old disk population,
with a mix of ages up to 10Gyr.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 70 126 Radial velocities of cataclysmic variables
table1.tex 80 333 LaTeX version of table1
refs 67 161 References
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See also:
V/82 : Cataclysmic binaries (Ritter & Kolb, 1995)
Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 19 A6 --- Type Type (1)
22- 25 I4 km/s RV Radial velocity
26 A1 --- u_RV Uncertainty flag on radial velocity
28- 48 A21 --- Ref Reference codes (see refs file)
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Note (1): the types are:
AM AM Herculis (subtype cataclysmic variables)
DN Dwarf Nova (subtype cataclysmic variables)
DQ DQ Herculis (subtype cataclysmic variables)
IP Intermediate Polars
NA Novae A type
NB Novae B type
NL Nova like objects
SU SU Ursae Majoris (subtype cataclysmic variables)
UG U Geminorum (subtype cataclysmic variables)
UX UX Ursae Majoris (subtype cataclysmic variables)
ZC Z Camelopardalis (subtype cataclysmic variables)
For more information see:
B. Warner, 'Cataclysmic Variables', Cambridge University Press (1995) or
H. Ritter and U. Kolb, in 'X-ray Binaries', Eds W.H.G. Lewin,
J. van Paradijs, & E.P.J. van den Heuvel, Cambridge University Press (1995)
(catalog V/82)
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Byte-by-byte Description of file: refs
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ref Reference number
7- 65 A59 --- Text Text of reference
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(End) Patricia Bauer [CDS] 02-Feb-1996