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Distances and Absolute Magnitudes of a Sample of Faint Cataclysmic Variables

Published online by Cambridge University Press:  12 April 2016

L. N. Sproats
Affiliation:
Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, England
S. B. Howell
Affiliation:
Astrophysics Group, Planetary Science Institute, 620 N. 6th Ave, Tucson, AZ., USA
K. O. Mason
Affiliation:
Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, England

Extract

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Our current knowledge of the basic characteristics of CVs, such as their distance and luminosity, are largely based on observations of optically bright (V < 16 mag) systems. This has tended to favour the more luminous members (Mv ~ 7 … 10 mag) lying nearby in the Galactic plane (z < 400 pc;). In order to alleviate this bias, Howell & Szkody (1990) compiled a list of ~90 CVs that were faint enough and were at high galactic latitude to potentially place them well outside the Galactic plane, in the halo. We have obtained infrared J and K band images of a number of the CVs listed by Howell & Szkody (1990) in order to establish whether these systems are truely at large distances, or are instead a population of intrinsically faint objects lying relatively nearby. The distances were determined using Bailey’s method (1982) and incorporated the recent SK calibrations by Ramseyer (1994).

Type
Non-Magnetic Cataclysmic Variables
Copyright
Copyright © Kluwer 1996

References

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