J/other/NewA/12.446 Absolute magnitudes of cataclysmic variables (Ak+, 2007)
A new absolute magnitude calibration with 2MASS for cataclysmic variables.
Ak T., Bilir S., Ak S., Retter A.
<New Astronomy, 12, 446-453 (2007)>
=2007NewA...12..446A 2007NewA...12..446A
ADC_Keywords: Binaries, cataclysmic ; Stars, distances ; Magnitudes, absolute ;
Photometry, infrared
Keywords: stars: cataclysmic binaries - stars: distances, parallaxes
Abstract:
Using reliable trigonometric measurements, we find that the absolute
magnitude of cataclysmic variables depends on the orbital period and
de-reddened (J-H)0 and (H-Ks)0 colours of 2MASS (Two Micron All
Sky Survey) photometric system. The calibration equation covers the
ranges 0.032d<Porb≤0.454d, -0.08<(J-H)0≤1.54,
-0.03<(H-Ks)0≤0.56 and 2.0<MJ<11.7; It is based on trigonometric
parallaxes with relative errors of (σπ/π)≤0.4. By using
the period-luminosity-colours (PLCs) relation, we estimated the
distances of cataclysmic variables with orbital periods and 2MASS
observations and compared them with distances found from other
methods. We suggest that the PLCs relation can be a useful statistical
tool to estimate the distances of cataclysmic variables.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 76 83 Main catalogue data
refs.dat 133 31 References
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 -- Name Object name
12- 13 A2 -- Type Subgroup (1)
15- 20 F6.4 d Per Orbital period
22- 26 F5.2 mag Jmag 2MASS J magnitude
28- 31 F4.2 mag J-H 2MASS (J-H) colour index
33- 37 F5.2 mag H-Ks 2MASS (H-Ks) colour index
39- 42 F4.2 mag E(B-V) Colour excess
44- 45 A2 -- r_E(B-V) References of colour excess, in refs.dat
48- 52 F5.2 mag JMAG Absolute magnitude in J band
54- 57 I4 pc Distl ? Distance from literature
59- 63 A5 -- r_Distl References of distances, in refs.dat
65- 68 I4 pc Dist Distance from the calibration equation
70- 72 I3 pc E_Dist Upper confidence limit on distance
74- 76 I3 pc e_Dist Lower confidence limit on distance
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Note (1): Subgroup as follows:
DN = Dwarf nova
NL = Nova-like
CV = Cataclysmic variables
N = Nova
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 47 A24 --- Aut Author's name
50-133 A84 --- Com Comments
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Acknowledgements:
Tansel AK, tanselak(at)istanbul.edu.tr
(End) Patricia Vannier [CDS] 27-Aug-2007