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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 76 83 Main catalogue data refs.dat 133 31 References
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
Note (1): Subgroup as follows: DN = Dwarf nova NL = Nova-like CV = Cataclysmic variables N = Nova
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 47 A24 --- Aut Author's name 50-133 A84 --- Com Comments
Acknowledgements: Tansel AK, tanselak(at)
(End) Patricia Vannier [CDS] 27-Aug-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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