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A new absolute magnitude calibration with 2MASS for cataclysmic variables | | T. Ak
; S. Bilir
; S. Ak
; A. Retter
; | | Date: |
18 Jan 2007 | | 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 $(H-K_{s})_{0}$ colours of {em 2MASS} (Two Micron All Sky Survey) photometric system. The calibration equation covers the ranges $0.032^{d} < P_{orb} leq 0.454^{d}$, $-0.08 < (J-H)_{0} leq 1.54$, $-0.03 <(H-K_{s})_{0} leq 0.56$ and $2.0 < M_{J} < 11.7$; It is based on trigonometric parallaxes with relative errors of $(sigma_{pi}/pi) leq 0.4$. By using the period-luminosity-colours (PLCs) relation, we estimated the distances of cataclysmic variables with orbital periods and {em 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. | | Source: | arXiv, astro-ph/0701531 | | Services: | Forum | Review | PDF | Favorites | |
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