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2000PASP..112.1467S - Publ. Astron. Soc. Pac., 112, 1467-1478 (2000/November-0)
A time-resolved photometric study of the eclipsing dwarf nova RX J0909+1849.
SHAFTER A.W., CLARK L.L., HOLLAND J. and WILLIAMS S.J.
Abstract (from CDS):
The mass ratio of RX J0909+1849 is unknown, thus the orbital inclination is not tightly constrained by the model. Five mass ratios have been considered spanning a range of plausible values, 0.3≤q(=M2/M1)≤0.7. Over this range of q, the inclination varies between roughly 74° and 80°. Model parameters include the temperatures of the white dwarf (T1) and the secondary star (T2), the radius (Rd) and temperature (Td) of the disk periphery, the disk power-law temperature exponent (α), and the bright spot temperature (Ts). With the exception of the q=0.3 models, which required a relatively hot white dwarf (80,000 K), the optimum values of the parameters are nearly constant with mass ratio. For a representative mass ratio of q=0.5, values of T1=26,000±14,000 K, Ts=18,000±7000 K, Td=3200±600 K, Rd/RL1=0.54±0.08, α=0.53±0.11, and B-V=0.45±0.07 are found. A value of T2=3400 K has been adopted for all models based on the spectral type of the secondary star (M3-M4).
The observed color (B-V=0.4±0.2) is consistent with the colors given by the model; thus, it is unlikely that RX J0909+1849 suffers significant interstellar absorption. The observed spectral type of the secondary star suggests an absolute magnitude in the range 10.6<MV(2)<11.0. After correcting the apparent V magnitude at mideclipse by the fraction of light originating from the secondary star (∼94%), a distance of ∼200-250 pc is derived for the RX J0909+1849 system.
Abstract Copyright: ∼
Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Novae, Cataclysmic Variables
CDS comments: RX J0909+1849 = RX J0909.8+1849
Simbad objects: 6
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