2013AJ....145..127I -
Astron. J., 145, 127 (2013/May-0)
The low-mass interacting binary system OO Aql revisited: a new quadruple system.
ICLI T., KOCAK D., BOZ G.C. and YAKUT K.
Abstract (from CDS):
In this study we present photometric and spectroscopic variation analysis and an orbital period study of a low-mass interacting system OO Aql. Simultaneous solution of the light and radial velocity curves provides us with the determination of a new set of stellar physical parameters for the primary and the secondary companion, M1= 1.05(2) M☉, M2= 0.89(2) M☉, R 1= 1.38(2) R☉, R2= 1.28(2) R☉, log (L1/L☉) = 0.258, and log (L2/L☉) = 0.117, and the separation of the components was determined to be a = 3.333(16) R☉. Newly obtained parameters yield the distance of the system as 136(8) pc. Analyses of the mid-eclipse times indicate a period increase of (P/{dot}P) = 4 x 107 yr that can be interpreted in terms of the mass transfer (dM/dt) = 5x10–8 M☉/yr from the less massive component to the more massive component. Our new solution confirmed that OO Aql is a multiple system in the form of AB + C + D. We found initial astrophysical parameters for the component of the system and its current age to be 8.6 Gyr using a non-conservative stellar evolution model (EV-TWIN code).
Abstract Copyright:
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Journal keyword(s):
binaries: close - binaries: general - stars: evolution - stars: fundamental parameters - stars: individual: OO Aql
Simbad objects:
4
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