2022A&A...666A..51M


Query : 2022A&A...666A..51M

2022A&A...666A..51M - Astronomy and Astrophysics, volume 666A, 51 (2022/10-1)

Cyclic changes in the interacting binary RX Cassiopeiae.

MENNICKENT R.E., DJURASEVIC G., PETROVIC J., GORRINI P., BURGOS F., JURKOVIC M.I., MAGALHAES A.M., SCHLEICHER D. and CALDERON P.

Abstract (from CDS):

We analyzed 109 years of published photometry and times of minima of the eclipsing interacting binary RX Cas. The inclusion of 171 previously unnoticed minima confirms the tendency of an increase in the orbital period at a rate of 1.84 s per cycle. We also find evidence of variations in the length of the previously reported long photometric cycle and changes in the shape of the orbital light curve. By modeling the orbital light curves at different epochs, and assuming symmetry in the system physical conditions during the first and second halves of the long cycle, we find that the changes in the orbital light curve can be explained by variations in the physical properties of the accretion disk. We find that epochs of maximum brightness are those of thicker and hotter disks. In addition, we explore the evolutionary history of the system using the Modules for Experiments in Stellar Astrophysics code and find that the binary can be the result of nonconservative evolution of two stars of very similar initial mass (around 5.5 M) and orbital period of 4 days, although less massive and conservative models of longer starting orbital periods cannot be discarded.

Abstract Copyright: © R. E. Mennickent et al. 2022

Journal keyword(s): binaries: eclipsing - binaries: spectroscopic - binaries : close - stars: evolution

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 BD+67 243 * 03 06 57.3273482688 +67 44 12.621145236   10.01 9.73     B8 13 0
2 V* RX Cas SB* 03 07 45.7479808272 +67 34 38.612093520   10.14 8.64     K1III+A5eIII 183 0
3 SV* HV 936 EB* 05 20 03.9487318944 -69 36 39.063566412     14.800 14.81 14.717 ~ 11 0
4 OGLE LMC-DPV-97 EB* 05 34 18.0682452576 -70 38 08.685182796     16.069   16.086 ~ 8 0
5 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1101 1
6 OGLE BLG-ECL-157529 EB* 17 53 08.3227659048 -32 46 27.017059044     14.829   13.035 ~ 6 0
7 * bet Lyr SB* 18 50 04.7951442356 +33 21 45.600371200 2.85 3.42 3.42 3.31 3.29 B8.5Ib-II 926 0

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