Article in PDF |
"Peremennye Zvezdy", Prilozhenie, vol. 12, N 7 (2012) |
ISSN 2221–0474 |
Received: 24.05.2012; accepted: 31.07.2012
(E-mail for contact: khruslov@bk.ru)
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Remarks: | |||||||||||||||
The variability of GSC 6558-01290 = ASAS 075842-2536.1 was discovered by Pojmanski
(2002).
The ASAS-3 catalog lists the variable as an RRC star with the period of 0.41013 d.
I reinvestigated the star using the currently available ASAS-3 data and found it an RR(B) star, pulsating in the first and second overtone modes (an extension of the GCVS RR(B) type, which is defined as fundamental-mode and first-overtone pulsators). The phased light curves plotted for the tabulated elements are shown in the Figure.
The period ratio P2/P1 = 0.8000 is typical of double-mode variables pulsating in the first and second overtone modes. The tabulated coordinates of the variable were drawn from the Tycho2 catalog. J–H = 0.231 (2MASS). The star is in a close pair with the much fainter GSC 6558-00870; the combined brightness was measured, thus the actual amplitude can be somewhat larger. | |||||||||||||||
References: | |||||||||||||||
Pojmanski, G., 2002, Acta Astron., 52, 397 |
Light Curve |