Peremennye Zvezdy (Variable Stars) 34, No. 1, 2014
Received 7 March; accepted 13 March.
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|We present our discovery of a new double-mode high-amplitude Scuti variable, HADS(B) type, USNO-B1.0 1329-0132547. We found the frequencies and . The period ratio is typical of radially pulsating HADS(B) stars.|
Our observations are available online in the html version of this paper.
|Mode||Frequency, c/d||Semi-amplitude||Period, d||Epoch, HJD|
|, mag||, mag||, mag|
The light curves of USNO-B1.0 1329-0132547 in the , and bands are displayed in Figs. 3, 4, 5. The power spectra of USNO-B1.0 1329-0132547 (Fig. 2) are plotted both for the raw data and with the fundamental-mode oscillations subtracted.
The -band range of USNO-B1.0 1329-0132547 is from 1728 to 1758; the -band range is 183-187. The delta magnitude -band range is 2.18-2.40. The period ratio is typical of high-amplitude double-mode Scuti stars radially pulsating in the fundamental and first overtone modes (Petersen & Christensen-Dalsgaard 1996). The infrared color index (2MASS) does not contradict the suggested type if we take into account possible reddening for the galactic latitude .
Acknowledgments: The authors are grateful to Dr. V.P. Goranskij for providing software for the light-curve analysis. We wish to thank M.A. Krugov for technical assistance during the observations. This study was supported by the Russian Foundation for Basic Research (grant 13-02-00664), the Programme "Non-stationary Phenomena of Objects in the Universe" of the Presidium of Russian Academy of Sciences, and the program "Studies of Physical Phenomena in Star-forming Regions and Nuclear Zones of Active Galaxies" of the Ministry of Education of Science (Republic of Kazakhstan).
Fig. 3. The light curves of USNO-B1.0 1329-0132547, band. Upper panels: raw data; lower panels: the folded light curves with the other oscillation pre-whitened.
Skrutskie, M.F., Cutri, R.M., Stiening, R., et al., 2006, Astron. J., 131, 1163
Petersen, J.O., Christensen-Dalsgaard, J., 1996, Astron. and Astrophys., 312, 463