GSC 2701-2527, a new multiperiodic high-amplitude Delta Scuti variable

D. P. Kjurkchieva1*, D. P. Dimitrov2†, S. I. Ibryamov2‡, and M. Srinivasa Rao3
1Department of Astronomy, University of Shumen, 115 Universitetska Str., 9712, Shumen, Bulgaria
2Institute of Astronomy and Rozhen Observatory, BAS, 72 Tsarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
3Indian Institute of Astrophysics, Bangalore 560034, India

Received: 16th October 2012 | Accepted: 02 March 2013

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Our BVI photometric observations reveal that GSC 2701-2527 is a high amplitude ᵟ Scuti star with quite low temperature. The frequency analysis exhibits that it is multiperiodic pulsator. The obtained period ratio f1/ f2=0.791 is higher than the canonical value. The large value of the period ratio f1/ f3=0.813 implies nonradial nature of the third mode. Using empirical relations for the ᵟ Scuti stars we determined the global parameters of GSC 2701-2527: luminosity 26.2 L, radius 3.95 R, mass 2.18 M, and distance 506 pc.

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Keywords : methods: observational – methods: data analysis – stars: variables: ᵟ Scuti – stars: fundamental parameters – stars: individual GSC 2701-2527