Mode identification in the high-amplitude delta Scuti star V2367 Cyg

Abstract

We report on a multisite photometric campaign on the high-amplitude delta Scuti star V2367 Cyg in order to determine the pulsation modes. We also used high-dispersion spectroscopy to estimate the stellar parameters and projected rotational velocity. Time series multicolour photometry was obtained during a 98-d interval from five different sites. These data were used together with model atmospheres and non-adiabatic pulsation models to identify the spherical harmonic degree of the three independent frequencies of highest amplitude as well as the first two harmonics of the dominant mode. This was accomplished by matching the observed relative light amplitudes and phases in different wavebands with those computed by the models. In general, our results support the assumed mode identifications in a previous analysis of Kepler data.

C1 [Ulusoy, C.; Guelmez, T.] Univ Johannesburg, Dept Phys, ZA-2006 Johannesburg, South Africa.

[Ulusoy, C.] Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey.

[Stateva, I.; Dimitrov, D.; Iliev, I. Kh] Bulgarian Acad Sci, Inst Astron NAO, BU-1784 Sofia, Bulgaria.

[Kobulnicky, H. A.] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82072 USA.

[Yasarsoy, B.] Ege Univ Observ, TR-35100 Izmir, Turkey.

[Yasarsoy, B.] Inonu Univ, Fac Arts & Sci, Dept Astron & Space Sci, TR-44069 Malatya, Turkey.

[Alvarez, M.; Michel, R.; Fox Machado, L.] Univ Nacl Autonoma Mexico, Inst Astron, Observ Astron Nacl, Ensenada 22830, Baja California, Mexico.

[Damasso, M.; Carbognani, A.; Cenadelli, D.] Astron Observ Autonomous Reg Aosta Valley OAVdA, I-11020 Nus, Aosta, Italy.

[Damasso, M.] Univ Padua, Dept Phys & Astron, I-35122 Padua, Italy.

[Pickering, T. E.] Southern African Large Telescope Fdn, ZA-7935 Cape Town, South Africa.

[Pickering, T. E.; Balona, L. A.] S African Astron Observ, ZA-7935 Cape Town, South Africa.

[Kwon, J.; Tamura, M.] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.

[Kwon, J.; Tamura, M.] Grad Univ Adv Studies Sokendai, Dept Astron Sci, Mitaka, Tokyo 1818588, Japan.