TYC 3637-1152-1 - a High Amplitude delta Scuti star with peculiar pulsational properties

Abstract

In some delta Scuti stars, only one or two radial modes are excited (usually the fundamental mode and/or first overtone mode) and the observed peak-to-peak amplitudes exceed 0.3 mag (V). These stars are known as High Amplitude Delta Scuti (HADS) variables. We here present a detailed photometric and spectroscopic analysis of the HADS star TYC 3637-1152-1. We have derived a metallicity close to solar, a spectral type of F4V and an age of log t = 9.1. Employing archival time series data from different sources, two frequencies f0 =10.034 c/d and f1 =12.681 c/d and their harmonics and linear combinations were identified. The period ratio of f0/f1 = 0.791 puts this star into a peculiar position in the Petersen diagram, from which we conclude that TYC 3637-1152-1 is a unique object with peculiar pulsational properties that indicate a transitional state between HADS stars pulsating in the fundamental and first overtone modes and stars pulsating in higher overtones.

arXiv comment8 pages, 5 figures, accepted for publication in New Astronomy

References in corpus (26)

• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• The WASP Project and the SuperWASP Cameras
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• VOSA: Virtual Observatory SED Analyzer. An application to the Collinder 69 open cluster
• The Geneva-Copenhagen Survey of the Solar neighbourhood III. Improved distances, ages, and kinematics
• Northern Sky Variability Survey (NSVS): Public data release
• Galactic Reddening in 3D from Stellar Photometry - An Improved Map
• The first WASP public data release
• A Revised Effective Temperature Scale for the Kepler Input Catalog
• ROTSE All Sky Surveys for Variable Stars I: Test Fields
• New grids of ATLAS9 atmospheres I: Influence of convection treatments on model structure and on observable quantities
• A new catalogue of Stroemgren-Crawford uvbybeta photometry
• Amplitude modulation in $\delta$ Sct stars: statistics from an ensemble study of Kepler targets
• Peranso - Light Curve and Period Analysis Software
• High frequency A-type pulsators discovered using SuperWASP
• Blue Straggler masses from pulsation properties. I. The case of NGC6541
• The double-mode nature of the HADS star GSC 00144-03031 and the Petersen diagram of the class
• Monitoring a high--amplitude Delta Sct star for 152 days: discovery of 12 additional modes and modulation effects in the light curve of CoRoT 101155310
• Thick disk kinematics from RAVE and the solar motion
• Thin disk kinematics from RAVE and the solar motion
• Linear nonadiabatic properties of SX Phoenicis variables
• The kinematics of the white dwarf population from the SDSS DR12
• Metal-Rich SX Phe stars in the Kepler Field
• Period Changes of Delta Scuti Stars and Stellar Evolution
• CCD Photometry of the High Amplitude Delta Scuti Stars V798 Cyg and V831 Tau

Cited by in corpus (1)

• Discovery of new magnetic δ Scuti stars and impact of magnetism on pulsation excitation