TYC 3637-1152-1-A high amplitude delta Scuti star with peculiar pulsational properties

Warning

This publication doesn't include Faculty of Economics and Administration. It includes Faculty of Science. Official publication website can be found on muni.cz.
Authors

PAUNZEN Ernst BERNHARD Klaus FRAUENBERGER Moriz HELBIG Svetlana HERDIN Andreas HÜMMERICH Stefan JANÍK Jan KARNTHALER Andreas KOMŽÍK Richard Milan KULTERER Beatrice MAITZEN Hainz-Michael MEINGAST Stefan MIKSCH Sebastian PRIBULLA Theodor RODE-PAUNZEN Monika SAKULER Wolfgang SCHODER Carla SEMENKO Eugene SULZENAUER Nikolaus

Year of publication 2019
Type Article in Periodical
Magazine / Source New Astronomy
MU Faculty or unit

Faculty of Science

Citation
Web Full Text
Doi http://dx.doi.org/10.1016/j.newast.2018.10.001
Keywords Stars: variables: delta Scuti; Stars: individual: TYC 3637-1152-1
Description 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 F4 V and an age of log t = 9.1. Employing archival time series data from different sources, two frequencies f(0) = 10.034 c/d and f(1) = 12.681 c/d and their harmonics and linear combinations were identified. The period ratio of f(0)/f(1), = 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.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.