Bibcode
Balona, L. A.; Breger, M.; Catanzaro, G.; Cunha, M. S.; Handler, G.; Kołaczkowski, Z.; Kurtz, D. W.; Murphy, S.; Niemczura, E.; Paparó, M.; Smalley, B.; Szabó, R.; Uytterhoeven, K.; Christiansen, J. L.; Uddin, K.; Stumpe, M. C.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 424, Issue 2, pp. 1187-1196.
Advertised on:
8
2012
Citations
11
Refereed citations
7
Description
We show that the star KIC 4840675 observed by Kepler is composed of
three stars with a rapidly rotating A-type star and two solar-type
fainter companions. The A-type star is a δ Scuti variable with a
dominant mode and many other modes of lower amplitude, including several
low-frequency variations. The low-frequency variation with highest
amplitude can be interpreted as rotational modulation with the light
curve changing with time. However, the most interesting aspect of this
star is a triplet of independent modes in the range 118-129
d-1 (1.4-1.5 mHz), which is far outside the range of typical
δ Scuti frequencies. We discuss the possibility that these modes
could be solar-like oscillations, oscillations of the roAp type or due
to an unseen pulsating compact companion. Based on observations made
with the Nordic Optical Telescope, operated jointly by Denmark, Finland,
Iceland, Norway and Sweden, on the island of La Palma at the Spanish
Observatorio del Roque de los Muchachos of the Instituto de
Astrofísica de Canarias (IAC).
Related projects
Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur