6533b881fe1ef96bd12d7c7d

RESEARCH PRODUCT

Pulsations of HD 181231

C. NeinerJ. Gutierrez-sotoF. BaudinB. De BatzY. FrematA.-l. HuatM. FloquetA.-m. HubertB. LeroyP.d. DiagoE. PorettiF. CarrierM. RainerC. CatalaO. ThizyC. BuilJ. RibeiroL. AndradeM. EmilioF. Espinosa LaraJ. FabregatE. Janot-pachecoC. MartayanT. SemaanJ. SusoA. BaglinE. MichelR. Samadi

subject

observational astronomyEarly type starsAstrophysics and AstronomyExoplanet AstronomyEarly-type starsStellar AstronomyBe starsPhysicsPolarimetryAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsNatural SciencesSpectroscopy

description

HD181231 is a B5IVe star, which has been observed with the CoRoT satellite during ~5 consecutive months and simultaneously from the ground in spectroscopy and spectropolarimetry. By analysing these data, we aim to detect and characterize as many pulsation frequencies as possible, to search for the presence of beating effects possibly at the origin of the Be phenomenon. Our results will also provide a basis for seismic modelling. The fundamental parameters of the star are determined from spectral fitting and from the study of the circumstellar emission. The CoRoT photometric data and ground-based spectroscopy are analysed using several Fourier techniques: Clean-ng, Pasper, and Tisaft, as well as a time-frequency technique. A search for a magnetic field is performed by applying the LSD technique to the spectropolarimetric data.

yearjournalcountryeditionlanguage
2009-01-01
10.26093/cds/vizier.35060143https://doi.org/http://doi.org/10.26093/cds/vizier.35060143