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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Multiyear and multisite photometric campaigns on the bright high-amplitude pulsating subdwarf B star EC 01541-1409
Monthly Notices of the Royal Astronomical Society, Volume 421, No. 1, Year 2012
Notification
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Description
We present follow-up observations of the pulsating subdwarf B (sdB) star EC 01541-1409 as part of our efforts to resolve pulsation spectra for use in asteroseismological analyses. This paper reports on data obtained from a single-site campaign, during 2008, and a multisite campaign, during 2009. From limited 2008 data, we were able to clearly resolve and pre-whiten 24 periods. A subsequent multisite campaign spanning nearly 2 months found over 30 individual periodicities most of which were unstable in amplitude and/or phase. Pulsation amplitudes were found to the detection limit, meaning that further observations would likely reveal more periodicities. EC 01541-1409 reveals itself to be one of two sdB pulsators with many pulsation frequencies covering a large frequency range. Unlike the other star of this type (PG 0048+091), it has one high-amplitude periodicity which appears phase stable, making EC 01541-1409 an excellent candidate for exoplanet studies via pulsation phases. No multiplets were detected leaving EC 01541-1409 as yet another rich p-mode sdB pulsator without these features, limiting observational constraints on pulsation modes. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Authors & Co-Authors
Reed, Michael D.
United States, Springfield
Missouri State University
Kilkenny, David
South Africa, Bellville
University of the Western Cape
O'Toole, Simon J.
Australia
Australian Astronomical Observatory
Østensen, Roy H.
Belgium, Leuven
Departement Natuurkunde en Sterrenkunde
Honer, C.
United States, Springfield
Missouri State University
Gilker, J. T.
United States, Springfield
Missouri State University
Quint, A. C.
United States, Springfield
Missouri State University
Doennig, A. M.
United States, Springfield
Missouri State University
Hicks, L. H.
United States, Springfield
Missouri State University
Thompson, M. A.
United States, Springfield
Missouri State University
McCart, Phillip A.
United States, Springfield
Missouri State University
Zietsman, Ewald
South Africa, Cape Town
South African Astronomical Observatory
Chen, Wenping
Taiwan, Taoyuan
National Central University
Chen, Chinwei
Taiwan, Taoyuan
National Central University
Lin, Chiencheng
Taiwan, Taoyuan
National Central University
Beck, Paul G.
Belgium, Leuven
Departement Natuurkunde en Sterrenkunde
Degroote, Pieter
Belgium, Leuven
Departement Natuurkunde en Sterrenkunde
Barlow, Brad N.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
United States, University Park
Pennsylvania State University
Reichart, Daniel E.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Nysewander, Melissa C.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
LaCluyzé, Aaron P.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Ivarsen, Kevin M.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Haislip, Joshua B.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Baran, Andrzej S.
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Winiarski, Maciej
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Drozdz, Marek
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Statistics
Citations: 26
Authors: 26
Affiliations: 9
Identifiers
Doi:
10.1111/j.1365-2966.2011.20289.x
ISSN:
00358711
e-ISSN:
13652966
Study Design
Cohort Study
Phenomenological Study