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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Whole Earth Telescope observations of BPM 37093: A seismological test of crystallization theory in white dwarfs
Astronomy and Astrophysics, Volume 432, No. 1, Year 2005
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Description
BPM 37093 is the only hydrogen-atmosphere white dwarf currently known which has sufficient mass (∼1.1 M⊙) to theoretically crystallize while still inside the ZZ Ceti instability strip (Teff ∼ 12000 K). As a consequence, this star represents our first opportunity to test crystallization theory directly. If the core is substantially crystallized, then the inner boundary for each pulsation mode will be located at the top of the solid core rather than at the center of the star, affecting mainly the average period spacing. This is distinct from the "mode trapping" caused by the stratified surface layers, which modifies the pulsation periods more selectively. In this paper we report on Whole Earth Telescope observations of BPM 37093 obtained in 1998 and 1999. Based on a simple analysis of the average period spacing we conclude that a large fraction of the total stellar mass is likely to be crystallized. © ESO 2005.
Authors & Co-Authors
Kanaan, Antonio
Brazil, Florianopolis
Universidade Federal de Santa Catarina
Nitta, Atsuko
United States, Sunspot
Apache Point Observatory
Winget, Don Earl
United States, Austin
The University of Texas at Austin
Kepler, Souza Oliveira
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Montgomery, Michael H.
United States, Austin
The University of Texas at Austin
United Kingdom, Cambridge
Institute of Astronomy
Metcalfe, Travis S.
United States, Austin
The University of Texas at Austin
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Oliveira, H.
Brazil, Florianopolis
Universidade Federal de Santa Catarina
Fraga, Luciano
Brazil, Florianopolis
Universidade Federal de Santa Catarina
Da Costa, A.
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Costa, J. E.S.
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Castanheira, Bárbara Garcia
Brazil, Porto Alegre
Universidade Federal do Rio Grande do Sul
Giovannini, Odilon
Brazil, Rio Grande
Ucs
Nather, R. Edward
United States, Austin
The University of Texas at Austin
Mukadam, Anjum S.
United States, Austin
The University of Texas at Austin
Kawaler, Steven D.
United States, Ames
Iowa State University
O'Brien, M. Sean
United States, Ames
Iowa State University
Reed, Michael D.
United States, Ames
Iowa State University
United States, Springfield
Missouri State University
Kleinman, Scott J.
United States, Sunspot
Apache Point Observatory
Provençal, Judith L.
United States, Newark
University of Delaware
Watson, Todd K.
United States, Georgetown
Southwestern University
Kilkenny, D.
South Africa, Cape Town
South African Astronomical Observatory
Sullivan, Denis J.
New Zealand, Wellington
Victoria University of Wellington
Sullivan, Tiri
New Zealand, Wellington
Victoria University of Wellington
Shobbrook, B.
Australia, Sydney
The University of Sydney
Jiang, Xiaojun
China, Beijing
Chinese Academy of Sciences
Ashoka, B. N.
India, Bengaluru
Indian Space Research Organisation
Seetha, S.
India, Bengaluru
Indian Space Research Organisation
Leibowitz, Elia M.
Israel, Tel Aviv-yafo
Tel Aviv University
Ibbetson, P. A.
Israel, Tel Aviv-yafo
Tel Aviv University
Mendelson, Haim
Israel, Tel Aviv-yafo
Tel Aviv University
Meištas, E. G.
Lithuania
Inst. of Theor. Phys. and Astronomy
Kalytis, Romualdas
Lithuania
Inst. of Theor. Phys. and Astronomy
Ališauskas, D.
Lithuania, Vilnius
Vilniaus Universitetas
O'Donoghue, Darragh E.
South Africa, Cape Town
South African Astronomical Observatory
Buckley, David A.H.
South Africa, Cape Town
South African Astronomical Observatory
Martinez, Peter
South Africa, Cape Town
South African Astronomical Observatory
van Wyk, François G.
South Africa, Cape Town
South African Astronomical Observatory
Stobie, Robert S.
South Africa, Cape Town
South African Astronomical Observatory
Marang, Freddy
South Africa, Cape Town
South African Astronomical Observatory
van Zyl, Liza
South Africa, Cape Town
South African Astronomical Observatory
Ogłoza, W.
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Krzesiński, Jurek
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Zoła, Stanisław
Poland, Krakow
Uniwersytet Pedagogiczny Im. Komisji Edukacji Narodowej
Poland, Krakow
Uniwersytet Jagielloński
Moskalik, Pawel A.
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Breger, Michael
Austria, Vienna
Universität Wien
Stankov, Anamarija Maria
Austria, Vienna
Universität Wien
Silvotti, R.
Italy
Inaf - Osserv. Astron. Capodimonte
Piccioni, Adalberto
Italy, Bologna
Alma Mater Studiorum Università Di Bologna
Vauclair, Gérard P.
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Dolez, Noël
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Chevreton, Michel
France, Paris
L'observatoire de Paris
Deetjen, Jochen L.
Germany, Tubingen
Institut Für Astronomie Und Astrophysik
Dreizler, Stefan
Germany, Tubingen
Institut Für Astronomie Und Astrophysik
Germany, Gottingen
Georg-august-universität Göttingen
Schuh, Sonja L.
Germany, Tubingen
Institut Für Astronomie Und Astrophysik
Germany, Gottingen
Georg-august-universität Göttingen
González-Pérez, Josefa M.
Norway, Tromso
Uit Norges Arktiske Universitet
Østensen, R.
Spain, Santa Cruz de la Palma
Isaac Newton Group
Ulla, A. M.
Spain, Vigo
Universidade de Vigo
Manteiga, Minia
Spain, Vigo
Universidade de Vigo
Suárez, Olga
Spain, Vigo
Universidade de Vigo
Burleigh, Matthew R.
United Kingdom, Leicester
University of Leicester
Barstow, Martin Adrian
United Kingdom, Leicester
University of Leicester
Statistics
Citations: 61
Authors: 61
Affiliations: 33
Identifiers
Doi:
10.1051/0004-6361:20041125
ISSN:
00046361