Asteroseismology of RXJ 2117+3412
G. VauclairCNRS/UMR5572, 14 av. E. Belin, 31400 Toulouse, FranceP. MoskalikCopernicus Astronomical Center, ul. Bartycka 18, 00-716 Warsaw, PolandB. PfeifferDepartment of Physics and Astronomy, University of Delaware, Newark, DE 19716, U.S.AM. ChevretonObservatoire de Paris-Meudon, DA EC, 92195 Meudon, FranceN. DolezDepartment of Physics and Astronomy, University of Delaware, Newark, DE 19716, U.S.AB. SerreCNRS/UMR5572, 14 av. E. Belin, 31400 Toulouse, FranceS. J. KleinmanDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AA. E. SansomAstronomy Department, Leicester University, University Road, Leicester, LEI 7RH, UKJ.‐E. SolheimInstitute of Mathematical and Physical Sciences, University of Tromso, P.O. Box 953, N-9001, Tromso, NorwayJuan Antonio BelmonteInstituto de Astrophysica de Canarias, La Laguna, Tenerife, E-38200, SpainM. A. BarstowAstronomy Department, Leicester University, University Road, Leicester, LEI 7RH, UKS. O. KeplerInstituto de Fisica UFRGS, Campus do Vale, C.P. 15051 Goncalves, Porto A legre, RS, BrazilA. KanaanDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AD. E. WingetDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AT. K. WatsonDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AR. E. NatherDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AJ. C. ClemensCalifornia Institute of Technology, Pasadena, CA 91125, U.S.AJ. L. ProvencalDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AA. D. GrauerDepartment of Physics and Astronomy, University of Arkansas, Little Rock, AR 72204, U.S.APaul A. BradleyDepartment of Astronomy, University of Texas, Austin, TX 78712, U.S.AJian Shi YangDepartment of Physics and Astronomy, University of Delaware, Newark, DE 19716, U.S.AΤ. Μ. K. MararIndian Space Research Organization, Airport Road, Vimanapura PO, Bangalore 560 017, IndiaΒ. N. AshokaIndian Space Research Organization, Airport Road, Vimanapura PO, Bangalore 560 017, IndiaE. MeištasInstitute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, LithuaniaА. В. ЧернышевAstronomical Institute, Tashkent 700052, UzbekistanT. MatzehWise Observatory, Tel-Aviv University, Tel-Aviv 69978, IsraelΕ. M. LeibowitzWise Observatory, Tel-Aviv University, Tel-Aviv 69978, IsraelJ. KrzesińskiMt. Suhora Observatory, Cracow Pedagogical University, ul. Podchorg.zych 2, 30-084 Cracow, PolandG. PajdoszMt. Suhora Observatory, Cracow Pedagogical University, ul. Podchorg.zych 2, 30-084 Cracow, PolandS. ZołaMt. Suhora Observatory, Cracow Pedagogical University, ul. Podchorg.zych 2, 30-084 Cracow, Poland
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Аннотация
RXJ 2117+3412 is a transition object between the planetary nebulae and the white dwarfs. The central star is a pulsating PG 1159 type star. We summarize here the results of the campaigns organized between 1992 and 1994. We identify about 50 modes, most of them probably belonging to I = 1. The derived mass of the star is 0.57 MQ. Its distance can be determined from the asteroseismological mass and the atmospheric parameters derived from spectroscopy.
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