Browsing by Author "Werner, Klaus"
Now showing items 1-7 of 7
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Analysis of cool DO-type white dwarfs from the Sloan Digital Sky Survey data release 10
Reindl, Nicole; Rauch, Thomas; Werner, Klaus; Kepler, Souza Oliveira; Gänsicke, Boris; Fusillo, Nicola Pietro Gentile (2014) [Journal article]We report on the identification of 22 new cool DO-type white dwarfs (WDs) detected in data release 10 (DR10) of the Sloan Digital Sky Survey (SDSS). Among them, we found one more member of the so-called hot-wind DO WDs, ... -
Discovery of a new PG 1159 (GW Vir) pulsator
Kepler, Souza Oliveira; Fraga, Luciano; Winget, Donald Earl; Bell, Keaton; Córsico, Alejandro Hugo; Werner, Klaus (2014) [Journal article]We report the discovery of pulsations in the spectroscopic PG 1159 type pre-white dwarf SDSS J075415.12 + 085232.18. Analysis of the spectrum by Werner et al. indicated Teff = 120 000 ± 10 000 K, log g = 7.0 ± 0.3, mass ... -
New hydrogen-deficient (pre-) white dwarfs in the Sloan Digital Sky Survey Data Release 10
Werner, Klaus; Rauch, Thomas; Kepler, Souza Oliveira (2014) [Journal article]We have detected 21 new, very hot hydrogen-deficient (pre-) white dwarfs (spectral types O(He), hot DO, PG1159) in the Data Release 10 of the Sloan Digital Sky Survey. We present the results of non-local thermodynamic ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : I. Asteroseismology of the GW Virstars RX J2117+3412, HS 2324+3944, NGC 6905, NGC 1501, NGC 2371, and K 1−16
Córsico, Alejandro Hugo; Uzundag, Murat; Kepler, Souza Oliveira; Althaus, Leandro Gabriel; Silvotti, Roberto; Baran, Andrzej; Vuckovic, Maja; Werner, Klaus; Bell, Keaton; Higgins, Michael (2021) [Journal article]Context. The recent arrival of continuous photometric observations of unprecedented quality from space missions has strongly promoted the study of pulsating stars and caused great interest in the stellar astrophysics ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541
Uzundag, Murat; Córsico, Alejandro Hugo; Kepler, Souza Oliveira; Althaus, Leandro Gabriel; Werner, Klaus; Reindl, Nicole; Bell, Keaton; Higgins, Michael; Rosa, Gabriela Oliveira da; Vuckovic, Maja; Istrate, Alina G. (2021) [Journal article]Context. The Transiting Exoplanet Survey Satellite (TESS) mission is revolutionizing the blossoming area of asteroseismology, particularly of pulsating white dwarfs and pre-white dwarfs, thus continuing the impulse of its ... -
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS : IV. Discovery of two new GW Vir stars : TIC 0403800675 and TIC 1989122424
Uzundag, Murat; Córsico, Alejandro Hugo; Kepler, Souza Oliveira; Althaus, Leandro Gabriel; Werner, Klaus; Reindl, Nicole; Vuckovic, Maja (2022) [Journal article]We present two new GW Vir-type pulsating white dwarf stars, TIC 0403800675 (WD J115727.68-280349.64) and TIC 1989122424 (WD J211738.38-552801.18) discovered in the Transiting Exoplanet Survey Satellite (TESS) photometric ... -
The bright blue side of the night sky : Spectroscopic survey of bright and hot (pre-) white dwarfs
Reindl, Nicole; Islami, Ramazan; Werner, Klaus; Kepler, Souza Oliveira; Pritzkuleit, Max; Dawson, Harry; Dorsch, Matti; Istrate, Alina G.; Pelisoli, Ingrid Domingos; Geier, Stephan; Uzundag, Murat; Provencal, Judith L.; Justham, Stephen (2023) [Journal article]We report on the spectroscopic confirmation of 68 new bright (G = 13.5–17.2 mag) and blue (pre-)white dwarfs (WDs). This finding has allowed us to almost double the number of the hottest (Teff ≥ 60 kK) known WDs brighter ...