Results 11 to 20 of about 2,994,184 (253)

An overview of white dwarf stars [PDF]

EPJ Web of Conferences, 2013
We present a brief summary of what is currently known about white dwarf stars, with an emphasis on their evolutionary and internal properties. As is well known, white dwarfs represent the end products of stellar evolution for the vast majority of stars ...
Charpinet S., Brassard P., Fontaine G., Randall S.K., Van Grootel V.   +4 more
doaj   +2 more sources

WD0837+185: THE FORMATION AND EVOLUTION OF AN EXTREME MASS-RATIO WHITE-DWARF-BROWN-DWARF BINARY IN PRAESEPE

, 2012
There is a striking and unexplained dearth of brown dwarf companions in close orbits (
M. R. Burleigh (7590149), S. T. Hodgkin (7589795), Sarah L. Casewell (7627856), G. A. Wynn (7601708), P. D. Dobbie (7589999), K. A. Lawrie (7629797), R. F. Jameson (7590425), R. D. Alexander (7603424), R. Napiwotzki (7579697)   +8 more
core   +8 more sources

ULTRACAM observations of two accreting white dwarf pulsators [PDF]

, 2009
In this paper, we present high time-resolution observations of GW Librae (GW Lib) and SDSS J161033.64-010223.3 (SDSS 1610) - two cataclysmic variables which have shown periodic variations attributed to non-radial pulsations of the white dwarf (WD).
Southworth, J., Copperwheat, C.M., Copperwheat, C. M., Woudt, P. A., Steeghs, D., Gaensicke, B. T., Dhillon, V. S., Littlefair, S.P., Woudt, P.A., Gänsicke, B.T., Warner, Brian, Marsh, T.R., Warner, B., Dhillon, V.S., Littlefair, S. P., Marsh, T. R.   +15 more
core   +1 more source

The evolutionary state of short-period magnetic white dwarf binaries [PDF]

, 2012
We present phase-resolved spectroscopy of two new short-period low accretion rate magnetic binaries, SDSS J125044.42+154957.3 (Porb= 86 min) and SDSS J151415.65+074446.5 (Porb= 89 min).
Marsh, Tom, J. Girven, Gänsicke, B. T., Copperwheat, C. M., S. G. Parsons, Breedt, E., Girven, Jonathan, Parsons, S. G., A. J. Drake, E. Breedt, Gänsicke, B. T. (Boris T.), Drake, A. J., Girven, J., T. R. Marsh, B. T. Gänsicke, Marsh, T. R.   +15 more
core   +1 more source

Atmospheres of brown dwarfs [PDF]

, 2014
ChH highlights financial support of the European Community under the FP7 by an ERC starting grant. SLC acknowledges financial support of University of LeicesterBrown Dwarfs are the coolest class of stellar objects known to date. Our present perception is
Casewell, Sarah, Helling, Christiane
core   +1 more source

Magnetic white dwarf stars [PDF]

, 1996
NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Three aspects of magnetic white dwarf stars are studied to aid in the understanding of stellar evolution. A survey of ~ 50 DC white
Putney, Angela
core   +1 more source

The Gaia white dwarf population within 100 pc of the Sun [PDF]

, 2018
The recent Gaia Data Release 2 has provided an unprecedented sample of the local white dwarf population. The high astrometric resolution and the photometry provided by Gaia allows to build a clean magnitude-color diagram that, with the aid of the ...
Cantero, C., Rebassa Mansergas, Alberto, Skorobogatov, G., Canals, P., Solano, E., Solano, E, Jiménez Esteban, F. M., Canals, Pere, Rebassa-Mansergas, A., Torres Gil, Santiago, Torres, S., Jiménez-Esteban, F.M.   +11 more
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An Exploration of Spotted White Dwarfs from K2 [PDF]

, 2018
The 21st European Workshop on White Dwarfs was held in Austin, TX from July 23rd to 27th of 2018The Kepler K2 mission has discovered a significant population of white dwarf stars that exhibit photometric variability due to surface inhomogeneities ...
Reding, Joshua S., Clemens, J. Christopher, Hermes, J. J.   +2 more
core   +1 more source

CAST constraints on the axion-electron coupling [PDF]

, 2013
In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axiorecombination, the "BCA processes." Based on a new calculation of this flux, including ...
Barth, Klaus, Belov, A., Hoffmann, D.H.H., Eleftheriadis, Christos, Miller, David W., Zioutas, K., Franz, Jürgen, Englhauser, J., Franz, J., Lakic, B., Villar, J., Gninenko, Sergei, Vieira, Joaquin D., Papaevangelou, Thomas, Riege, H., Ferrer-Ribas, E., Liolios, Anastasios, Walckiers, L., Walckiers, Louis, Kotthaus, R., Eleftheriadis, C., Belov, Alexander, Stewart, L., Pivovaroff, Mike J., Ruz, Jaime, Gómez, Héctor, Villar, José A., Davenport, Martyn, Luzón, Gloria, Jacoby, J., Semertzidis, Y., Königsmann, K., Heinsius, Fritz-Herbert, Savvidis, Ilias, Beltran, Berta, Hasinoff, M.D., Jacoby, Joachim, Vieira, J., Hoffmann, Dieter H. H., Giomataris, I., Vogel, J., Collar, J.I., García, J. A., Hasinoff, Michael D., Miller, D.W., Pivovaroff, M., Lutz, Gerhard, Carmona, J., Jakovcic, K., Jakovčić, Kresimir, Galan, J., Irastorza, I.G., Liolios, A., García, J., Ljubičić, Ante, Redondo, Javier, Friedrich, P., Heinsius, F.H., Collar, Juan I., Giomataris, Ioanis, Englhauser, Jakob, Vogel, Julia K., Kang, Donghwa, Bräuninger, Heinrich, Lutz, G., Fanourakis, G., Dafni, T., Villar, J.A., Krčmar, Milica, Bräuninger, H., Raffelt, G., Friedrich, Peter, Carmona, José Manuel, Di Lella, Luigi, Riege, Hans, Davenport, M., Rodríguez, A., Geralis, Theodoros, Kang, D., Stewart, Laura, Savvidis, I., Vieira, J.D., Fischer, H., Ljubicic, A., Pivovaroff, M.J., Galán, Javier, Collar, J., Fanourakis, George, Beltran, B., Ferrer-Ribas, Ester, Kuster, M., Luzon, G., Carmona, J.M., Papaevangelou, T., Miller, D., Irastorza, Igor Garcia, Zioutas, Konstantin, Ruz, J., Irastorza, I., Garcia, J.A., Hoffmann, D., Fischer, Horst, Dafni, Theopisti, Kousouris, Konstantinos, Raffelt, Georg, Heinsius, F., Kousouris, K., Van Bibber, K., Vogel, J.K., Barth, K., Hasinoff, M., Redondo, J., Di Lella, L., Krcmar, M., Königsmann, Kay, Gninenko, S., Lakić, Biljana, Bibber, Karl van, Gomez, H., Geralis, T., Kotthaus, Rainer, Semertzidis, Yannis   +121 more
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Creating White Dwarf Photospheres In The Laboratory [PDF]

, 2010
We present a preliminary report from the laboratory astrophysics experiments to create macroscopic (similar to 19 cm(3)) hydrogen-plasmas with white dwarf (WD) photospheric conditions (i.e., temperature, electron density). These experiments, performed at
J. L. Ellis, M. H. Montgomery, J. E. Bailey, Leeper, R. J., R. J. Leeper, T. Rauch, D. E. Winget, Winget, D. E., Gomez, M. R., G. A. Rochau, Falcon, R. E., Klaus Werner, Rochau, G. A., Bailey, J. E., Ross E. Falcon, Ellis, J. L., Montgomery, M. H., Matthew R. Gomez   +17 more
core   +1 more source