Results 1 to 10 of about 313,257 (304)

“POP/STARS”

Persona Studies
In 2018, American developer Riot Games introduced their new musical venture – K-pop virtual band K/DA – through a live augmented reality performance opening the League of Legends World Championship Finals.
Andra Ivănescu
doaj   +4 more sources

Catalog of Magnetic White Dwarfs with Hydrogen Dominated Atmospheres

The Astrophysical Journal, 2023
White dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other stellar features,
L. L. Amorim, S. O. Kepler, Baybars Külebi, S. Jordan, A. D. Romero   +4 more
doaj   +1 more source

Do Hydrogen-Deficient Carbon Stars Have Winds? [PDF]

, 2009
We present high resolution spectra of the five known hydrogen-deficient carbon (HdC) stars in the vicinity of the 10830 angstrom line of neutral helium. In R Coronae Borealis (RCB) stars the He I line is known to be strong and broad, often with a P Cygni
Clayton, Geoffrey C., Geballe, T. R., Rao, N. Kameswara   +2 more
core   +3 more sources

An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey [PDF]

, 2003
An initial assessment is made of white dwarf and hot subdwarf stars observed in the Sloan Digital Sky Survey. In a small area of sky (190 square degrees), observed much like the full survey will be, 269 white dwarfs and 56 hot subdwarfs are identified ...
Alan Uomoto, Atsuko Nitta, Boyle B. J., Brian Yanny, Bruce Margon, Conard C. Dahn, Dan Vanden Berk, Daniel Eisenstein, David J. Schlegel, Donald G. York, Donald P. Schneider, Donald Q. Lamb, Dreizler S., Evans D. W., Gary Schmidt, Gillian R. Knapp, Gregory S. Hennessy, Hintzen P., Homeier D., Hugh C. Harris, J. Allyn Smith, J. Brinkmann, James E. Gunn, James Liebert, Jeffrey A. Munn, Jeffrey R. Pier, Jurek Krzesiski, Liebert J., Mark SubbaRao, Matthew J. Collinge, Michael A. Strauss, Nicole M. Silvestri, Patrick B. Hall, Paula Szkody, Pottasch S. R., R. C. Nichol, Reimers D., Robert H. Lupton, Robert Hindsley, S. J. Kleinman, Scott Burles, Scott F. Anderson, Stephen Kent, Suzanne Hawley, Wehrse R., Wickramasinghe D. T., Xiaohui Fan, Zeljko Ivezi   +47 more
core   +1 more source

On the Spectral Evolution of Hot White Dwarf Stars. IV. The Diffusion and Mixing of Residual Hydrogen in Helium-rich White Dwarfs

The Astrophysical Journal, 2023
In the framework of our extensive modeling study of the spectral evolution of white dwarfs, we present here a new set of detailed calculations of the transport of residual hydrogen in helium-rich white dwarfs. First, we investigate the so-called float-up
A. Bédard, P. Bergeron, P. Brassard
doaj   +1 more source

Asteroseismological study of massive ZZ Ceti stars with fully evolutionary models [PDF]

, 2013
We present the first asteroseismological study for 42 massive ZZ Ceti stars based on a large set of fully evolutionary carbon$-$oxygen core DA white dwarf models characterized by a detailed and consistent chemical inner profile for the core and the ...
Althaus, L. G., Córsico, A. H., Fraga, L., Kepler, S. O., Romero, A. D.   +4 more
core   +4 more sources

All-sky Faint DA White Dwarf Spectrophotometric Standards for Astrophysical Observatories: The Complete Sample

The Astrophysical Journal, 2023
Hot DA white dwarfs (DAWDs) have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature T _eff and surface gravity $\mathrm{log}\,g$ , which can
Tim Axelrod, Abhijit Saha, Thomas Matheson, Edward W. Olszewski, Ralph C. Bohlin, Annalisa Calamida, Jenna Claver, Susana Deustua, Jay B. Holberg, Ivan Hubeny, John W. Mackenty, Konstantin Malanchev, Gautham Narayan, Sean Points, Armin Rest, Elena Sabbi, Christopher W. Stubbs   +16 more
doaj   +1 more source

A Comprehensive Spectroscopic Analysis of DB White Dwarfs [PDF]

, 2011
We present a detailed analysis of 108 helium-line (DB) white dwarfs based on model atmosphere fits to high signal-to-noise optical spectroscopy. We derive a mean mass of 0.67 Mo for our sample, with a dispersion of only 0.09 Mo. White dwarfs also showing
A. Beauchamp, A. Gianninas, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Beauchamp, Bergeron, Bergeron, Brassard, Brassard, Böhm, C. Hunter, Deridder, Desharnais, Dufour, Dufour, Dufour, Dufour, Eisenstein, F. Wesemael, Fontaine, Friedrich, G. Fontaine, Gould, Holberg, Holberg, Holberg, Hunter, James Liebert, John, Koester, Liebert, Limoges, Limoges, Lépine, M. T. Ruiz, M.-M. Limoges, Massa, P. Bergeron, Patrick Dufour, Petitclerc, Pierre Dufour, Press, Rex A. Saffer, Tremblay, Tremblay, Tremblay, van Altena, Wesemael, Wickramasinghe   +51 more
core   +1 more source

Galactic Evolution of Beryllium and Oxygen [PDF]

, 2000
We discuss the early evolution of beryllium and oxygen in our Galaxy by comparing abundances of these elements for halo and disk metal-poor stars. Both, O and Be rise as we go progressively to more metal-rich stars, showing a slope 0.41 +-0.09 ([Be/O] vs
Israelian, Garik, Lopez, Ramon Garcia, Rebolo, Rafael   +2 more
core   +2 more sources

High resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia Progenitor Survey III. DA white dwarfs [PDF]

, 2009
Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory (ESO) DOI: 10.1051/0004-6361/200912531Context. The ESO Supernova Ia Progenitor Survey (SPY) took high-resolution spectra of more than 1000 white dwarfs ...
Christlieb, N., Heber, U., Homeier, D., Koester, D., Lisker, T., Napiwotzki, R., Reimers, D., Voss, B.   +7 more
core   +2 more sources