Zobrazeno 1 - 10
of 214
pro vyhledávání: '"Bischoff, Kim"'
Autor:
Bischoff-Kim, Agnes
To date, pulsational variability has been measured from nearly 70 DBVs and 500 DAVs, with only a fraction of these having been the subjects of asteroseismic analysis. One way to approach white dwarf asteroseismology is forward modeling, where one ass
Externí odkaz:
http://arxiv.org/abs/2307.13796
All single stars that are born with masses up to 8.5 - 10 $M_\odot$ will end their lives as a white dwarf (WD) star. In this evolutionary stage, WDs enter the cooling sequence, where the stars radiate away their thermal energy, and are basically cool
Externí odkaz:
http://arxiv.org/abs/2303.08887
Autor:
Córsico, Alejandro H., Uzundag, Murat, Kepler, S. O., Silvotti, Roberto, Althaus, Leandro G., Koester, Detlev, Baran, Andrzej S., Bell, Keaton J., Bischoff-Kim, Agnès, Hermes, J. J., Kawaler, Steve D., Provencal, Judith L., Winget, Don E., Montgomery, Michael H., Bradley, Paul A., Kleinman, S. J., Nitta, Atsuko
Publikováno v:
A&A 659, A30 (2022)
The collection of high-quality photometric data by space telescopes is revolutionizing the area of white-dwarf asteroseismology. Among the different kinds of pulsating white dwarfs, there are those that have He-rich atmospheres, and they are called D
Externí odkaz:
http://arxiv.org/abs/2111.15551
Akademický článek
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Autor:
Bell, Keaton J., Córsico, Alejandro H., Bischoff-Kim, Agnès, Althaus, Leandro G., Bradley, P. A., Calcaferro, Leila M., Montgomery, M. H., Uzundag, Murat, Baran, Andrzej S., Bognár, Zs., Charpinet, S., Ghasemi, H., Hermes, J. J.
Publikováno v:
A&A 632, A42 (2019)
Pulsation frequencies reveal the interior structures of white dwarf stars, shedding light on the properties of these compact objects that represent the final evolutionary stage of most stars. Two-minute cadence photometry from TESS will record pulsat
Externí odkaz:
http://arxiv.org/abs/1910.04180
Akademický článek
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Autor:
Agnès Bischoff-Kim
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 183 (2024)
We perform the asteroseismic fitting of four DAVs using a grid of WDEC models with chemical profiles that closely mimic those of the LPCODE models and compare them with published asteroseismic fitting results using the LPCODE. These four objects are
Externí odkaz:
https://doaj.org/article/92d70963bc564409b822d4d0803a8a60
Autor:
Agnès Bischoff-Kim, Keaton J. Bell
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 27 (2024)
With space missions such as Kepler, TESS, and Gaia, we have a wealth of data on pulsating white dwarfs that can be leveraged in white dwarf asteroseismology. We address the question of the proportion of white dwarfs with thin hydrogen layers versus t
Externí odkaz:
https://doaj.org/article/080b5b6acb504794990cf8b3a8517121
Autor:
Bischoff-Kim, Agnes, Provencal, J. L., Bradley, P. A., Montgomery, M. H., Shipman, H. L., Harrold, Samuel T., Howard, B., Strickland, W., Chandler, D., Campbell, D., Arredondo, A., Linn, R., Russell, D. P., Doyle, D., Brickhouse, A., Peters, D., Kim, S. -L., Jiang, X. J., Mao, Y-N., Kusakin, A. V., Sergeev, A. V., Andreev, M., Velichko, S., Janulis, R., Pakstiene, E., Alicavus, F., Horoz, N., Zola, S., Ogloza, W., Koziel-Wierzbowska, D., Kundera, T., Jableka, D., Debski, B., Baran, A., Meingast, S., Nagel, T., Loebling, L., Heinitz, C., Hoyer, D., Bognar, Zs., Castanheira, B. G.
We report on the analysis of 34 years of photometric observations of the pulsating helium atmosphere white dwarf GD358. The complete data set includes archival data from 1982-2006, and 1195.2 hours of new observations from 2007- 2016. From this data
Externí odkaz:
http://arxiv.org/abs/1810.11708
The White Dwarf Evolution Code (WDEC), written in Fortran, makes models of white dwarf stars. It is fast, versatile, and includes the latest physics. The code evolves hot (~ 100,000 K) input models down to a chosen effective temperature by relaxing t
Externí odkaz:
http://arxiv.org/abs/1803.03848