Zobrazeno 1 - 10
of 767
pro vyhledávání: '"Montgomery, M. H."'
Autor:
Kao, Malia L., Hawkins, Keith, Rogers, Laura K., Bonsor, Amy, Dunlap, Bart H., Sanders, Jason L., Montgomery, M. H., Winget, D. E.
White dwarfs (WDs) polluted by exoplanetary material provide the unprecedented opportunity to directly observe the interiors of exoplanets. However, spectroscopic surveys are often limited by brightness constraints, and WDs tend to be very faint, mak
Externí odkaz:
http://arxiv.org/abs/2405.17667
Autor:
Montgomery, M. H., Dunlap, Bart H.
Accurate models of cooling white dwarfs must treat the energy released as their cores crystallize. This phase transition slows the cooling by releasing latent heat and also gravitational energy, which results from phase separation: liquid C is releas
Externí odkaz:
http://arxiv.org/abs/2312.11647
Autor:
da Rosa, Gabriela Oliveira, Kepler, S. O., Córsico, Alejandro H., Costa, J. E. S., Hermes, J. J., Kawaler, S. D., Bell, Keaton J., Montgomery, M. H., Provencal, J. L., Winget, D. E., Handler, G., Dunlap, Bart, Clemens, J. C., Uzundag, Murat
PG 1159-035 is the prototype of the DOV hot pre-white dwarf pulsators. It was observed during the Kepler satellite K2 mission for 69 days in 59 s cadence mode and by the TESS satellite for 25 days in 20 s cadence mode. We present a detailed asterosei
Externí odkaz:
http://arxiv.org/abs/2208.04791
Autor:
Guidry, Joseph A., Vanderbosch, Zachary P., Hermes, J. J., Barlow, Brad N., Lopez, Isaac D., Boudreaux, Emily M., Corcoran, Kyle A., Bell, Keaton J., Montgomery, M. H., Heintz, Tyler M., Castanheira, Barbara G., Reding, Joshua S., Dunlap, Bart H., Winget, D. E., Winget, Karen I., Kuehne, J. W.
We present a novel method to detect variable astrophysical objects and transient phenomena using anomalous excess scatter in repeated measurements from public catalogs of Gaia DR2 and Zwicky Transient Facility (ZTF) DR3 photometry. We first provide a
Externí odkaz:
http://arxiv.org/abs/2012.00035
Autor:
Kepler, S. O., Winget, D. E., Vanderbosch, Zachary P., Castanheira, Barbara Garcia, Hermes, J. J., Bell, Keaton J., Mullally, Fergal, Romero, Alejandra D., Montgomery, M. H., DeGennaro, Steven, Winget, Karen I., Chandler, Dean, Jeffery, Elizabeth J., Fritzen, Jamile K., Williams, Kurtis A., Chote, Paul, Zola, Staszek
The pulsating hydrogen atmosphere white dwarf star G 117-B15A has been observed since 1974. Its main pulsation period at 215.19738823(63) s, observed in optical light curves, varies by only (5.12+/-0.82)x10^{-15} s/s and shows no glitches, as pulsars
Externí odkaz:
http://arxiv.org/abs/2010.16062
The standard theory of pulsations deals with the frequencies and growth rates of infinitesimal perturbations in a stellar model. Modes which are calculated to be linearly driven should increase their amplitudes exponentially with time; the fact that
Externí odkaz:
http://arxiv.org/abs/2001.05048
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
Autor:
Vanderbosch, Z., Hermes, J. J., Dennihy, E., Dunlap, B. H., Izquierdo, P., Tremblay, P. E., Cho, P. B., Gaensicke, B. T., Toloza, O., Bell, K. J., Montgomery, M. H., Winget, D. E.
Publikováno v:
ApJ 2020, 897, 171
We report the discovery of a white dwarf exhibiting deep, irregularly shaped transits, indicative of circumstellar planetary debris. Using Zwicky Transient Facility DR2 photometry of ZTF$\,$J013906.17+524536.89 and follow-up observations from the Las
Externí odkaz:
http://arxiv.org/abs/1908.09839
The standard theory of pulsations deals with the frequencies and growth rates of infinitesimal perturbations in a stellar model. Modes which are calculated to be linearly driven should increase their amplitudes exponentially with time; the fact that
Externí odkaz:
http://arxiv.org/abs/1902.05615