Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Dunlap, Bart 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:
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:
Tremblay, Pier-Emmanuel, Fontaine, Gilles, Fusillo, Nicola Pietro Gentile, Dunlap, Bart H., Gänsicke, Boris T., Hollands, Mark A., Hermes, J. J., Marsh, Thomas R., Cukanovaite, Elena, Cunningham, Tim
Publikováno v:
Nature, Volume 565, Issue 7738, 2019, p. 202-205
White dwarfs are stellar embers depleted of nuclear energy sources that cool over billions of years. These stars, which are supported by electron degeneracy pressure, reach densities of 1e7 grams per cubic centimetre in their cores. It has been predi
Externí odkaz:
http://arxiv.org/abs/1908.00370
Autor:
Subasavage, John P., Jao, Wei-Chun, Henry, Todd J., Harris, Hugh C., Dahn, Conard C., Bergeron, Pierre, Dufour, Patrick, Dunlap, Bart H., Barlow, Brad N., Ianna, Philip A., Lepine, Sebastien, Margheim, Steven J.
We present 114 trigonometric parallaxes for 107 nearby white dwarf (WD) systems from both the Cerro Tololo Inter-American Observatory Parallax Investigation (CTIOPI) and the U. S. Naval Observatory Flagstaff Station (NOFS) parallax programs. Of these
Externí odkaz:
http://arxiv.org/abs/1706.00709
We combine all the reliably-measured eigenperiods for hot, short-period ZZ Ceti stars onto one diagram and show that it has the features expected from evolutionary and pulsation theory. To make a more detailed comparison with theory we concentrate on
Externí odkaz:
http://arxiv.org/abs/1611.02579
Akademický článek
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We are conducting a large spectroscopic survey of over 130 Southern ZZ Cetis with the Goodman Spectrograph on the SOAR Telescope. Because it employs a single instrument with high UV throughput, this survey will both improve the signal-to-noise of the
Externí odkaz:
http://arxiv.org/abs/1610.00738
Autor:
Fuchs, J. T., Dunlap, Bart H., Dennihy, E., O'Donoghue, D., Clemens, J. C., Reichart, D. E., Moore, J. P., LaCluyze, A. P., Haislip, J. B., Ivarsen, K. V.
Publikováno v:
MNRAS, 2016, 462: 2382-2395
We present new photometry and spectroscopy of the 94m eclipsing binary LSQ1725-64 that provide insight into the fundamental parameters and evolutionary state of this system. We confirm that LSQ1725-64 is a magnetic cataclysmic variable whose white dw
Externí odkaz:
http://arxiv.org/abs/1608.03283
Autor:
Kaplan, David L., Boyles, Jason, Dunlap, Bart H., Tendulkar, Shriharsh P., Deller, Adam T., Ransom, Scott M., McLaughlin, Maura A., Lorimer, Duncan R.
The recycled pulsar PSR J2222-0137 is one of the closest known neutron stars, with a parallax distance of $267_{-0.9}^{+1.2}\,$pc and an edge-on orbit. We measure the Shapiro delay in the system through pulsar timing with the Green Bank Telescope, de
Externí odkaz:
http://arxiv.org/abs/1406.0488