Zobrazeno 1 - 10
of 482
pro vyhledávání: '"Dunlap, B."'
Autor:
Reding, Joshua S., Hermes, J. J., Vanderbosch, Z., Dennihy, E., Kaiser, B. C., Mace, C. B., Dunlap, B. H., Clemens, J. C.
Publikováno v:
ApJ 2020, 894, 19
We report the discovery of short-period photometric variability and modulated Zeeman-split hydrogen emission in SDSSJ125230.93-023417.72 (EPIC 228939929), a variable white dwarf star observed at long cadence in \textit{K2} Campaign 10. The behavior i
Externí odkaz:
http://arxiv.org/abs/2003.10450
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
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
We present a homogeneous analysis of 1023 DBZ/DZ(A) and 319 DQ white dwarf stars taken from the Montreal White Dwarf Database. This represents a significant increase over the previous comprehensive studies on these types of objects. We use new trigon
Externí odkaz:
http://arxiv.org/abs/1907.05932
We present a bulk sample analysis of the metal polluted white dwarfs which also host infrared bright dusty debris disks, known to be direct signatures of an active exoplanetary accretion source. We explore the relative positions of these systems in a
Externí odkaz:
http://arxiv.org/abs/1809.07198
Observations of heavy metal pollution in white dwarf stars indicate that metal-rich planetesimals are frequently scattered into star-grazing orbits, tidally disrupted, and accreted onto the white dwarf surface, offering direct insight into the dynami
Externí odkaz:
http://arxiv.org/abs/1801.05443
Autor:
Nicholl, M., Berger, E., Kasen, D., Metzger, B. D., Elias, J., Briceno, C., Alexander, K. D., Blanchard, P. K., Chornock, R., Cowperthwaite, P. S., Eftekhari, T., Fong, W., Margutti, R., Villar, V. A., Williams, P. K. G., Brown, W., Annis, J., Bahramian, A., Brout, D., Brown, D. A., Chen, H. -Y., Clemens, J. C., Dennihy, E., Dunlap, B., Holz, D. E., Marchesini, E., Massaro, F., Moskowitz, N., Pelisoli, I., Rest, A., Ricci, F., Sako, M., Soares-Santos, M., Strader, J.
We present optical and ultraviolet spectra of the first electromagnetic counterpart to a gravitational wave (GW) source, the binary neutron star merger GW170817. Spectra were obtained nightly between 1.5 and 9.5 days post-merger, using the SOAR and M
Externí odkaz:
http://arxiv.org/abs/1710.05456
Autor:
Dennihy, E., Clemens, J. C., Debes, John H., Dunlap, B. H., Kilkenny, D., O'Brien, P. C., Fuchs, J. T.
We present a simple method for identifying candidate white dwarf systems with dusty exoplanetary debris based on a single temperature blackbody model fit to the infrared excess. We apply this technique to a sample of Southern Hemisphere white dwarfs
Externí odkaz:
http://arxiv.org/abs/1709.09675
Autor:
Hermes, J. J., Gaensicke, B. T., Kawaler, Steven D., Greiss, S., Tremblay, P. -E., Fusillo, Nicola Pietro Gentile, Raddi, R., Fanale, S. M., Bell, Keaton J., Dennihy, E., Fuchs, J. T., Dunlap, B. H., Clemens, J. C., Montgomery, M. H., Winget, D. E., Chote, P., Marsh, T. R., Redfield, S.
We present photometry and spectroscopy for 27 pulsating hydrogen-atmosphere white dwarfs (DAVs, a.k.a. ZZ Ceti stars) observed by the Kepler space telescope up to K2 Campaign 8, an extensive compilation of observations with unprecedented duration (>7
Externí odkaz:
http://arxiv.org/abs/1709.07004
Autor:
Hermes, J. J., Kawaler, Steven D., Romero, A. D., Kepler, S. O., Tremblay, P. -E., Bell, Keaton J., Dunlap, B. H., Montgomery, M. H., Gaensicke, B. T., Clemens, J. C., Dennihy, E., Redfield, S.
Using patterns in the oscillation frequencies of a white dwarf observed by K2, we have measured the fastest rotation rate, 1.13(02) hr, of any isolated pulsating white dwarf known to date. Balmer-line fits to follow-up spectroscopy from the SOAR tele
Externí odkaz:
http://arxiv.org/abs/1704.08690