112 citations · 654 across the 16 of their papers we have counts for
16 papers
The Heating and Pulsations of V386 Serpentis after its 2019 Dwarf Nova Outburst
Paula Szkody, Patrick Godon, Boris T. Gaensicke +10
Following the pulsation spectrum of a white dwarf through the heating and cooling involved in a dwarf nova outburst cycle provides a unique view of the changes to convective drivin…
I Spy Transits and Pulsations: Empirical Variability in White Dwarfs Using Gaia and the Zwicky Transient Facility
Joseph A. Guidry, Zachary P. Vanderbosch, J. J. Hermes +13
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…
The pulsating white dwarf G117-B15A: still the most stable optical clock known
S. O. Kepler, D. E. Winget, Zachary P. Vanderbosch +14
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, varie…
WD1032+011, an inflated brown dwarf in an old eclipsing binary with a white dwarf
S. L. Casewell, C. Belardi, S. G. Parsons +11
We present the discovery of only the third brown dwarf known to eclipse a non-accreting white dwarf. Gaia parallax information and multi-colour photometry confirm that the white dw…
The McDonald Observatory search for pulsating sdA stars: asteroseismic support for multiple populations
Keaton J. Bell, Ingrid Pelisoli, S. O. Kepler +8
Context. The nature of the recently identified "sdA" spectroscopic class of star is not well understood. The thousands of known sdAs have H-dominated spectra, spectroscopic surface…
Two white dwarfs in ultrashort binaries with detached, eclipsing, likely substellar companions detected by K2
S. G. Parsons, J. J. Hermes, T. R. Marsh +19
Using data from the extended Kepler mission in K2 Campaign 10 we identify two eclipsing binaries containing white dwarfs with cool companions that have extremely short orbital peri…
Four New Massive Pulsating White Dwarfs Including an Ultramassive DAV
Brandon Curd, A. Gianninas, Keaton J. Bell +5
We report the discovery of four massive () ZZ Ceti white dwarfs, including an ultramassive star. We obtained ground based, time-series photometry…
Pruning The ELM Survey: Characterizing Candidate Low-Mass White Dwarfs Through Photometric Variability
Keaton J. Bell, A. Gianninas, J. J. Hermes +7
We assess the photometric variability of nine stars with spectroscopic Teff and log(g) values from the ELM Survey that locate them near the empirical extremely low-mass (ELM) white…
Outbursts in two new cool pulsating DA white dwarfs
Keaton J. Bell, J. J. Hermes, M. H. Montgomery +9
The unprecedented extent of coverage provided by Kepler observations recently revealed outbursts in two hydrogen-atmosphere pulsating white dwarfs (DAVs) that cause hours-long incr…
The search for ZZ Ceti stars in the original Kepler mission
S. Greiss, J. J. Hermes, B. T. Gaensicke +11
We report the discovery of 42 white dwarfs in the original Kepler mission field, including nine new confirmed pulsating hydrogen-atmosphere white dwarfs (ZZ Ceti stars). Guided by…
A Dark Spot on a Massive White Dwarf
Mukremin Kilic, Alexandros Gianninas, Keaton J. Bell +7
We present the serendipitous discovery of eclipse-like events around the massive white dwarf SDSS J152934.98+292801.9 (hereafter J1529+2928). We selected J1529+2928 for time-series…
Radius constraints from high-speed photometry of 20 low-mass white dwarf binaries
J. J. Hermes, Warren R. Brown, Mukremin Kilic +10
We carry out high-speed photometry on 20 of the shortest-period, detached white dwarf binaries known and discover systems with eclipses, ellipsoidal variations (due to tidal deform…
Photometric variability in a warm, strongly magnetic DQ white dwarf, SDSS J103655.39+652252.2
Kurtis A. Williams, D. E. Winget, M. H. Montgomery +7
We present the discovery of photometric variability in the DQ white dwarf SDSS J103655.39+652252.2 (SDSS J1036+6522). Time-series photometry reveals a coherent monoperiodic modulat…
SDSS J163030.58+423305.8: A 40 minute Orbital Period Detached White Dwarf Binary
Mukremin Kilic, Warren R. Brown, J. J. Hermes +4
We report the discovery of a new detached, double white dwarf system with an orbital period of 39.8 min. We targeted SDSS J163030.58+423305.8 (hereafter J1630) as part of our radia…
The Shortest Period Detached Binary White Dwarf System
Mukremin Kilic, Warren R. Brown, S. J. Kenyon +6
We identify SDSS J010657.39-100003.3 (hereafter J0106-1000) as the shortest period detached binary white dwarf (WD) system currently known. We targeted J0106-1000 as part of our ra…
The giant planet orbiting the cataclysmic binary DP Leonis
K. Beuermann, J. Buhlmann, J. Diese +13
Planets orbiting post-common envelope binaries provide fundamental information on planet formation and evolution, especially for the yet nearly unexplored class of circumbinary pla…