3.9k citations · 18.7k across the 302 of their papers we have counts for
20 papers · 1 filter
Properties of the Eclipsing Double-White Dwarf Binary NLTT 11748
David L. Kaplan, Thomas R. Marsh, Arielle N. Walker +9
We present high-quality ULTRACAM photometry of the eclipsing detached double-white dwarf binary NLTT 11748. This system consists of a carbon/oxygen white dwarf and an extremely-low…
Two new AM Canum Venaticorum binaries from the Sloan Digital Sky Survey III
P. J. Carter, B. T. Gänsicke, D. Steeghs +6
The AM Canum Venaticorum (AM CVn) binaries are a rare group of ultra-short period, mass-transferring white dwarf binaries, some of which may be Type Ia supernova progenitors. More…
Timing variations in the secondary eclipse of NN Ser
S. G. Parsons, T. R. Marsh, M. C. P. Bours +6
The eclipsing white dwarf plus main-sequence binary NN Serpentis provides one of the most convincing cases for the existence of circumbinary planets around evolved binaries. The ex…
Optical transmission photometry of the highly inflated exoplanet WASP-17b
J. Bento, P. J. Wheatley, C. M. Copperwheat +7
We present ground-based high-precision observations of the transit of WASP-17b using the multi-band photometer ULTRACAM on ESO's NTT in the context of performing transmission spect…
The AM CVn binary SDSS J173047.59+554518.5
P. J. Carter, D. Steeghs, T. R. Marsh +4
The AM Canum Venaticorum (AM CVn) binaries are a rare group of hydrogen-deficient, ultra-short period, mass-transferring white dwarf binaries, and are possible progenitors of type…
EL CVn-type binaries - Discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems
P. F. L. Maxted, S. Bloemen, U. Heber +21
The star 1SWASP J024743.37-251549.2 was recently discovered to be a binary star in which an A-type dwarf star eclipses the remnant of a disrupted red giant star (WASP0247-25B). The…
Binaries discovered by the MUCHFUSS project; FBS 0117+396: An sdB+dM binary with a pulsating primary
R. H. Østensen, S. Geier, V. Schaffenroth +16
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (muchfuss) aims to discover subdwarf-B stars with massive compact companions such as overmassive wh…
The planets around NN Ser: still there
T. R. Marsh, S. G. Parsons, M. C. P. Bours +6
We present 25 new eclipse times of the white dwarf binary NN Ser taken with the high-speed camera ULTRACAM on the WHT and NTT, the RISE camera on the Liverpool Telescope, and HAWK-…
A magnetic white dwarf in a detached eclipsing binary
S. G. Parsons, T. R. Marsh, B. T. Gänsicke +4
SDSS J030308.35+005444.1 is a close, detached, eclipsing white dwarf plus M dwarf binary which shows a large infrared excess which has been interpreted in terms of a circumbinary d…
ULTRACAM z'-band Detection of the Secondary Eclipse of WASP-12b
D. Föhring, V. S. Dhillon, Nikku Madhusudhan +4
We present z'-band secondary eclipse photometry of the highly irradiated hot Jupiter WASP-12b using ULTRACAM on the 4.2m William Herschel Telescope. We measure a decrease in flux o…
Hot subdwarf stars in close-up view IV. Helium abundances and the He isotopic anomaly of subdwarf B star
S. Geier, U. Heber, H. Edelmann +5
Atmospheric parameters and helium abundances of 44 bright subdwarf B stars have been determined. More than half of our sample consists of newly discovered stars from the Edinburgh…
Multi-periodic pulsations of a stripped red giant star in an eclipsing binary
Pierre F. L. Maxted, Aldo M. Serenelli, Andrea Miglio +8
Low mass white dwarfs are the remnants of disrupted red giant stars in binary millisecond pulsars and other exotic binary star systems. Some low mass white dwarfs cool rapidly, whi…
Evidence for quiescent synchrotron emission in the black hole X-ray transient Swift J1357.2-0933
T. Shahbaz, D. M. Russell, C. Zurita +4
We present high time-resolution ULTRACAM optical and NOTCam infrared observations of the edge-on black hole X-ray transient Swift J1357.2-0933. Our data taken in 2012 and 2013 show…
On the eclipsing cataclysmic variable star HBHA 4705-03
A. Rutkowski, T. Ak, T. R. Marsh +1
We present observations and analysis of a new eclipsing binary HBHA 4705-03. Using decomposition of the light curve into accretion disk and hot spot components, we estimated photom…
Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands
C. M. Copperwheat, P. J. Wheatley, J. Southworth +6
Transmission spectroscopy has been successfully used from both the ground and in space to characterise the atmospheres of transiting exoplanets. This technique is challenging from…
The Gravitational Universe
The eLISA Consortium, :, P. Amaro Seoane +158
The last century has seen enormous progress in our understanding of the Universe. We know the life cycles of stars, the structure of galaxies, the remnants of the big bang, and hav…
A Massive Pulsar in a Compact Relativistic Binary
John Antoniadis, Paulo C. C. Freire, Norbert Wex +19
Many physically motivated extensions to general relativity (GR) predict significant deviations in the properties of spacetime surrounding massive neutron stars. We report the measu…
A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae
S. Geier, T. R. Marsh, B. Wang +17
Type Ia supernovae (SN Ia) are the most important standard candles for measuring the expansion history of the universe. The thermonuclear explosion of a white dwarf can explain the…
Orbital periods and Accretion disc structure of four AM CVn systems
T. Kupfer, P. J. Groot, D. Levitan +4
Phase-resolved spectroscopy of four AM CVn systems obtained with the William Herschel Telescope and the Gran Telescopio de Canarias (GTC) is presented. SDSS\,J120841.96+355025.2 wa…
A J-band detection of the sub-stellar mass donor in SDSS J1433+1011
S. P. Littlefair, C. D., J. Savoury +7
We present time-resolved J-band spectroscopy of the short period cataclysmic variable SDSS J143317.78+101123.3. We detect absorption lines from the sub-stellar donor star in this s…