The first sub-70 minute non-interacting WD-BD system: EPIC212235321

  title={The first sub-70 minute non-interacting WD-BD system: EPIC212235321},
  author={S. L. Casewell and Ian P. Braker and Steven G. Parsons and J. J. Hermes and Matthew R. Burleigh and Claudia Belardi and Alexander Chaushev and Nicolle L. Finch and Manami Roy and Stuart P. Littlefair and M. R. Goad and Erik Dennihy},
  journal={Monthly Notices of the Royal Astronomical Society},
S.L. Casewell acknowledges support from the University of Leicester Institute for Space and Earth Observation and I.P Braker acknowledges support from the University of Leicester College of Science and Engineering. S.G. Parsons acknowledges the support of the Leverhulme Trust. Support for this work was provided by NASA through Hubble Fellowship grant HST-HF2-51357.001-A, awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research… 

Figures and Tables from this paper

Simplified 3D GCM modelling of the irradiated brown dwarf WD 0137−349B

White dwarf–brown dwarf short-period binaries (Porb ≲ 2 h) are some of the most extreme irradiated atmospheric environments known. These systems offer an opportunity to explore theoretical and

Minimum Orbital Period of Precataclysmic Variables

More than 20 precataclysmic variable (pre-CV) systems have now been discovered with very short orbital periods ranging from 250 minutes down to 68 minutes. A pre-CV consists of a white dwarf (WD) or

Environmental effects on the ionisation of brown dwarf atmospheres

Context. Brown dwarfs emit bursts of Hα, white-light flares, and show radio flares and quiescent radio emission. They are suggested to form aurorae, similar to planets in the solar system, but much

Atmospheric regimes and trends on exoplanets and brown dwarfs

  • Xi Zhang
  • Physics, Geology
    Research in Astronomy and Astrophysics
  • 2020
A planetary atmosphere is the outer gas layer of a planet. Besides its scientific significance among the first and most accessible planetary layers observed from space, it is closely connected with

Formation of sdB-stars via common envelope ejection by substellar companions

Common envelope (CE) phases in binary systems where the primary star reaches the tip of the red giant branch are discussed as a formation scenario for hot subluminous B-type (sdB) stars. For some of

Hydrodynamic simulations of disrupted planetary accretion discs inside the core of an AGB star

Volume complete sky surveys provide evidence for a binary origin for the formation of isolated white dwarfs with magnetic fields in excess of a MegaGauss. Interestingly, not a single high-field

Extremely Irradiated Hot Jupiters: Non-oxide Inversions, H− Opacity, and Thermal Dissociation of Molecules

Extremely irradiated hot Jupiters, exoplanets reaching dayside temperatures >2000 K, stretch our understanding of planetary atmospheres and the models we use to interpret observations. While these

Atmospheric Dynamics of Hot Giant Planets and Brown Dwarfs

Groundbased and spacecraft telescopic observations, combined with an intensive modeling effort, have greatly enhanced our understanding of hot giant planets and brown dwarfs over the past ten years.

A planetesimal orbiting within the debris disc around a white dwarf star

A stable 123.4-minute periodic variation in the strength and shape of the Ca ii emission line profiles originating from the debris disc around the white dwarf SDSS J122859.93+104032 is interpreted as the signature of a solid-body planetesimal held together by its internal strength.

Confirming new white dwarf-ultracool dwarf binary candidates

We present the results of a study to discover prospective new white dwarf-L dwarf binaries as identified by their near-infrared excesses in the UKIDSS catalogue. We obtained optical spectra to



Two white dwarfs in ultrashort binaries with detached, eclipsing, likely sub-stellar companions detected by K2

SGP acknowledges the support of the Leverhulme Trust. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework

The K2 Mission: Characterization and Early Results

The K2 mission will make use of the Kepler spacecraft and its assets to expand upon Kepler’s groundbreaking discoveries in the fields of exoplanets and astrophysics through new and exciting

WD 1202-024: the shortest-period pre-cataclysmic variable

Among the 28,000 targeted stars in K2 Field 10 is the white dwarf WD 1202-024 (EPIC 201283111), first noted in the SDSS survey (SDSS 120515.80-024222.7). We have found that this hot white dwarf (Teff

The SuperCOSMOS Sky Survey – III. Astrometry

In this, the third in a series of three papers concerning the SuperCOSMOS Sky Survey, we describe the astrometric properties of the data base. We describe the algorithms employed in the derivation of

Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. I. DENIS J220002.05−303832.9AB

We present the discovery of the common proper motion M9+L0 binary DENIS J220002.05-303832.9AB, identified serendipitously with the SpeX near-infrared imager/spectrograph. Spectral types are derived

High-resolution optical spectroscopy of Praesepe white dwarfs

We present the results of a high-resolution optical spectroscopic study of nine white dwarf candidate members of Praesepe undertaken with the VLT and Ultraviolet and Visual Echelle Spectrograph. We

Initial Results from the Palomar Adaptive Optics Survey of Young Solar-Type Stars: A Brown Dwarf and Three Stellar Companions

We present first results from the Palomar Adaptive Optics Survey of Young Stars conducted at the Hale 5 m telescope. Through direct imaging we have discovered a brown dwarf and two low-mass stellar

Multiwaveband photometry of the irradiated brown dwarf WD0137−349B

Author(s): Casewell, SL; Lawrie, KA; Maxted, PFL; Marley, MS; Fortney, JJ; Rimmer, PB; Littlefair, SP; Wynn, G; Burleigh, MR; Helling, Ch | Abstract: WD0137-349 is a white dwarf-brown dwarf binary

Emission lines in the atmosphere of the irradiated brown dwarf WD0137−349B

ESL acknowledges the support of STFC studentship. SLC acknowledges support from the University of Leicester College of Science and Engineering. CH highlights the financial support of the European

That's How We Roll: The NASA K2 Mission Science Products and Their Performance Metrics

Improvements in K2 operations and science data analysis resulting from 1.5 yr of experience with this new mission concept will support continuation of K2's already high level of scientific productivity in an extended K2 mission.