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Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1

The observations reveal that at least seven planets with sizes and masses similar to those of Earth revolve around TRAPPIST-1, and the six inner planets form a near-resonant chain, such that their orbital periods are near-ratios of small integers.
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New Praesepe white dwarfs and the initial mass-final mass relation

We report the spectroscopic confirmation of four further whi te dwarf members of Praesepe. This brings the total number of confirmed white dwarf me mbers to eleven making this the second largest…
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Survival of a brown dwarf after engulfment by a red giant star

The discovery of a brown dwarf in a short period orbit around a white dwarf is reported and the properties of both stars can be directly observed and show that the brown dwarf was engulfed by a red giant but that this had little effect on it.
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RE J0317 – 853: the hottest known highly magnetic DA white dwarf

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The Gaia-ESO Public Spectroscopic Survey

The Gaia-ESO Public Spectroscopic Survey has begun and will obtain high quality spectroscopy of some 100000 Milky Way stars, in the field and in open clusters, down to magnitude 19, systematically ...

White dwarfs in the UKIRT Infrared Deep Sky Survey Large Area Survey: the substellar companion fraction

We present a near-infrared photometric search for unresolved substellar companions and debris discs around white dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey. We…
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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…
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Hubble Space Telescope spectroscopy of the Balmer lines in Sirius B

Sirius B is the nearest and brightest of all white dwarfs, but it is very difficult to observe at visible wavelengths due to the overwhelming scattered light contribution from Sirius A. However, from…
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The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1

We present high time resolution SDSS-g′ and SDSS-z′ light curves of the primary eclipse in SDSS J141126.20+200911.1, together with time-resolved X-Shooter spectroscopy and near-infrared (NIR) JHKs…
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NLTT 5306: the shortest period detached white dwarf+brown dwarf binary

We have spectroscopically confirmed a brown dwarf mass companion to the hydrogen atmosphere white dwarf NLTT 5306. The white dwarf's atmospheric parameters were measured using the Sloan Digital Sky…
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