Circumstellar disks of planetary debris are now known or suspected to closely orbit
hundreds of white dwarf stars. To date, both data and theory support disks that are entirely …

We present a catalogue of white dwarf candidates selected from the second data release of
Gaia (DR2). We used a sample of spectroscopically confirmed white dwarfs from the Sloan …

It has long been suspected that metal-polluted white dwarfs (types DAZ, DBZ, and DZ) and
white dwarfs with dusty disks possess planetary systems, but a specific physical mechanism …

The search for planets around white dwarf stars, and evidence for dynamical instability
around them in the form of atmospheric pollution and circumstellar disks, raises questions …

Chemical compositions are determined based on high-resolution spectroscopy for 137
candidate extremely metal-poor (EMP) stars selected from the Sloan Digital Sky Survey …

This paper presents combined Spitzer IRAC and Hubble COS results for a double-blind
survey of 195 single and 22 wide binary white dwarfs for infrared excesses and atmospheric …

Exoplanets have been observed at many stages of their host star's life, including the main-
sequence (MS), subgiant and red giant branch stages. Also, polluted white dwarfs (WDs) …

White dwarfs whose atmospheres are polluted by terrestrial-like planetary debris have
become a powerful and unique tool to study evolved planetary systems. This paper presents …

Debris discs which orbit white dwarfs are signatures of remnant planetary systems. We
present 12 yr of optical spectroscopy of the metal-polluted white dwarf SDSS J1228+ 1040 …

We study the stability of systems of three giant planets orbiting 3–8 M⊙ stars at orbital
distances of> 10 au as the host star ages through the main sequence (MS) and well into the …