The frequency of planetary debris around young white dwarfs
D Koester, BT Gänsicke, J Farihi - Astronomy & Astrophysics, 2014 - aanda.org
Context. Heavy metals in the atmospheres of white dwarfs are thought in many cases to be
accreted from a circumstellar debris disk, which was formed by the tidal disruption of a rocky …
accreted from a circumstellar debris disk, which was formed by the tidal disruption of a rocky …
Ancient planetary systems are orbiting a large fraction of white dwarf stars
B Zuckerman, C Melis, B Klein… - The Astrophysical …, 2010 - iopscience.iop.org
Infrared studies have revealed debris likely related to planet formation in orbit around∼ 30%
of youthful, intermediate mass, main-sequence stars. We present evidence, based on …
of youthful, intermediate mass, main-sequence stars. We present evidence, based on …
The chemical diversity of exo-terrestrial planetary debris around white dwarfs
BT Gänsicke, D Koester, J Farihi… - Monthly Notices of …, 2012 - academic.oup.com
Abstract We present Hubble Space Telescope (HST) ultraviolet spectroscopy of the white
dwarfs PG 0843+ 516, PG 1015+ 161, SDSS 1228+ 1040, and GALEX 1931+ 0117, which …
dwarfs PG 0843+ 516, PG 1015+ 161, SDSS 1228+ 1040, and GALEX 1931+ 0117, which …
New chondritic bodies identified in eight oxygen-bearing white dwarfs
We present observations and analyses of eight white dwarf stars (WDs) that have accreted
rocky material from their surrounding planetary systems. The spectra of these helium …
rocky material from their surrounding planetary systems. The spectra of these helium …
Compositions of planetary debris around dusty white dwarfs
S Xu, P Dufour, B Klein, C Melis… - The Astronomical …, 2019 - iopscience.iop.org
The photospheres of some white dwarfs (WDs) are" polluted" by accretion of material from
their surrounding planetary debris. WDs with dust disks are often heavily polluted and high …
their surrounding planetary debris. WDs with dust disks are often heavily polluted and high …
The frequency of gaseous debris discs around white dwarfs
ABSTRACT A total of 1–3 per cent of white dwarfs are orbited by planetary dusty debris
detectable as infrared emission in excess above the white dwarf flux. In a rare subset of …
detectable as infrared emission in excess above the white dwarf flux. In a rare subset of …
Likely detection of water-rich asteroid debris in a metal-polluted white dwarf
The cool white dwarf SDSS J124231. 07+ 522626.6 exhibits photospheric absorption lines
of eight distinct heavy elements in medium resolution optical spectra, notably including …
of eight distinct heavy elements in medium resolution optical spectra, notably including …
Elemental compositions of two extrasolar rocky planetesimals
S Xu, M Jura, D Koester, B Klein… - The Astrophysical …, 2014 - iopscience.iop.org
We report Keck/HIRES and Hubble Space Telescope/COS spectroscopic studies of
extrasolar rocky planetesimals accreted onto two hydrogen atmosphere white dwarfs, G29 …
extrasolar rocky planetesimals accreted onto two hydrogen atmosphere white dwarfs, G29 …
The frequency and infrared brightness of circumstellar discs at white dwarfs
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 …
become a powerful and unique tool to study evolved planetary systems. This paper presents …
Constraints on the lifetimes of disks resulting from tidally destroyed rocky planetary bodies
J Girven, CS Brinkworth, J Farihi… - The Astrophysical …, 2012 - iopscience.iop.org
Spitzer IRAC observations of 15 metal-polluted white dwarfs reveal infrared excesses in the
spectral energy distributions of HE 0110− 5630, GD 61, and HE 1349− 2305. All three of …
spectral energy distributions of HE 0110− 5630, GD 61, and HE 1349− 2305. All three of …