Lithium pollution of a white dwarf records the accretion of an extrasolar planetesimal
arXiv:2012.12900 · doi:10.1126/science.abd1714
Abstract
Tidal disruption and subsequent accretion of planetesimals by white dwarfs can reveal the elemental abundances of rocky bodies in exoplanetary systems. Those abundances provide information on the composition of the nebula from which the systems formed, analogous to how meteorite abundances inform our understanding of the early Solar System. We report the detection of Li, Na, K and Ca in the atmosphere of the white dwarf Gaia DR2 4353607450860305024, which we ascribe to accretion of a planetesimal. Using model atmospheres, we determine abundance ratios of these elements, and with the exception of Li, they are consistent with meteoritic values in the Solar System. We compare the measured Li abundance to measurements in old stars and to expectations from Big Bang nucleosynthesis.
arXiv commentSub 30Jun2020;acc 4Dec; pub 17Dec2020; This manuscript has been accepted for publication in Science. This version has not undergone final editing. Please refer to the complete version of record at http://www.sciencemag.org/. The manuscript may not be reproduced or used in any manner that does not fall within the fair use provisions of the Copyright Act without the prior, written permission of AAAS
References in corpus (48)
- Planck 2015 results. XIII. Cosmological parameters
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- The Gaia mission
- Gaia Data Release 2: The astrometric solution
- Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
- Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity
- Cosmic-Ray Rejection by Laplacian Edge Detection
- Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
- Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
- A Tidally-Disrupted Asteroid Around the White Dwarf G29-38
- The frequency of planetary debris around young white dwarfs
- A Data Release 2 catalogue of white dwarfs and a comparison with SDSS
- Origin and structure of the Galactic disc(s)
- Ancient planetary systems are orbiting a large fraction of white dwarf stars
- The White Dwarf Initial-Final Mass Relation for Progenitor Stars From 0.85 to 7.5 M
- Accretion and diffusion in white dwarfs. New diffusion timescales and applications to GD362 and G29-38
- Stellar Abundances in the Solar Neighborhood: The Hypatia Catalog
- Circumstellar Debris and Pollution at White Dwarf Stars
- Direct Detection of Galactic Halo Dark Matter
- Chemical Abundances in the Externally Polluted White Dwarf GD 40: Evidence of a Rocky Extrasolar Minor Planet
- On the Spectral Evolution of Cool, Helium-Atmosphere White Dwarfs: Detailed Spectroscopic and Photometric Analysis of DZ Stars
- Standard big bang nucleosynthesis and primordial CNO Abundances after Planck
- The 100 pc White Dwarf Sample in the SDSS Footprint
- A White Dwarf catalogue from Gaia-DR2 and the Virtual Observatory
- Analysis of Helium-Rich White Dwarfs Polluted by Heavy Elements in the Gaia Era
- Polluted White Dwarfs: Constraints on the Origin and Geology of Exoplanetary Material
- An empirical template library of stellar spectra for a wide range of spectral classes, luminosity classes, and metallicities using SDSS BOSS spectra
- The Elemental Abundances (with Uncertainties) of the Most Earth-like Planet
- A New Generation of Cool White Dwarf Atmosphere Models. I. Theoretical Framework and Applications to DZ Stars
- Flux calibration of medium-resolution spectra from 300 nm to 2500 nm: Model reference spectra and telluric correction
- An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey
- Cool DZ white dwarfs I: Identification and spectral analysis
- Compositions of Planetary Debris around Dusty White Dwarfs
- Interpretation and diversity of exoplanetary material orbiting white dwarfs
- An Atlas of Spectrophotometric Landolt Standard Stars
- Are exoplanetesimals differentiated?
- Evolution of lithium in the Milky Way halo, discs and bulge
- Exploring the production and depletion of lithium in the Milky Way stellar disk
- Characterizing the High-Velocity Stars of RAVE: The Discovery of a Metal-Rich Halo Star Born in the Galactic Disk
- Random Forest identification of the thin disk, thick disk and halo Gaia-DR2 white dwarf population
- A New Generation of Cool White Dwarf Atmosphere Models. II. A DZ Star with Collision-Induced Absorption
- Ultracool white dwarfs and the age of the Galactic disc
- Pressure Distortion of the H-He Collision-Induced Absorption at the Photosphere of Cool White Dwarf Stars
- A New Generation of Cool White Dwarf Atmosphere Models. III. WD J2356209: Accretion of a Planetesimal with an Unusual Composition
- Abundances of alpha-Process Elements in Thin-Disk, Thick-Disk, and Halo Stars of the Galaxy: Non-LTE Analysis
- Kinematics of the Galaxy from Cepheids with proper motions from the Gaia DR1 catalogue
- Line Profiles of the Calcium I Resonance Line in Cool Metal-polluted White Dwarfs
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- Current challenges in the physics of white dwarf stars
- The 40 pc sample of white dwarfs from Gaia
- Ne Phase Separation As A Solution To The Ultramassive White Dwarf Cooling Anomaly
- white dwarfs within 40 pc III: spectroscopic observations of new candidates in the southern hemisphere
- Discovery of Beryllium in White Dwarfs Polluted by Planetesimal Accretion
- Polluted White Dwarfs Reveal Exotic Mantle Rock Types on Exoplanets in our Solar Neighborhood
- Lithium depletion boundary, stellar associations, and Gaia
- Spectral analysis of ultra-cool white dwarfs polluted by planetary debris
- Icy Exomoons Evidenced by Spallogenic Nuclides in Polluted White Dwarfs
- The spectral evolution of white dwarfs: where do we stand?
- Carbon dredge-up required to explain the Gaia white dwarf colour-magnitude bifurcation
- PEWDD: A database of white dwarfs enriched by exo-planetary material
- On the role of resonances in polluting white dwarfs by asteroids
- Spectral analysis of cool white dwarfs accreting from planetary systems: from the UV to the optical
- Two New White Dwarfs With Variable Magnetic Balmer Emission Lines
- A cool, magnetic white dwarf accreting planetary debris
- Sub-stellar engulfment by a main sequence star: where is the lithium?
- TDE 2025abcr: A Tidal Disruption Event in the Outskirts of a Massive Galaxy
- A Sequoia stellar candidate with very high 7Li and 9Be
- Search of nearby resolved neutron stars among optical sources