The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release
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Astronomy paper on the frequency of metal enrichment in helium-atmosphere white dwarfs using DESI data.
It estimates planetary material frequency around white dwarfs, not research practice.
Astrophysics measurement of metal enrichment frequency in cool helium white dwarfs.
Abstract
ABSTRACT There is an overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estimated to be ≃ 25–50 per cent; inferred from the ongoing or recent accretion of metals on to both hydrogen-atmosphere and warm helium-atmosphere white dwarfs. Now with the unbiased sample of white dwarfs observed by the Dark Energy Spectroscopic Instrument (DESI) survey in their Early Data Release (EDR), we have determined the frequency of metal enrichment around cool-helium atmosphere white dwarfs as 21 ± 3 per cent using a sample of 234 systems. This value is in good agreement with values determined from previous studies. With the current samples we cannot distinguish whether the frequency of planetary accretion varies with system age or host-star mass, but the DESI data release 1 will contain roughly an order of magnitude more white dwarfs than DESI EDR and will allow these parameters to be investigated.
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The record
- Venue
- Monthly Notices of the Royal Astronomical Society Letters
- Topic
- Stellar, planetary, and galactic studies
- Field
- Physics and Astronomy
- Canadian institutions
- University of Toronto
- Funders
- H2020 European Research CouncilCommissariat à l'Énergie Atomique et aux Énergies AlternativesMinisterio de Ciencia e InnovaciónDivision of Astronomical SciencesScience and Technology Facilities CouncilU.S. Department of EnergyEuropean CommissionOffice of ScienceNational Science FoundationImperial College LondonEuropean Space AgencyGordon and Betty Moore Foundation
- Keywords
- White dwarfPhysicsAstrophysicsAtmosphere (unit)Accretion (finance)HeliumAstronomyMassive compact halo objectBrown dwarfBlack dwarfEffective temperatureStars
- Has abstract in OpenAlex
- yes