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The ultramassive white dwarfs of the Alpha Persei cluster
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Miller, David R., Caiazzo, Ilaria, Heyl, Jeremy, Richer, Harvey B. and Tremblay, Pier-Emmanuel (2022) The ultramassive white dwarfs of the Alpha Persei cluster. The Astrophysical Journal Letters, 926 (2). L24. doi:10.3847/2041-8213/ac50a5
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Official URL: https://doi.org/10.3847/2041-8213/ac50a5
Abstract
We searched through the entire Gaia EDR3 candidate white dwarf catalog for stars with proper motions and positions that are consistent with them having escaped from the Alpha Persei cluster within the past 81 Myr, the age of the cluster. In this search we found five candidate white dwarf escapees from Alpha Persei and obtained spectra for all of them. We confirm that three are massive white dwarfs sufficiently young to have originated in the cluster. All these are more massive than any white dwarf previously associated with a cluster using Gaia astrometry, and possess some of the most massive progenitors. In particular, the white dwarf Gaia EDR3 4395978097863572, which lies within 25 pc of the cluster center, has a mass of about 1.20 solar masses and evolved from an 8.5 solar-mass star, pushing the upper limit for white dwarf formation from a single massive star, while still leaving a substantial gap between the resulting white dwarf mass and the Chandrasekhar mass.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
| SWORD Depositor: | Library Publications Router | |||||||||
| Library of Congress Subject Headings (LCSH): | White dwarf stars, Stars -- Evolution, Stars -- Clusters | |||||||||
| Journal or Publication Title: | The Astrophysical Journal Letters | |||||||||
| Publisher: | Institute of Physics Publishing, Inc. | |||||||||
| ISSN: | 2041-8205 | |||||||||
| Official Date: | 21 February 2022 | |||||||||
| Dates: |
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| Volume: | 926 | |||||||||
| Number: | 2 | |||||||||
| Article Number: | L24 | |||||||||
| DOI: | 10.3847/2041-8213/ac50a5 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access | |||||||||
| RIOXX Funder/Project Grant: |
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