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The white dwarf initial–final mass relation for progenitor stars from 0.85 to 7.5 M ⊙
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Cummings, Jeffrey D., Kalirai, Jason S., Tremblay, Pier-Emmanuel, Ramirez-Ruiz, Enrico and Choi, Jieun (2018) The white dwarf initial–final mass relation for progenitor stars from 0.85 to 7.5 M ⊙. The Astrophysical Journal, 866 (1). 21. doi:10.3847/1538-4357/aadfd6 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.3847/1538-4357/aadfd6
Abstract
We present the initial–final mass relation (IFMR) based on the self-consistent analysis of Sirius B and 79 white dwarfs from 13 star clusters. We have also acquired additional signal on eight white dwarfs previously analyzed in the NGC 2099 cluster field, four of which are consistent with membership. These re-observed white dwarfs have masses ranging from 0.72 to 0.97 M ⊙, with initial masses from 3.0 to 3.65 M ⊙, where the IFMR has an important change in slope that these new data help to observationally confirm. In total, this directly measured IFMR has small scatter (σ = 0.06 M ⊙) and spans from progenitors of 0.85 to 7.5 M ⊙. Applying two different stellar evolutionary models to infer two different sets of white dwarf progenitor masses shows that, when the same model is also used to derive the cluster ages, the resulting IFMR has weak sensitivity to the adopted model at all but the highest initial masses (>5.5 M ⊙). The nonlinearity of the IFMR is also clearly observed with moderate slopes at lower masses (0.08 M final/M initial) and higher masses (0.11 M final/M initial) that are broken up by a steep slope (0.19 M final/M initial) between progenitors from 2.85 to 3.6 M ⊙. This IFMR shows total stellar mass loss ranges from 33% of M initial at 0.83 M ⊙ to 83% of M initial at 7.5 M ⊙. Testing this total mass loss for dependence on progenitor metallicity, however, finds no detectable sensitivity across the moderate range of −0.15 < [Fe/H] < +0.15.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QB Astronomy | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | White dwarf stars, Stars -- Evolution | ||||||||||||
Journal or Publication Title: | The Astrophysical Journal | ||||||||||||
Publisher: | Institute of Physics Publishing, Inc. | ||||||||||||
ISSN: | 0004-637X | ||||||||||||
Official Date: | 5 October 2018 | ||||||||||||
Dates: |
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Volume: | 866 | ||||||||||||
Number: | 1 | ||||||||||||
Article Number: | 21 | ||||||||||||
DOI: | 10.3847/1538-4357/aadfd6 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Copyright Holders: | © 2018. The American Astronomical Society. All rights reserved | ||||||||||||
Date of first compliant deposit: | 18 January 2019 | ||||||||||||
Date of first compliant Open Access: | 21 January 2019 | ||||||||||||
RIOXX Funder/Project Grant: |
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