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Local stellar formation history from the 40 pc white dwarf sample
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Cukanovaite, Elena, Tremblay, Pier-Emmanuel, Toonen, S., Temmink, K. D., Manser, Christopher J., O’Brien, M. W. and McCleery, Jack (2023) Local stellar formation history from the 40 pc white dwarf sample. Monthly Notices of the Royal Astronomical Society, 522 (2). pp. 1643-1661. doi:10.1093/mnras/stad1020 ISSN 1365-2966.
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Official URL: https://doi.org/10.1093/mnras/stad1020
Abstract
We derive the local stellar formation history from the Gaia-defined 40 pc white dwarf sample. This is currently the largest volume-complete sample of white dwarfs for which spectroscopy is available, allowing for classification of the chemical abundances at the photosphere, and subsequently accurate determination of the atmospheric parameters. We create a population synthesis model and show that a uniform stellar formation history for the last ≈10.5 Gyr provides a satisfactory fit to the observed distribution of absolute Gaia G magnitudes. To test the robustness of our derivation, we vary various assumptions in the population synthesis model, including the initial mass function, initial-to-final mass relation, kinematic evolution, binary fraction and white dwarf cooling timescales. From these tests, we conclude that the assumptions in our model have an insignificant effect on the derived relative stellar formation rate as a function of look-back time. However, the onset of stellar formation (age of Galactic disc) is sensitive to a variety of input parameters including the white dwarf cooling models. Our derived stellar formation history gives a much better fit to the absolute Gaia G magnitudes than most previous studies.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
Publisher: | Oxford University Press (OUP) | ||||||||
ISSN: | 1365-2966 | ||||||||
Official Date: | June 2023 | ||||||||
Dates: |
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Volume: | 522 | ||||||||
Number: | 2 | ||||||||
Page Range: | pp. 1643-1661 | ||||||||
DOI: | 10.1093/mnras/stad1020 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved. | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Copyright Holders: | © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society | ||||||||
Date of first compliant deposit: | 13 July 2023 | ||||||||
Date of first compliant Open Access: | 13 July 2023 | ||||||||
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