The HST large programme on NGC 6752 – III. Detection of the peak of the white dwarf luminosity function

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Author
Bedin, L R
Salaris, M
Anderson, J
Libralato, M
Apai, D
Nardiello, D
Rich, R M
Bellini, A
Dieball, A
Bergeron, P
Affiliation
Univ Arizona, Dept Astron
Univ Arizona, Steward Observ
Univ Arizona, Lunar & Planetary Lab
Issue Date
2019-07-17
Keywords
white dwarfs
globular clusters: individual: NGC 6752

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Publisher
OXFORD UNIV PRESS
Citation
L R Bedin, M Salaris, J Anderson, M Libralato, D Apai, D Nardiello, R M Rich, A Bellini, A Dieball, P Bergeron, A J Burgasser, A P Milone, A F Marino, The HST large programme on NGC 6752 – III. Detection of the peak of the white dwarf luminosity function, Monthly Notices of the Royal Astronomical Society, Volume 488, Issue 3, September 2019, Pages 3857–3865, https://doi.org/10.1093/mnras/stz1968
Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Rights
Copyright © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
Abstract
We report on the white dwarf (WD) cooling sequence of the old globular cluster NGC 6752, which is chemically complex and hosts a blue horizontal branch. This is one of the last globular cluster WE) cooling sequences accessible to imaging by the Hubble Space Telescope. Our photometry and completeness tests show that we have reached the peak of the luminosity function of the WD cooling sequence, at a magnitude m(F606w) = 29.4 +/- 0.1, which is consistent with a formal age of similar to 14 Gyr. This age is also consistent with the age from fits to the main-sequence turn-off (13-14 Gyr), reinforcing our conclusion that we observe the expected accumulation of WDs along the cooling sequence.
ISSN
0035-8711
DOI
10.1093/mnras/stz1968
Version
Final published version
Sponsors
NASANational Aeronautics & Space Administration (NASA) [NAS 5-26555]; European Research Council (ERC) under the European Union's Horizon 2020 research innovation programmeEuropean Research Council (ERC) [716082 'GALFOR']; MIUR through the FARE project [R164RM93XW 'SEMPLICE']; European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie GrantEuropean Union (EU) [797100]; University of Padova, Progetto di Ateneo [BIRD178590]; NSERC CanadaNatural Sciences and Engineering Research Council of Canada; MIUR under PRIN programMinistero dell' Istruzione, dell' Universita e della Ricerca (MIUR) [2017Z2HSMF];[HST-GO-15096]
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