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dc.contributor.author
Kilic, Mukremin
dc.contributor.author
Corsico, Alejandro Hugo
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Moss, Adam G.
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Jewett, Gracyn
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de Gerónimo, Francisco César
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Althaus, Leandro Gabriel
dc.date.available
2024-05-17T12:44:28Z
dc.date.issued
2023-06
dc.identifier.citation
Kilic, Mukremin; Corsico, Alejandro Hugo; Moss, Adam G.; Jewett, Gracyn; de Gerónimo, Francisco César; et al.; WD J004917.14−252556.81: the most massive pulsating white dwarf; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 522; 2; 6-2023; 2181-2187
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/235610
dc.description.abstract
We present Apache Point Observatory (APO) and Gemini time-series photometry of WD J004917.14−252556.81, an ultramassive DA white dwarf with Teff = 13 020 K and log g = 9.34. We detect variability at two significant frequencies, making J0049−2525 the most massive pulsating white dwarf currently known with M★ = 1.31 M☉ (for a CO core) or 1.26 M☉ (for an ONe core). J0049−2525 does not display any of the signatures of binary mergers, there is no evidence of magnetism, large tangential velocity, or rapid rotation. Hence, it likely formed through single star evolution and is likely to have an ONe core. Evolutionary models indicate that its interior is ≳99 per cent crystallized. Asteroseismology offers an unprecedented opportunity to probe its interior structure. However, the relatively few pulsation modes detected limit our ability to obtain robust seismic solutions. Instead, we provide several representative solutions that could explain the observed properties of this star. Extensive follow-up time-series photometry of this unique target has the potential to discover a significant number of additional pulsation modes that would help overcome the degeneracies in the asteroseismic fits, and enable us to probe the interior of an ≈1.3 M☉ crystallized white dwarf.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
EVOLUTION-STARS
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GENERAL-WHITE DWARFS
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OSCILLATIONS-STARS
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STARS
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VARIABLES
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Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
WD J004917.14−252556.81: the most massive pulsating white dwarf
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-05-07T13:39:28Z
dc.journal.volume
522
dc.journal.number
2
dc.journal.pagination
2181-2187
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Kilic, Mukremin. Oklahoma State University; Estados Unidos
dc.description.fil
Fil: Corsico, Alejandro Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.description.fil
Fil: Moss, Adam G.. Oklahoma State University; Estados Unidos
dc.description.fil
Fil: Jewett, Gracyn. Oklahoma State University; Estados Unidos
dc.description.fil
Fil: de Gerónimo, Francisco César. Pontificia Universidad Católica de Chile; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.description.fil
Fil: Althaus, Leandro Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stad1113
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/522/2/2181/7129018
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