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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  
dc.contributor.author
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  
dc.subject.classification
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