A gravitational-wave-detectable candidate type Ia supernova progenitor

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dc.contributor.authorChickles, Emma T.en
dc.contributor.authorBurdge, Kevin B.en
dc.contributor.authorChakraborty, Joheenen
dc.contributor.authorDhillon, Vik S.en
dc.contributor.authorDraghis, Paulen
dc.contributor.authorMunday, Jamesen
dc.contributor.authorRappaport, Saul A.en
dc.contributor.authorTonry, Johnen
dc.contributor.authorBauer, Evan B.en
dc.contributor.authorBrown, Alex J.en
dc.contributor.authorCastro, Noelen
dc.contributor.authorChakrabarty, Deeptoen
dc.contributor.authorDyer, Martinen
dc.contributor.authorEl-Badry, Kareemen
dc.contributor.authorFrebel, Annaen
dc.contributor.authorFuresz, Gaboren
dc.contributor.authorGarbutt, Jamesen
dc.contributor.authorGreen, Matthew J.en
dc.contributor.authorHouseholder, Aaronen
dc.contributor.authorHughes, Scott A.en
dc.contributor.authorJarvis, Danielen
dc.contributor.authorKara, Erinen
dc.contributor.authorKennedy, Mark R.en
dc.contributor.authorKerry, Paulen
dc.contributor.authorLittlefair, Stuart Pen
dc.contributor.authorMcCormac, Jamesen
dc.contributor.authorMo, Geoffreyen
dc.contributor.authorNg, Masonen
dc.contributor.authorParsons, Stevenen
dc.contributor.authorPelisoli, Ingriden
dc.contributor.authorPike, Eleanoren
dc.contributor.authorPrince, Thomas A.en
dc.contributor.authorRicker, George R.en
dc.contributor.authorvan Roestel, Janen
dc.contributor.authorSahman, Daviden
dc.contributor.authorShen, Ken J.en
dc.contributor.authorSimcoe, Robert A.en
dc.contributor.authorTremblay, Pier-Emmanuelen
dc.contributor.authorVanderburg, Andrewen
dc.contributor.authorWong, Tin Long Sunnyen
dc.date.accessioned2025-07-22T10:59:36Z
dc.date.available2025-07-22T10:59:36Z
dc.date.issued2025-07-09en
dc.description.abstractType Ia supernovae (SNe Ia), critical for studying cosmic expansion, arise from thermonuclear explosions of white dwarfs, but their precise progenitor pathways remain unclear. Growing evidence supports the “double-degenerate scenario,” where two white dwarfs interact. The absence of nondegenerate companions capable of explaining the observed SN Ia rate, along with observations of hypervelocity white dwarfs, interpreted as surviving companions of such systems, provide compelling evidence for this scenario. Upcoming millihertz gravitational-wave observatories like the Laser Interferometer Space Antenna (LISA) are expected to detect thousands of double-degenerate systems, though the most compact known candidate SN Ia progenitors produce marginally detectable signals. Here, we report observations of ATLAS J1138-5139, a binary white dwarf system with an orbital period of just 28 minutes. Our analysis reveals a 1 M☉ carbon-oxygen white dwarf accreting from a high-entropy helium-core white dwarf. Given its mass, the accreting carbon-oxygen white dwarf is poised to trigger a typical-luminosity SN Ia within a few million years, to evolve into a stably transferring AM Canum Venaticorum (or AM CVn) system, or undergo a merger into a massive white dwarf. ATLAS J1138-5139 provides a rare opportunity to calibrate binary evolution models by directly comparing observed orbital parameters and mass-transfer rates closer to merger than any known SN Ia progenitor. Its compact orbit ensures detectability by LISA, demonstrating the potential of millihertz gravitational-wave observatories to reveal a population of SN Ia progenitors on a Galactic scale, paving the way for multimessenger studies offering insights into the origins of these cosmologically significant explosions.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid206en
dc.identifier.citationChickles, E. T., Burdge, K. B., Chakraborty, J., Dhillon, V. S., Draghis, P., Munday, J., Rappaport, S. A., Tonry, J., Bauer, E. B., Brown, A. J., Castro, N., Chakrabarty, D., Dyer, M., El-Badry, K., Frebel, A., Furesz, G., Garbutt, J., Green, M. J., Householder, A., Hughes, S. A., Jarvis, D., Kara, E., Kennedy, M. R. et al (2025) 'A gravitational-wave-detectable candidate type Ia supernova progenitor', The Astrophysical Journal, 987(2), 206 (15pp). https://doi.org/10.3847/1538-4357/add34cen
dc.identifier.doi10.3847/1538-4357/add34cen
dc.identifier.endpage15en
dc.identifier.issn0004637Xen
dc.identifier.issued2
dc.identifier.journaltitleAstrophysical Journalen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/17740
dc.identifier.volume987
dc.language.isoenen
dc.publisherInstitute of Physicsen
dc.rights© 2025. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectType Ia supernovae (SNe Ia)en
dc.subjectCosmic expansionen
dc.subjectWhite dwarfsen
dc.subject~Physics - Journal Articles~en
dc.titleA gravitational-wave-detectable candidate type Ia supernova progenitoren
dc.typeArticle (peer reviewed)en
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