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Sökning: WFRF:(Singhal Jaladh) > Over 500 Days in th...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003566naa a2200553 4500
001oai:DiVA.org:su-221091
003SwePub
008230918s2023 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2210912 URI
0247 a https://doi.org/10.3847/1538-4357/acd5582 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Camacho-Neves, Yssavo4 aut
2451 0a Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt
264 1c 2023
338 a print2 rdacarrier
520 a Type Iax supernovae (SNe Iax) are the largest known class of peculiar white dwarf SNe, distinct from normal Type Ia supernovae (SNe Ia). The unique properties of SNe Iax, especially their strong photospheric lines out to extremely late times, allow us to model their optical spectra and derive the physical parameters of the long-lasting photosphere. We present an extensive spectral timeseries, including 21 new spectra, of SN Iax 2014dt from +11 to +562 days after maximum light. We are able to reproduce the entire timeseries with a self-consistent, nearly unaltered deflagration explosion model from Fink et al. using TARDIS, an open source radiative-transfer code. We find that the photospheric velocity of SN 2014dt slows its evolution between +64 and +148 days, which closely overlaps the phase when we see SN 2014dt diverge from the normal spectral evolution of SNe Ia (+90 to +150 days). The photospheric velocity at these epochs, ∼400–1000 km s−1, may demarcate a boundary within the ejecta below which the physics of SNe Iax and normal SNe Ia differ. Our results suggest that SN 2014dt is consistent with a weak deflagration explosion model that leaves behind a bound remnant and drives an optically thick, quasi-steady-state wind creating the photospheric lines at late times. The data also suggest that this wind may weaken at epochs past +450 days, perhaps indicating a radioactive power source that has decayed away.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
7001 a Jha, Saurabh W.4 aut
7001 a Barna, Barnabas4 aut
7001 a Dai, Mi4 aut
7001 a Filippenko, Alexei V.4 aut
7001 a Foley, Ryan J.4 aut
7001 a Hosseinzadeh, Griffin4 aut
7001 a Howell, D. Andrew4 aut
7001 a Pearson Johansson, Joel,d 1984-u Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)joeljo
7001 a Kelly, Patrick L.4 aut
7001 a Kerzendorf, Wolfgang E.4 aut
7001 a Kwok, Lindsey A.4 aut
7001 a Larison, Conor4 aut
7001 a Magee, Mark R.4 aut
7001 a McCully, Curtis4 aut
7001 a O'Brien, John T.4 aut
7001 a Pan, Yen-Chen4 aut
7001 a Pandya, Viraj4 aut
7001 a Singhal, Jaladh4 aut
7001 a Stahl, Benjamin E.4 aut
7001 a Szalai, Tamás4 aut
7001 a Wieber, Meredith4 aut
7001 a Williamson, Marc4 aut
7102 a Stockholms universitetb Fysikum4 org
7730 t Astrophysical Journalg 951:1q 951:1x 0004-637Xx 1538-4357
8564 u https://doi.org/10.3847/1538-4357/acd558y Fulltext
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-221091
8564 8u https://doi.org/10.3847/1538-4357/acd558

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