DOI | Trouver le DOI : https://doi.org/10.1088/2041-8205/778/1/L15 |
---|
Auteur | Rechercher : Zheng, W.; Rechercher : Silverman, J.M.; Rechercher : Filippenko, A.V.; Rechercher : Kasen, D.; Rechercher : Nugent, P.E.; Rechercher : Graham, M.; Rechercher : Wang, X.; Rechercher : Valenti, S.; Rechercher : Ciabattari, F.; Rechercher : Kelly, P.L.; Rechercher : Fox, O.D.; Rechercher : Shivvers, I.; Rechercher : Clubb, K.I.; Rechercher : Cenko, S.B.; Rechercher : Balam, D.1; Rechercher : Howell, D.A.; Rechercher : Hsiao, E.; Rechercher : Li, W.; Rechercher : Howie Marion, G.; Rechercher : Sand, D.; Rechercher : Vinko, J.; Rechercher : Wheeler, J.C.; Rechercher : Zhang, J. |
---|
Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
|
---|
Format | Texte, Article |
---|
Résumé | The Type Ia supernova (SN Ia) 2013dy in NGC 7250 (d ≈ 13.7 Mpc) was discovered by the Lick Observatory Supernova Search. Combined with a prediscovery detection by the Italian Supernova Search Project, we are able to constrain the first-light time of SN 2013dy to be only 0.10 ± 0.05 days (2.4 ± 1.2 hr) before the first detection. This makes SN 2013dy the earliest known detection of an SN Ia. We infer an upper limit on the radius of the progenitor star of R 0 ≲ 0.25 R ⊙, consistent with that of a white dwarf. The light curve exhibits a broken power law with exponents of 0.88 and then 1.80. A spectrum taken 1.63 days after first light reveals a C II absorption line comparable in strength to Si II. This is the strongest C II feature ever detected in a normal SN Ia, suggesting that the progenitor star had significant unburned material. The C II line in SN 2013dy weakens rapidly and is undetected in a spectrum 7 days later, indicating that C II is detectable for only a very short time in some SNe Ia. SN 2013dy reached a B-band maximum of MB = -18.72 ± 0.03 mag ∼17.7 days after first light. © 2013. The American Astronomical Society. All rights reserved. |
---|
Date de publication | 2013 |
---|
Dans | |
---|
Langue | anglais |
---|
Publications évaluées par des pairs | Oui |
---|
Numéro NPARC | 21269861 |
---|
Exporter la notice | Exporter en format RIS |
---|
Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
---|
Identificateur de l’enregistrement | 8048ad61-cb22-4c80-bbcc-637d87e8e20e |
---|
Enregistrement créé | 2013-12-13 |
---|
Enregistrement modifié | 2020-04-22 |
---|