onr:"swepub:oai:DiVA.org:su-160115"
Sökning: onr:"swepub:oai:DiVA.org:su-160115" > Nebular Spectroscop...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03609naa a2200553 4500 | |
| 001 | oai:DiVA.org:su-160115 | |
| 003 | SwePub | |
| 008 | 180918s2018 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1601152 URI |
| 024 | 7 | a https://doi.org/10.3847/1538-4357/aacde82 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Sand, D. J.4 aut |
| 245 | 1 0 | a Nebular Spectroscopy of the Blue Bump Type Ia Supernova 2017cbv |
| 264 | c 2018-08-07 | |
| 264 | 1 | b American Astronomical Society,c 2018 |
| 338 | a print2 rdacarrier | |
| 520 | a We present nebular phase optical and near-infrared spectroscopy of the Type Ia supernova (SN) 2017cbv. The early light curves of SN 2017cbv showed a prominent blue bump in the U, B, and g bands lasting for similar to 5 days. One interpretation of the early light curve is that the excess blue light is due to shocking of the SN ejecta against a nondegenerate companion star-a signature of the single degenerate scenario. If this is the correct interpretation, the interaction between the SN ejecta and the companion star could result in significant Ha (or helium) emission at late times, possibly along with other species, depending on the companion star and its orbital separation. A search for Ha emission in our +302 d spectrum yields a nondetection, with a L-H alpha < 8.0 x 10(35) erg s(-1) (given an assumed distance of D = 12.3 Mpc), which we verified by implanting simulated Ha emission into our data. We make a quantitative comparison to models of swept-up material stripped from a nondegenerate companion star and limit the mass of hydrogen that might remain undetected to M-H < 1 x 10(-4) M-circle dot. A similar analysis of helium star related lines yields a M-He < 5 x 10(-4) M-circle dot. Taken at face value, these results argue against a nondegenerate H- or He-rich companion in Roche lobe overflow as the progenitor of SN 2017cbv. Alternatively, there could be weaknesses in the envelope-stripping and radiative transfer models necessary to interpret the strong H and He flux limits. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a supernovae: general | |
| 653 | a supernovae: individual (SN 2017cbv) | |
| 700 | 1 | a Graham, M. L.4 aut |
| 700 | 1 | a Botyanszki, J.4 aut |
| 700 | 1 | a Hiramatsu, D.4 aut |
| 700 | 1 | a McCully, C.4 aut |
| 700 | 1 | a Valenti, S.4 aut |
| 700 | 1 | a Hosseinzadeh, G.4 aut |
| 700 | 1 | a Howell, D. A.4 aut |
| 700 | 1 | a Burke, J.4 aut |
| 700 | 1 | a Cartier, R.4 aut |
| 700 | 1 | a Diamond, T.4 aut |
| 700 | 1 | a Hsiao, E. Y.4 aut |
| 700 | 1 | a Jha, S. W.4 aut |
| 700 | 1 | a Kasen, D.4 aut |
| 700 | 1 | a Kumar, S.4 aut |
| 700 | 1 | a Marion, G. H.4 aut |
| 700 | 1 | a Suntzeff, N.4 aut |
| 700 | 1 | a Tartaglia, Leonardou Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)leta1160 |
| 700 | 1 | a Wheeler, J. C.4 aut |
| 700 | 1 | a Wyatt, S.4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Astrophysical Journald : American Astronomical Societyg 863:1q 863:1x 0004-637Xx 1538-4357 |
| 856 | 4 | u http://arxiv.org/pdf/1804.03666 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-160115 |
| 856 | 4 8 | u https://doi.org/10.3847/1538-4357/aacde8 |
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