Evidence for Late-stage Eruptive Mass Loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova: Pre-explosion Emission and a Rapidly Rising Luminous Transient

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Fältnamn	Indikatorer	Metadata
000		05685naa a2200949 4500
001		oai:DiVA.org:su-178676
003		SwePub
008		200217s2019 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1786762 URI
024	7	a https://doi.org/10.3847/1538-4357/ab55ec2 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 Ho, Anna Y. Q.4 aut
245	1 0	a Evidence for Late-stage Eruptive Mass Loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova :b Pre-explosion Emission and a Rapidly Rising Luminous Transient
264		c 2019-12-18
264	1	b American Astronomical Society,c 2019
338		a print2 rdacarrier
520		a We present detailed observations of ZTF18abukavn (SN2018gep), discovered in high-cadence data from the Zwicky Transient Facility as a rapidly rising (1.4 +/- 0.1 mag hr(-1)) and luminous (M-g,M- peak = -20 mag) transient. It is spectroscopically classified as a broad-lined stripped-envelope supernova (Ic-BL SN). The high peak luminosity (L-bol greater than or similar to 3 x 10(44) erg s(-1)), the short rise time (t(rise) = 3 days in g band), and the blue colors at peak (g-r similar to -0.4) all resemble the high-redshift Ic-BL iPTF16asu, as well as several other unclassified fast transients. The early discovery of SN2018gep (within an hour of shock breakout) enabled an intensive spectroscopic campaign, including the highest-temperature (T-eff greater than or similar to 40,000 K) spectra of a stripped-envelope SN. A retrospective search revealed luminous (M-g similar to M-r approximate to -14 mag) emission in the days to weeks before explosion, the first definitive detection of precursor emission for a Ic-BL. We find a limit on the isotropic gamma-ray energy release E-gamma,E- iso < 4.9 x 10(48) erg, a limit on X-ray emission L-X < 10(40) erg s(-1), and a limit on radio emission nu L-v less than or similar to 10(37) erg s(-1). Taken together, we find that the early (< 10 days) data are best explained by shock breakout in a massive shell of dense circumstellar material (0.02 M-circle dot) at large radii (3 x 10(14) cm) that was ejected in eruptive pre-explosion mass-loss episodes. The late-time (> 10 days) light curve requires an additional energy source, which could be the radioactive decay of Ni-56.
650	7	a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
653		a methods: observational
653		a shock waves
653		a stars: mass-loss
653		a supernovae: individual
653		a surveys
700	1	a Goldstein, Daniel A.4 aut
700	1	a Schulze, Steve4 aut
700	1	a Khatami, David K.4 aut
700	1	a Perley, Daniel A.4 aut
700	1	a Ergon, Mattiasu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)maer0651
700	1	a Gal-Yam, Avishay4 aut
700	1	a Corsi, Alessandra4 aut
700	1	a Andreoni, Igor4 aut
700	1	a Barbarino, Cristinau Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)cbarb
700	1	a Bellm, Eric C.4 aut
700	1	a Blagorodnova, Nadia4 aut
700	1	a Bright, Joe S.4 aut
700	1	a Burns, E.4 aut
700	1	a Cenko, S. Bradley4 aut
700	1	a Cunningham, Virginia4 aut
700	1	a De, Kishalay4 aut
700	1	a Dekany, Richard4 aut
700	1	a Dugas, Alison4 aut
700	1	a Fender, Rob P.4 aut
700	1	a Fransson, Claesu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)frans
700	1	a Fremling, Christoffer4 aut
700	1	a Goldstein, Adam4 aut
700	1	a Graham, Matthew J.4 aut
700	1	a Hale, David4 aut
700	1	a Horesh, Assaf4 aut
700	1	a Hung, Tiara4 aut
700	1	a Kasliwal, Mansi M.4 aut
700	1	a Kuin, N. Paul M.4 aut
700	1	a Kulkarni, S. R.4 aut
700	1	a Kupfer, Thomas4 aut
700	1	a Lunnan, Ragnhildu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)rlunn
700	1	a Masci, Frank J.4 aut
700	1	a Ngeow, Chow-Choong4 aut
700	1	a Nugent, Peter E.4 aut
700	1	a Ofek, Eran O.4 aut
700	1	a Patterson, Maria T.4 aut
700	1	a Petitpas, Glen4 aut
700	1	a Rusholme, Ben4 aut
700	1	a Sai, Hanna4 aut
700	1	a Sfaradi, Itai4 aut
700	1	a Shupe, David L.4 aut
700	1	a Sollerman, Jesperu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)solle
700	1	a Soumagnac, Maayane T.4 aut
700	1	a Tachibana, Yutaro4 aut
700	1	a Taddia, Francescou Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)ftadd
700	1	a Walters, Richard4 aut
700	1	a Wang, Xiaofeng4 aut
700	1	a Yao, Yuhan4 aut
700	1	a Zhang, Xinhan4 aut
710	2	a Stockholms universitetb Institutionen för astronomi4 org
773	0	t Astrophysical Journald : American Astronomical Societyg 887:2q 887:2x 0004-637Xx 1538-4357
856	4	u https://digitalcommons.lsu.edu/cgi/viewcontent.cgi?article=1646&context=physics_astronomy_pubs
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-178676
856	4 8	u https://doi.org/10.3847/1538-4357/ab55ec

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Av författaren/redakt...: Ho, Anna Y. Q.; Goldstein, Danie ...; Schulze, Steve; Khatami, David K ...; Perley, Daniel A ...; Ergon, Mattias; visa fler...; Gal-Yam, Avishay; Corsi, Alessandr ...; Andreoni, Igor; Barbarino, Crist ...; Bellm, Eric C.; Blagorodnova, Na ...; Bright, Joe S.; Burns, E.; Cenko, S. Bradle ...; Cunningham, Virg ...; De, Kishalay; Dekany, Richard; Dugas, Alison; Fender, Rob P.; Fransson, Claes; Fremling, Christ ...; Goldstein, Adam; Graham, Matthew ...; Hale, David; Horesh, Assaf; Hung, Tiara; Kasliwal, Mansi ...; Kuin, N. Paul M.; Kulkarni, S. R.; Kupfer, Thomas; Lunnan, Ragnhild; Masci, Frank J.; Ngeow, Chow-Choo ...; Nugent, Peter E.; Ofek, Eran O.; Patterson, Maria ...; Petitpas, Glen; Rusholme, Ben; Sai, Hanna; Sfaradi, Itai; Shupe, David L.; Sollerman, Jespe ...; Soumagnac, Maaya ...; Tachibana, Yutar ...; Taddia, Francesc ...; Walters, Richard; Wang, Xiaofeng; Yao, Yuhan; Zhang, Xinhan; visa färre...

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