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iPTF 16hgs :
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De, KishalayCALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
iPTF 16hgs : A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy
- Artikel/kapitelEngelska2018
Förlag, utgivningsår, omfång ...
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2018-10-15
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American Astronomical Society,2018
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:su-161969
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-161969URI
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https://doi.org/10.3847/1538-4357/aadf8eDOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-369108URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Calcium-rich gap transients represent an intriguing new class of faint and fast-evolving supernovae that exhibit strong [Ca II] emission in their nebular phase spectra. In this paper, we present the discovery and follow-up observations of a faint and fast-evolving transient, iPTF 16hgs, that exhibited a double-peaked light curve. Exhibiting a Type Ib spectrum in the photospheric phase and an early transition to a [Ca II] dominated nebular phase, iPTF 16hgs shows properties consistent with the class of Ca-rich gap transients, with two important exceptions. First, while the second peak of the light curve is similar to other Ca-rich gap transients, the first blue and fast-fading peak (declining over approximate to 2 days) is unique to this source. Second, we find that iPTF 16hgs occurred in the outskirts (projected offset of approximate to 6 kpc approximate to 1.9 R-eff) of a low-metallicity (approximate to 0.4 Z(circle dot)), star-forming, dwarf spiral galaxy. Deep limits from late-time radio observations suggest a low-density environment for the source. If iPTF 16hgs shares explosion physics with the class of Ca-rich gap transients, the first peak can be explained by the presence of 0.01 M-circle dot of Ni-56 in the outer layers the ejecta, reminiscent of some models of He-shell detonations on WDs. However, if iPTF 16hgs is physically unrelated to the class, the first peak is consistent with shock cooling emission (of an envelope with a mass of approximate to 0.08 M-circle dot and radius of approximate to 13 R-circle dot) in a core-collapse explosion of a highly stripped massive star in a close binary system.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Kasliwal, Mansi M.CALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
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Cantwell, ThereseUniv Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England
(författare)
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Cao, YiUniv Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA
(författare)
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Cenko, S. BradleyNASA, Astrophys Sci Div, Goddard Space Flight Ctr, Mail Code 661, Greenbelt, MD 20771 USA;Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA
(författare)
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Gal-Yam, AvishayWeizmann Inst Sci, Dept Particle Phys & Astrophys, Fac Phys, IL-76100 Rehovot, Israel
(författare)
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Johansson, Joel,Dr,1984-Uppsala universitet,Observationell astrofysik(Swepub:uu)joejo234
(författare)
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Kong, AlbertNatl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan;Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan
(författare)
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Kulkarni, Shrinivas R.CALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
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Lunnan, RagnhildStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm Univ, Dept Astron, Oskar Klein Ctr, SE-10691 Stockholm, Sweden(Swepub:su)rlunn
(författare)
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Masci, FrankCALTECH, Infrared Proc & Anal Ctr, MS 100-22, Pasadena, CA 91125 USA
(författare)
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Matuszewski, Matt
(författare)
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Mooley, Kunal P.CALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
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Neill, James D.CALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
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Nugent, Peter E.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA;Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
(författare)
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Ofek, Eran O.Weizmann Inst Sci, Dept Particle Phys & Astrophys, Fac Phys, IL-76100 Rehovot, Israel
(författare)
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Perrott, YvetteCavendish Lab, Astrophys Grp, 19 JJ Thomson Ave, Cambridge CB3 0HE, England
(författare)
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Rebbapragada, Umaa D.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
(författare)
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Rubin, AdamWeizmann Inst Sci, Dept Particle Phys & Astrophys, Fac Phys, IL-76100 Rehovot, Israel
(författare)
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O' Sullivan, DonalCALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USA
(författare)
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Yaron, OferWeizmann Inst Sci, Dept Particle Phys & Astrophys, Fac Phys, IL-76100 Rehovot, Israel
(författare)
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CALTECH, Cahill Ctr Astrophys, 1200 East Calif Blvd, Pasadena, CA 91125 USAUniv Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Astrophysical Journal: American Astronomical Society866:10004-637X1538-4357
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- Av författaren/redakt...
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De, Kishalay
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Kasliwal, Mansi ...
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Cantwell, Theres ...
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Cao, Yi
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Cenko, S. Bradle ...
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Gal-Yam, Avishay
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visa fler...
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Johansson, Joel, ...
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Kong, Albert
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Kulkarni, Shrini ...
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Lunnan, Ragnhild
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Masci, Frank
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Matuszewski, Mat ...
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Mooley, Kunal P.
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Neill, James D.
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Nugent, Peter E.
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Ofek, Eran O.
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Perrott, Yvette
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Rebbapragada, Um ...
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Rubin, Adam
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O' Sullivan, Don ...
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Yaron, Ofer
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visa färre...
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