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The fast, luminous ...
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Perley, Daniel A.
(author)
The fast, luminous ultraviolet transient AT2018cow : extreme supernova, or disruption of a star by an intermediate-mass black hole?
- Article/chapterEnglish2019
Publisher, publication year, extent ...
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2018-12-22
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Oxford University Press (OUP),2019
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-168412
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-168412URI
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https://doi.org/10.1093/mnras/sty3420DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Wide-field optical surveys have begun to uncover large samples of fast (t(rise) less than or similar to 5 d), luminous (M-peak < 18), blue transients. While commonly attributed to the breakout of a supernova shock into a dense wind, the great distances to the transients of this class found so far have hampered detailed investigation of their properties. We present photometry and spectroscopy from a comprehensive worldwide campaign to observe AT 2018cow (ATLAS 18qqn), the first fast-luminous optical transient to be found in real time at low redshift. Our first spectra (<2 days after discovery) are entirely featureless. A very broad absorption feature suggestive of near-relativistic velocities develops between 3 and 8 days, then disappears. Broad emission features of H and He develop after >10 days. The spectrum remains extremely hot throughout its evolution, and the photospheric radius contracts with time (receding below R < 10 (14) cm after 1 month). This behaviour does not match that of any known supernova, although a relativistic jet within a fallback supernova could explain some of the observed features. Alternatively, the transient could originate from the disruption of a star by an intermediate-mass black hole, although this would require long-lasting emission of highly super-Eddington thermal radiation. In either case, AT 2018cow suggests that the population of fast luminous transients represents a new class of astrophysical event. Intensive follow-up of this event in its late phases, and of any future events found at comparable distance, will be essential to better constrain their origins.
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Mazzali, Paolo A.
(author)
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Yan, Lin
(author)
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Cenko, S. Bradley
(author)
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Gezari, Suvi
(author)
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Taggart, Kirsty
(author)
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Blagorodnova, Nadia
(author)
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Fremling, Christoffer
(author)
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Mockler, Brenna
(author)
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Singh, Avinash
(author)
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Tominaga, Nozomu
(author)
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Tanaka, Masaomi
(author)
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Watson, Alan M.
(author)
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Ahumada, Tomas
(author)
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Anupama, G. C.
(author)
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Ashall, Chris
(author)
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Becerra, Rosa L.
(author)
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Bersier, David
(author)
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Bhalerao, Varun
(author)
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Bloom, Joshua S.
(author)
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Butler, Nathaniel R.
(author)
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Copperwheat, Chris
(author)
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Coughlin, Michael W.
(author)
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De, Kishalay
(author)
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Drake, Andrew J.
(author)
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Duev, Dmitry A.
(author)
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Frederick, Sara
(author)
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Jesus Gonzalez, J.
(author)
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Goobar, ArielStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ariel
(author)
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Heida, Marianne
(author)
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Ho, Anna Y. Q.
(author)
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Horst, John
(author)
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Hung, Tiara
(author)
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Itoh, Ryosuke
(author)
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Jencson, Jacob E.
(author)
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Kasliwal, Mansi M.
(author)
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Kawai, Nobuyuki
(author)
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Khanam, Tanazza
(author)
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Kulkarni, Shrinivas R.
(author)
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Kumar, Brajesh
(author)
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Kumar, Harsh
(author)
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Kutyrev, Alexander S.
(author)
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Lee, William H.
(author)
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Maeda, Keiichi
(author)
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Mahabal, Ashish
(author)
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Murata, Katsuhiro L.
(author)
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Neill, James D.
(author)
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Ngeow, Chow-Choong
(author)
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Penprase, Bryan
(author)
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Pian, Elena
(author)
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Quimby, Robert
(author)
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Ramirez-Ruiz, Enrico
(author)
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Richer, Michael G.
(author)
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Roman-Zuniga, Carlos G.
(author)
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Sahu, D. K.
(author)
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Srivastav, Shubham
(author)
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Socia, Quentin
(author)
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Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle
(author)
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Tachibana, Yutaro
(author)
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Taddia, FrancescoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ftadd
(author)
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Tinyanont, Samaporn
(author)
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Troja, Eleonora
(author)
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Ward, Charlotte
(author)
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Wee, Jerrick
(author)
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Yu, Po-Chieh
(author)
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Stockholms universitetFysikum
(creator_code:org_t)
Related titles
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In:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)484:1, s. 1031-10490035-87111365-2966
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Perley, Daniel A ...
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Mazzali, Paolo A ...
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Yan, Lin
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Cenko, S. Bradle ...
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Gezari, Suvi
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Taggart, Kirsty
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show more...
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Blagorodnova, Na ...
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Fremling, Christ ...
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Mockler, Brenna
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Singh, Avinash
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Tominaga, Nozomu
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Tanaka, Masaomi
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Watson, Alan M.
-
Ahumada, Tomas
-
Anupama, G. C.
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Ashall, Chris
-
Becerra, Rosa L.
-
Bersier, David
-
Bhalerao, Varun
-
Bloom, Joshua S.
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Butler, Nathanie ...
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Copperwheat, Chr ...
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Coughlin, Michae ...
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De, Kishalay
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Drake, Andrew J.
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Duev, Dmitry A.
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Frederick, Sara
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Jesus Gonzalez, ...
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Goobar, Ariel
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Heida, Marianne
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Ho, Anna Y. Q.
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Horst, John
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Hung, Tiara
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Itoh, Ryosuke
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Jencson, Jacob E ...
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Kasliwal, Mansi ...
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Kawai, Nobuyuki
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Khanam, Tanazza
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Kulkarni, Shrini ...
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Kumar, Brajesh
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Kumar, Harsh
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Kutyrev, Alexand ...
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Lee, William H.
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Maeda, Keiichi
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Mahabal, Ashish
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Murata, Katsuhir ...
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Neill, James D.
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Ngeow, Chow-Choo ...
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Penprase, Bryan
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Pian, Elena
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Quimby, Robert
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Ramirez-Ruiz, En ...
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Richer, Michael ...
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Roman-Zuniga, Ca ...
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Sahu, D. K.
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Srivastav, Shubh ...
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Socia, Quentin
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Sollerman, Jespe ...
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Tachibana, Yutar ...
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Taddia, Francesc ...
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Tinyanont, Samap ...
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Troja, Eleonora
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Ward, Charlotte
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Wee, Jerrick
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Yu, Po-Chieh
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- NATURAL SCIENCES
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Stockholm University