Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28730
Title: The fast, luminous ultraviolet transient AT2018cow: extreme supernova, or disruption of a star by an intermediate-mass black hole?
Authors: Perley, Daniel A.
Mazzali, Paolo A.
Yan, Lin
Cenko, S. Bradley
Gezari, Suvi
Taggart, Kirsty
Blagorodnova, Nadia
Fremling, Christoffer
Mockler, Brenna
Singh, Avinash
Tominaga, Nozomu
Tanaka, Masaomi
Watson, Alan M.
Ahumada, Tomás
Anupama, G. C.
Ashall, Chris
Becerra, Rosa L.
Bersier, David
Bhalerao, Varun
Bloom, Joshua S.
Butler, Nathaniel R.
Copperwheat, Chris
Coughlin, Michael W.
De, Kishalay
Drake, Andrew J.
Duev, Dmitry A.
Frederick, Sara
González, J. Jesús
Goobar, Ariel
Heida, Marianne
Ho, Anna Y. Q.
Horst, John
Hung, Tiara
Itoh, Ryosuke
Jencson, Jacob E.
Kasliwal, Mansi M.
Kawai, Nobuyuki
Khanam, Tanazza
Kulkarni, Shrinivas R.
Kumar, Brajesh
Kumar, Harsh
Kutyrev, Alexander S.
Lee, William H.
Maeda, Keiichi
Mahabal, Ashish
Murata, Katsuhiro L.
Neill, James D.
Ngeow, Chow-Choong
Penprase, Bryan
PIAN, Elena 
Quimby, Robert
Ramirez-Ruiz, Enrico
Richer, Michael G.
Román-Zúñiga, Carlos G.
Sahu, D. K.
Srivastav, Shubham
Socia, Quentin
Sollerman, Jesper
Tachibana, Yutaro
Taddia, Francesco
Tinyanont, Samaporn
Troja, Eleonora
Ward, Charlotte
Wee, Jerrick
Yu, Po-Chieh
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 484
Issue: 1
First Page: 1031
Abstract: Wide-field optical surveys have begun to uncover large samples of fast (t<SUB>rise</SUB> ≲ 5 d), luminous (M<SUB>peak</SUB> < -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<SUP>14</SUP> 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.
URI: http://hdl.handle.net/20.500.12386/28730
URL: https://academic.oup.com/mnras/article/484/1/1031/5257847
ISSN: 0035-8711
DOI: 10.1093/mnras/sty3420
Bibcode ADS: 2019MNRAS.484.1031P
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
Perley_2019_AT2018cow.pdfPDF editoriale3.17 MBAdobe PDFView/Open
Show full item record

Page view(s)

7
checked on Jan 16, 2021

Download(s)

2
checked on Jan 16, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE