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  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/20.500.12386/28261
Title: The delay of shock breakout due to circumstellar material evident in most type II supernovae
Authors: Förster, F.
Moriya, T. J.
Maureira, J. C.
Anderson, J. P.
Blinnikov, S.
BUFANO, FILOMENA 
Cabrera-Vives, G.
Clocchiatti, A.
de Jaeger, T.
Estévez, P. A.
Galbany, L.
González-Gaitán, S.
Gräfener, G.
Hamuy, M.
Hsiao, E. Y.
Huentelemu, P.
Huijse, P.
Kuncarayakti, H.
Martínez, J.
Medina, G.
Olivares E., F.
Pignata, G.
Razza, A.
Reyes, I.
San Martín, J.
Smith, R. C.
Vera, E.
Vivas, A. K.
de Ugarte Postigo, A.
Yoon, S. -C.
Ashall, C.
Fraser, M.
Gal-Yam, A.
Kankare, E.
Le Guillou, L.
Mazzali, P. A.
Walton, N. A.
Young, D. R.
Issue Date: 2018
Journal: NATURE ASTRONOMY 
Number: 2
First Page: 808
Abstract: Type II supernovae (SNe II) originate from the explosion of hydrogen-rich supergiant massive stars. Their first electromagnetic signature is the shock breakout (SBO), a short-lived phenomenon that can last for hours to days depending on the density at shock emergence. We present 26 rising optical light curves of SN II candidates discovered shortly after explosion by the High Cadence Transient Survey and derive physical parameters based on hydrodynamical models using a Bayesian approach. We observe a steep rise of a few days in 24 out of 26 SN II candidates, indicating the systematic detection of SBOs in a dense circumstellar matter consistent with a mass loss rate of M ̇ > 10<SUP>-4</SUP>M<SUB>☉</SUB> yr<SUP>-1</SUP> or a dense atmosphere. This implies that the characteristic hour-timescale signature of stellar envelope SBOs may be rare in nature and could be delayed into longer-lived circumstellar material SBOs in most SNe II.
URI: http://hdl.handle.net/20.500.12386/28261
URL: https://www.nature.com/articles/s41550-018-0563-4
ISSN: 2397-3366
DOI: 10.1038/s41550-018-0563-4
Bibcode ADS: 2018NatAs...2..808F
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Nat.Astr.s41550-018-0563-4.pdf[Administrators only]38.78 MBAdobe PDF
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