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Article Dans Une Revue The Astrophysical Journal Année : 2015

A Missing-link in the Supernova-GRB Connection: The Case of SN 2012ap

1 Harvard-Smithsonian Center for Astrophysics
2 Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
3 TIFR - Tata Institute of Fundamental Research
4 SSL - Space Sciences Laboratory [Berkeley]
5 Institute for Theory and Computation, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
6 Department of Physics and Astronomy, York University
7 MPIfR - Max-Planck-Institut für Radioastronomie
8 Departamento de Ciencias Fisicas, Universidad Andrés Bello
9 SNS - Scuola Normale Superiore di Pisa
10 Liverpool John Moores University
11 Stockholm University
12 Hartebeesthoek Radio Astromomy Observatory
13 Departamento de Astronomía, Universidad de Chile
14 University of Colorado
15 Physics Department, New York University, 4 Washington Place, New York
16 NRAO - National Radio Astronomy Observatory [Socorro]
17 CSPAR - Center for Space Plasma and Aeronomic Research [Huntsville]
18 Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University
19 ISAS - Institute of Space and Astronautical Science
20 Department of Physics, Hiroshima University
21 Saitama University
22 Kanazawa University
23 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
24 NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
25 LANL - Los Alamos National Laboratory
26 A.F. Ioffe Physical-Technical Institute
27 GSFC - NASA Goddard Space Flight Center
28 IKI/RAN - Institute of Space Research, Russian Academy of Science
29 LPL - Lunar and Planetary Laboratory [University of Arizona]
30 MPE, Giessenbachstrasse, Postfach 1312, D-85748 Garching, Germany
31 Observatoire de Paris
M. S. Tashiro
  • Fonction : Auteur
Y. Terada
  • Fonction : Auteur
T. Murakami
  • Fonction : Auteur

Résumé

Gamma-ray bursts (GRBs) are characterized by ultra-relativistic outflows, while supernovae are generally characterized by non-relativistic ejecta. GRB afterglows decelerate rapidly, usually within days, because their low-mass ejecta rapidly sweep up a comparatively larger mass of circumstellar material. However, supernovae with heavy ejecta can be in nearly free expansion for centuries. Supernovae were thought to have non-relativistic outflows except for a few relativistic ones accompanied by GRBs. This clear division was blurred by SN 2009bb, the first supernova with a relativistic outflow without an observed GRB. However, the ejecta from SN 2009bb was baryon loaded and in nearly free expansion for a year, unlike GRBs. We report the first supernova discovered without a GRB but with rapidly decelerating mildly relativistic ejecta, SN 2012ap. We discovered a bright and rapidly evolving radio counterpart driven by the circumstellar interaction of the relativistic ejecta. However, we did not find any coincident GRB with an isotropic fluence of more than one-sixth of the fluence from GRB 980425. This shows for the first time that central engines in SNe Ic, even without an observed GRB, can produce both relativistic and rapidly decelerating outflows like GRBs.

Dates et versions

hal-03786605 , version 1 (23-09-2022)

Identifiants

Citer

Sayan Chakraborti, Alicia M. Soderberg, Laura Chomiuk, Atish Kamble, Naveen Yadav, et al.. A Missing-link in the Supernova-GRB Connection: The Case of SN 2012ap. The Astrophysical Journal, 2015, 805, ⟨10.1088/0004-637X/805/2/187⟩. ⟨hal-03786605⟩

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