Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
general
A mildly relativistic radio jet from the otherwise normal type Ic supernova 2007gr
Nature, Volume 463, No. 7280, Year 2010
Notification
URL copied to clipboard!
Description
The class of type Ic supernovae have drawn increasing attention since 1998 owing to their sparse association (only four so far) with long duration γ-ray bursts (GRBs). Although both phenomena originate from the core collapse of a massive star, supernovae emit mostly at optical wavelengths, whereas GRBs emit mostly in soft γ-rays or hard X-rays. Though the GRB central engine generates ultra-relativistic jets, which beam the early emission into a narrow cone, no relativistic outflows have hitherto been found in type Ib/c supernovae explosions, despite theoretical expectations and searches. Here we report radio (interferometric) observations that reveal a mildly relativistic expansion in a nearby type Ic supernova, SN 2007gr. Using two observational epochs 60 days apart, we detect expansion of the source and establish a conservative lower limit for the average apparent expansion velocity of 0.6c. Independently, a second mildly relativistic supernova has been reported. Contrary to the radio data, optical observations of SN 2007gr indicate a typical type Ic supernova with ejecta velocities 6,000 km s-1, much lower than in GRB-associated supernovae. We conclude that in SN 2007gr a small fraction of the ejecta produced a low-energy mildly relativistic bipolar radio jet, while the bulk of the ejecta were slower and, as shown by optical spectropolarimetry, mildly aspherical. © 2010 Macmillan Publishers Limited. All rights reserved.
Authors & Co-Authors
Paragi, Zsolt
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
Hungary, Budapest
Mta-bme Research Group for Physical Geodesy and Geodynamics
Taylor, Gregory B.
United States, Albuquerque
The University of new Mexico
Kouveliotou, Chryssa K.
United States, Huntsville
Nasa Marshall Space Flight Center
Granot, Jonathan
United Kingdom, Hatfield
University of Hertfordshire
Ramírez-Ruiz, Enrico
United States, Santa Cruz
University of California, Santa Cruz
Bietenholz, Michael F.
South Africa, Krugersdorp
Hartebeesthoek Radio Astronomy Observatory
Canada, Toronto
York University
van der Horst, Alexander J.
United States, Huntsville
Nasa Marshall Space Flight Center
Pidopryhora, Y.
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
van Langevelde, Huib Jan
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
Netherlands, Leiden
Sterrewacht Leiden
Garrett, Michael A.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Leiden
Sterrewacht Leiden
Australia, Hawthorn
Swinburne University of Technology
Szomoru, Arpad
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
Argo, Megan
Australia, Perth
Curtin University
Bourke, S.
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
Paczyski, B.
Unknown Affiliation
Statistics
Citations: 50
Authors: 14
Affiliations: 12
Identifiers
Doi:
10.1038/nature08713
ISSN:
00280836
e-ISSN:
14764687
Research Areas
Environmental
Mental Health