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A mildly relativist...
A mildly relativistic wide-angle outflow in the neutron-star merger event GW170817
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- Mooley, K. (författare)
- National Radio Astronomy Observatory Socorro,California Institute of Technology (Caltech)
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- Nakar, E. (författare)
- Tel Aviv University
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- Hotokezaka, K. (författare)
- Princeton University
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visa fler...
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- Hallinan, G. (författare)
- California Institute of Technology (Caltech)
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- Corsi, A. (författare)
- Texas Tech University,Texas Tech University at Lubbock
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- Frail, D. A. (författare)
- National Radio Astronomy Observatory Socorro,The University of Sydney,Commonwealth Scientific and Industrial Research Organisation (CSIRO),ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav),Swinburne University of Technology
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- Horesh, A. (författare)
- The Hebrew University Of Jerusalem
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- Murphy, T. (författare)
- ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),The University of Sydney
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- Lenc, E. (författare)
- The University of Sydney,ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
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- Kaplan, D. L. (författare)
- University of Wisconsin Milwaukee,California Institute of Technology (Caltech)
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- De, K. (författare)
- California Institute of Technology (Caltech)
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- Dobie, D. (författare)
- The University of Sydney,Commonwealth Scientific and Industrial Research Organisation (CSIRO),ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
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- Chandra, Poonam (författare)
- Stockholms universitet,Institutionen för astronomi,Tata Institute of Fundamental Research, India,National Centre for Radio Astrophysics India,Stockholm University
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- Deller, A. (författare)
- ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav),Swinburne University of Technology
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- Gottlieb, O. (författare)
- Tel Aviv University
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- Kasliwal, M. (författare)
- California Institute of Technology (Caltech)
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- Kulkarni, S. R. (författare)
- California Institute of Technology (Caltech)
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- Myers, S. T. (författare)
- National Radio Astronomy Observatory Socorro
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- Nissanke, S. (författare)
- Radboud Universiteit,Radboud University
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- Piran, T. (författare)
- The Hebrew University Of Jerusalem
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- Lynch, C. (författare)
- ARC Centre of Excellence for All-sky Astrophysics (CAASTRO),The University of Sydney
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- Bhalerao, V. (författare)
- Indian Institute of Technology
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- Bourke, Stephen, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bannister, K. W. (författare)
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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- Singer, L. P. (författare)
- NASA Goddard Space Flight Center
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visa färre...
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(creator_code:org_t)
- 2017-12-20
- 2018
- Engelska.
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 554:7691, s. 207-210
- Relaterad länk:
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https://authors.libr...
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https://research.cha...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- GW170817 was the first gravitational-wave detection of a binary neutron-star merger. It was accompanied by radiation across the electromagnetic spectrum and localized to the galaxy NGC 4993 at a distance of 40 megaparsecs. It has been proposed that the observed γ-ray, X-ray and radio emission is due to an ultra-relativistic jet being launched during the merger (and successfully breaking out of the surrounding material), directed away from our line of sight (off-axis). The presence of such a jet is predicted from models that posit neutron-star mergers as the drivers of short hard-γ-ray bursts. Here we report that the radio light curve of GW170817 has no direct signature of the afterglow of an off-axis jet. Although we cannot completely rule out the existence of a jet directed away from the line of sight, the observed γ-ray emission could not have originated from such a jet. Instead, the radio data require the existence of a mildly relativistic wide-angle outflow moving towards us. This outflow could be the high-velocity tail of the neutron-rich material that was ejected dynamically during the merger, or a cocoon of material that breaks out when a jet launched during the merger transfers its energy to the dynamical ejecta. Because the cocoon model explains the radio light curve of GW170817, as well as the γ-ray and X-ray emission (and possibly also the ultraviolet and optical emission), it is the model that is most consistent with the observational data. Cocoons may be a ubiquitous phenomenon produced in neutron-star mergers, giving rise to a hitherto unidentified population of radio, ultraviolet, X-ray and γ-ray transients in the local Universe.
Ämnesord
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Till lärosätets databas
- Av författaren/redakt...
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Mooley, K.
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Nakar, E.
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Hotokezaka, K.
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Hallinan, G.
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Corsi, A.
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Frail, D. A.
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visa fler...
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Horesh, A.
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Murphy, T.
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Lenc, E.
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Kaplan, D. L.
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De, K.
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Dobie, D.
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Chandra, Poonam
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Deller, A.
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Gottlieb, O.
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Kasliwal, M.
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Kulkarni, S. R.
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Myers, S. T.
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Nissanke, S.
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Piran, T.
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Lynch, C.
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Bhalerao, V.
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Bourke, Stephen, ...
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Bannister, K. W.
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Singer, L. P.
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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NATURVETENSKAP
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och Fysik
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och Subatomär fysik
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NATURVETENSKAP
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Chalmers tekniska högskola
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Stockholms universitet