Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger - INSPIRE

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Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger

M.M. Kasliwal
(
- Caltech
)
,
E. Nakar
(
- Tel Aviv U.
)
,
L.P. Singer
(
- NASA, Goddard and
- Maryland U.
)
,
D.L. Kaplan
(
- Wisconsin U., Milwaukee
)
,
D.O. Cook
(
- Caltech
)

Oct 16, 2017

83 pages

Published in:

Science 358 (2017) 1559

e-Print:

1710.05436 [astro-ph.HE]

DOI:

10.1126/science.aap9455

View in:

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Abstract: (arXiv)

Merging neutron stars offer an exquisite laboratory for simultaneously studying strong-field gravity and matter in extreme environments. We establish the physical association of an electromagnetic counterpart EM170817 to gravitational waves (GW170817) detected from merging neutron stars. By synthesizing a panchromatic dataset, we demonstrate that merging neutron stars are a long-sought production site forging heavy elements by r-process nucleosynthesis. The weak gamma-rays seen in EM170817 are dissimilar to classical short gamma-ray bursts with ultra-relativistic jets. Instead, we suggest that breakout of a wide-angle, mildly-relativistic cocoon engulfing the jet elegantly explains the low-luminosity gamma-rays, the high-luminosity ultraviolet-optical-infrared and the delayed radio/X-ray emission. We posit that all merging neutron stars may lead to a wide-angle cocoon breakout; sometimes accompanied by a successful jet and sometimes a choked jet.

Note:

Science, in press DOI 10.1126/science.aap9455, 83 pages, 3 tables, 16 figures

gamma ray: burst
gravitation: strong field
X-ray: emission
jet: relativistic
neutron star
gravitational radiation: emission
gravitational radiation: direct detection
gravitational radiation
wide-angle
electromagnetic

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