2016ApJ...827...83K

Query : 2016ApJ...827...83K

2016ApJ...827...83K - Astrophys. J., 827, 83-83 (2016/August-2)

The unreasonable weakness of r-process cosmic rays in the neutron-star-merger nucleosynthesis scenario.

KYUTOKU K. and IOKA K.

Abstract (from CDS):

We reach the robust conclusion that, by combining the observed cosmic rays of r-process elements with the fact that the velocity of the neutron-star-merger ejecta is much higher than that of the supernova ejecta, either (1) the reverse shock in the neutron-star-merger ejecta is a very inefficient accelerator that converts less than 0.003% of the ejecta kinetic energy to the cosmic-ray energy or (2) the neutron star merger is not the origin of the Galactic r-process elements. We also find that the acceleration efficiency should be less than 0.1% for the reverse shock of the supernova ejecta with observed cosmic rays lighter than the iron.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): acceleration of particles - cosmic rays - ISM: supernova remnants - nuclear reactions, nucleosynthesis, abundances - shock waves - stars: neutron - stars: neutron

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J112848.22+170418.5 G 11 28 48.22989 +17 04 18.5014           ~ 393 0
2 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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