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Title: In what sense a neutron star-black hole binary is the holy grail for testing gravity?

Pulsars in binary systems have been very successful to test the validity of general relativity in the strong field regime [1-4]. So far, such binaries include neutron star-white dwarf (NS-WD) and neutron star-neutron star (NS-NS) systems. It is commonly believed that a neutron star-black hole (NS-BH) binary will be much superior for this purpose. But in what sense is this true? Does it apply to all possible deviations?.
Authors:
 [1] ;  [2]
  1. International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560012 (India)
  2. ICREA and Institute of Space Sciences, Barcelona 2a Planta E-08193 (Spain)
Publication Date:
OSTI Identifier:
22373378
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; GENERAL RELATIVITY THEORY; GRAVITATION; NEUTRON STARS; PULSARS; TESTING; WHITE DWARF STARS