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Title: EXPLORING THE X-RAY AND γ-RAY PROPERTIES OF THE REDBACK MILLISECOND PULSAR PSR J1723–2837

We have investigated the X-ray and γ-ray properties of the redback millisecond pulsar PSR J1723–2837 with XMM-Newton, Chandra, and Fermi. We have discovered the X-ray orbital modulation of this binary system with a minimum that coincides with the phases of radio eclipse. The X-ray emission is clearly non-thermal in nature, which can be described well by a simple power law with a photon index of ∼1.2. The phase-averaged luminosity is ∼9 × 10{sup 31} erg s{sup –1} in 0.3-10 keV, which consumes ∼0.2% of the spin-down power. We have detected the γ-ray emission in 0.1-300 GeV from this system at a significance of ∼6σ for the first time. The γ-rays in this energy range consume ∼2% of the spin-down power and can be modeled by a power law with a photon index of ∼2.6. We discuss the high energy properties of the new redback in the context of an intrabinary shock model.
Authors:
 [1] ; ; ;  [2] ; ; ;  [3] ;  [4]
  1. Department of Astronomy and Space Science, Chungnam National University, Daejeon 305-764 (Korea, Republic of)
  2. Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu, Taiwan (China)
  3. Department of Physics, University of Hong Kong, Pokfulam Road (Hong Kong)
  4. General Education Center, China Medical University, Taichung 40402, Taiwan (China)
Publication Date:
OSTI Identifier:
22364032
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 781; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COSMIC PHOTONS; ECLIPSE; GAMMA RADIATION; GEV RANGE; INDEXES; KEV RANGE; LUMINOSITY; MODULATION; PHOTON EMISSION; PULSARS; SPIN; STARS; X RADIATION