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Title: Parkes radio searches of Fermi gamma-ray sources and millisecond pulsar discoveries

In a search with the Parkes radio telescope of 56 unidentified Fermi-Large Area Telescope (LAT) gamma-ray sources, we have detected 11 millisecond pulsars (MSPs), 10 of them discoveries, of which five were reported by Kerr et al. We did not detect radio pulsations from six other pulsars now known in these sources. We also describe the completed survey, which included multiple observations of many targets conducted to minimize the impact of interstellar scintillation, acceleration effects in binary systems, and eclipses. We consider that 23 of the 39 remaining sources may still be viable pulsar candidates. Furthermore, we present timing solutions and polarimetry for five of the MSPs and gamma-ray pulsations for PSR J1903–7051 (pulsations for five others were reported in the second Fermi-LAT catalog of gamma-ray pulsars). Two of the new MSPs are isolated and five are in $$\gt 1$$ day circular orbits with 0.2–0.3 $${M}_{\odot }$$ presumed white dwarf companions. PSR J0955–6150, in a 24 day orbit with a $$\approx 0.25$$ $${M}_{\odot }$$ companion but eccentricity of 0.11, belongs to a recently identified class of eccentric MSPs. PSR J1036–8317 is in an 8 hr binary with a $$\gt 0.14$$ $${M}_{\odot }$$ companion that is probably a white dwarf. PSR J1946–5403 is in a 3 hr orbit with a $$\gt 0.02$$ $${M}_{\odot }$$ companion with no evidence of radio eclipses.
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [3] ; ORCiD logo [4] ;  [5] ;  [6] ;  [2] ;  [2] ;  [3] ;  [7] ;  [8] ;  [9] ;  [8] ;  [10] ;  [11] ;  [3]
  1. Columbia Univ., New York, NY (United States). Columbia Astrophysics Lab.
  2. Australia Telescope National Facility, Epping (Australia). CSRO Astronomy and Space Science
  3. Naval Research Lab. (NRL), Washington, DC (United States). Space Science Division
  4. National Radio Astronomy Observatory, Charlottesville, VA (United States)
  5. CSIRO Parks Observatory, Parkes (Australia)
  6. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Astronomy
  7. Max Planck Inst. for Radio Astronomy, Bonn (Germany)
  8. Univ. of Manchester (United Kingdom). Jodrell Bank Centre for Astrophysics
  9. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  10. Stanford Univ., CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology; SLAC National Accelerator Lab., Menlo Park, CA (United States)
  11. Univ. of California, Santa Cruz, CA (United States). Ssanta Cruz Inst. for Particle Physics; City Univ. of Hong Kong (China). Dept. of Physics
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 810; Journal Issue: 2; Journal ID: ISSN 1538-4357
Institute of Physics (IOP)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
Contributing Orgs:
Fermi LAT Collaboration
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS; gamma-rays: stars; pulsars: individual (PSR J0955–6150, PSR J1012–4235, PSR J1036–8317, PSR J1903–7051, PSR J1946–5403)
OSTI Identifier: