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Title: Psr J2030+3641: Radio Discovery And Gamma-Ray Study Of A Middle-Aged Pulsar In The Now Identified Fermi -Lat Source 1FGL J2030.0+3641

Journal Article · · The Astrophysical Journal
 [1];  [2];  [3];  [4];  [5];  [2];  [6];  [7];  [8];  [9];  [10];  [8];  [11];  [11];  [5];  [12];  [3]
  1. Columbia Univ., New York, NY (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Naval Research Lab. (NRL), Washington, DC (United States)
  4. National Radio Astronomy Observatory (NRAO), Charlottesville, VA (United States)
  5. Australia Telescope National Facility, Epping NSW (Australia)
  6. George Mason Univ., Fairfax, VA (United States); Naval Research Lab. (NRL), Washington, DC (United States)
  7. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
  8. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  9. Australia Telescope National Facility, Epping NSW (Australia); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  10. Univ. of California, Santa Cruz, CA (United States)
  11. Max Planck Inst. for Radioastronomy, Bonn (Germany)
  12. Max Planck Inst. for Radioastronomy, Bonn (Germany); Univ. of Manchester (United Kingdom)
+ Show Author Affiliations

In a radio search with the Green Bank Telescope of three unidentified low Galactic latitude Fermi-LAT sources, we have discovered the middle-aged pulsar J2030+3641, associated with 1FGL J2030.0+3641 (2FGL J2030.0+3640). Following the detection of gamma-ray pulsations using a radio ephemeris, we have obtained a phase-coherent timing solution based on gamma-ray and radio pulse arrival times that spans the entire Fermi mission. With a rotation period of 0.2 s, spin-down luminosity of 3X1034 erg s-1, and characteristic age of 0.5 Myr, PSR J2030+3641 is a middle-aged neutron star with spin parameters similar to those of the exceedingly gamma-ray-bright and radio-undetected Geminga. Its gamma-ray flux is 1% that of Geminga, primarily because of its much larger distance, as suggested by the large integrated column density of free electrons, DM = 246 pc cm-3. We fit the gamma-ray light curve, along with limited radio polarimetric constraints, to four geometrical models of magnetospheric emission, and while none of the fits have high significance some are encouraging and suggest that further refinements of these models may be worthwhile. We argue that not many more non-millisecond radio pulsars may be detected along the Galactic plane that are responsible for LAT sources, but that modified methods to search for gamma-ray pulsations should be productive — PSR J2030+3641 would have been found blindly in gamma rays if only & 0:8 GeV photons had been considered, owing to its relatively flat spectrum and location in a region of high soft background.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1356762
Journal Information:
The Astrophysical Journal, Vol. 746, Issue 1; ISSN 0004-637X
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (5)

THE SECOND FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS journal September 2013
KNOWN PULSARS IDENTIFIED IN THE GMRT 150 MHz ALL-SKY SURVEY journal September 2016
The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up journal February 2018
The Second Fermi Large area Telescope Catalog of Gamma-Ray Pulsars text January 2013
The Einstein@Home Gamma-Ray Pulsar Survey II. Source Selection, Spectral Analysis and Multi-wavelength Follow-up text January 2017

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