DISCOVERY OF TWO MILLISECOND PULSARS IN FERMI SOURCES WITH THE NANCAY RADIO TELESCOPE

Cognard, I; Guillemot, L; Freire, P C. C.; Kramer, M; Johnson, T J; Harding, A K; Ferrara, E C; Smith, D A; Dumora, D; Venter, C; Wolff, M T; Grove, J E; Cheung, C C; Abdo, A A; Donato, D; Ballet, J; Camilo, F; Desvignes, G; Johnston, S; Keith, M

doi:10.1088/0004-637X/732/1/47

DISCOVERY OF TWO MILLISECOND PULSARS IN FERMI SOURCES WITH THE NANCAY RADIO TELESCOPE

Journal Article · Sun May 01 04:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/732/1/47· OSTI ID:21574621

Cognard, I ^[1]; Guillemot, L; Freire, P C. C.; Kramer, M ^[2]; Johnson, T J; Harding, A K; Ferrara, E C ^[3]; Smith, D A; Dumora, D ^[4]; Venter, C ^[5]; Wolff, M T; Grove, J E ^[6]; Cheung, C C; Abdo, A A ^[7]; Donato, D ^[8]; Ballet, J ^[9]; Camilo, F ^[10]; Desvignes, G ^[11]; Johnston, S; Keith, M ^[12]

Laboratoire de Physique et Chimie de l'Environnement et de l'Espace LPC2E CNRS-Universite d'Orleans, F-45071 Orleans Cedex 02, and Station de radioastronomie de Nancay, Observatoire de Paris, CNRS/INSU, F-18330 Nancy (France)
Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, 53121 Bonn (Germany)
NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
Universite Bordeaux 1, CNRS/IN2p3, Centre d'Etudes Nucleaires de Bordeaux Gradignan, 33175 Gradignan (France)
North-West University, Potchefstroom Campus, Potchefstroom 2520 (South Africa)
Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)
National Research Council, National Academy of Sciences, Washington, DC 20001 (United States)
Department of Physics and Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)
Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)
Department of Astronomy, University of California, Berkeley, Berkeley, CA 94720-3411 (United States)
Australia Telescope National Facility, CSIRO, Epping, NSW 1710 (Australia)

We report the discovery of two millisecond pulsars in a search for radio pulsations at the positions of Fermi-Large Area Telescope sources with no previously known counterparts, using the Nancay Radio Telescope. The two millisecond pulsars, PSRs J2017+0603 and J2302+4442, have rotational periods of 2.896 and 5.192 ms and are both in binary systems with low-eccentricity orbits and orbital periods of 2.2 and 125.9 days, respectively, suggesting long recycling processes. Gamma-ray pulsations were subsequently detected for both objects, indicating that they power the associated Fermi sources in which they were found. The gamma-ray light curves and spectral properties are similar to those of previously detected gamma-ray millisecond pulsars. Detailed modeling of the observed radio and gamma-ray light curves shows that the gamma-ray emission seems to originate at high altitudes in their magnetospheres. Additionally, X-ray observations revealed the presence of an X-ray source at the position of PSR J2302+4442, consistent with thermal emission from a neutron star. These discoveries along with the numerous detections of radio-loud millisecond pulsars in gamma rays suggest that many Fermi sources with no known counterpart could be unknown millisecond pulsars.

OSTI ID:: 21574621

Journal Information:: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 732; ISSN ASJOAB; ISSN 0004-637X

Country of Publication:: United States

Language:: English

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