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

作者：Cognard I^*; Guillemot L; Johnson T J; Smith D A; Venter C; Harding A K; Wolff M T; Cheung C C; Donato D; Abdo A A; Ballet J; Camilo F; Desvignes G; Dumora D; Ferrara E C; Freire P C C; Grove J E; Johnston S; Keith M; Kramer M; Lyne A G; Michelson P F; Parent D; Ransom S M; Ray P S; Romani R W; Parkinson P M Saz; Stappers B W; Theureau G; Thompson D J; Weltevrede P; Wood K S

来源：Astrophysical Journal, 2011, 732(1): 47.

DOI：10.1088/0004-637X/732/1/47

• gamma rays: general
• pulsars: general
• pulsars: individual (J2017+0603, J2302+4442)

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.

• 出版日期2011-5-1
• 单位中国地震局; 西北大学; CSIRO