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Title: Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope

Abstract

Here, 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 Nançay 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.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [8];  [10];  [11];  [12];  [4];  [6];  [2];  [7];  [13];  [13];  [14] more »;  [15];  [16];  [17];  [18];  [7];  [16];  [19];  [15];  [1];  [6];  [15];  [7] « less
  1. Observatoire de Paris, Nancay (France)
  2. Max-Planck-Institut fur Radioastronomie, Bonn (Germany)
  3. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
  4. Univ. Bordeaux, Gradignan (France)
  5. North-West Univ., Potchefstroom (South Africa)
  6. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  7. Naval Research Lab., Washington, D.C. (United States)
  8. National Academy of Sciences, Washington, D.C. (United States); Naval Research Lab., Washington, D.C. (United States)
  9. Univ. of Maryland, College Park, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  10. Univ. Paris Diderot, Gif sur Yvette (France)
  11. Columbia Univ., New York, NY (United States)
  12. Univ. of California, Berkeley, CA (United States)
  13. Australia Telescope National Facility, Epping, NSW (Australia)
  14. Max-Planck-Institut fur Radioastronomie, Bonn (Germany); The Univ. of Manchester (United Kingdom)
  15. The Univ. of Manchester (United Kingdom)
  16. Stanford Univ., Stanford, CA (United States)
  17. George Mason Univ., Fairfax, VA (United States); Naval Research Lab., Washington, D.C. (United States)
  18. National Radio Astronomy Observatory (NRAO), Charlottesville, VA (United States)
  19. Univ. of California, Santa Cruz, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1357258
Grant/Contract Number:
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 732; Journal Issue: 1; Journal ID: ISSN 0004-637X
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; gamma rays: general; pulsars: general; pulsars: individual (J2017+0603 J2302+4442)

Citation Formats

Cognard, I., Guillemot, L., Johnson, Tyrel 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., and Wood, K. S.. Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope. United States: N. p., 2011. Web. doi:10.1088/0004-637X/732/1/47.
Cognard, I., Guillemot, L., Johnson, Tyrel 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.. Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope. United States. doi:10.1088/0004-637X/732/1/47.
Cognard, I., Guillemot, L., Johnson, Tyrel 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., and Wood, K. S.. Thu . "Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope". United States. doi:10.1088/0004-637X/732/1/47. https://www.osti.gov/servlets/purl/1357258.
@article{osti_1357258,
title = {Discovery of two millisecond pulsars in Fermi sources with the Nancay Radio Telescope},
author = {Cognard, I. and Guillemot, L. and Johnson, Tyrel J. and Smith, D. A. and Venter, C. and Harding, A. K. and Wolff, M. T. and Cheung, C. C. and Donato, D. and Abdo, A. A. and Ballet, J. and Camilo, F. and Desvignes, G. and Dumora, D. and Ferrara, E. C. and Freire, P. C. C. and Grove, J. E. and Johnston, S. and Keith, M. and Kramer, M. and Lyne, A. G. and Michelson, P. F. and Parent, D. and Ransom, S. M. and Ray, P. S. and Romani, R. W. and Parkinson, P. M. Saz and Stappers, B. W. and Theureau, G. and Thompson, D. J. and Weltevrede, P. and Wood, K. S.},
abstractNote = {Here, 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 Nançay 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.},
doi = {10.1088/0004-637X/732/1/47},
journal = {Astrophysical Journal},
number = 1,
volume = 732,
place = {United States},
year = {Thu Apr 14 00:00:00 EDT 2011},
month = {Thu Apr 14 00:00:00 EDT 2011}
}

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