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Fermi Detection of a Luminous gamma-Ray Pulsar in a Globular Cluster

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Authors
Freire, P.
Abdo, A.
Ajello, M.
Allafort, A.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Blandford, R.
Bloom, E.
Bonamente, E.
Borgland, A.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G.
Cameron, R.
Camilo, F.
Caraveo, P.
Cecchi, C.
Celik, O.
Charles, E.
Chekhtman, A.
Cheung, C.
Chiang, J.
Ciprini, S.
Claus, R.
Cognard, I.
Cohen-Tanugi, J.
Cominsky, L.
de Palma, F.
Dermer, C.
do Couto e Silva, E.
Dormody, M.
Drell, P.
Dubois, R.
Dumora, D.
Espinoza, C.
Favuzzi, C.
Fegan, S.
Ferrara, E.
Focke, W.
Fortin, P.
Fukazawa, Y.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I.
Grondin, M.
Grove, J.
Guillemot, L.
Guiriec, S.
Hadasch, D.
Harding, A.
Johannesson, G.
Johnson, A.
Johnson, T.
Johnston, S.
Katagiri, H.
Kataoka, J.
Keith, M.
Kerr, M.
Knoedlseder, J.
Kramer, M.
Kuss, M.
Lande, J.
Latronico, L.
Lee, S.
Lemoine-Goumard, M.
Longo, F.
Loparco, F.
Lovellette, M.
Lubrano, P.
Lyne, A.
Manchester, R.
Marelli, M.
Mazziotta, M.
McEnery, J.
Michelson, P.
Mizuno, T.
Moiseev, A.
Monte, C.
Monzani, M.
Morselli, A.
Moskalenko, I.
Murgia, S.
Nakamori, T.
Nolan, P.
Norris, J.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ozaki, M.
Paneque, D.
Parent, D.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Porter, T.
Raino, S.
Ransom, S.
Ray, P.
Reimer, A.
Reimer, O.
Reposeur, T.
Ritz, S.
Romani, R.
Roth, M.
Sadrozinski, H.
Parkinson, P.
Sgro, C.
Shannon, Ryan
Siskind, E.
Smith, D.
Smith, P.
Spinelli, P.
Stappers, B.
Suson, D.
Takahashi, H.
Tanaka, T.
Tauris, T.
Thayer, J.
Theureau, G.
Thompson, D.
Thorsett, S.
Tibaldo, L.
Torres, D.
Tosti, G.
Troja, E.
Vandenbroucke, J.
Van Etten, A.
Vasileiou, V.
Venter, C.
Vianello, G.
Vilchez, N.
Vitale, V.
Waite, A.
Wang, P.
Wood, K.
Yang, Z.
Ziegler, M.
Zimmer, S.
Date
2011
Type
Journal Article

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Citation
Freire, P. and Abdo, A. and Ajello, M. and Allafort, A. and Ballet, J. and Barbiellini, G. and Bastieri, D. et al. 2011. Fermi Detection of a Luminous gamma-Ray Pulsar in a Globular Cluster. Science. 334 (6059): pp. 1107-1110.
Source Title
Science
DOI
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School
Curtin Institute of Radio Astronomy (Physics)
URI
Collection
Abstract

We report on the Fermi Large Area Telescope's detection of γ-ray (>100 mega-electron volts) pulsations from pulsar J1823-3021A in the globular cluster NGC 6624 with high significance (∼7 σ). Its γ-ray luminosity, Lγ = (8.4 ± 1.6) × 1034 ergs per second, is the highest observed for any millisecond pulsar (MSP) to date, and it accounts for most of the cluster emission. The nondetection of the cluster in the off-pulse phase implies that it contains <32 γ-ray MSPs, not ∼100 as previously estimated. The γ-ray luminosity indicates that the unusually large rate of change of its period is caused by its intrinsic spin-down. This implies that J1823-3021A has the largest magnetic field and is the youngest MSP ever detected and that such anomalous objects might be forming at rates comparable to those of the more normal MSPs.