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Periodic emission from the gamma-ray binary 1FGL J1018.6-5856

  • M. Ackermann
  • , M. Ajello
  • , J. Ballet
  • , G. Barbiellini
  • , D. Bastieri
  • , A. Belfiore
  • , R. Bellazzini
  • , B. Berenji
  • , R. D. Blandford
  • , E. D. Bloom
  • , E. Bonamente
  • , A. W. Borgland
  • , J. Bregeon
  • , M. Brigida
  • , P. Bruel
  • , R. Buehler
  • , S. Buson
  • , G. A. Caliandro
  • , R. A. Cameron
  • , P. A. Caraveo
  • E. Cavazzuti, C. Cecchi, Ö Çelik, E. Charles, S. Chaty, A. Chekhtman, C. C. Cheung, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, S. Corbel, R. H.D. Corbet, S. Cutini, A. De Luca, P. R. Den Hartog, F. De Palma, C. D. Dermer, S. W. Digel, E. Do Couto E Silva, D. Donato, P. S. Drell, A. Drlica-Wagner, R. Dubois, G. Dubus, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, P. Fortin, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier, J. E. Grove, S. Guiriec, D. Hadasch, Y. Hanabata, A. K. Harding, M. Hayashida, E. Hays, A. B. Hill, R. E. Hughes, G. Jóhannesson, A. S. Johnson, T. J. Johnson, T. Kamae, H. Katagiri, J. Kataoka, M. Kerr, J. Knödlseder, M. Kuss, J. Lande, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, M. N. Mazziotta, J. E. McEnery, P. F. Michelson, W. Mitthumsiri, T. Mizuno, C. Monte, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, T. Nakamori, M. Naumann-Godo, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, M. Ozaki, D. Paneque, D. Parent, M. Pesce-Rollins, M. Pierbattista, F. Piron, G. Pivato, T. A. Porter, S. Rainò, R. Rando, M. Razzano, A. Reimer, O. Reimer, S. Ritz, R. W. Romani, M. Roth, P. M. Saz Parkinson, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, D. J. Suson, H. Takahashi, T. Tanaka, J. G. Thayer, J. B. Thayer, D. J. Thompson, L. Tibaldo, M. Tinivella, D. F. Torres, G. Tosti, E. Troja, Y. Uchiyama, T. L. Usher, J. Vandenbroucke, G. Vianello, V. Vitale, A. P. Waite, B. L. Winer, K. S. Wood, M. Wood, Z. Yang, S. Zimmer, M. J. Coe, F. Di Mille, P. G. Edwards, M. D. Filipović, J. L. Payne, J. Stevens, M. A.P. Torres
  • Stanford University
  • Universite Paris-Saclay
  • INFN Sezione di Trieste
  • University of Trieste
  • INFN
  • University of Padova
  • University of California at Santa Cruz
  • University of Pavia
  • INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • INFN Sezione di Perugia
  • University of Perugia
  • Politecnico di Bari
  • INFN Sezione di Bari
  • University of Sheffield
  • Science and Research Directorate
  • NASA Goddard Space Flight Center
  • Biochemical and Environmental Engineering
  • Artep Inc.
  • Naval Research Laboratory
  • National Research Council
  • ASI Science Data Center
  • Laboratoire Univers et Particules de Montpellier
  • Institut Universitaire de France
  • Scuola Universitaria Superiore IUSS di Pavia
  • University of Maryland
  • Université Grenoble Alpes
  • Ip Paris
  • Hiroshima University
  • INAF Istituto di Radioastronomia
  • Center for Space Plasma and Aeronomic Research
  • Department of Astronomy, Graduate School of Science, Kyoto University
  • University of Southampton
  • The Ohio State University
  • University of Iceland
  • Ibaraki University
  • Waseda University
  • IRAP/CNRS
  • Université Paul Sabatier
  • INFN Roma Tor Vergata
  • Boise State University
  • ISAS/JAXA
  • Max Planck Institut für Extraterrestrische Physik
  • Max-Planck-Institut für Physik
  • George Mason University
  • Medical University of Innsbruck
  • University of Washington
  • NYCB Real-Time Computing Inc.
  • Purdue University Northwest
  • Pompeu Fabra University (UPF)
  • Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
  • University of Rome “Tor Vergata”
  • Stockholm University
  • Oskar Klein Centre
  • Australian Astronomical Observatory-Las Campanas Observatory, Colina
  • Commonwealth Scientific and Industrial Research Organization
  • Western Sydney University
  • Center for Astrophysics | Harvard & Smithsonian

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

Gamma-ray binaries are stellar systems containing a neutron star or black hole, with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution models predict dozens in our Galaxy. A search for gamma-ray binaries with the Fermi Large Area Telescope (LAT) shows that 1FGL J1018.6-5856 exhibits intensity and spectral modulation with a 16.6-day period. We identified a variable x-ray counterpart, which shows a sharp maximum coinciding with maximum gamma-ray emission, as well as an O6V((f)) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. 1FGL J1018.6-5856 is thus a gamma-ray binary, and its detection suggests the presence of other fainter binaries in the Galaxy.

Original languageEnglish
Pages (from-to)189-193
Number of pages5
JournalScience
Volume335
Issue number6065
DOIs
Publication statusPublished - 13 Jan 2012

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