THE STRUCTURE AND EMISSION MODEL OF THE RELATIVISTIC JET IN THE QUASAR 3C 279 INFERRED FROM RADIO TO HIGH-ENERGY γ-RAY OBSERVATIONS IN 2008-2010
M. HayashidaDepartment of Astronomy, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, JapanG. MadejskiKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAKrzysztof NalewajkoNicolaus Copernicus Astronomical Center, 00-716 Warsaw, PolandM. SikoraNicolaus Copernicus Astronomical Center, 00-716 Warsaw, PolandA. E. WehrleSpace Science Institute, Boulder, CO 80301, USAP. OgleInfrared Processing and Analysis Center, California Institute of Technology Pasadena, CA 91125, USAW. CollmarMax-Planck Institut für Extraterrestrische Physik, 85748 Garching, GermanyS. LarssonDepartment of Astronomy, Stockholm University, SE-106 91 Stockholm, SwedenY. FukazawaDepartment of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanR. ItohDepartment of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanJ. ChiangKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAŁ. StawarzInstitute of Space and Astronautical Science, JAXA, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, JapanR. D. BlandfordKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAJ. L. RichardsCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USAW. Max-MoerbeckCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USAA. C. S. ReadheadCahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USAR. BuehlerKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAE. CavazzutiAgenzia Spaziale Italiana (ASI) Science Data Center, I-00044 Frascati (Roma), ItalyS. CipriniAgenzia Spaziale Italiana (ASI) Science Data Center, I-00044 Frascati (Roma), ItalyN. GehrelsNASA Goddard Space Flight Center, Greenbelt, MD 20771, USAA. ReimerInstitut für Astro- und Teilchenphysik and Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, AustriaA. SzostekAstronomical Observatory, Jagiellonian University, 30-244 Kraków, PolandTakaaki TanakaKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAG. TostiIstituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia, ItalyY. UchiyamaKavli Institute for Particle Astrophysics and Cosmology, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road M/S 29, Menlo Park, CA 94025, USAKoji S. KawabataHiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanMotoki KinoDepartment of Physics and Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602, JapanK. SakimotoDepartment of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanMahito SasadaDepartment of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanShuji SatoDepartment of Physics and Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602, JapanMakoto UemuraHiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanM. YamanakaDepartment of Physical Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, JapanJ. GreinerMax-Planck Institut für Extraterrestrische Physik, 85748 Garching, GermanyT. KruehlerDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, DenmarkA. RossiThuringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyJean‐Pierre MacquartInternational Centre for Radio Astronomy Research and Curtin University of Technology, Bentley, WA 6845, AustraliaDouglas C.‐J. BockCSIRO Astronomy and Space Science P.O. Box 76, Epping, NSW 1710, AustraliaM. VillataINAF, Osservatorio Astronomico di Torino, I-10025 Pino Torinese (TO), ItalyC. M. RaiteriINAF, Osservatorio Astronomico di Torino, I-10025 Pino Torinese (TO), ItalyI. AgudoInstituto de Astrofísica de Andalucía, CSIC, E-18080 Granada, SpainH. D. AllerDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090, USAM. F. AllerDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109-1090, USAA. A. ArkharovPulkovo Observatory, 196140 St. Petersburg, RussiaU. BachMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, GermanyE. BenítezInstituto de Astronomía, Universidad Nacional Autónoma de México, México, D. F., MexicoA. BerdyuginTuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-21500 Piikkiö, FinlandD. BlinovAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaKelly BlumenthalInstitute for Astrophysical Research, Boston University, Boston, MA 02215, USAM. BöttcherAstrophysical Institute Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USAC. S. BuemiINAF, Osservatorio Astrofisico di Catania, 95123 Catania, ItalyD. CarosatiEPT Observatories, Tijarafe, La Palma, SpainWen-Ping ChenGraduate Institute of Astronomy, National Central University, Jhongli 32001, TaiwanA. Di PaolaINAF, Osservatorio Astronomico di Roma, I-00040 Monte Porzio Catone (Roma), ItalyM. DolciINAF, Osservatorio Astronomico di Collurania "Vincenzo Cerruli," 64100 Teramo, ItalyН. В. ЕфимоваPulkovo Observatory, 196140 St. Petersburg, RussiaE. FornéAgrupació Astronòmica de Sabadell, 08206 Sabadell, SpainJosé L. GómezInstituto de Astrofísica de Andalucía, CSIC, E-18080 Granada, SpainMark GurwellHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USAJ. HeidtZAH, Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, GermanyD. HiriartInstituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., MexicoB. JordanSchool of Cosmic Physics, Dublin Institute for Advanced Studies, Dublin 2, IrelandS. G. JorstadInstitute for Astrophysical Research, Boston University, Boston, MA 02215, USAM. JoshiInstitute for Astrophysical Research, Boston University, Boston, MA 02215, USAG. N. KimeridzeAbastumani Observatory, Mount Kanobili, 0301 Abastumani, GeorgiaT. S. KonstantinovaAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaE. N. KopatskayaAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaE. KoptelovaDepartment of Physics, National Taiwan University, 106 Taipei, TaiwanO. M. KurtanidzeAbastumani Observatory, Mount Kanobili, 0301 Abastumani, GeorgiaA. LähteenmäkiAalto University Metsähovi Radio Observatory, FIN-02540 Kylmälä, FinlandA. LameratoAstrophysical Institute Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USAV. M. LarionovPulkovo Observatory, 196140 St. Petersburg, RussiaЕ. Г. ЛарионоваAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaL. V. LarionovaAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaP. LetoINAF, Osservatorio Astrofisico di Catania, 95123 Catania, ItalyE. LindforsTuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-21500 Piikkiö, FinlandAlan P. MarscherInstitute for Astrophysical Research, Boston University, Boston, MA 02215, USAI. McHardySchool of Physics and Astronomy, University of Southampton, Highfield, Southampton, SO17 1BJ, UKS. N. MolinaInstituto de Astrofísica de Andalucía, CSIC, E-18080 Granada, SpainD. A. MorozovaAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaM. G. NikolashviliAbastumani Observatory, Mount Kanobili, 0301 Abastumani, GeorgiaK. NilssonFinnish Centre for Astronomy with ESO (FINCA), University of Turku, FI-21500 Piikiiö, FinlandR. ReinthalTuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-21500 Piikkiö, FinlandP. RoustazadehAstrophysical Institute Department of Physics and Astronomy, Ohio University, Athens, OH 45701, USAT. SakamotoNASA Goddard Space Flight Center, Greenbelt, MD 20771, USAL. A. SiguaAbastumani Observatory, Mount Kanobili, 0301 Abastumani, GeorgiaA. SillanpääTuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-21500 Piikkiö, FinlandL. O. TakaloTuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-21500 Piikkiö, FinlandJ. TammiAalto University Metsähovi Radio Observatory, FIN-02540 Kylmälä, FinlandBrian TaylorLowell Observatory, Flagstaff, AZ 86001, USAM. TornikoskiAalto University Metsähovi Radio Observatory, FIN-02540 Kylmälä, FinlandC. TrigilioINAF, Osservatorio Astrofisico di Catania, 95123 Catania, ItalyI. S. TroitskyAstronomical Institute, St. Petersburg State University, St. Petersburg, RussiaG. UmanaINAF, Osservatorio Astrofisico di Catania, 95123 Catania, Italy
2012en
ABI
Аннотация
We present time-resolved broadband observations of the quasar 3C 279 obtained from multi-wavelength campaigns conducted during the first two years of the Fermi Gamma-ray Space Telescope mission. While investigating the previously reported γ-ray/optical flare accompanied by a change in optical polarization, we found that the optical emission appears to be delayed with respect to the γ-ray emission by about 10 days. X-ray observations reveal a pair of "isolated" flares separated by ~90 days, with only weak γ-ray/optical counterparts. The spectral structure measured by Spitzer reveals a synchrotron component peaking in the mid-infrared band with a sharp break at the far-infrared band during the γ-ray flare, while the peak appears in the millimeter (mm)/submillimeter (sub-mm) band in the low state. Selected spectral energy distributions are fitted with leptonic models including Comptonization of external radiation produced in a dusty torus or the broad-line region. Adopting the interpretation of the polarization swing involving propagation of the emitting region along a curved trajectory, we can explain the evolution of the broadband spectra during the γ-ray flaring event by a shift of its location from ~1 pc to ~4 pc from the central black hole. On the other hand, if the γ-ray flare is generated instead at sub-pc distance from the central black hole, the far-infrared break can be explained by synchrotron self-absorption. We also model the low spectral state, dominated by the mm/sub-mm peaking synchrotron component, and suggest that the corresponding inverse-Compton component explains the steady X-ray emission.
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