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dc.contributor.authorSallum, S.
dc.date.accessioned2015-02-26T21:25:08Z
dc.date.available2015-02-26T21:25:08Z
dc.date.issued2013-08
dc.date.submitted2013-03
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://hdl.handle.net/1721.1/95699
dc.description.abstractWe analyze the multi-frequency behavior of the quasar 3C 454.3 during three prominent γ-ray outbursts: 2009 Autumn, 2010 Spring, and 2010 Autumn. The data reveal a repeating pattern, including a triple flare structure, in the properties of each γ-ray outburst, which implies similar mechanism(s) and location for all three events. The multi-frequency behavior indicates that the lower frequency events are co-spatial with the γ-ray outbursts, although the γ-ray emission varies on the shortest timescales. We determine that the variability from UV to IR wavelengths during an outburst results from a single synchrotron component whose properties do not change significantly over the different outbursts. Despite a general increase in the degree of optical linear polarization during an outburst, the polarization drops significantly at the peak of the γ-ray event, which suggests that both shocks and turbulent processes are involved. We detect two disturbances (knots) with superluminal apparent speeds in the parsec-scale jet associated with the outbursts in 2009 Autumn and 2010 Autumn. The kinematic properties of the knots can explain the difference in amplitudes of the γ-ray events, while their millimeter-wave polarization is related to the optical polarization during the outbursts. We interpret the multi-frequency behavior within models involving either a system of standing conical shocks or magnetic reconnection events located in the parsec-scale millimeter-wave core of the jet. We argue that γ-ray outbursts with variability timescales as short as ~3 hr can occur on parsec scales if flares take place in localized regions such as turbulent cells.en_US
dc.description.sponsorshipAcademy of Finlanden_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant NNX08AW56G)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant NNX09AU93G)en_US
dc.description.sponsorshipRussian Foundation for Basic Research (RFBR grant 12-02-00452)en_US
dc.description.sponsorshipRussian Foundation for Basic Research (RFBR 12-02-31193)en_US
dc.description.sponsorshipAndalusia (Spain) (P09-FQM-4784)en_US
dc.description.sponsorshipSpain. Ministerio de Economía y Competitividad (grant AYA2010-14844)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA via Herschel RSA 1427799, Guest Investigator) )en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA, Fermi Guest Investigator grant grant NNX11AAO85G)en_US
dc.description.sponsorshipSmithsonian Institutionen_US
dc.description.sponsorshipAcademia Sinica (Beijing, China)en_US
dc.description.sponsorshipGeorgian National Science Foundation (grant GNSF/ST09/4-521)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA contract NAS5- 00136)en_US
dc.language.isoen_US
dc.publisherInstitute of Physics/American Astronomical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/773/2/147en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Astronomical Societyen_US
dc.titleA TIGHT CONNECTION BETWEEN GAMMA-RAY OUTBURSTS AND PARSEC-SCALE JET ACTIVITY IN THE QUASAR 3C 454.3en_US
dc.typeArticleen_US
dc.identifier.citationJorstad, Svetlana G., Alan P. Marscher, Paul S. Smith, Valeri M. Larionov, Iván Agudo, Mark Gurwell, Ann E. Wehrle, et al. “A TIGHT CONNECTION BETWEEN GAMMA-RAY OUTBURSTS AND PARSEC-SCALE JET ACTIVITY IN THE QUASAR 3C 454.3.” The Astrophysical Journal 773, no. 2 (August 5, 2013): 147. © 2013 American Astronomical Society.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorSallum, Stephanieen_US
dc.relation.journalAstrophysical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsJorstad, Svetlana G.; Marscher, Alan P.; Smith, Paul S.; Larionov, Valeri M.; Agudo, Iván; Gurwell, Mark; Wehrle, Ann E.; Lähteenmäki, Anne; Nikolashvili, Maria G.; Schmidt, Gary D.; Arkharov, Arkady A.; Blinov, Dmitry A.; Blumenthal, Kelly; Casadio, Carolina; Chigladze, Revaz A.; Efimova, Natalia V.; Eggen, Joseph R.; Gómez, José L.; Grupe, Dirk; Hagen-Thorn, Vladimir A.; Joshi, Manasvita; Kimeridze, Givi N.; Konstantinova, Tatiana S.; Kopatskaya, Evgenia N.; Kurtanidze, Omar M.; Kurtanidze, Sofia O.; Larionova, Elena G.; Larionova, Liudmilla V.; Sigua, Lorand A.; MacDonald, Nicholas R.; Maune, Jeremy D.; McHardy, Ian M.; Miller, H. Richard; Molina, Sol N.; Morozova, Daria A.; Scott, Terri; Taylor, Brian W.; Tornikoski, Merja; Troitsky, Ivan S.; Thum, Clemens; Walker, Gary; Williamson, Karen E.; Sallum, Stephanie; Consiglio, Santina; Strelnitski, Vladimiren_US
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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