A strong radio brightening at the jet base of M87 during the elevated very-high-energy γ-ray state in 2012

被引：0
作者：
Hada, K. [1 ,2 ]
Giroletti, M. [1 ]
Kino, M. [3 ,4 ]
Giovannini, G. [1 ,5 ]
D'Ammando, F. [1 ]
Cheung, C. C. [6 ]
Beilicke, M. [7 ,8 ]
Nagai, H. [7 ,8 ]
Doi, A. [4 ]
Akiyama, K. [2 ,9 ]
Honma, M. [2 ,10 ]
Niinuma, K. [10 ]
Casadio, C. [11 ]
Orienti, M. [1 ]
Krawczynski, H. [7 ,8 ]
Gomez, J. L. [11 ]
Sawada-Satoh, S. [2 ]
Koyama, S. [2 ,4 ,9 ]
Cesarini, A. [12 ]
Nakahara, S. [13 ]
Gurwell, M. A. [14 ]
机构：
[1] INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy
[2] Natl Astron Observ Japan, Mizusawa VLBI Observ, Mitaka, Tokyo 1818588, Japan
[3] Korea Astron & Space Sci Inst, Yusong 305348, Daejon, South Korea
[4] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan
[5] Univ Bologna, Dipartimento Fis & Astron, I-40127 Bologna, Italy
[6] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA
[7] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[8] Washington Univ, McDonnell Ctr Space Sci, St Louis, MO 63130 USA
[9] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan
[10] Grad Univ Adv Studies SOKENDAI, Dept Astron Sci, Mitaka, Tokyo 1818588, Japan
[11] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
[12] Univ Trento, Dept Phys, I-38050 Povo, Trento, Italy
[13] Kagoshima Univ, Fac Sci, Kagoshima, Kagoshima 8900065, Japan
[14] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
来源：
EXTRAGALACTIC JETS FROM EVERY ANGLE | 2015年 / 10卷 / 313期
关键词：
galaxies: active; galaxies: individual (M87); galaxies: jets; SUPERMASSIVE BLACK-HOLE; TEV EMISSION; VARIABILITY; HST-1; SITE;
D O I：
10.1017/S174392131500246X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The nearby radio galaxy M87 offers a unique opportunity for exploring the connection between gamma-ray production and jet formation at an unprecedented linear resolution. However, the origin and location of the gamma-rays in this source is still elusive. Based on previous radio/TeV correlation events, the unresolved jet base (radio core) and the peculiar knot HST-1 at > 120 pc from the nucleus are proposed as candidate site(s) of gamma-ray production. Here we report our intensive, high-resolution radio monitoring observations of the M87 jet with the VLBI Exploration of Radio Astrometry (VERA) and the European VLBI Network (EVN) from February 2011 to October 2012. During this period, an elevated level of the M87 flux is reported at TeV with VERITAS. We detected a remarkable flux increase in the radio core with VERA at 22/43 GHz coincident with the VHE activity. Meanwhile, HST-1 remained quiescent in terms of its flux density and structure at radio. These results strongly suggest that the TeV gamma-ray activity in 2012 originates in the jet base within 0.03 pc (projected) from the central supermassive black hole.
引用
收藏
页码：340 / 345
页数：6
相关论文
共 23 条
  • [1] FERMI LARGE AREA TELESCOPE GAMMA-RAY DETECTION OF THE RADIO GALAXY M87
    Abdo, A. A.
    Ackermann, M.
    Ajello, M.
    Atwood, W. B.
    Axelsson, M.
    Baldini, L.
    Ballet, J.
    Barbiellini, G.
    Bastieri, D.
    Bechtol, K.
    Bellazzini, R.
    Berenji, B.
    Blandford, R. D.
    Bloom, E. D.
    Bonamente, E.
    Borgland, A. W.
    Bregeon, J.
    Brez, A.
    Brigida, M.
    Bruel, P.
    Burnett, T. H.
    Caliandro, G. A.
    Cameron, R. A.
    Cannon, A.
    Caraveo, P. A.
    Casandjian, J. M.
    Cavazzuti, E.
    Cecchi, C.
    Celik, Oe
    Charles, E.
    Cheung, C. C.
    Chiang, J.
    Ciprini, S.
    Claus, R.
    Cohen-Tanugi, J.
    Colafrancesco, S.
    Conrad, J.
    Costamante, L.
    Cutini, S.
    Davis, D. S.
    Dermer, C. D.
    de Angelis, A.
    de Palma, F.
    Digel, S. W.
    Donato, D.
    do Couto e Silva, E.
    Drell, P. S.
    Dubois, R.
    Dumora, D.
    Edmonds, Y.
    [J]. ASTROPHYSICAL JOURNAL, 2009, 707 (01) : 55 - 60
  • [2] THE 2010 VERY HIGH ENERGY γ-RAY FLARE AND 10 YEARS OF MULTI-WAVELENGTH OBSERVATIONS OF M 87
    Abramowski, A.
    Acero, F.
    Aharonian, F.
    Akhperjanian, A. G.
    Anton, G.
    Balzer, A.
    Barnacka, A.
    de Almeida, U. Barres
    Becherini, Y.
    Becker, J.
    Behera, B.
    Bernloehr, K.
    Birsin, E.
    Biteau, J.
    Bochow, A.
    Boisson, C.
    Bolmont, J.
    Bordas, P.
    Brucker, J.
    Brun, F.
    Brun, P.
    Bulik, T.
    Buesching, I.
    Carrigan, S.
    Casanova, S.
    Cerruti, M.
    Chadwick, P. M.
    Charbonnier, A.
    Chaves, R. C. G.
    Cheesebrough, A.
    Clapson, A. C.
    Coignet, G.
    Cologna, G.
    Conrad, J.
    Dalton, M.
    Daniel, M. K.
    Davids, I. D.
    Degrange, B.
    Deil, C.
    Dickinson, H. J.
    Djannati-Atai, A.
    Domainko, W.
    Drury, L. O'C.
    Dubus, G.
    Dutson, K.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Eger, P.
    Espigat, P.
    [J]. ASTROPHYSICAL JOURNAL, 2012, 746 (02)
  • [3] Radio Imaging of the Very-High-Energy γ-Ray Emission Region in the Central Engine of a Radio Galaxy
    Acciari, V. A.
    Aliu, E.
    Arlen, T.
    Bautista, M.
    Beilicke, M.
    Benbow, W.
    Bradbury, S. M.
    Buckley, J. H.
    Bugaev, V.
    Butt, Y.
    Byrum, K.
    Cannon, A.
    Celik, O.
    Cesarini, A.
    Chow, Y. C.
    Ciupik, L.
    Cogan, P.
    Cui, W.
    Dickherber, R.
    Fegan, S. J.
    Finley, J. P.
    Fortin, P.
    Fortson, L.
    Furniss, A.
    Gall, D.
    Gillanders, G. H.
    Grube, J.
    Guenette, R.
    Gyuk, G.
    Hanna, D.
    Holder, J.
    Horan, D.
    Hui, C. M.
    Humensky, T. B.
    Imran, A.
    Kaaret, P.
    Karlsson, N.
    Kieda, D.
    Kildea, J.
    Konopelko, A.
    Krawczynski, H.
    Krennrich, F.
    Lang, M. J.
    LeBohec, S.
    Maier, G.
    McCann, A.
    McCutcheon, M.
    Millis, J.
    Moriarty, P.
    Ong, R. A.
    [J]. SCIENCE, 2009, 325 (5939) : 444 - 448
  • [4] Fast variability of tera-electron volt γ rays from the radio galaxy M87
    Aharonian, F.
    Akhperjanian, A. G.
    Bazer-Bachi, A. R.
    Beilicke, M.
    Benbow, W.
    Berge, D.
    Bernloehr, K.
    Boisson, C.
    Bolz, O.
    Borrel, V.
    Braun, I.
    Brown, A. M.
    Buehler, R.
    Buesching, I.
    Carrigan, S.
    Chadwick, P. M.
    Chounet, L. -M.
    Coignet, G.
    Cornils, R.
    Costamante, L.
    Degrange, B.
    Dickinson, H. J.
    Djannati-Atai, A.
    Drury, L. O'C.
    Dubus, G.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Feinstein, F.
    Ferrero, E.
    Fiasson, A.
    Fontaine, G.
    Funk, Seb.
    Funk, S.
    Fuessling, M.
    Gallant, Y. A.
    Giebels, B.
    Glicenstein, J. F.
    Goret, P.
    Hadjichristidis, C.
    Hauser, D.
    Hauser, M.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J. A.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, S.
    [J]. SCIENCE, 2006, 314 (5804) : 1424 - 1427
  • [5] ASADA K, 2012, APJ, V745, DOI DOI 10.1088/2041-8205/745/2/L28
  • [6] GAMMA-RAY FLARES FROM RED GIANT/JET INTERACTIONS IN ACTIVE GALACTIC NUCLEI
    Barkov, Maxim V.
    Aharonian, Felix A.
    Bosch-Ramon, Valenti
    [J]. ASTROPHYSICAL JOURNAL, 2010, 724 (02) : 1517 - 1523
  • [7] Beilicke M, 2012, ARXIV12107830 VERITA
  • [8] Superluminal radio features in the M87 jet and the site of flaring TeV gamma-ray emission
    Cheung, C. C.
    Harris, D. E.
    Stawarz, L.
    [J]. ASTROPHYSICAL JOURNAL, 2007, 663 (02) : L65 - L68
  • [9] Jet-Launching Structure Resolved Near the Supermassive Black Hole in M87
    Doeleman, Sheperd S.
    Fish, Vincent L.
    Schenck, David E.
    Beaudoin, Christopher
    Blundell, Ray
    Bower, Geoffrey C.
    Broderick, Avery E.
    Chamberlin, Richard
    Freund, Robert
    Friberg, Per
    Gurwell, Mark A.
    Ho, Paul T. P.
    Honma, Mareki
    Inoue, Makoto
    Krichbaum, Thomas P.
    Lamb, James
    Loeb, Abraham
    Lonsdale, Colin
    Marrone, Daniel P.
    Moran, James M.
    Oyama, Tomoaki
    Plambeck, Richard
    Primiani, Rurik A.
    Rogers, Alan E. E.
    Smythe, Daniel L.
    SooHoo, Jason
    Strittmatter, Peter
    Tilanus, Remo P. J.
    Titus, Michael
    Weintroub, Jonathan
    Wright, Melvyn
    Young, Ken H.
    Ziurys, Lucy M.
    [J]. SCIENCE, 2012, 338 (6105) : 355 - 358
  • [10] Is the core of M87 the source of its TeV emission? Implications for unified schemes
    Georganopoulos, M
    Perlman, ES
    Kazanas, D
    [J]. ASTROPHYSICAL JOURNAL, 2005, 634 (01) : L33 - L36
123