An evolving relativistic jet model for the BL Lacertae object Markarian 421

被引:13
作者
Mufson, S. L. [1 ]
Hutter, D. J.
Kondo, Y.
Urry, C. M.
Wisniewski, W. Z.
机构
[1] Indiana Univ, Dept Astron, Bloomington, IN 47405 USA
[2] USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA
[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[5] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA
关键词
BL Lacertae objects; galaxies : individual (Mrk 421); galaxies : jets; galaxies : X-rays; radiation mechanisms; ultraviolet : spectra;
D O I
10.1086/168671
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Coordinated observations of the nearby BL Lacertae object Mrk 421 obtained during 1980 May, 1984 January, and 1984 March are described. These observations give a time-frozen picture of the continuous spectrum of Mrk 421 at X-ray, ultraviolet, optical, and radio wavelengths. The observed spectra have been fitted to an inhomogeneous relativistic jet model described by Hutter and Mufson. Our studies show that it is difficult to describe the data by a single jet whose properties vary as a function of time in a self-consistent manner unless the flat spectrum, hard X-ray tail present in 1984 January is due to an additional short-lived component of emission. These)et models are compared with homogeneous, spherically symmetric, synchrotron self-Compton models for this source.
引用
收藏
页码:116 / 123
页数:8
相关论文
共 38 条
[1]  
[Anonymous], 1966, COMMUNICATIONS LUNAR
[2]  
Blandford R. D., 1978, BL LAC OBJECTS, P328
[3]   RELATIVISTIC JETS AS COMPACT RADIO-SOURCES [J].
BLANDFORD, RD ;
KONIGL, A .
ASTROPHYSICAL JOURNAL, 1979, 232 (01) :34-48
[4]   IN-FLIGHT PERFORMANCE OF IUE [J].
BOGGESS, A ;
BOHLIN, RC ;
EVANS, DC ;
FREEMAN, HR ;
GULL, TR ;
HEAP, SR ;
KLINGLESMITH, DA ;
LONGANECKER, GR ;
SPARKS, W ;
WEST, DK ;
HOLM, AV ;
PERRY, PM ;
SCHIFFER, FH ;
TURNROSE, BE ;
WU, CC ;
LANE, AL ;
LINSKY, JL ;
SAVAGE, BD ;
BENVENUTI, P ;
CASSATELLA, A ;
CLAVEL, J ;
HECK, A ;
MACCHETTO, F ;
PENSTON, MV ;
SELVELLI, PL ;
DUNFORD, E ;
GONDHALEKAR, P ;
OLIVER, MB ;
SANDFORD, MCW ;
STICKLAND, D ;
BOKSENBERG, A ;
COLEMAN, CI ;
SNIJDERS, MAJ ;
WILSON, R .
NATURE, 1978, 275 (5679) :377-385
[5]   IUE SPACECRAFT AND INSTRUMENTATION [J].
BOGGESS, A ;
CARR, FA ;
EVANS, DC ;
FISCHEL, D ;
FREEMAN, HR ;
FUECHSEL, CF ;
KLINGLESMITH, DA ;
KRUEGER, VL ;
LONGANECKER, GW ;
MOORE, JV ;
PYLE, EJ ;
REBAR, F ;
SIZEMORE, KO ;
SPARKS, W ;
UNDERHILL, AB ;
VITAGLIANO, HD ;
WEST, DK ;
MACCHETTO, F ;
FITTON, B ;
BARKER, PJ ;
DUNFORD, E ;
GONDHALEKAR, PM ;
HALL, JE ;
HARRISON, VAW ;
OLIVER, MB ;
SANDFORD, MCW ;
VAUGHAN, PA ;
WARD, AK ;
ANDERSON, BE ;
BOKSENBERG, A ;
COLEMAN, CI ;
SNIJDERS, MAJ ;
WILSON, R .
NATURE, 1978, 275 (5679) :372-377
[6]  
Colla G., 1975, Astronomy and Astrophysics Supplement Series, V20, P1
[7]   EINSTEIN (HEAO-2) X-RAY-OBSERVATORY [J].
GIACCONI, R ;
BRANDUARDI, G ;
BRIEL, U ;
EPSTEIN, A ;
FABRICANT, D ;
FEIGELSON, E ;
FORMAN, W ;
GORENSTEIN, P ;
GRINDLAY, J ;
GURSKY, H ;
HARNDEN, FR ;
HENRY, JP ;
JONES, C ;
KELLOGG, E ;
KOCH, D ;
MURRAY, S ;
SCHREIER, E ;
SEWARD, F ;
TANANBAUM, H ;
TOPKA, K ;
VANSPEYBROECK, L ;
HOLT, SS ;
BECKER, RH ;
BOLDT, EA ;
SERLEMITSOS, PJ ;
CLARK, G ;
CANIZARES, C ;
MARKERT, T ;
NOVICK, R ;
HELFAND, D ;
LONG, K .
ASTROPHYSICAL JOURNAL, 1979, 230 (02) :540-550
[8]  
HEILES C, 1975, ASTR AP S, V20, P49
[9]   CCD PHOTOMETRY OF MARKARIAN 421 AND 501 [J].
HICKSON, P ;
FAHLMAN, GG ;
AUMAN, JR ;
WALKER, GAH ;
MENON, TK ;
NINKOV, Z .
ASTROPHYSICAL JOURNAL, 1982, 258 (01) :53-58
[10]   AN OPTICAL AND X-RAY SURVEY OF S-TYPE MARKARIAN GALAXIES [J].
HUTTER, DJ ;
MUFSON, SL .
ASTRONOMICAL JOURNAL, 1981, 86 (11) :1585-1594