2012ApJ...754..114H

Query : 2012ApJ...754..114H

2012ApJ...754..114H - Astrophys. J., 754, 114 (2012/August-1)

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.

HAYASHIDA M., MADEJSKI G.M., NALEWAJKO K., SIKORA M., WEHRLE A.E., OGLE P., COLLMAR W., LARSSON S., FUKAZAWA Y., ITOH R., CHIANG J., STAWARZ L., BLANDFORD R.D., RICHARDS J.L., MAX-MOERBECK W., READHEAD A., BUEHLER R., CAVAZZUTI E., CIPRINI S., GEHRELS N., REIMER A., SZOSTEK A., TANAKA T., TOSTI G., UCHIYAMA Y., KAWABATA K.S., KINO M., SAKIMOTO K., SASADA M., SATO S., UEMURA M., YAMANAKA M., GREINER J., KRUEHLER T., ROSSI A., MacQUART J.P., BOCK D.C.-J., VILLATA M., RAITERI C.M., AGUDO I., ALLER H.D., ALLER M.F., ARKHAROV A.A., BACH U., BENITEZ E., BERDYUGIN A., BLINOV D.A., BLUMENTHAL K., BOTTCHER M., BUEMI C.S., CAROSATI D., CHEN W.P., PAOLA A.D., DOLCI M., EFIMOVA N.V., FORNE E., GOMEZ J.L., GURWELL M.A., HEIDT J., HIRIART D., JORDAN B., JORSTAD S.G., JOSHI M., KIMERIDZE G., KONSTANTINOVA T.S., KOPATSKAYA E.N., KOPTELOVA E., KURTANIDZE O.M., LAHTEENMAKI A., LAMERATO A., LARIONOV V.M., LARIONOVA E.G., LARIONOVA L.V., LETO P., LINDFORS E., MARSCHER A.P., McHARDY I.M., MOLINA S.N., MOROZOVA D.A., NIKOLASHVILI M.G., NILSSON K., REINTHAL R., ROUSTAZADEH P., SAKAMOTO T., SIGUA L.A., SILLANPAA A., TAKALO L., TAMMI J., TAYLOR B., TORNIKOSKI M., TRIGILIO C., TROITSKY I.S. and UMANA G.

Abstract (from CDS):

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.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: jets - gamma rays: galaxies - quasars: individual: 3C 279 - radiation mechanisms: non-thermal - X-rays: galaxies

Simbad objects: 12

Full paper

View the references in ADS

Number of rows : 12

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	3C 66A	BLL	02 22 39.6114771888	+43 02 07.799534304		15.71	15.21	14.5	~	942	2
2	V* CC Cas	SB*	03 14 05.3361655368	+59 33 48.485582712	7.07	7.56	7.08		O8.5III(n)((f))	308	0
3	HD 25443	*	04 06 08.0655259656	+62 06 06.607649268	6.45	6.998	6.766		B0.5III	155	0
4	PG 0851+202	BLL	08 54 48.8749846272	+20 06 30.639583620		15.649	15.146	15.446	~	2513	1
5	7C 122223.5+213929	Bla	12 24 54.4583146056	+21 22 46.385507388		17.56	17.50	18.2	~	770	2
6	3C 273	BLL	12 29 06.6998257176	+02 03 08.597629980		13.05	14.830	14.11	~	6022	1
7	PSR J1231-1411	Psr	12 31 11.3069	-14 11 43.628					~	139	0
8	3C 279	Bla	12 56 11.16657958	-05 47 21.5251510		18.01	17.75	15.87	~	3205	2
9	3C 286	Sy1	13 31 08.2883506368	+30 30 32.960091564		17.51	17.25		~	4558	2
10	QSO B1502+1041	Bla	15 04 24.97978391	+10 29 39.1985309		18.97	18.56	18.94	~	634	1
11	QSO J1512-0906	Bla	15 12 50.53293048	-09 05 59.8297908		16.74	16.54		~	1409	1
12	3C 454.3	Bla	22 53 57.7480438728	+16 08 53.561508864		16.57	16.10	15.22	~	3004	2

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