2004A&A...419..913O


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.01CEST04:59:37

2004A&A...419..913O - Astronomy and Astrophysics, volume 419, 913-925 (2004/6-1)

Helical jets in blazars. Interpretation of the multifrequency long-term variability of AO 0235+16.

OSTORERO L., VILLATA M. and RAITERI C.M.

Abstract (from CDS):

The long-term variability of the multiwavelength blazar emission can be interpreted in terms of orientation variations of a helical, inhomogeneous, non-thermally emitting jet, possibly caused by the orbital motion of the parent black hole in a binary system (Villata & Raiteri, 1999A&A...347...30V). The helical-jet model is here applied to explain the quasi-periodic radio-optical light curves and the broad-band spectral energy distributions (SEDs) of the BL Lac object AO 0235+16. Through a suitable choice of the model parameters, the helix rotation can well account for the periodicity of the main radio and optical outbursts and for the corresponding SED variability, while the interspersed minor radio events could be interpreted as due either to some local distortions of the helical structure or to other phenomena contributing to the source emission. In particular, the probable existence of flow instabilities provides a viable interpretation for the non-periodic features.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: BL Lacertae objects: general - galaxies: BL Lacertae objects: individual: AO 0235+16 - galaxies: jets - galaxies: nuclei - galaxies: quasars: general

Status at CDS:  

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1381 2
2 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1116 1
3 6C 095456+654857 BLL 09 58 47.2452838930 +65 33 54.821524491     17.0 15.75   ~ 609 1
4 7C 1219+2830 BLL 12 21 31.6902446545 +28 13 58.500383827   16.81 16.11 14.24   ~ 772 1
5 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1899 2

    Equat.    Gal    SGal    Ecl

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2020.04.01-04:59:37

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