2000A&A...358..451P


Query : 2000A&A...358..451P

2000A&A...358..451P - Astronomy and Astrophysics, volume 358, 451-461 (2000/6-2)

Radio variability of the gamma-ray blazar 0202+149.

PYATUNINA T.B., MARCHENKO S.G., MARSCHER A.P., ALLER M.F., ALLER H.D., TERAESRANTA H. and VALTAOJA E.

Abstract (from CDS):

Analysis of radio light curves of the γ-ray bright blazar 0202+149 at frequencies of 37, 22, 14.5, 8, and 4.8GHz during the period 1984-1998 reveals a 4-year cycle of variability with substructure on a shorter time scale of about 1.3-yr. The 4.8-37GHz spectral index of the source gradually increases from -0.04 (T=1990.2) to 0.4 (T=1996.6) and during outbursts shows strong variations with a time scale of about 1 year and an amplitude up to ∼0.4. VLBI images at 8, 22, and 43GHz show a core-dominated structure with a faint jet in the northwest direction, which we trace out to 7mas, with a bent inner part (r≤1 mas) consisting of at least 2 components. The connection of the jet activity with the 4-year cycle of total flux density variability is discussed.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: quasars: individual: 0202+149 - radio continuum: galaxies

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 4C 15.05 Bla 02 04 50.41389571 +15 14 11.0436591   21.9 22.1 21.00   ~ 383 1
2 ICRF J092703.0+390220 Sy1 09 27 03.0138528936 +39 02 20.850343332   17.17 17.00 16.486   ~ 959 1

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2022.06.27-00:32:25

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