2000A&A...355..915A

Query : 2000A&A...355..915A

2000A&A...355..915A - Astronomy and Astrophysics, volume 355915-921 (2000/3-3)

Precession, beaming and the periodic light curve of OJ 287.

ABRAHAM Z.

Abstract (from CDS):

The strong periodic optical flares of OJ 287 are explained in terms of the increase in the beaming factor when a precessing jet approaches the line of sight. The geometrical parameters of the precession are determined from the kinematical properties of the parsec scale superluminal features in the radio jet. The possible values of the Lorentz factor γ for the bulk motion in the jet are constrained by the half-life of the optical flares. A moderate value, γ≃7, gives the best fitting to the data.

Abstract Copyright: ∼

Journal keyword(s): galaxies: BL Lacertae objects: individual: OJ 287 - galaxies: jets - radio continuum: galaxies - galaxies: magnetic fields - galaxies: photometry

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
2 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
3 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
4 Gabuzda 0851+202 K3 PoC ~ ~           ~ 7 0
5 [KWG93] OJ287 C3 Rad ~ ~           ~ 3 0
6 [KWG93] OJ287 C2 Rad ~ ~           ~ 3 0
7 [KWG93] OJ287 C1 Rad ~ ~           ~ 3 0
8 Gabuzda 0851+202 K2 PoC ~ ~           ~ 6 0
9 Gabuzda 0851+202 K1 PoC ~ ~           ~ 7 0

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