Large Angle Bending of the Light-Month Jet in Centaurus A.
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Accession number;01A0179284
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| Title;Large Angle Bending of the Light-Month Jet in Centaurus A. |
| Author;
FUJISAWA K
(National Astronomical Observatory, Tokyo)
INOUE M
(National Astronomical Observatory, Tokyo)
KOBAYASHI H
(National Astronomical Observatory, Tokyo)
MURATA Y
(Inst. Space And Astronautical Sci., Kanagawa)
WAJIMA K
(Inst. Space And Astronautical Sci., Kanagawa)
KAMENO S
(National Astronomical Observatory, Tokyo)
EDWARDS P G
(Inst. Space And Astronautical Sci., Kanagawa)
HIRABAYASHI H
(Inst. Space And Astronautical Sci., Kanagawa)
MORIMOTO M
(Nishi-harima Astronomical Observatory, Hyogo)
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Journal Title;Publ Astron Soc Jpn
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Journal Code:G0279A
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ISSN:0004-6264
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VOL.52;NO.6;PAGE.1021-1026(2000)
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| Figure&Table&Reference;FIG.4, TBL.1, REF.20 |
| Pub. Country;Japan |
| Language;English |
| Abstract;An intercontinental VLBI observation of Cen A is presented. We found that the jet exhibits bending with an angle of 60.DEG. at 2 light-months from the core. Because of the large viewing angle of the jet in Cen A, this bending should be a real bend of this magnitude, rather than a projection effect. Two possible interpretations of the bending jet-jet collision with ambient matter, and a changing angle of jet ejection-have been considered and rejected. The possibility is discussed that the observed bending of Cen A is an apparent bend resulting from observing a limb-brightened jet with insufficient resolution, and compared with a numerical simulation of a jet. Another implication of the bending jet is discussed based on a similarity with two other AGNs, 3C 273 and Vir A, in which similar features have been reported on the light-months scale. The relationship between the mass and the structure scale in Vir A and Cen A is very similar. This feature in Cen A suggests that such mis-alignments on the light-month scale are common and are related to the formation mechanism of AGN jets. (author abst.) |
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