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The Environment of OJ 287: Nearby Galaxies and a Long Optical Jet?

Published online by Cambridge University Press:  25 May 2016

A. Sillanpää ,
L. Takalo ,
K. Nilsson ,
T. Pursimo ,
P. Teerikorpi ,
J. Heidt ,
D. Dultzin-Hacyan  and
E. Benítez
A. Sillanpää
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
L. Takalo
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
K. Nilsson
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
T. Pursimo
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
P. Teerikorpi
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
J. Heidt
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
D. Dultzin-Hacyan
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico
E. Benítez
Affiliation:
Tuorla Observatory FIN-21500 Piikkiö, Finland Landessternwarte Königstuhl D-69117 Heidelberg, Germany Instituto de Astronomía-UNAM Apdo. postal 70-264, 04510 Mexico, D.F. Mexico

Extract

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A widely accepted model for BL Lac objects is that they are radio galaxies with a relativistic jet pointing almost directly towards us. But we need a clear trigger mechanism for these jets. One possibility is the close interaction between the BL Lac host and the closeby galaxies (e.g. Heckman et al. 1986). This interaction has been seen many times in the case of quasars (Hutchings et al. 1989) but not so much is known about the close surroundings of the BL Lac objects although there has been some pioneer work like Stickel et al. (1993). The problem has usually been that the images are not deep enough and that the seeing has not been so good. To clarify the situation we have started an observing program to get very deep images in the sub-arcsecond seeing conditions from the whole 1 Jy sample (Stickel et al. 1991) of BL Lac objects. The aims of this study are: 1. to search for very close companions to the BL Lacs, 2. to study the large scale galaxy clustering around the BL Lacs and 3. to study the BL Lac hosts themselves.

Type
Properties of Radio Sources
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 47 - 48
Copyright
Copyright © Kluwer 1996 

References

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