Skip to main content
SpringerLink
Log in

Variability in the southern blazars PKS 1921-293 and PKS 2155-152

  • Published:
Astrophysics and Space Science Aims and scope Submit manuscript

Abstract

We report results of 1435 MHz rapid variability observations of the southern extragalactic sources PKS 1921-293 and PKS 2155-152. Both objects displayed variability in their flux densities on timescales of the order of one and two weeks, respectively. A brief discussion on the origin of this variability is presented, with a comparison of different models that could account for the observations.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Abramowicz, M.A.: 1992, inExtragalactic Radio Sources: From Beams to Jets, Roland, J., Sol, H. and Pelletier, G. (eds.), Cambridge University Press, Cambridge.

    Google Scholar 

  • Altschuler, D.R. and Wardle, J.F.C.: 1976,Mem. Roy. Astron. Soc. 82, 1.

    Google Scholar 

  • Altschuler, D.R.: 1982,Astron. J. 87, 387.

    Google Scholar 

  • Altschuler, D.R.: 1983,Astron. J. 88, 16.

    Google Scholar 

  • Benford, G.: 1992,Astrophys. J. 391, L59.

    Google Scholar 

  • Berkhuijsen, E.M., Haslam, C.G.T. and Salter, C.J.: 1971,Acta Astron. 14, 252.

    Google Scholar 

  • Blandford, R.D. and McKee, C.F.: 1976,Phys. Fluids 19, 1130.

    Google Scholar 

  • Blandford, R.D. and Cowie, L.L.: 1982,Astrophys. J. 260, 625.

    Google Scholar 

  • Blandford, R.D., Narayan, R. and Romani, R.W.: 1986,Astrophys. J. 301, L53.

    Google Scholar 

  • Burbidge, G. and Hewitt, A.: 1992, inVariability in Blazars, Valtaoja, E. and Valtonen, M. (eds.), Cambridge University Press, Cambridge, p. 4.

    Google Scholar 

  • Craine, E.R., Strittmatter, P.A. and Tapia, S.et al.: 1976,Astrophys. Lett. 17, 123.

    Google Scholar 

  • Dent, W.A. and Balonek, T.J.: 1980,Nature 283, 747.

    Google Scholar 

  • Elliott, K.H.: 1970,Nature 226, 1236.

    Google Scholar 

  • Fiedler, R.L., Dennison, B., Johnston, K.J. and Hewish, A.: 1987,Nature 326, 675.

    Google Scholar 

  • Giacani, E.B. and Colomb, F.R.: 1988,Acta Astron. Sinica 76, 15.

    Google Scholar 

  • Gopal-Krishna and Wiita, P.J.: 1992,Acta Astron. Sinica 259, 109.

    Google Scholar 

  • Haslam, C.G.T., Kahn, F.D. and Meaburn, J.: 1971,Acta Astron. 12, 388.

    Google Scholar 

  • Heeschen, D.S., Krichbaum, T. and Schalinski, C.J.et al.: 1987,Astron. J. 94, 1493.

    Google Scholar 

  • Kesteven, M.J.L., Bridle, A.H. and Brandie, G.W.: 1976,Astron. J. 81, 919.

    Google Scholar 

  • Krichbaum, T.P., Quirrenbach, A. and Witzel, A., 1992, inVariability in Blazars, Valtaoja, E. and Valtonen, M. (eds.), Cambridge University Press, Cambridge, p. 331.

    Google Scholar 

  • Ledden, J.E. and O'Dell, S.L.: 1985,Astrophys. J. 298, 630.

    Google Scholar 

  • Luna, H.G., Martínez, R., Combi, J.A. and Romero, G.E.: 1993,Acta Astron. 269, 77.

    Google Scholar 

  • Marscher, A.P.: 1990, inParsec-Scale Radio Jets, Zensus, J.A. and Pearson, T.J. (eds.), Cambridge University Press, Cambridge, p. 236.

    Google Scholar 

  • Marscher, A.P.: 1992, inPhysics of Active Galactic Nuclei, Duschl, W.J. and Wagner, S.J. (eds.), Springer-Verlag, Heidelberg, p. 510.

    Google Scholar 

  • Marscher, A.P., Gear, W.K. and Travis, J.P.: 1992, inVariability in Blazars, Valtaoja, E. and Valtonen, M. (eds.), Cambridge University Press, Cambridge, p. 85.

    Google Scholar 

  • Pacholczyk, A.G.: 1970,Radio Astrophysics, Freeman, San Francisco.

    Google Scholar 

  • Porcas, R.W.: 1987, inSuperluminal Radio Sources, Zensus, J.A. and Pearson, T.J. (eds.), Cambridge University Press, Cambridge, p. 12.

    Google Scholar 

  • Preston, R.A.et al.: 1989,Astron. J. 98, 1.

    Google Scholar 

  • Rickett, B.J.: 1986,Astrophys. J. 307, 564.

    Google Scholar 

  • Romani, R.W., Blandford, R.D. and Cordes, J.M.: 1987,Nature 328, 324.

    Google Scholar 

  • Romani, R.W.: 1988, inRadio Wave Scattering in the Interstellar Medium, Cordes, J.M., Rickett, B.J. and Backer, D.C. (eds.), American Institute of Physics, New York, p. 156.

    Google Scholar 

  • Romero, G.E., Combi, J.A. and Colomb, F.R.: 1994,Acta Astron. 288, 731.

    Google Scholar 

  • Romero, G.E., Combi, J.A. and Vucetich, H.: 1995a,Astrophys. Space Sci. (in press).

  • Romero, G.E., Benaglia, P. and Combi, J.A.: 1995b,Acta Astron. (in press).

  • Simonetti, J.H., Cordes, J.M. and Heeschen, D.S.: 1985,Astrophys. J. 296, 46.

    Google Scholar 

  • Wambsganss, J., Schneider, P., Quirrenbach, A. and Witzel, A.: 1989,Acta Astron. 224, L9.

    Google Scholar 

  • Wardle, J.F. C., Moore, R.L. and Angel, J.R.P.: 1984,Astrophys. J. 279, 93.

    Google Scholar 

  • Wills, B.J.: 1975,Australian J. Phys. Suppl. 38, 65.

    Google Scholar 

  • Wills, D. and Wills, B.J.: 1981,Nature 289, 384.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Instituto Argentino de Radioastronomía, Argentina

    G. E. Romero & J. A. Combi

  2. Instituto Argentino de Radioastronomía, C.C.5, (1894) Villa Elisa, Bs., As., Argentina

    G. E. Romero

Authors
  1. G. E. Romero
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. A. Combi
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Fellow of CONICET.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Romero, G.E., Combi, J.A. Variability in the southern blazars PKS 1921-293 and PKS 2155-152. Astrophys Space Sci 229, 23–32 (1995). https://doi.org/10.1007/BF00658563

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00658563

Keywords

Search

Navigation