Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-30T04:29:41.386Z Has data issue: false hasContentIssue false
  • English
  • Français

CSS versus Large Size Sources

Published online by Cambridge University Press:  25 May 2016

R. Fanti  and
R. E. Spencer
R. Fanti
Affiliation:
1 Istituto di Radioastronomia del CNR, Bologna
R. E. Spencer
Affiliation:
2 Nuffield Radio Astronomy Laboratories, University of Manchester, Jodrell Bank

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A large fraction of the sources in flux density limited radio samples have angular sizes < 2 arcsec (and hence projected linear sizes ≤ 10–15 kpc for H 0 = 100 Km/(sec Mpc), and steep (α > 0.5, S∝ v –α) high frequency spectra (Kapahi, 1981; Peacock and Wall 1982). The proportion of these Compact Steep–spectrum Sources (CSSs) is high (15–30% depending on the selection frequency) amongst distant (z > 0.2) radio sources of high power, both galaxies and quasars. We include in this class the GHz Peaked Spectrum Radio Sources (GPS), sub–kpc objects whose radio spectra are peaked at GHz frequencies (see, e.g., O'Dea et al, 1991).

Type
Properties of Radio Sources
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 63 - 66
Copyright
Copyright © Kluwer 1996 

References

Baldwin, J., in Extragalactic Radio Sources , IAU Symp. 97, Heeschen, D.S. and Wade, C.M., Reidel, 1982, 21Google Scholar
van Breugel, W.J.M., Miley, G.K., Heckman, T.A., 1984, Astron. J. 89, 5 CrossRefGoogle Scholar
Carvahlo, J.C., 1985, Monthly Notices Roy. Astron. Soc. 215, 463 CrossRefGoogle Scholar
de Young, D.S., 1993, Astrophys. J. 402, 95 CrossRefGoogle Scholar
Fanti, R., Fanti, C., Schilizzi, R.T., Spencer, R.E., Rendong, Nan, Parma, P., van Breugel, W.J.M., Venturi, T., 1990, Astron. Astrophys. 231, 333 Google Scholar
Fanti, C., Fanti, R., Dallacasa, D., Schilizzi, R.T., Spencer, R.E., Stanghellini, C., 1995, Astron. Astrophys. , 302, 317 Google Scholar
Kapahi, V.K., 1981, Astron. Astrophys. Suppl. 43, 381 Google Scholar
Mutel, R.L. and Phillips, R.B., in The impact of VLBI on Astrophysics and Geophysics , IAU Symp. 129, Reid, M.J. and Moran, J.M., Reidel, 1988, 73 CrossRefGoogle Scholar
O'Dea, C.P., Baum, S.A., Stanghellini, C., 1991, Astrophys. J. 380, 66 CrossRefGoogle Scholar
Peacock, J.A., Wall, J.V., 1982, Monthly Notices Roy. Astron. Soc. 198, 843 CrossRefGoogle Scholar
Phillips, T.J., Mutel, R.L., 1982, Astron. Astrophys. 106, 21 Google Scholar
Readhead, A.C.S., 1995a, Quasars and AGN: High Resolution Imaging , Irvine 1995, eds. Cohen, and Kellermann, , Publications National Academy of Sciences, in press Google Scholar
Readhead, A.C.S., Taylor, G.B., Pearson, T.J., Wilkinson, P.N., 1995b, Astrophys. J , in press Google Scholar
Sanghera, H.S., Saikia, D.J., Ludke, E., Spencer, R.E., Foulsham, P.A., Akujor, C.E., Tzioumis, A.K., 1994, Astron. Astrophys. in press Google Scholar
Scheuer, P.A.G., 1974, Monthly Notices Roy. Astron. Soc. 166,513 CrossRefGoogle Scholar
Spencer, R.E., 1994, in Compact Extragalactic Radio Sources , Proceedings of a workshop held at Socorro, eds. Zensus, J.A. and Kellermann, K.I., p. 35 Google Scholar