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High Frequency Peakers

Published online by Cambridge University Press:  05 March 2013

Daniele Dallacasa
Daniele Dallacasa*
Affiliation:
Dipartimento di Astronomia, Università di Bologna, Via Ranzani 1, I-40127, Bologna, Italy. ddallaca@ira.cnr.it
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Abstract

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There is quite a clear anticorrelation between the intrinsic peak frequency and the overall radio source size in compact steep spectrum (CSS) and gigahertz peaked spectrum (GPS) radio sources. This feature is interpreted in terms of synchrotron self-absorption (although free–free absorption may play a role as well) of the radiation emitted by a small radio source which is growing within the inner region of the host galaxy. This leads to the hypothesis that these objects are young and that the radio source is still developing/expanding within the host galaxy itself.

Very young radio sources must have the peak in their radio spectra occurring above a few tens of gigahertz, and for this reason they are termed high frequency peakers (HFPs). These newly born radio sources must be very rare given that they spend very little time in this stage. H o = 100 km s−1 Mpc−1 and q o = 0.5 are used throughout this paper.

Keywords

galaxies: activeradio continuum: galaxies

Information

Type
GPS/CSS Workshop
Information
Publications of the Astronomical Society of Australia , Volume 20 , Issue 1 , 2003 , pp. 79 - 84
Copyright
Copyright © Astronomical Society of Australia 2003

References

Alberdi, A., Gómez, J. L., Marcaide, J. M., Marscher, A. P., & Pérez-Torres, M. A. 2000, A&A, 361, 529 Google Scholar
Begelman, M. C. 1996, in Cygnus A — Study of a Radio Galaxy, ed. C. L. Carilli & D. E. Harris (Cambridge: Cambridge University Press), 209 Google Scholar
Bicknell, G. V., Dopita, M. A., & O'Dea, C. P. 1997, ApJ, 485, 112 Google Scholar
Carvalho, J. C. 1985, MNRAS, 215, 463 Google Scholar
Condon, J. J., Cotton, W. D., Greisen, E. W., Yin, Q. F., Perley, R. A., Taylor, G. B., Broderick, J. J. 1998, AJ, 115, 1693 Google Scholar
Cotton, W. D., et al. 2003, PASA, 20, 12 Google Scholar
Dallacasa, D., Falomo, R., & Stanghellini, C. 2002, A&A, 382, 53 Google Scholar
Dallacasa, D., Stanghellini, C., Centonza, M., & Fanti, R. 2000, A&A, 363, 887 Google Scholar
de Vries, W. H., O'Dea, C. P., Perlman, E., Baum, S. A., Lehnert, M. D., Stocke, J., Rector, T., & Elston, R. 1998, ApJ, 503, 138 Google Scholar
Edge, A. C., Jones, M., Saunders, R., Pooley, G., & Grainge, K. 1996, in Proceedings of the Second Workshop on GPS and CSS Radio Sources, ed. I.A.G. Snellen et al. (Leiden: Leiden Observatory), 43 Google Scholar
Fanti, C., Fanti, R., Dallacasa, D., Schilizzi, R. T., Spencer, R. E., & Stanghellini, C. 1995, A&A, 302, 317 Google Scholar
Fanti, C., et al. 2000, A&A, 358, 499 Google Scholar
Gelderman, R. 1996, in Proceedings of the Second Workshop on GPS and CSS Radio Sources, ed. I. A. G. Snellen et al. (Leiden: Leiden Observatory), 208 Google Scholar
Gregory, P. C., Scott, W. K., Douglas, K., & Condon, J. J. 1996, ApJS, 103, 427 Google Scholar
Kameno, S., Horiuchi, S., Shen, Z. Q., Inoue, M., Kobayashi, H., Hirabayashi, H., & Murata, Y. 2000, PASJ, 52, 209 Google Scholar
Kameno, S., et al. 2003, PASA, 20, in pressGoogle Scholar
Murgia, M., Fanti, C., Fanti, R., Gregorini, L., Klein, U., Mack, K.-H., & Vigotti, M. 1999, A&A, 345, 769 Google Scholar
Murgia, M. 2003, PASA, 20, 19 Google Scholar
Mutoh, M., Inoue, M., Kameno, S., Asada, K., Kenta, F., & Uchida, Y. 2002, PASJ, 54, 131 Google Scholar
O'Dea, C. P. 1998, PASP, 110, 493 CrossRefGoogle Scholar
Owsianik, I., & Conway, J. E. 1998, A&A, 337, 69 Google Scholar
Owsianik, I., Conway, J. E., & Polatidis, A. G. 1998, A&A, 336, L37 Google Scholar
Phillips, R. B., & Mutel, R. L. 1982, A&A, 106, 21 Google Scholar
Polatidis, A. G., & Conway, J. E. 2003, PASA, 20, 69 Google Scholar
Readhead, A. C. S., Taylor, G. B., Pearson, T. J., & Wilkinson, P. N. 1996, ApJ, 460, 634 CrossRefGoogle Scholar
Schoenmakers, A. P., Mack, K.-H., de Bruyn, A. G., Röttgering, H. J. A., Klein, U., & van der Laan, H. 2000, MNRAS, 315, 371 Google Scholar
Snellen, I. A. G., Bremer, M. N., Schilizzi, R. T., Miley, G. K., & van Ojik, R. 1998, MNRAS, 279, 1294 Google Scholar
Snellen, I. A. G., Schilizzi, R. T., Miley, G. K., de Bruyn, A. G., Bremer, M. N., & Röttgering, H. J. A. 2000, MNRAS, 319, 445 Google Scholar
Spoelstra, T. A. T., Patnaik, A. R., & Gopal-Krishna, 1985, A&A, 152, 38 Google Scholar
Stanghellini, C., Baum, S. A., O'Dea, C. P., & Morris, G. B. 1990, A&A, 233, 379 Google Scholar
Stanghellini, C., O'Dea, C. P., Dallacasa, D., Baum, S. A., Fanti, R., & Fanti, C. 1998, A&AS, 131, 303 Google Scholar
Tinti, S., Dallacasa, D., Stanghellini, C., & Celotti, A. 2003, PASA, 20, in pressGoogle Scholar
Urry, C. M., & Padovani, P. 1995, PASP, 107, 803 CrossRefGoogle Scholar
van Breugel, W. J. M. 1984, in VLBI and Compact Radio Sources, IAU Symposium 110, ed. R. Fanti, K. I. Kellerman, & G. Setti (Dordrecht: Reidel), 59 Google Scholar
Vermeulen, R. C., Ogle, P. M., Tran, H. D., Browne, I. W. A., Cohen, M. H., Readhead, A. C. S., Taylor, G. B., & Goodrich, R. W. 1995, ApJ, 452, L5 CrossRefGoogle Scholar