Zobrazeno 1 - 10
of 366
pro vyhledávání: '"de Ruiter, H"'
Publikováno v:
A&A 621, A19 (2019)
It is now established that the faint radio population is a mixture of star-forming galaxies and faint active galactic nuclei (AGNs), with the former dominating below S(1.4GHz) \sim 100 muJy and the latter at larger flux densities. The faint radio AGN
Externí odkaz:
http://arxiv.org/abs/1811.07938
The dying radio sources represent a very interesting and largely unexplored stage of the active galactic nucleus (AGN) evolution. They are considered to be very rare, and almost all of the few known ones were found in galaxy clusters. However, consid
Externí odkaz:
http://arxiv.org/abs/1210.6864
Autor:
Murgia, M., Parma, P., Mack, K. -H., de Ruiter, H. R., Fanti, R., Govoni, F., Tarchi, A., Giacintucci, S., Markevitch, M.
We present the study of five `dying' nearby radio galaxies belonging to the WENSS minisurvey and to the B2 bright catalogs: WNB1734+6407, WNB1829+6911, WNB1851+5707, B2 0120+33, and B2 1610+29. These sources have been selected on the basis of their e
Externí odkaz:
http://arxiv.org/abs/1011.0567
Publikováno v:
2010, A&A, 523, A38
Context. It has recently been proposed that the jets of low-luminosity radio galaxies are powered by direct accretion of the hot phase of the IGM onto the central black hole. Cold gas remains a plausible alternative fuel supply, however. The most com
Externí odkaz:
http://arxiv.org/abs/1009.0156
[Abridged] Physical and evolutionary properties of the sub-mJy radio population are not entirely known. The radio/optical analysis of the ATESP 5 GHz sample has revealed a significant class of compact flat/inverted radio-spectrum sources associated t
Externí odkaz:
http://arxiv.org/abs/0911.2697
The photometric, structural and kinematical properties of the centers of elliptical galaxies, harbor important information of the formation history of the galaxies. In the case of non active elliptical galaxies these properties are linked in a way th
Externí odkaz:
http://arxiv.org/abs/0910.0716
Autor:
Morganti, R., Peck, A. B., Oosterloo, T. A., van Moorsel, G., Capetti, A., Fanti, R., Parma, P., de Ruiter, H. R.
We present WSRT, VLA and VLBI observations of the HI absorption in the radio galaxy NGC 315. The main result is that two HI absorbing systems are detected against the central region. In addition to the known highly redshifted, very narrow component,
Externí odkaz:
http://arxiv.org/abs/0908.3951
Autor:
Bardelli, S., Zucca, E., Bolzonella, M., Ciliegi, P., Gregorini, L., Zamorani, G., Bondi, M., Zanichelli, A., Tresse, L., Vergani, D., Gavignaud, I., Bongiorno, A., Bottini, D., Garilli, B., Brun, V. Le, Fevre, O. Le, Maccagni, D., Scaramella, R., Scodeggio, M., Vettolani, G., Adami, C., Arnouts, S., Cappi, A., Charlot, S., Contini, T., Foucaud, S., Franzetti, P., Guzzo, L., Ilbert, O., Iovino, A., Lamareille, F., McCracken, H. J., Marano, B., Marinoni, C., Mazure, A., Meneux, B., Merighi, R., Paltani, S., Pello`, R., Pollo, A., Pozzetti, L., Radovich, M., Abbas, U., Brinchmann, J., Cucciati, O., de la Torre, S., de Ravel, L., Memeo, P., Perez-Montero, E., Mellier, Y., Merluzzi, P., Temporin, S., De Ruiter, H. R., Parma, P.
(abridged) We use the 1.4 GHz VIMOS-VLA Deep Survey and the optical VVDS and the CFHT-LS to compare the properties of radio loud galaxies with respect to the whole population of optical galaxies. The availability of multiband photometry and high qual
Externí odkaz:
http://arxiv.org/abs/0811.1653
Autor:
Prandoni, I., Parma, P., Mignano, A., de Ruiter, H. R., Gregorini, L., Vettolani, G., Wieringa, M. H., Ekers, R. D.
We use deep multi-colour (UBVRIJK) images mostly taken in the framework of the ESO Deep Public Survey (DPS) to optically identify and derive photometric redshifts for a complete sample of 131 radio sources with S>0.4 mJy, observed at both 1.4 and 5 G
Externí odkaz:
http://arxiv.org/abs/0806.1623
Autor:
Mignano, A., Prandoni, I., Gregorini, L., Parma, P., de Ruiter, H. R., Wieringa, M. H., Vettolani, G., Ekers, R. D.
One of the most debated issues about sub-mJy radio sources, which are responsible for the steepening of the 1.4 GHz source counts, is the origin of their radio emission. Particularly interesting is the possibility of combining radio spectral index in
Externí odkaz:
http://arxiv.org/abs/0710.5682