On the photometric redshift estimates for FR II radio galaxies
نویسندگان
چکیده
منابع مشابه
The nuclear radio – optical properties of intermediate redshift FR II radio galaxies and quasars ⋆
We extend the study of the nuclei of 3CR objects as seen with the HST to higher redshift FR II radio sources (0.4 < z < 0.6). Our results reflect what has been found for FR II of lower redshift. The position of the nuclei on the plane formed by optical and radio luminosities is related to their optical spectral classification: the nuclei of both high and low excitation galaxies lie on the corre...
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We present a new tool for the photometric estimate of stellar masses in distant galaxies. The observed source spectral energy distributions are fitted by combining sets of various single stellar populations, with different normalizations and different amounts of dust extinction, for a given (Salpeter) IMF. This treatment gives us the best flexibility and robustness when dealing with the widest ...
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In the radio – host galaxy optical luminosity plane FR I and FR II radio–galaxies are clearly divided. Since the optical luminosity of an elliptical galaxy is an indication of the mass of its central black hole, we propose that the FR I–FR II dividing luminosity is a function of the mass of the black hole powering the active nucleus. Furthermore, as the radio power gives an estimate of the tota...
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We discuss CSS radio galaxies from 2 samples of radio sources. The rst sample is a complete sample of 28 3CR galaxies with redshifts in the range 0:6 < z < 1:8 for which we have HST, UKIRT and VLA imaging data. The 2 CSS galaxies contained in this sample, 3C49 and 3C241, appear to be less active than galaxies with radio sizes of order 50{100 kpc, but similar in activity to galaxies with radio s...
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ژورنال
عنوان ژورنال: Astronomy Letters
سال: 2005
ISSN: 1063-7737,1562-6873
DOI: 10.1134/1.1896065