Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..619g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Oct. 1, 1986, p. 619-627.
Astronomy and Astrophysics
Astronomy
1
Bl Lacertae Objects, Luminosity, Quasars, Red Shift, Seyfert Galaxies, X Ray Sources, Active Galactic Nuclei, Data Processing, Elliptical Galaxies, Irregular Galaxies, Spiral Galaxies
Scientific paper
An analysis performed on a sample of 191 extragalactic X-ray sources of different classes (QSOs, Seyfert Galaxies, BL Lac, elliptical and S0, spiral and irregular galaxies) appears to show a general relationship between log z and the logarithm of the 2 keV equivalent monochromatic luminosity of the brightest object in a given redshift interval (regardless of the class of the object). This function is almost constant for z less than 0.001; it has a continuous inflection of about two orders of magnitude between z = 0.001 and z = 0.01, and at z greater than 0.01, where only AGNs are present, it matches with a straight line, with slope equal to 1.6. It is suggested that such a smooth function implies a physical continuity of these objects.
Giovannelli Franco
Polcaro Vito Francesco
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