Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543303y&link_type=abstract
American Astronomical Society, AAS Meeting #215, #433.03; Bulletin of the American Astronomical Society, Vol. 42, p.370
Astronomy and Astrophysics
Astronomy
Scientific paper
Narrow line Seyfert galaxies (NLS1) are a subclass of active galactic nuclei (AGN). They show distinctive emission line and continuum properties. We present a sample of 250 NLS1s at a redshift range between 1.5 and 3.8 from Sloan Digital Sky Survey (SDSS). This is the largest sample of high redshift NLS1s to date. Our sample selection criteria is CIV Gaussian width less than 1000 km/s (FWHM < 2350 km/s) which was followed by a visual inspection. We show that our high redshift NLS1 candidates have similar composite spectra as the low redshift NLS1s. Their black hole masses are roughly between 107 M&sun; and 108.5 M&sun; while their bolometric luminosities are roughly between 1044 and 1048 erg/s. We found a FIRST match for 34 of our NLS1s, out of which 12 are radio loud with radio luminosity (at 1.4 GHz) above 1041 erg/s.
Strauss Michael
Yesuf Hassen
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