A study of the 15-mu m quasars in the ELAIS N1 and N2 fields

作者：Afonso Luis A^*; Hatziminaoglou E; Perez Fournon I; Gonzalez Solares EA; Rowan Robinson M; Vaccari M; Lari C; Serjeant S; Oliver S; Hernan Caballero A; Montenegro Montes FM

来源：Monthly Notices of the Royal Astronomical Society, 2004, 354(4): 961-970.

DOI：10.1111/j.1365-2966.2004.08264.x

• techniques : photometric
• quasars : emission lines
• quasars : general
• infrared : general

This paper discusses the properties of the European Large Area ISO Survey (ELAIS) 15-mum quasars and tries to establish a robust method of quasar selection for future use within the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE) framework. The importance of good-quality ground-based optical data is stressed, both for the selection of candidates and for the estimation of photometric redshifts. Colour-colour plots and template fitting are used for these purposes. The properties of the 15-mum quasar sample, including variability and black hole masses, are studied and compared to the properties of other quasars that lie within the same fields but have no mid-infrared counterparts. The two subsamples do not present substantial differences and are believed to come from the same parent population.

• 出版日期2004-11-11