2.1 Working Definitions
The following definitions have been in wide use, and are adopted for the purpose of this debate:
|ULIG:||Lir 1012 L (1)|
|``warm'':||f25 / f60 > 0.2 (as originally defined by de Grijp et al. 1985; also Low et al. 1998, Sanders et al. 1988b)|
|AGN:||A compact nuclear region producing energy by non-stellar processes. Also, a strong ``broad-line region" (BLR) with doppler motions > 2000 km s-1 (HWHM) from gas in a region < 1 pc in diameter.|
|RQQSO:||radio-quiet quasi-stellar object (L20cm / L1µm 10-5)|
1 Lir 1012 L is equivalent to the minimum bolometric luminosity of a QSO, i.e. MB -22.3 - which is equivalent to MB < -23 (Schmidt & Green 1983) corrected for H0 = 75 km s-1 Mpc-1, q0 = 0 - and a bolometric correction for QSOs of ~ 11.8 x L (0.43 µm) (e.g. Elvis et al. 1994; see also Sanders & Mirabel 1996).