We discuss the origin of the " dusty lukewarm absorber " , which we previously identified in the reddened Seyfert 1 galaxies NGC 3227 and Akn 564. This absorber is characterized by saturated UV absorption lines (C IV, N V) near the systemic velocity of the host galaxy, and is likely responsible for reddening both the continuum and the emission lines (including those from the narrow-line region)...

We calculate the Euclidean actions and the entropies of lukewarm black holes, cold black holes and ultracold solutions in the Einstein-Maxwell theory with a positive cosmological constant. We find that the entropy of lukewarm black holes is sum of entropies of black hole horizon and cosmological horizon. The entropy of cold black holes is only one quarter area of cosmological horizon, and the e...