There have been claims that certain multicomponent broad

There have been claims that certain multicomponent broad -...

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There have been claims that certain multicomponent broad-line profiles are well fit by a central (NLR) peak plus the characteristic velocity signature of a rotating disk, complete with Doppler boosting of the blue component. The type example is Arp 102B, as shown by Halpern and Filippenko 1988 (Nature 331, 46). A fit to a detailed model was given by Chen et al. 1989 (ApJ 339, 742) in their Fig. 2 (ADS, by permission of the AAS): There are several objects with profiles of this general kind: also included are 3C 309.3 and 3C 382 (Osterbrock et al 1976 ApJ 206, 898), and 3C 332 (Halpern 1990 ApJLett 354, L1). Even the LINER NGC 1097 and the LINER and low-level Seyfert 1 nucleus in M81 show this behavior at least occasionally, especially in the UV lines. However, a disk interpretation for these profiles has both immediate and philosophical problems. There exists a large variety of BLR profiles, so that a few of the thousands of objects known will fit almost any theory. Why should only a few
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There have been claims that certain multicomponent broad -...

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