Journal article
Clues from microquasars to the origin of radio-loudness of quasars
- Abstract:
- We analysed the long-term variability of four microquasars (GRS 1915+105, Cyg X-1, Cyg X-3, and Sco X-1) in radio and X rays. The results of our analysis indicate the existence of two distinct modes of energy output, which we refer to as the `coupled' mode and the `flaring' mode. The coupled mode is responsible for mildly fluctuating, flat-spectrum radio emission, coupled with the X-ray emission; the flaring mode produces powerful, steep-spectrum radio flares, with no significant counterpart in X rays. We find that the fraction of time spent by a typical microquasar in the flaring mode is similar to the fraction of quasars that are radio-loud. This is consistent with the hypothesis that radio-loudness of quasars is a function of the epoch at which the source is observed.
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Authors
- Journal:
- PoSMQW More from this journal
- Volume:
- 6
- Pages:
- 087
- Publication date:
- 2006-11-06
- ISSN:
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1313-8502
- Language:
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English
- Keywords:
- Pubs id:
-
pubs:165036
- UUID:
-
uuid:1030e0a7-bfbf-4aca-bc68-e18a05535932
- Local pid:
-
pubs:165036
- Source identifiers:
-
165036
- Deposit date:
-
2012-12-19
- ARK identifier:
Terms of use
- Copyright date:
- 2006
- Notes:
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5 pages, 2 figures. Accepted for publication in the proceedings of
the "VI Microquasar Workshop: Microquasars and Beyond" (September 18-22, 2006
Como, Italy). Available from pos.sissa.it
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