Talk:Active galaxy
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There was a question in the article from At18; I moved it here:
- I put infrared and radio galaxies here too, is it the right place?
Certainly better here than nowhere, work in progress ... -- looxix 18:58 Apr 18, 2003 (UTC)
- On the above point, I think Radio galaxy should have it's own article, instead of being redirected to Active galaxy, since the two terms are not interchangable. Radio galaxies are a sub-category (as are quasars, blazars, Bl Lacs, etc..). Unless there's any objections, I can begin work on a Radio Galaxy page and un-redirect once it's reached a semi-mature status. Privong 18:42, 21 Apr 2005 (UTC)
Starburst galaxies aren't active galaxies (as the definition at the top of the article shows; they're just normal galaxies with a large amount of star formation).
Starbursts should really have their own entry, but I don't have time to do it now: I've just removed the misleading comments from the active galaxy page, and tidied it up. -- mjh, some time ago
There were a couple of misleading statements about synchrotron radiation and high temperatures in the accretion disc. I think this was probably a confusion between the properties of the accretion disc and the jet that is sometimes seen; the jet is synchrotron radiation and can have a very high brightness temperature (nothing to do with actual temperature -- the temperature of the accretion disc is quite low). -- mjh May 23 2004.
- Starburst galaxies are active galaxies, they just don't have AGN. This article should be at Active galactic nuclei instead. Don't you remember all the theories on how starburst galaxies could account for AGN type galaxies? They are active, but not single sourced, and they are bright, and spectacular, like AGN galaxies. 132.205.45.110 05:46, 6 Dec 2004 (UTC)
Clarification
I'm no expert but should "An active galaxy is a galaxy where a significant fraction of the energy output is not emitted by the normal components of a galaxy: stars, dust and interstellar gas." be clarified to a numerical proportion? Or is this impossible. A comparison, to a regular galaxy if possible, might help non-experts like me understand this better. Grox 10:07, 13 Feb 2005 (UTC)
- There isn't a concrete numerical factor, but the AGN will generally outshine the host galaxy by ~1000x. Privong 18:22, 21 Apr 2005 (UTC)