Talk:Low-ionization nuclear emission-line region

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A fact from Low-ionization nuclear emission-line region appeared on Wikipedia's Main Page in the Did you know column on 6 January 2007. The text of the entry was as follows:

Did you know... that approximately one-third of nearby galaxies contain low-ionization nuclear emission-line regions?

A record of the entry may be seen at Wikipedia:Recent additions/2007/January.

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LINER galaxies are typically 'Ellipsoidals' (E/S0), which are typically characterized by old, red stellar populations, w/ little ongoing star-formation. 24.143.65.75 (talk) 14:58, 12 December 2011 (UTC)[reply]

Sy3

According to [1] (NASA), a LINER is a Seyfert type-3 galaxy. 70.51.9.235 (talk) 09:21, 15 July 2008 (UTC)[reply]

proto-galaxies begin as intergalactic cloud clumps, classified as "Irregulars". Then, they disk-down into flattened, "Spirals". Later, close encounters & mergers can generate disturbed systems, e.g. LIRGs, which eventually virialize into "Ellipticals". According to this article, most LINERs reside in the latter categories, i.e. in disturbed galaxies (LIRGs) and post-disturbance, (re-)virialized, galaxies (Es). 66.235.38.214 (talk) 04:12, 26 December 2012 (UTC)[reply]

LINERs are mini-AGNs ?

According to:

http://www.eso.org/sci/meetings/2011/dynamics2011/Contributions/Neumayer.pdf

some LINER emissions are generated by small AGNs, from small galactic black holes (hundreds of thousands, not millions to billions, of star masses), in the "Nuclear [Star] Clusters (NC)", which substitute for super-massive black holes (SMBH), in the centers of smaller galaxies. Three-quarters of all galaxies have NCs, instead of SMBHs, at their centers. And some of those NCs have small SMBH, generating small AGNs, producing LINERs. Inexpertly, NCs with small SMBH are transitional, between smaller NCs with no central black hole, and larger systems having SMBH instead of the entire NC. Now, according to this article, a third of all cosmically-local galaxies have LINERs. Do these statistics imply, that those third are transitional galaxies with NCs and small SMBH, which are more massive than the smallest galaxies having NCs with no central black hole; but less massive than the largest galaxies having SMBH instead of NCs? If so, then this article could be improved, with appropriate citations. 66.235.38.214 (talk) 04:04, 12 November 2012 (UTC)[reply]

According to Galaxy Formation & Evolution by Mo & van den Bosch (pg.60), the Milky Way (along with M32) has a NC and a SMBH. Now, the Milky Way's SMBH is anomalously low mass for its encompassing galactic Bulge. Inexpertly, that fact is consistent with NC with central small SMBH representing a transitional structure, intermediate between smaller & lower mass systems (NC w/o SMBH), and larger & more massive systems (SMBH w/o NC). 66.235.38.214 (talk) 08:44, 12 November 2012 (UTC)[reply]

At present epoch, the masses of central SMBH within galaxies generally scale with the total mass of the surrounding star halo. However, some SMBH are less massive than the trend would predict; but none are more massive. Perhaps, at present epoch, those galaxies whose central SMBH are under-massive are "split systems", having a NC & small SMBH, whose total combined mass (NC + SMBH) would be about what the trend would predict? Cp. http://hubblesite.org/explore_astronomy/skywatch/db/220/images/large.jpg 66.235.38.214 (talk) 09:10, 12 November 2012 (UTC)[reply]

Transition objects

Some discussion of transition objects may be useful. Praemonitus (talk) 22:44, 6 July 2013 (UTC)[reply]

I agree! If you propose some text, I'll try to help you edit it. - Parejkoj (talk) 22:47, 7 July 2013 (UTC)[reply]