Author Topic: Mergers or flybys with incredibly long tails  (Read 17992 times)

zutopian

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Re: Mergers or flybys with incredibly long tails
« Reply #120 on: June 10, 2014, 08:27:43 am »
NGC 6872: Largest known spiral


This composite of the giant barred spiral galaxy NGC 6872 combines visible light images from the European Southern Observatory's Very Large Telescope with far-ultraviolet data from NASA's GALEX and 3.6-micron infrared data acquired by NASA's Spitzer Space Telescope.
Credit: NASA's Goddard Space Flight Center/ESO/JPL-Caltech/DSS


« Last Edit: June 29, 2014, 03:58:51 pm by zutopian »

zutopian

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Re: Mergers or flybys with incredibly long tails
« Reply #121 on: June 29, 2014, 09:07:31 am »
The symmetries and scaling of tidal tails in galaxies
Curtis Struck (Iowa State), Beverly J. Smith (East Tennessee State)
Quote
6.1 Long, straight tails
(...)
Figure 18
Top row     : Examples of Arp galaxies with long straight symmetric tails.          Left to right: Arp 64, 65, and 99.
Bottom row: Examples of Arp galaxies with long, straight, but asymmetric tails. Left to right: Arp 100, 101, and 102.

6.2 Long, somewhat curved tails
(...)
Figure 19.
Top row     : Examples of Arp galaxies with long but somewhat curved tails. Left to right: Arp 33, 173, and 174.
Bottom row: Examples of Arp galaxies with long very curved tails.               Left to right: Arp 58, 72, and 82.

6.3 Long curved tails
(...)
Figure 20.
Examples of Arp galaxies with short symmetric tails. Left to right: Arp 31, 285, 286.
(Submitted on 23 Feb 2012)
http://arxiv.org/abs/1202.5280

Curiously, Arp 248 isn't mentioned in the paper!
« Last Edit: June 29, 2014, 10:11:16 am by zutopian »

planetaryscience

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Re: Mergers or flybys with incredibly long tails
« Reply #122 on: June 29, 2014, 02:23:53 pm »
NGC 6872: Largest known spiral

This is off topic, but may I note that the lesser-known spiral NGC 262 is actually the largest. While NGC 6872 has a diameter of 522,000 light years, NGC 262 has a diameter of 2,600,000 light years.
I like to find asteroids and galaxy mergers- but all galaxies are still fine to me.

zutopian

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Re: Mergers or flybys with incredibly long tails
« Reply #123 on: June 29, 2014, 03:19:03 pm »
You are right! In the wikipedia article about NGC 262 is stated following.: 

Quote
NGC 6872 (...) was mistakenly claimed in 2013 as the largest spiral galaxy.
https://en.wikipedia.org/wiki/NGC_262