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Post Info TOPIC: NGC 5523
Blobrana


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Posts: 131433
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PGC 50895
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Title: NGC 5523: An Isolated Product of Soft Galaxy Mergers?
Author: Leah M. Fulmer, John S. Gallagher III, Ralf Kotulla

Multi-band images of the very isolated spiral galaxy NGC 5523 show a number of unusual features consistent with NGC 5523 having experienced a significant merger: (1) Near-infrared (NIR) images from the Spitzer Space Telescope (SST) and the WIYN 3.5-m telescope reveal a nucleated bulge-like structure embedded in a spiral disk. (2) The bulge is offset by ~1.8 kpc from a brightness minimum at the center of the optically bright inner disk. (3) A tidal stream, possibly associated with an ongoing satellite interaction, extends from the nucleated bulge along the disk. We interpret these properties as the results of one or more non-disruptive mergers between NGC 5523 and companion galaxies or satellites, raising the possibility that some galaxies become isolated because they have merged with former companions.

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Blobrana


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Posts: 131433
Date:
NGC 5523
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NGC 5523 (also IRAS 14125 + 2533, MCG 4-34-8, UGC 9119 and PGC 50895) is a magnitude +12.9 edge-on spiral galaxy located 48 million light-years away in the constellation Bootes.
It forms an almost equilateral triangle with the galaxies NGC 5466 and NGC 5641

The galaxy was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Datchet, Berkshire, on the 19th May 1784.

Right ascension 14h 14m 51.4s, Declination +25° 19' 06"



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