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Post Info TOPIC: NGC 7492


L

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RE: NGC 7492
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Title: The discovery of tidal tails around the globular cluster NGC 7492 with Pan-STARRS1
Author: Camila Navarrete, Vasily Belokurov, Sergey E. Koposov

We report the discovery of tidal tails around the Galactic globular cluster NGC 7492, based on the Data Release 1 of the Pan-STARRS 1 survey. The tails were detected with a version of the matched filter technique applied to the (g-r,r) and (g-i,i) colour-magnitude diagrams. Tidal tails emerging from the cluster extend at least ~3.5 degrees in the North-East to South-East direction, equivalent to ~1.5 kpc in projected length.

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NGC 7492 (also GCl 125) is a magnitude +11.2 globular cluster located 82,500 light-years away in the constellation Aquarius.

The distance makes it difficult to resolve into stars, the brightest of them are of visual mag 15.5 so a 250mm telescope is required to observe visually.

The globular cluster was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Windsor Road, Slough, on the 20th September 1786 and catalogued as H III.558.

RA 23h 08m 26.68s, Dec -15 36' 41.3"



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