NGC 7727
| NGC 7727 | |
|---|---|
 NGC 7727 by HST | |
| Observation data (J2000 epoch) | |
| Constellation | Aquarius |
| Right ascension | 23h 39.9m [1] |
| Declination | −12° 17′ 34″[1] |
| Apparent magnitude (V) | 11.5[1] |
| Characteristics | |
| Type | SAB(s)a pec[1] |
| Apparent size (V) | 4.7′ × 3.5′[1] |
| Other designations | |
| PGC 72060, Arp 222 | |
NGC 7727 is a peculiar galaxy in the constellation Aquarius.
Features
This object is located at a distance of 23.3 megaparsecs (76 million light years) of the Milky Way[1] and has a peculiar aspect, with several plumes and streams of irregular shape that explains its inclusion on Halton C. Arp's Atlas of Peculiar Galaxies with the number 222, being classified as a "Galaxy with amorphous spiral arms".
In all likelihood, this system is the product of the merger of two previous spiral galaxies that took place 1 billion years ago,[2] with the aforementioned stellar plumes and streams being the remnants of the disks of the two galaxies that collided to form this object.
Two starlike objects can be seen in NGC 7727's center, at least one of them likely being the former core of one of those two spiral galaxies.[3] In addition to this, 23 objects--candidates to be young globular clusters formed in the collision--can be found in this system.[2]
NGC 7727 is very similar to NGC 7252, another galaxy product of the collision and merging of two former spiral galaxies, in the same constellation. However it has far less gas (neutral hydrogen and molecular hydrogen) than the latter.[4]
NGC 7727's most likely fate is to become an elliptical galaxy in the future, with very little interstellar dust and star formation[5]
References
- ^ a b c d e f "NASA/IPAC Extragalactic Database". Results for NGC 7727. Retrieved 2013-12-21.
- ^ a b Crabtree, D. R.; Smecker-Hane, T. (December 1994). "Young Star Clusters and CO Gas in the Galaxy Merger, NGC 7727 (Arp 222)". Bulletin of the American Astronomical Society. 26: 1499. Bibcode:1994AAS...18510714C.
- ^ Notes for Object NGC 7727 (NED)
- ^ Georgakakis, A.; Forbes, D. A.; Norris, R. P. (October 2000). "Cold gas and star formation in a merging galaxy sequence". Monthly Notices of the Royal Astronomical Society. 318 (1): 124–138. arXiv:astro-ph/0006084. Bibcode:2000MNRAS.318..124G. doi:10.1046/j.1365-8711.2000.03709.x.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ NGC 7727 - Clash of the Titans
External links
Media related to NGC 7727 at Wikimedia Commons
