NGC 17

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NGC 17
Hubble Interacting Galaxy NGC 17 (2008-04-24).jpg
NGC 17 as seen by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Cetus
Right ascension 00h 11m 06.5s [1]
Declination −12° 06 26 [1]
Redshift 0.019617 [1]
Heliocentric radial velocity 5,881 ± 2 km/s [1]
Apparent magnitude  (V)15.3 [1]
Characteristics
Type Sc [1]
Apparent size  (V)2.2 × 0.8 [1]
Other designations
NGC 34, [1] Mrk 938, VV 850, PGC 781 [1]

NGC 17, also known as NGC 34, is a spiral galaxy in the constellation Cetus. It is the result of a merger between two disk galaxies, resulting in a recent starburst in the central regions and continuing starforming activity. The galaxy is still gas-rich, and has a single galactic nucleus. It lies 250 million light years away. It was discovered in 1886 by Frank Muller and then observed again later that year by Lewis Swift.

Contents

The central regions of NGC 17 have a spiral structure. NGC 34 central region.jpg
The central regions of NGC 17 have a spiral structure.

Due to the major merger event NGC 17 has no defined spiral arms like the Milky Way galaxy. Unlike the Milky Way, the center bar nucleus is also distorted. [2] The merger destroyed any galactic habitable zone that may have been there before the merger. [3] [4] For the Milky Way, the galactic habitable zone is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center, both of which lack hard boundaries. [3]

Number in the New General Catalogue

NGC 17 and NGC 34 were catalogued by Frank Muller and Lewis Swift, respectively, in 1886. A difference of half a degree in positioning between the two men's observations meant that when John Dreyer created the New General Catalogue he listed them as separate objects. [5] In 1900 Herbert Howe noticed the discrepancy; Dreyer included the update in the second edition of the NGC in 1910. [6]

Related Research Articles

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<span class="mw-page-title-main">Triangulum Galaxy</span> Spiral galaxy in the constellation Triangulum

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<span class="mw-page-title-main">Whirlpool Galaxy</span> Galaxy in the constellation Canes Venatici

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<span class="mw-page-title-main">NGC 4725</span> Galaxy in the constellation Coma Berenices

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<span class="mw-page-title-main">NGC 5033</span> Galaxy in the constellation Canes Venatici

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<span class="mw-page-title-main">NGC 5005</span> Galaxy in the constellation Canes Venatici

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<span class="mw-page-title-main">NGC 278</span> Galaxy in the constellation Cassiopeia

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<span class="mw-page-title-main">NGC 7537</span> Galaxy in the constellation Pisces

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<span class="mw-page-title-main">NGC 7319</span> Galaxy in the constellation Pegasus

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<span class="mw-page-title-main">NGC 4889</span> Galaxy in the constellation Coma Berenices

NGC 4889 is an E4 supergiant elliptical galaxy. It was discovered in 1785 by the British astronomer Frederick William Herschel I, who catalogued it as a bright, nebulous patch. The brightest galaxy within the northern Coma Cluster, it is located at a median distance of 94 million parsecs from Earth. At the core of the galaxy is a supermassive black hole that heats the intracluster medium through the action of friction from infalling gases and dust. The gamma ray bursts from the galaxy extend out to several million light years of the cluster.

<span class="mw-page-title-main">NGC 6118</span> Galaxy in the constellation Serpens

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<span class="mw-page-title-main">NGC 45</span> Spiral galaxy in the constellation Cetus

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<span class="mw-page-title-main">Galactic habitable zone</span> Region of a galaxy in which life might most likely develop

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<span class="mw-page-title-main">NGC 289</span> Galaxy in the constellation of Sculptor

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<span class="mw-page-title-main">NGC 1614</span> Galaxy in the constellation Eridanus

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<span class="mw-page-title-main">NGC 6810</span> Galaxy in the constellation of Pavo

NGC 6810 is a spiral galaxy approximately 87 million light-years away from Earth in the constellation of Pavo.

<span class="mw-page-title-main">NGC 4800</span> Galaxy in constellation Canes Venatici

NGC 4800 is an isolated spiral galaxy in the constellation Canes Venatici, located at a distance of 95 megalight-years from the Milky Way. It was discovered by William Herschel on April 1, 1788. The morphological classification of this galaxy is SA(rs)b, indicating a spiral galaxy with no visual bar at the nucleus (SA), an incomplete ring structure (rs), and moderately-tightly wound spiral arms (b). The galactic plane is inclined to the line of sight by an angle of 43°, and the long axis is oriented along a position angle of 25°. There is a weak bar structure at the nucleus that is visible in the infrared.

<span class="mw-page-title-main">NGC 5683</span> Galaxy in the constellation Boötes

NGC 5683 is a type S0-a lenticular galaxy with a bar located in the Boötes constellation. It is 513 million light-years away from the Solar System and has an approximate diameter of 256,000 light-years meaning it is larger compared to the Milky Way. NGC 5683 was discovered by George Johnstone Stoney on April 13, 1850.

References

  1. 1 2 3 4 5 6 7 8 9 "NASA/IPAC Extragalactic Database". Results for NGC 17. Retrieved 2006-12-07.
  2. Futurism, futurism.com, Astronomy Photo of the Day: 10/2/15 — NGC 34
  3. 1 2 Gowanlock, M. G.; Patton, D. R.; McConnell, S. M. (2011). "A Model of Habitability Within the Milky Way Galaxy". Astrobiology. 11 (9): 855–873. arXiv: 1107.1286 . Bibcode:2011AsBio..11..855G. doi:10.1089/ast.2010.0555. PMID   22059554. S2CID   851972.
  4. Choi, Charles Q. (21 August 2015). "Giant Galaxies May Be Better Cradles for Habitable Planets". Space.com . Retrieved 24 August 2015.
  5. "New General Catalog Objects: NGC 1–49". cseligman.com. Retrieved 6 January 2017.
  6. Dreyer, J.L.E. (1910). "Second Index Catalogue of Nebulæ and Clusters of Stars, containing objects found in the years 1895 to 1907; with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888–94". Memoirs of the Royal Astronomical Society. 59: 186. Bibcode:1910MmRAS..59..105D.