Astronomy:NGC 5665

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NGC 5665
Hubble Space Telescope view of NGC 5665
Observation data (J2000 epoch)
ConstellationBoötes
Right ascension 14h 32m 25.796s[1]
Declination+08° 04′ 42.43″[1]
Redshift0.007431±0.000017[2]
Helio radial velocity2,237 km/s[3]
Distance53.6 ± 7.7 Mly (16.44 ± 2.37 Mpc)[3]
Apparent magnitude (V)12.7[4]
Apparent magnitude (B)12.50[5]
Characteristics
TypeSAB(rs)c pec?[6]
Mass6×1010[5] M☉
Apparent size (V)1.653′ × 1.257′[1]
Other designations
GC 3923, IRAS F14299+0818, NGC 5665, UGC 9352, MCG+01-37-024, PGC 51953[7]

NGC 5665 is a spiral galaxy in the northern constellation of Boötes. It was discovered on January 30, 1784 by German-British astronomer William Herschel.[8] This galaxy is located at a distance of 53.6 ± 7.7 million light-years (16.44 ± 2.37 Mpc),[3] and is receding with a heliocentric radial velocity of 2,237 km/s.[3] It is cataloged in Halton Arp's Atlas of Peculiar Galaxies as object number 49.[5]

SDSS image of NGC 5665

The morphological classification of NGC 5665 is unclear and differs by author.[5] In the De Vaucouleurs system it was classified as SAB(rs)c pec?,[6] which indicates a weakly-barred spiral galaxy (SAB) with a transitional inner ring structure (rs), loosely wound spiral arms (c), and suspected peculiarities (pec?). The galactic plane is inclined at an angle of 53°±5° to the plane of the sky,[3] with the major axis aligned along a position angle of 145°.[5]

Evidence suggests that NGC 5665 underwent a gravitational interaction with another galaxy some 500 million years ago, swallowing a smaller companion.[5] It is somewhat asymmetrical in appearance,[6] retaining a single main spiral arm and the remains of several others. The galaxy is rich in dust and gas with a small bar at the center. There are numerous sites of star formation in the arm that match the age of the interaction.[5] The spectrum of the core is a blend between a LINER and an H II region.[6]

NGC 5665 is part of the Virgo-Libra Cloud,[9] which is part of the Virgo Supercluster.[10]

References

  1. ↑ 1.0 1.1 1.2 Skrutskie, Michael F. et al. (February 1, 2006), "The Two Micron All Sky Survey (2MASS)", The Astronomical Journal 131 (2): 1163–1183, doi:10.1086/498708, ISSN 0004-6256, Bibcode: 2006AJ....131.1163S. 
  2. ↑ Chengalur, Jayaram N.; Salpeter, E. E. (December 1993), "Dynamics of Binary Galaxies. I. Wide Pairs", Astrophysical Journal 419: 30, doi:10.1086/173456, Bibcode: 1993ApJ...419...30C. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Kourkchi, Ehsan et al. (October 23, 2020), "Cosmicflows-4: The Catalog of ∼10,000 Tully–Fisher Distances", The Astrophysical Journal 902 (2): 145, doi:10.3847/1538-4357/abb66b, ISSN 1538-4357, Bibcode: 2020ApJ...902..145K. 
  4. ↑ "NED results for object NGC 5665", NASA/IPAC Extragalactic Database (NASA), https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+5665&list_limit=5, retrieved 2015-10-19. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Artamonov, B. P. et al. (September 2000), "BVRI CCD photometry of the peculiar galaxies NGC 5605 and NGC 5665", Astronomy Reports 44 (9): 569–578, doi:10.1134/1.1307552, Bibcode: 2000ARep...44..569A. 
  6. ↑ 6.0 6.1 6.2 6.3 Thomas, H. C.; Dunne, L.; Clemens, M. S.; Alexander, P.; Eales, S.; Green, D. A. (February 2002), "The distribution of atomic gas and dust in nearby galaxies - I. Presentation of matched-resolution VLA H I and SCUBA 850-μm maps", Monthly Notices of the Royal Astronomical Society 329 (4): 747–758, doi:10.1046/j.1365-8711.2002.05035.x, Bibcode: 2002MNRAS.329..747T. 
  7. ↑ "NGC 5665". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+5665. 
  8. ↑ Seligman, COurtney, "NGC Objects: NGC 5650 - 5699", Celestial Atlas, https://cseligman.com/text/atlas/ngc56a.htm#5665, retrieved 2024-04-14. 
  9. ↑ Tully, R. Brent (1988). Nearby galaxies catalog. Cambridge [GB] New York New Rochelle [etc.]: Cambridge university press. ISBN 978-0-521-35299-4. 
  10. ↑ Tully, R. B. (1982-06-01). "The Local Supercluster" (in en). The Astrophysical Journal 257: 389–422. doi:10.1086/159999. ISSN 0004-637X. https://ui.adsabs.harvard.edu/abs/1982ApJ...257..389T/abstract. 

Coordinates: Sky map 14h 32m 25.99s, +08° 04′ 48.1″



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