Astronomy:NGC 1792

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Short description: Galaxy in the constellation Columba
NGC 1792
NGC 1792 legacy dr10.jpg
NGC 1792 with the legacy surveys
Observation data (J2000 epoch)
ConstellationColumba
Right ascension 05h 05m 14.454s[1]
Declination−37° 58′ 50.70″[1]
Redshift0.004059[2]
Helio radial velocity1,208[3]
Distance36.4 Mly (11.17 Mpc)[3]
Group or clusterNGC 1808[4]
Apparent magnitude (V)10.18[2]
Apparent magnitude (B)10.68[2]
Characteristics
TypeSA(rs)bc[5]
Mass0.54×1011[6] M☉
Mass/Light ratio3.4[6] M☉/L☉
Other designations
IRAS 05035-3802, NGC 1792, PGC 16709, MCG -6-12-004, ESO 305-6, ESO LV3050060[2]

NGC 1792 is a spiral galaxy located in the southern Columba constellation. It was discovered by Scottish astronomer James Dunlop on October 4, 1826. This galaxy is located at a distance of about 36.4 million light-years and is receding from the Milky Way with a heliocentric radial velocity of 1,208 km/s.[3] NGC 1792 is a member of the NGC 1808 cluster of galaxies.[4]

The morphological classification of this galaxy in the de Vaucouleurs system is SA(rs)bc,[5] indicating a spiral galaxy with no central bar (SA), moderately wound arms (bc), and an incomplete ring structure.[5] However, the HyperLEDA classification of SBbc suggests it does have a bar. It has a flocculent appearance with no central bulge.[7] In the B-band, the angular extend of the galaxy spans 7′.5 × 3′.1. The plane of the galaxy is inclined at an angle of 66° to the line of sight from the Earth, with the major axis being aligned along a position angle of 317°.[4]

File:NGC1792 - HST - Potw2049a.tif There is a high level of star formation along the spiral arms at distances of more than 3 kpc from the galactic core, which have led to a number of prominent H II regions. A comparable high level of star formation in the nearby NGC 1808 galaxy may indicate a recent, distant tidal interaction between the two.[8] Radio emission from the neutral hydrogen in the NGC 1792 galaxy shows a pronounced asymmetry, most likely as a result of this interaction. As the galaxy appears only slightly disturbed, this interaction mainly impacted the outer parts of the galaxy.[4]

The star formation rate in NGC 1792 is estimated to be 11.0 M☉·yr−1.[6] Soft x-ray emission has been detected, the majority of which may be coming from X-ray binaries.[9]

References

  1. ↑ 1.0 1.1 Skrutskie, Michael F. et al. (1 February 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. ↑ 2.0 2.1 2.2 2.3 "NGC 1792". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1792. 
  3. ↑ 3.0 3.1 3.2 Tully, R. Brent et al. (2016). "Cosmicflows-3". The Astronomical Journal 152 (2): 21. doi:10.3847/0004-6256/152/2/50. 50. Bibcode: 2016AJ....152...50T. 
  4. ↑ 4.0 4.1 4.2 4.3 Dahlem, M. (October 1992). "NGC 1792 : surprising radio properties.". Astronomy and Astrophysics 264: 483–488. Bibcode: 1992A&A...264..483D. 
  5. ↑ 5.0 5.1 5.2 de Vaucouleurs, G. et al. (1991). Third reference catalogue of bright galaxies. 9. New York: Springer-Verlag. 
  6. ↑ 6.0 6.1 6.2 Dahlem, M. et al. (July 2001). "A search for intergalactic H I gas in the NGC 1808 group of galaxies". Astronomy and Astrophysics 373 (2): 485–493. doi:10.1051/0004-6361:20010614. Bibcode: 2001A&A...373..485D. 
  7. ↑ Marino, A. et al. (February 2010). "Galaxy evolution in Local Group analogs. I. A GALEX study of nearby groups dominated by late-type galaxies". Astronomy and Astrophysics 511: 18. doi:10.1051/0004-6361/200913216. A29. Bibcode: 2010A&A...511A..29M. 
  8. ↑ Dahlem, M. et al. (July 2001). "A search for intergalactic H I gas in the NGC 1808 group of galaxies". Astronomy and Astrophysics 373 (2): 485–493. doi:10.1051/0004-6361:20010614. Bibcode: 2001A&A...373..485D. 
  9. ↑ Dahlem, Michael et al. (September 1994). "Soft X-Ray Observations of the Interacting Galaxies NGC 1808 and NGC 1792". Astrophysical Journal 432: 598. doi:10.1086/174598. Bibcode: 1994ApJ...432..598D. 

External links

http://www.skyfactory.org/deepskycatalogue/db_list.asp?q=(Name~contains~NGC1792)

Coordinates: Sky map 5h 14m 6.7s, −40° 2′ 48″



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