Astronomy:NGC 3175

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Short description: Galaxy in the constellation Antlia
NGC 3175
File:NGC3175 - Potw1949a.tif
NGC 3175 taken by the Hubble Space Telescope[1]
Observation data (J2000[2] epoch)
ConstellationAntlia
Right ascension 10h 14m 42.111s[3]
Declination−28° 52′ 19.42″[3]
Redshift0.003613[2]
Helio radial velocity1,081.1 km/s[4]
Distance53.9 Mly (16.52 Mpc)[5]
Group or clusterNGC 3175 group[6]
Apparent magnitude (B)12.08[5]
Characteristics
TypeSAB(s)b[7]
Mass(7.34±0.85)×1010[6] M☉
Mass/Light ratio7.13+1.78
−1.98[6] M☉/L☉
Apparent size (V)5′.0 × 1′.3[8]
Other designations
IRAS 1012-286P13, NGC 3175, MCG-05-24-028[2]

NGC 3175 is a spiral galaxy located in the far eastern part of the southern constellation of Antlia[8] at an approximate distance of 54 million light-years.[5] NGC 3175 was discovered on March 30, 1835 by English astronomer John Herschel,[9] whose notes described it as, "considerably bright, large, much extended NE-SW, very gradually little brighter middle".[10] This galaxy is the namesake of the NGC 3175 group of galaxies,[6] which includes the spiral galaxy NGC 3137.[11]

The morphological classification of this galaxy is SAB(s)b,[7] which indicates a weakly-barred spiral galaxy (SAB) with no inner ring structure (s), and somewhat tightly wound spiral arms (b). It spans an angular size of 5′.0 × 1′.3,[8] with the major axis aligned along a position angle of 56°. The plane of the galaxy is inclined at an angle of 77° to the line of sight from the Earth,[12] and thus is being viewed close to edge on.

A study of the galaxy using the Australia Telescope Compact Array found that the outer disk of this galaxy, beyond a radius of 3.5 kpc from the core, is free of neutral hydrogen emission. This is an indication that no star formation is occurring, which is peculiar for a spiral galaxy. In contrast, the central region is undergoing star formation and contains 5.8×108 M☉ of neutral hydrogen. There are no nearby galaxies that could explain the stripping of hydrogen gas from the outer part of the galaxy.[6]

See also

References

  1. ↑ "Galactic Diversity" (in en). https://www.spacetelescope.org/images/potw1949a/. 
  2. ↑ 2.0 2.1 2.2 "NGC 3175". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3175. 
  3. ↑ 3.0 3.1 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. 
  4. ↑ Meyer, M. J. et al. (June 2004). "The HIPASS catalogue - I. Data presentation". Monthly Notices of the Royal Astronomical Society 350 (4): 1195–1209. doi:10.1111/j.1365-2966.2004.07710.x. Bibcode: 2004MNRAS.350.1195M. 
  5. ↑ 5.0 5.1 5.2 Tully, R. Brent et al. (August 2016). "Cosmicflows-3". The Astronomical Journal 152 (2): 21. doi:10.3847/0004-6256/152/2/50. 50. Bibcode: 2016AJ....152...50T. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 Dahlem, M. et al. (May 2001). "The mysterious H I deficiency of NGC 3175". Astronomy and Astrophysics 371: 45–51. doi:10.1051/0004-6361:20010313. Bibcode: 2001A&A...371...45D. 
  7. ↑ 7.0 7.1 Dahlem, M. et al. (October 2006). "Dependence of radio halo properties on star formation activity and galaxy mass". Astronomy and Astrophysics 457 (1): 121–131. doi:10.1051/0004-6361:20054787. Bibcode: 2006A&A...457..121D. 
  8. ↑ 8.0 8.1 8.2 Streicher, Magda (June 2010). "Antlia, the Machine Pneumatique". Monthly Notes of the Astronomical Society of South Africa 69 (5 and 6): 107–112. Bibcode: 2010MNSSA..69..107S. 
  9. ↑ Seligman, C.. "NGC 3175 (= PGC 29892 = PGC 736480)". Celestial Atlas. https://cseligman.com/text/atlas/ngc31a.htm#3175. 
  10. ↑ Aranda, Ted (November 25, 2011). 3,000 Deep-Sky Objects, An Annotated Catalogue. Springer New York. p. 221. ISBN 9781441994196. https://books.google.com/books?id=gc9oXfN3xYAC&pg=PA221. 
  11. ↑ Kondapally, Rohit; Russell, George A.; Conselice, Christopher J.; Penny, Samantha J. (December 2018). "Faint satellite population of the NGC-3175 Group - a Local Group analogue". Monthly Notices of the Royal Astronomical Society 481 (2): 1759–1773. doi:10.1093/mnras/sty2333. Bibcode: 2018MNRAS.481.1759K. 
  12. ↑ Mathewson, D. S.; Ford, V. L. (November 1996). "Parameters of 2447 Southern Spiral Galaxies for Use in the Tully-Fisher Relation". Astrophysical Journal Supplement 107: 97. doi:10.1086/192356. Bibcode: 1996ApJS..107...97M. 

External links

Coordinates: Sky map 10h 14m 42.111s, -28° 52′ 19.42″



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