NGC 3175

NGC 3175
NGC 3175 taken by the Hubble Space Telescope[1]
Observation data (J2000[2] epoch)
ConstellationAntlia
Right ascension10h 14m 42.111s[3]
Declination−28° 52′ 19.42″[3]
Redshift0.003613[2]
Heliocentric 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, 2MASX J10144211-2852194, NGC 3175, LEDA 29892, MCG -05-24-028[2]
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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]

  1. ^ Cite error: The named reference spacetelescope was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference simbad was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Skrutskie_et_al_2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Meyer2004 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Tully_et_al_2016 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Dahlem_et_al_2001 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Dahlem_et_al_2006 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Streicher2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Seligman was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Aranda2011 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Kondapally_et_al_2018 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Mathewson_Ford_1996 was invoked but never defined (see the help page).