NGC 5135

Source: Wikipedia, the free encyclopedia.
194 Mly[1]
Apparent magnitude (V)12.9
Characteristics
TypeSB(l)ab [1]
Apparent size (V)2.6′ × 1.8′[1]
Notable featuresSeyfert galaxy
Other designations
ESO 444-G032, MCG -05-32-013, PGC 46974[1]

NGC 5135 is a

light years from Earth. It was discovered by John Herschel on May 8, 1834.[2] It is a Seyfert galaxy.[1]

Characteristics

NGC 5135 has well defined spiral arms and is considered a grand design spiral galaxy. There is star formation along the leading edges of the arms.[3] There are dust lanes along the bar that curve towards the centre of galaxy.[4] Spiral arms become less well structured in the central regions.[3]

Near infrared image of the central region of NGC 5135 by Hubble Space Telescope.

NGC 5135 is a bright source in infrared light and with total infrared luminosity of 1011.16−1011.23 L☉ is considered a luminous infrared galaxy.[5][6] Also strong ultraviolet emission was detected in the central 2 arcseconds of the galaxy, with a dozen of prominent knots, indicative of a recent starburst.[7] The total star formation rate in the galaxy is estimated to be 15.61 ± 1.87 M☉ per year.[6] Knots of gas measuring 45–180 parsecs across are detected along the inner spiral arms in CO(6-5) imaging and some of them are associated with starburst regions.[8]

The nucleus of NGC 5135 has been found to be active and it has been categorised as a type II Seyfert galaxy.[9] The most accepted theory for the energy source of active galactic nuclei is the presence of an accretion disk around a supermassive black hole. The mass of the black hole in the centre of NGC 5135 is estimated to be 107.29 (19 million) M☉.[10]

The active nucleus is obscured in X-rays by Compton-thick material with a column density of 6.7+16.6
−2.8×1024/cm2.[11] An ionization cone has been detected in [Si vi] emission that extends for 600 parsec from the nucleus. To the ionization of the gas apart from the active nucleus also contribute supernova remnant shocks and young stars.[12]

One supernova has been observed in NGC 5135: SN 2023dpj (type II, mag. 17).[13]

Nearby galaxies

NGC 5135 belongs to a galaxy group known as LGG 351 or NGC 5135 group. Other members of the group include ESO 444- 12, NGC 5124, IC 4248, NGC 5150, NGC 5152, NGC 5153, IC 4275, NGC 5182, ESO 444- 47, ESO 444- 15, ESO 444- 21 and IC 4251,[14] along with NGC 5126. IC 4248, which lies 13.5 arcminutes from NGC 5135 and form a pair,[15] looks distorted and asymmetrical.[16]

See also

References

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 5135. Retrieved 2023-05-06.
  2. ^ Seligman, Courtney. "NGC 5135". Celestial Atlas. Retrieved 19 November 2018.
  3. ^
    doi:10.1086/367817
    .
  4. ^ Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  5. S2CID 14825701
    .
  6. ^
    doi:10.1093/mnras/stw577
    .
  7. S2CID 119098033
    .
  8. doi:10.3847/1538-4357/aae1f4
    .
  9. S2CID 16284435
    .
  10. S2CID 38183296
    .
  11. doi:10.3847/1538-4357/ab94b1
    .
  12. S2CID 15278691
    .
  13. ^ Transient Name Server entry for SN 2023dpj. Retrieved 25 October 2023.
  14. ISSN 0365-0138
    .
  15. Bibcode:1976RC2...C......0D
    .
  16. hdl:1885/266365
    .

External links

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