A0136-0801

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Wikipedia

A0136-0801
The polar ring galaxy A0136-0801
Observation data (J2000 epoch)
ConstellationCetus
Right ascension01h 38m 55.23s[1]
Declination−07° 45′ 55.64″[1]
Redshift0.018439[1]
Heliocentric radial velocity5,528 km/s ± 14[1]
Distance249 Mly
Apparent magnitude (B)15.62
Characteristics
TypePolar ring[1]
Size~59,800 ly (18.32 kpc) (estimated)[1]
Other designations
PRC A-01, 6dF J0138552-074556, PGC 6101, NSA 130130, 2MASX J01385522-0745553, NPM1G -08.0057[1]

A0136-0801 known as Anon 0136-0801 is a lenticular galaxy located in the constellation of Cetus. The redshift of the galaxy is (z) 0.018[1] and it was first discovered by astronomers in 1983 who classified it as a spindle galaxy.[2] It is also categorized as a polar ring galaxy.[3][4]

Description

A0136-0801 is classified as a spindle-shaped lenticular galaxy viewed nearly edge-on, with a dominant component being the central spheroid.[2][3] It is known to display a polar ring structure that extends three times the radius of the central host galaxy. The light of the surface brightness profile is found to be associated with the host galaxy by 10 arcseconds from the galactic center, while a ring component extends outwards for about 40 arcseconds. The polar ring is less luminous when compared to the host.[5] There is also a structure appearing as disk-like along the host galaxy's major axis. Optical R-band imaging has found two arms present in the polar ring structure.[3] This ring appears to be both stable and old.[6]

Studies also found A0136-0801 has H I regions. Most of the H I emission is within the ring region and the outer contours that appear to warp away from the pole positions. The estimated mass of the H I content is estimated to be 1.6 x 109 Mʘ.[5] The halo of the galaxy is estimated to have a flat rotation curve above the galactic disk plane, suggesting dark mass is being flattened.[7] Neutral hydrogen has also been detected, with a mass of around 8.3 x 108 Mʘ.[8]

The galaxy also appears to be isolated, since no companions have been detected nearby and the closest galaxy PGC 6186 is located 18 arcmin away from it, with their redshifts differing by around 31 kilometers per seconds.[9][4][3][6]

References

  1. 1 2 3 4 5 6 7 8 "NED Search results for A0136-0801". NASA/IPAC Extragalactic Database. Retrieved 2026-01-02.
  2. 1 2 Schweizer, F.; Whitmore, B. C.; Rubin, V. C. (July 1983). "Colliding and merging galaxies. II. SO galaxies with polar rings". The Astronomical Journal. 88: 909–925. Bibcode:1983AJ.....88..909S. doi:10.1086/113377. ISSN 0004-6256.
  3. 1 2 3 4 Spavone, M.; Iodice, E.; Arnaboldi, M. (June 2015). "Surface photometry and metallicity of the polar ring galaxy A0136-0801". Monthly Notices of the Royal Astronomical Society. 450 (1): 998–1011. arXiv:1504.01710. doi:10.1093/mnras/stv647. ISSN 0035-8711.
  4. 1 2 Galletta, G.; Sage, L. J.; Sparke, L. S. (February 1997). "Molecular gas in polar-ring galaxies". Monthly Notices of the Royal Astronomical Society. 284 (3): 773–784. Bibcode:1997MNRAS.284..773G. doi:10.1093/mnras/284.3.773. ISSN 0035-8711.
  5. 1 2 Iodice, E.; Arnaboldi, M.; Sparke, L. S.; Gallagher, J. S.; Freeman, K. C. (2002-06-04). "Near-Infrared photometry in the J, H and Kn bands for Polar Ring Galaxies: I. Data, structural parameters". Astronomy & Astrophysics. 391: 103–115. arXiv:astro-ph/0206055. doi:10.1051/0004-6361:20020738.
  6. 1 2 van Driel, W.; Arnaboldi, M.; Combes, F.; Sparke, L. S. (February 2000). "A neutral hydrogen survey of polar ring galaxies. III. Nançay observations and comparison with published data" (PDF). Astronomy and Astrophysics Supplement Series. 141 (3): 385–408. Bibcode:2000A&AS..141..385V. doi:10.1051/aas:2000321. ISSN 0365-0138.
  7. ↑ Sackett, Penny D.; Pogge, Richard W. (1994-12-05). "Another flattened dark halo: Polar ring galaxy A0136−0801". AIP Conference Proceedings. 336: 141–144. arXiv:astro-ph/9412011. doi:10.1063/1.48388.
  8. ↑ van Gorkom, J. H.; Schechter, Paul L.; Kristian, Jerome (March 1987). "H i Maps of S0 Galaxies with Polar Rings". The Astrophysical Journal. 314: 457. Bibcode:1987ApJ...314..457V. doi:10.1086/165078. ISSN 0004-637X.
  9. ↑ Richter, O.-G.; Sackett, P. D.; Sparke, L. S. (January 1994). "A Neutral Hydrogen Survey of Polar-Ring Galaxies. I. Green Bank Observations of the Northern Sample". The Astronomical Journal. 107: 99. arXiv:astro-ph/9308023. Bibcode:1994AJ....107...99R. doi:10.1086/116837. ISSN 0004-6256.