UGC 1840 explained

UGC 1840
Constellation Name:Andromeda
Z:0.018096
Dist Ly:258.5 Mly (79.1 Mpc)
Type:Peculiar
Notes:Collisional ring galaxy
Epoch:J2000
Ra:[1]
H Radial V:5,420 km/s
Size:~40.2kpc (estimated)
Names:, HFLLZOA F264, V Zw 229

UGC 1840, also known as Arp 145, are a pair of interacting galaxies located 250 million light-years away from the Solar System in the Andromeda constellation.[2] The earliest known reference to the pair of galaxies is in part 2 of the Morphological Catalogue of Galaxies, published in 1964, where it is listed as MCG +07-06-002.[3]

Made up of two galaxies, UGC 1840 NED01 (PGC 9060)[4] and UGC 1840 NED02 (PGC 9062),[5] the two galaxies had recently collided with each other[6] in which the elliptical galaxy has penetrated through the spiral galaxy's nucleus leaving a hole in its middle, thus forming a ring galaxy.[7] [8] With a diameter of 1.3 arc minutes, close to 100,000 thousand light-years, they are roughly the same size as the Milky Way.[9]

Both galaxies are listed as Arp145 in the Atlas of Peculiar Galaxies which was created by Halton Arp.[10] [11] They fall under the category of objects that have emanating material and both classified as galaxies that have ring systems.

References

  1. Web site: Results for object NGC UGC 1840 (UGC 1840). NASA/IPAC Extragalactic Database. California Institute of Technology. 2024-11-13.
  2. Web site: Your NED Search Results . 2024-04-22 . ned.ipac.caltech.edu.
  3. 1964MCG...C02....0V. Morphological catalogue of galaxies. Part 2. Vorontsov-Vel'Yaminov. B. A.. Arkhipova. V. P.. Morphological Catalogue of Galaxies. 1964. C02.
  4. Web site: NED Search Results for UGC 1840 NED02 . 2024-04-22 . ned.ipac.caltech.edu.
  5. Web site: NED Search Results for UGC 1840 NED01 . 2024-04-22 . ned.ipac.caltech.edu.
  6. Web site: Collisional Ring Galaxies - P.N. Appleton & C. Struck-Marcell . 2024-04-22 . ned.ipac.caltech.edu.
  7. Web site: Mantrap Skies Astronomical Image Catalog: ARP145 . 2024-04-22 . images.mantrapskies.com.
  8. Chatterjee . T. K. . 1984-11-01 . The Formation of Ring Galaxies . Astrophysics and Space Science . 106 . 2 . 309–339 . 10.1007/BF00650358 . 1984Ap&SS.106..309C . 0004-640X.
  9. Web site: Iovene . Salvatore . UGC1840 (Arp 145) Irregular galaxy . 2024-04-22 . AstroBin . en.
  10. Web site: David's Astronomy - ARP Peculiar Galaxy Objects . 2024-04-22 . www.astro-richweb.net.
  11. 1966ApJS...14....1A . Atlas of Peculiar Galaxies . Arp . Halton . The Astrophysical Journal Supplement Series . 1966 . 14 . 1 . 10.1086/190147 .

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