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IC 860

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Galaxy in the constellation of Coma Berenices
IC 860
SDSS image of IC 860
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension13 15 03.50
Declination+24° 37′ 07.79″
Redshift0.012909
Heliocentric radial velocity3,870 km/s
Distance155 Mly (47.52 Mpc)
Apparent magnitude (V)0.044
Apparent magnitude (B)0.057
Characteristics
TypeSa, HII;LIRG
Size35,000 ly
Apparent size (V)0.5' x 0.3'
Notable featuresluminous infrared galaxy
Other designations
CGCG 130-023, IRAS 13126+2452, ECO 03976, MCG +04-31-015, PGC 46086

IC 860 is a barred spiral galaxy in the constellation of Coma Berenices. It is located 155 million light years away from Earth. It was discovered on June 16, 1892, by Stephan Javelle, a French astronomer. It is a peculiar galaxy.

IC 860 is classfied a nearby post-starburst galaxy, in early stages of transforming into its quiescent state. It is also vibrationally excited HCN luminous infrared galaxy (LIRG) with LHCN -VIB/LIR of 3.2 x 10. It has a dust obscured nucleus making it hard to determine whether it is a starburst galaxy or an active galactic nucleus (AGN). In additional, the galaxy contains HI and OH absorption towards its central region. The galaxy has an implied mass of MSMBH of 4 x 10 MΘ based on its velocity rotation of vrot = 226 km s. The Eddington luminosity of IC 860 is 2 x 10 LΘ.

According to low 157.7 μm-to-LFIR ratios and by a mid-infrared silicate absorption, the findings suggest IC 860 does have a warm compact region. The region of the galaxy, is in a current phase of rapid evolution where inflows are accumulating column densities of interstellar dust and gas, sufficient to fuel its star formation or its AGN.

IC 860 was also observed in optical imaging. From the results, the galaxy has a massive V-shaped kiloparsec dust structure. As the nuclear gas only has an outflow velocity of vout = 170 – 200 km s, this makes it impossible to escape from the galaxy unless being accelerated.

In another study, IC 860 contains 4.83 GHz formaldehyde emission with a peak flux density of 2.0-2.2 mJy based from observations made by Arecibo Observatory. It is found to have three unique emission compartments centered between 3830 and 3990 km s.

References

  1. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 21 September 2024.
  2. "Index Catalog Objects: IC 850 - 899". cseligman.com. Retrieved 21 September 2024.
  3. Kazes, I.; Karoji, H.; Sofue, Y.; Nakai, N.; Handa, T. (1988-05-01). "A most peculiar galaxy : IC 860". Astronomy and Astrophysics. 197: L22 – L24. Bibcode:1988A&A...197L..22K. ISSN 0004-6361.
  4. Luo, Yuanze; Rowlands, Kate; Alatalo, Katherine; Sazonova, Elizaveta; Abdurro'uf; Heckman, Timothy; Medling, Anne M.; Deustua, Susana E.; Nyland, Kristina; Lanz, Lauranne; Petric, Andreea O.; Otter, Justin A.; Aalto, Susanne; Dimassimo, Sabrina; French, K. Decker (2022-10-01). "A Multiwavelength View of IC 860: What Is in Action inside Quenching Galaxies". The Astrophysical Journal. 938 (1): 63. arXiv:2208.08379. Bibcode:2022ApJ...938...63L. doi:10.3847/1538-4357/ac8b7d. ISSN 0004-637X.
  5. Gorski, M. D.; Aalto, S.; König, S.; Wethers, C.; Yang, C.; Muller, S.; Viti, S.; Black, J. H.; Onishi, K.; Sato, M. (February 2023). "The opaque heart of the galaxy IC 860: Analogous protostellar, kinematics, morphology, and chemistry". Astronomy & Astrophysics. 670: A70. arXiv:2210.04499. Bibcode:2023A&A...670A..70G. doi:10.1051/0004-6361/202245166. ISSN 0004-6361.
  6. ^ Aalto, S.; Muller, S.; König, S.; Falstad, N.; Mangum, J.; Sakamoto, K.; Privon, G. C.; Gallagher, J.; Combes, F.; García-Burillo, S.; Martín, S.; Viti, S.; van der Werf, P.; Evans, A. S.; Black, J. H. (July 2019). "The hidden heart of the luminous infrared galaxy IC 860". Astronomy & Astrophysics. 627: A147. arXiv:1905.07275. doi:10.1051/0004-6361/201935480. ISSN 0004-6361.
  7. Baan, Willem A.; An, Tao; Klöckner, Hans-Rainer; Thomasson, Peter (2017-04-17). "The emission structure of formaldehyde megamasers". Monthly Notices of the Royal Astronomical Society. 469 (1): 916–929. arXiv:1704.07337. doi:10.1093/mnras/stx895. ISSN 0035-8711.
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