IC 860

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IC 860
IC860 - SDSS DR14.jpg
SDSS image of IC 860
Observation data (J2000 epoch)
Constellation Coma Berenices
Right ascension 13h 15m 03.50s
Declination +24° 37′ 07.79″
Redshift 0.012909
Heliocentric radial velocity 3,870 km/s
Distance 155 Mly (47.52 Mpc)
Apparent magnitude  (V)0.044
Apparent magnitude  (B)0.057
Characteristics
Type Sa, HII;LIRG
Size35,000 ly
Apparent size  (V)0.5' x 0.3'
Notable features luminous 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. [1] It was discovered on June 16, 1892, by Stephan Javelle, a French astronomer. [2] It is a peculiar galaxy. [3]

IC 860 is classfied a nearby post-starburst galaxy, in early stages of transforming into its quiescent state. [4] It is also vibrationally excited HCN luminous infrared galaxy (LIRG) with LHCN -VIB/LIR of 3.2 x 10−8. It has a dust obscured nucleus making it hard to determine whether it is a starburst galaxy or an active galactic nucleus (AGN). [5] In additional, the galaxy contains HI and OH absorption towards its central region. The galaxy has an implied mass of MSMBH of 4 x 107 MΘ based on its velocity rotation of vrot = 226 km s−1. The Eddington luminosity of IC 860 is 2 x 1012 LΘ. [6]

According to low [C II] 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. [6]

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−1, this makes it impossible to escape from the galaxy unless being accelerated. [6]

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−1. [7]

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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. 1 2 3 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. 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. doi: 10.1093/mnras/stx895 . ISSN   0035-8711.
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