IC 860

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 classified a nearby post-starburst galaxy, in early stages of transforming into its quiescent state. It is also vibrationally excited HCN luminous infrared galaxy with L_HCN -_VIB/L_IR 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. In additional, the galaxy contains HI and OH absorption towards its central region. The galaxy has an implied mass of M_SMBH of 4 x 10⁷ M_Θ based on its velocity rotation of v_rot = 226 km s⁻¹. The Eddington luminosity of IC 860 is 2 x 10¹² L_Θ.
According to low 157.7 μm-to-L_FIR 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 v_out = 170 – 200 km s⁻¹, 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⁻¹.