HI content and star formation in the interacting galaxy Arp86

Abstract

We present the results of Giant Metrewave Radio Telescope (GMRT) observations of the interacting system Arp86 in both neutral atomic hydrogen, HI, and in radio continuum at 240, 606 and 1394 MHz. In addition to HI emission from the two dominant galaxies, NGC7752 and NGC7753, these observations show a complex distribution of HI tails and bridges due to tidal interactions. The regions of highest column density appear related to the recent sites of intense star formation. HI column densities $\sim 1-$1.5 $\times 10^{21}$ cm${}^{-2}$ have been detected in the tidal bridge which is bright in Spitzer image as well. We also detect HI emission from the galaxy 2MASX J23470758+2926531, which is shown to be a part of this system. We discuss the possibility that this could be a tidal dwarf galaxy. The radio continuum observations show evidence of a non-thermal bridge between NGC7752 and NGC7753, and a radio source in the nuclear region of NGC7753 consistent with it having a LINER nucleus.

accepted for publication in MNRAS

References in corpus (17)

• Star Formation in NGC5194 (M51a): The Panchromatic View from GALEX to Spitzer
• The Parkes HI Survey of the Magellanic System
• Minor Galaxy Interactions: Star Formation Rates and Galaxy Properties
• The Spitzer Spirals, Bridges, and Tails Interacting Galaxy Survey: Interaction-Induced Star Formation in the Mid-Infrared
• HST morphologies of local Lyman break galaxy analogs I: Evidence for starbursts triggered by merging
• AEGIS: Enhancement of Dust-enshrouded Star Formation in Close Galaxy Pairs and Merging Galaxies up to z ~ 1
• The Magellanic Bridge: The Nearest Purely Tidal Stellar Population
• Intergalactic HII Regions Discovered in SINGG
• UV Morphology and Star Formation in the Tidal Tails of NGC 4038/39
• Star-formation in the HI bridge between M81 and M82
• UV Emission from Stellar Populations within Tidal Tails: Catching the Youngest Galaxies in Formation?
• The Chemical Uniformity of High z DLA Protogalaxies
• The Unusual Tidal Dwarf Candidate in the Merger System NGC 3227/6: Star Formation in a Tidal Shock?
• An HI Threshold for Star Cluster Formation in Tidal Debris
• GMRT Observations of the Group Holmberg 124: Evolution by Tidal Forces and Ram Pressure ?
• A radio study of the superwind galaxy NGC1482
• Radio observations of the circumnuclear ring in NGC6951

Cited by in corpus (6)

• Determining the Nature of the Extended HI Structure Around LITTLE THINGS Dwarf Galaxy NGC 1569
• Hubble Space Telescope Pixel Analysis of the Interacting S0 Galaxy NGC 5195 (M51B)
• Detection and characterization of detached tidal dwarf galaxies
• HI in Arp72 and similarities with M51-type systems
• Metallicity and Star Formation Activities of the Interacting System Arp 86 from Observation with MOS on Xinglong 2.16m Telescope
• The curious case of J113924.74+164144.0: a possible new group of galaxies at z = 0.0693