HI and OH Absorption toward NGC6240

Abstract

VLA observations of large-scale HI and OH absorption in the merging galaxy of NGC6240 are presented with 1 arcsec resolution. HI absorption is found across large areas of the extended radio continuum structure with a strong concentration towards the double-nucleus. The OH absorption is confined to the nuclear region. The HI and OH observations identify fractions of the gas disks of the two galaxies and confirm the presence of central gas accumulation between the nuclei. The data clearly identify the nucleus of the southern galaxy as the origin of the symmetric superwind outflow and also reveal blue-shifted components resulting from a nuclear starburst. Various absorption components are associated with large-scale dynamics of the system including a foreground dust lane crossing the radio structure in the northwest region.

To be published in the ApJ, Vol 661, May 20, 2007, 32 pages, 11 figures

References in corpus (4)

• A Survey of Kiloparsec-Scale Radio Outflows in Radio-Quiet Active Galactic Nuclei
• Extragalactic H_2O masers and X-ray absorbing column densities
• The Core of NGC 6240 from Keck Adaptive Optics and HST NICMOS Observations
• Dense and Warm Molecular Gas between Double Nuclei of the Luminous Infrared Galaxy NGC 6240

Cited by in corpus (14)

• Dense gas in luminous infrared galaxies
• The interstellar and circumnuclear medium of active nuclei traced by HI 21-cm absorption
• ALMA [CI]${}^3{P}_1{-}^3{P}_0$ observations of NGC6240: a puzzling molecular outflow, and the role of outflows in the global ${\alpha }_{\mathrm{CO}}$ factor of (U)LIRGs
• Central molecular zones in galaxies: 12CO-to-13CO ratios, carbon budget, and X factors
• The Molecular Gas in the NGC 6240 Merging Galaxy System at the Highest Spatial Resolution
• The Exceptional Soft X-ray Halo of the Galaxy Merger NGC 6240
• Prevalence of neutral gas in centres of merging galaxies
• VLBI Observations of NGC6240: resolving the double nuclei and radio supernovae
• Prevalence of neutral gas in centres of merging galaxies-II: nuclear HI and multi-wavelength properties
• Tracing the Ionization Structure of the Shocked Filaments of NGC 6240
• The JWST/NIRSpec view of the nuclear region in the prototypical merging galaxy NGC 6240
• High-Resolution Imaging of Water Maser Emission in the active galaxies NGC 6240 and M51
• Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
• Mapping the diffuse interstellar bands $\lambda$5780 and $\lambda$6284 in the luminous infrared galaxy merger NGC 6240