Shocked Gas in IRAS F17207-0014: ISM Collisions and Outflows

Abstract

We combine optical and near-infrared AO-assisted integral field observations of the merging ULIRG IRAS F17207-0014 from the Wide-Field Spectrograph (WiFeS) and Keck/OSIRIS. The optical emission line ratios [N II]/H$\alpha$, [S II]/H$\alpha$, and [O I]/H$\alpha$ reveal a mixing sequence of shocks present throughout the galaxy, with the strongest contributions coming from large radii (up to 100% at $\sim$5 kpc in some directions), suggesting galactic-scale winds. The near-infrared observations, which have approximately 30 times higher spatial resolution, show that two sorts of shocks are present in the vicinity of the merging nuclei: low-level shocks distributed throughout our field-of-view evidenced by an H${}_2$/Br$\gamma$ line ratio of $\sim$0.6-4, and strong collimated shocks with a high H${}_2$/Br$\gamma$ line ratio of $\sim$4-8, extending south from the two nuclear disks approximately 400 pc ($\sim$0.5 arcsec). Our data suggest that the diffuse shocks are caused by the collision of the interstellar media associated with the two progenitor galaxies and the strong shocks trace the base of a collimated outflow coming from the nucleus of one of the two disks.

accepted to MNRAS

References in corpus (13)

• The Host Galaxies and Classification of Active Galactic Nuclei
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• The MAPPINGS III Library of Fast Radiative Shock Models
• Massive molecular outflows and negative feedback in ULIRGs observed by Herschel-PACS
• The Wide Field Spectrograph (WiFeS): Performance and Data Reduction
• Magnetic Fields in Starburst Galaxies and The Origin of the FIR-Radio Correlation
• Ionized gas outflows and global kinematics of low-z luminous star forming galaxies
• The SAMI Galaxy Survey: Shocks and Outflows in a normal star-forming galaxy
• Powerful High Velocity-Dispersion Molecular Hydrogen Associated with an Intergalactic Shock Wave in Stephan's Quintet
• Fueling AGN II: Spatially Resolved Molecular Inflows and Outflows
• Mapping Large-Scale Gaseous Outflows in Ultraluminous Infrared Galaxies with Keck II ESI Spectra: Spatial Extent of the Outflow
• Warm Molecular Hydrogen in the Galactic Wind of M82
• Optical IFU Observations of the Brightest Cluster Galaxy NGC 4696: The Case for a Minor Merger and Shock-excited Filaments

Cited by in corpus (18)

• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• Understanding Galaxy Evolution through Emission Lines
• A Review of Recent Observations of Galactic Winds Driven by Star Formation
• LZIFU: an emission-line fitting toolkit for integral field spectroscopy data
• Narrow line AGN selection in CEERS: spectroscopic selection, physical properties, X-ray and radio analysis
• GOALS-JWST: Gas Dynamics and Excitation in NGC7469 revealed by NIRSpec
• Outflows of hot molecular gas in ultra-luminous infra-red galaxies mapped with VLT-SINFONI
• Characterizing Compact 15-33 GHz Radio Continuum Sources in Local U/LIRGs
• Physical Properties of Massive Compact Starburst Galaxies with Extreme Outflows
• AGN Feedback in Quiescent Galaxies at Cosmic Noon Traced by Ionized Gas Emission
• The complex evolutionary paths of local infrared bright galaxies: a high angular resolution mid-infrared view
• The Role of AGN in Luminous Infrared Galaxies from the Multiwavelength Perspective
• Molecular and Ionized Hydrogen in 30 Doradus. I. Imaging Observations
• New Ionization Models and the Shocking Nitrogen Excess at z > 5
• Tracing the Ionization Structure of the Shocked Filaments of NGC 6240
• Investigating the evolution of the dual AGN system ESO~509-IG066
• Extremely Buried Nucleus of IRAS 17208$-$0014 Observed at Sub-Millimeter and Near-Infrared Wavelengths
• Shockingly Effective: Cluster Winds as Engines of Feedback in Starburst Galaxy VV 114