Multi-wavelength Study of IRAS 19254-7245 - The Superantennae

Abstract

We present observations in the optical, near-infrared and millimetre bands of the Ultraluminous Infrared galaxy IRAS 19254-7245, also known as "The Superantennae". This galaxy is an interacting system with a double nucleus and long tails extending for about 350 kpc. We studied in detail the southern component of the system which is optically classified as a Sy2 galaxy. We have developed a method to determine the parameters of the emission lines in a spectrum in the case of multiple components and severe blending. Our data allow us to build a picture of the environment around the nucleus of the galaxy with unprecedented detail. The optical lines show a complex dynamical structure that is not observable in the near-infrared. In addition we find typical features of AGN such as the coronal lines of [FeVII]5721 and [SiVI]1.96. We also detect strong emission from [FeII]1.64 and $H_2$.

References in corpus (4)

• The Nuclear Starburst in NGC 253
• Molecular Gas Depletion and Starbursts in Luminous Infrared Galaxy Mergers
• Extended mid-infrared emission from VV 114: probing the birth of a ULIRG
• Multicolour Optical Imaging of IR-Warm Seyfert Galaxies. I. Introduction and Sample Selection

Cited by in corpus (10)

• The subarcsecond mid-infrared view of local active galactic nuclei: I. The N- and Q-band imaging atlas
• Do dwarf galaxies form in tidal tails?
• Seyfert 2 Galaxies with Spectropolarimetric Observations
• Spatially-resolved spectrophotometric analysis and modelling of the Superantennae
• XMM-Newton observations of ULIRGs I: A Compton-thick AGN in IRAS19254-7245
• Revealing the active galactic nucleus in the superantennae through L-band spectroscopy
• NIR Spectroscopy of Luminous Infrared Galaxies and the Hydrogen Recombination Photon Deficit
• VLT/SINFONI Integral Field Spectroscopy of The Super-antennae
• ALMA detection of millimetre 183 GHz H2O maser emission in the Superantennae galaxy at z ~ 0.06
• Spectroscopically- and spatially-resolved optical line emission in the Superantennae (IRAS 19254-7245)