An infrared study of the double nucleus in NGC3256

Abstract

We present new resolved near and mid-IR imaging and N-band spectroscopy of the two nuclei in the merger system NGCA3256, the most IR luminous galaxy in the nearby universe. The results from the SED fit to the data are consistent with previous estimates of the amount of obscuration towards the nuclei and the nuclear star formation rates. However, we also find substantial differences in the infrared emission from the two nuclei which cannot be explained by obscuration alone. We conclude that the northern nucleus requires an additional component of warm dust in order to explain its properties. This suggests that local starforming conditions can vary significantly within the environment of a single system.

arXiv commentAccepted for publication (MNRAS)

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• ALMA Astrochemical Observations of the Infrared-Luminous Merger NGC 3256
• Outflow of hot and cold molecular gas from the obscured secondary nucleus of NGC3256: closing in on feedback physics
• The MUSE Atlas of Disks (MAD): Ionized gas kinematic maps and an application to Diffuse Ionized Gas
• ALMA observations of HCN and HCO+ outflows in the merging galaxy NGC 3256
• Infrared and X-Ray Evidence of an AGN in the NGC 3256 Southern Nucleus
• JWST's PEARLS: resolved study of the stellar and dust components in starburst galaxies at cosmic noon
• New H2O masers in Seyfert and FIR bright galaxies. III. The Southern Sample
• Star formation traced by optical and millimeter hydrogen recombination lines and free-free emissions in the dusty merging galaxy NGC 3256 -- MUSE/VLT and ALMA synergy
• JWST reveals the diversity of nuclear obscuring dust in nearby AGN: nuclear isolation of MIRI/MRS datacubes and continuum spectral fitting
• A Spectral Analysis of the Centimeter Regime of Nearby Galaxies: RRLs, Excited OH, and NH${}_3$