The merger history, AGN and dwarf galaxies of Hickson Compact Group 59
I. S. Konstantopoulos (1), S. C. Gallagher (2), K. Fedotov (2, 3), P., R. Durrell (4), P. Tzanavaris (5, 6, 7), A. R. Hill (2), A. I. Zabludoff (8),, M. L. Maier (9), D. M. Elmegreen (10), J. C. Charlton (1), K. E. Johnson (11,, 12), W. N. Brandt (1), L. M. Walker (11)

TL;DR
This study investigates the complex interactions, star formation, and nuclear activity in Hickson Compact Group 59 through multi-wavelength observations, revealing recent interactions, a low-luminosity AGN, and revised group dynamics.
Contribution
It provides a detailed multi-wavelength analysis of HCG 59, updating its dynamical mass, evolutionary stage, and revealing a low-luminosity AGN and recent interaction signatures.
Findings
Revised group mass increased by up to a factor of 10.
Detected a low-luminosity AGN in HCG 59A.
Identified recent interaction evidence via a stellar stream.
Abstract
Compact group galaxies often appear unaffected by their unusually dense environment. Closer examination can, however, reveal the subtle, cumulative effects of multiple galaxy interactions. Hickson Compact Group (HCG) 59 is an excellent example of this situation. We present a photometric study of this group in the optical (HST), infrared (Spitzer) and X-ray (Chandra) regimes aimed at characterizing the star formation and nuclear activity in its constituent galaxies and intra-group medium. We associate five dwarf galaxies with the group and update the velocity dispersion, leading to an increase in the dynamical mass of the group of up to a factor of 10 (to 2.8e13 Msun), and a subsequent revision of its evolutionary stage. Star formation is proceeding at a level consistent with the morphological types of the four main galaxies, of which two are star-forming and the other two quiescent.…
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