Optical spectroscopy of young tidal objects around two interacting galaxy pairs

Abstract

We present Gemini Multi-Object Spectrograph (GMOS) spectra of HI-rich tidal features located around the outskirts of two interacting galaxy pairs, NGC 3166/9 and NGC 4725/47. These follow-up observations are part of a multi-wavelength campaign to study the properties and frequency of tidal dwarf galaxies (TDGs) in group environments. Based on the calculated gas-phase metallicity and redshift, in addition to the previously measured HI and stellar properties, we have confirmed the tidal origins of TDG candidate AGC 208457, which has emerged from the tidal debris of an interaction between the NGC 3166/9 galaxy pair. By comparing HI and optical recessional velocities, we have also confirmed a physical association of the gaseous knots and star clusters embedded in the metal-rich tidal tail of NGC 4747.

7 pages, 5 figures

References in corpus (7)

• From Tidal Dwarf Galaxies to Satellite Galaxies
• Identification of old tidal dwarfs near early-type galaxies from deep imaging and HI observations
• New HI scaling relations to probe the HI content of galaxies via global HI-deficiency maps
• On the maximum value of the cosmic abundance of oxygen and the oxygen yield
• An HI Threshold for Star Cluster Formation in Tidal Debris
• Pre-existing dwarfs, tidal knots and a tidal dwarf galaxy: an unbiased HI study of the gas-rich interacting galaxy group NGC 3166/9
• Arp 202: a TDG formed in a parent's extended dark matter halo?

Cited by in corpus (5)

• Catching Tidal Dwarf Galaxies at a Later Evolutionary Stage with ALFALFA
• The impact of stellar bars on star-formation quenching: Insights from a spatially resolved analysis in the local Universe
• The Future of Dwarf Galaxy Research: What Telescopes Will Discover
• Searching for intergalactic star forming regions in Stephan's Quintet with SITELLE: II. Physical properties and metallicity
• Young, blue, and isolated stellar systems in the Virgo Cluster. II. A new class of stellar system