Abstract
We present a study of the physical properties of JO201, a unique disk galaxy with extended tails undergoing extreme ram-pressure stripping as it moves through the massive cluster Abell 85 at supersonic speeds mostly along the line of sight. JO201 was observed with MUSE as part of the GASP programme. In a previous paper (GASP II) we studied the stellar and gas kinematics. In this paper we present emission-line ratios, gas-phase metallicities and ages of the stellar populations across the galaxy disk and tails. We find that while the emission at the core of the galaxy is dominated by an active galactic nucleus (AGN), the disk is composed of star-forming knots surrounded by excited diffuse gas. The collection of star-forming knots presents a metallicity gradient steadily decreasing from the centre of the galaxy outwards, and the ages of the stars across the galaxy show that the tails formed
Original language | English |
---|---|
Pages (from-to) | 1157-1170 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 485 |
Issue number | 1 |
Early online date | 17 Feb 2019 |
DOIs | |
Publication status | Published - 1 May 2019 |
Bibliographical note
17 pages, 12 figuresKeywords
- astro-ph.GA
- galaxies: ISM
- galaxies: clusters: intracluster medium
- galaxies: interactions