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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27496
Title: GASP. V. Ram-pressure stripping of a ring Hoag's-like galaxy in a massive cluster
Authors: MORETTI, ALESSIA 
POGGIANTI, Bianca Maria 
GULLIEUSZIK, MARCO 
Mapelli, M.
Jaffé, Y. L.
Fritz, J.
BIVIANO, ANDREA 
Fasano, G.
BETTONI, Daniela 
Vulcani, Benedetta 
D'Onofrio, M.
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 475
Issue: 3
First Page: 4055
Abstract: Through an ongoing MUSE program dedicated to study gas removal processes in galaxies (GAs Stripping Phenomena in galaxies with MUSE, GASP), we have obtained deep and wide integral field spectroscopy of the galaxy JO171. This galaxy resembles the Hoag's galaxy, one of the most spectacular examples of ring galaxies, characterized by a completely detached ring of young stars surrounding a central old spheroid. At odds with the isolated Hoag's galaxy, JO171 is part of a dense environment, the cluster Abell 3667, which is causing gas stripping along tentacles. Moreover, its ring counter-rotates with respect to the central spheroid. The joint analysis of the stellar populations and the gas/stellar kinematics shows that the origin of the ring was not due to an internal mechanism, but was related to a gas accretion event that happened in the distant past, prior to accretion on to Abell 3667, most probably within a filament. More recently, since infall in the cluster, the gas in the ring has been stripped by ram pressure, causing the quenching of star formation in the stripped half of the ring. This is the first observed case of ram-pressure stripping in action in a ring galaxy, and MUSE observations are able to reveal both of the events (accretion and stripping) that caused dramatic transformations in this galaxy.
URI: http://hdl.handle.net/20.500.12386/27496
URL: https://academic.oup.com/mnras/article/475/3/4055/4797186
ISSN: 0035-8711
DOI: 10.1093/mnras/sty085
Bibcode ADS: 2018MNRAS.475.4055M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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