Tidal Origin of NGC 1427A in the Fornax Cluster
MNRAS 000,1{9 (2017) Preprint 30 October 2017 Compiled using MNRAS LATEX style file v3.0 Tidal origin of NGC 1427A in the Fornax cluster K. Lee-Waddell1?, P. Serra2;1, B. Koribalski1, A. Venhola3;4, E. Iodice5, B. Catinella6, L. Cortese6, R. Peletier3, A. Popping6;7, O. Keenan8, M. Capaccioli9 1CSIRO Astronomy and Space Sciences, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia 2INAF { Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy 3Kapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands 4Astronomy Research Unit, University of Oulu, FI-90014, Finland 5INAF { Astronomical Observatory of Capodimonte, via Moiariello 16, Naples, I-80131, Italy 6International Centre for Radio Astronomy Research, The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia 7CAASTRO: ARC Centre of Excellence for All-sky Astrophysics, Australia 8School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, United Kingsdom 9Dip.di Fisica Ettore Pancini, University of Naples \Federico II," C.U. Monte SantAngelo, Via Cinthia, I-80126, Naples, Italy Accepted 2017 October 26. Received 2017 October 15; in original form 2017 March 31 ABSTRACT We present new Hi observations from the Australia Telescope Compact Array and deep optical imaging from OmegaCam on the VLT Survey Telescope of NGC 1427A, an arrow-shaped dwarf irregular galaxy located in the Fornax cluster. The data reveal a star-less Hi tail that contains ∼10% of the atomic gas of NGC 1427A as well as extended stellar emission that shed new light on the recent history of this galaxy.
[Show full text]