Volume 643, November 2020
|Number of page(s)||16|
|Published online||16 November 2020|
MeerKAT HI commissioning observations of MHONGOOSE galaxy ESO 302-G014
Netherlands Institute for Radio Astronomy (ASTRON), Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands
2 Dept. of Astronomy, Univ. of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
3 Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen, The Netherlands
4 Aix Marseille Univ., CNRS, CNES, LAM, Marseille, France
5 Observatoire de Paris, Collège de France, Université PSL, Sorbonne Université, CNRS, LERMA, Paris, France
6 Department of Physics and Astronomy, University of Manitoba, Winnipeg R3T 2N2, Manitoba, Canada
7 CSIRO Astronomy and Space Science, PO Box 1130, Bentley, WA 6102, Australia
8 Ruhr-Universität Bochum, Faculty of Physics and Astronomy, Astronomical Institute, 44780 Bochum, Germany
9 Australia Telescope National Facility, CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia
10 Western Sydney University, Locked Bag 1797, Penrith South, NSW 1797, Australia
11 ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia
12 International Centre for Radio Astronomy Research, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
13 Dep. to Astronomia Extragaláctica Istituto Astrofisica de Andalucía, Glorieta de la Astronomia s/n, 18008 Granada, Spain
14 Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
15 Center for Cosmology and Astroparticle Physics, 191 West Woodruff Avenue, Columbus, OH 43210, USA
16 Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany
17 Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK
18 Centro de Astronomía, Universidad de Antofagasta, Avda. U. de Antofagasta, 02800 Antofagasta, Chile
19 INAF – Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius, CA, Italy
20 Department of Physics & Astronomy, West Virginia University, Morgantown, WV 26506, USA
21 Gravitational Waves and Cosmology Center, Chestnut Ridge Research Building, Morgantown, WV 26505, USA
22 Adjunct Astronomer, Green Bank Observatory, 155 Observatory Road, Green Bank, WV 24944, USA
23 Department of Physics and Space Science, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
24 Laboratoire de Physique et de Chimie de l’Environnement, Observatoire d’Astrophysique de l’Université Ouaga I Pr. Joseph KiZerbo (ODAUO), 03 BP 7021, Ouaga 03, Burkina Faso
25 E.A. Milne Centre for Astrophysics, University of Hull, Hull HU6 7RX, UK
26 Department of Physics and Astronomy, University of Louisville, 102 Natural Science Building, Louisville, KY 40292, USA
27 South African Radio Astronomy Oberservatory, Black River Park, 2 Fir Street, Observatory, Cape Town 7925, South Africa
28 Department of Physics and Electronics, Rhodes University, PO Box 94, Makhanda 6140, South Africa
29 Department of Physics, Virginia Polytechnic Institute and State University, 50 West Campus Drive, Blacksburg, VA 24061, USA
30 NASA Headquarters, 300 E Street SW, Washington, DC 20546, USA
31 Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
32 Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
33 Department of Astrophysics/IMAPP, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands
34 Inter-University Institute for Data Intensive Astronomy & Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
35 South African Astronomical Observatory, PO Box 9, 7935 Observatory, South Africa
36 Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
37 IAU-Office For Astronomy for Development, PO Box 9, 7935 Observatory, South Africa
38 Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University, 1800 Sherman Ave., Evanston, IL 60201, USA
Accepted: 9 September 2020
Aims. We present the results of three commissioning H I observations obtained with the MeerKAT radio telescope. These observations make up part of the preparation for the forthcoming MHONGOOSE nearby galaxy survey, which is a MeerKAT large survey project that will study the accretion of gas in galaxies and the link between gas and star formation.
Methods. We used the available H I data sets, along with ancillary data at other wavelengths, to study the morphology of the MHONGOOSE sample galaxy, ESO 302-G014, which is a nearby gas-rich dwarf galaxy.
Results. We find that ESO 302-G014 has a lopsided, asymmetric outer disc with a low column density. In addition, we find a tail or filament of H I clouds extending away from the galaxy, as well as an isolated H I cloud some 20 kpc to the south of the galaxy. We suggest that these features indicate a minor interaction with a low-mass galaxy. Optical imaging shows a possible dwarf galaxy near the tail, but based on the current data, we cannot confirm any association with ESO 302-G014. Nonetheless, an interaction scenario with some kind of low-mass companion is still supported by the presence of a significant amount of molecular gas, which is almost equal to the stellar mass, and a number of prominent stellar clusters, which suggest recently triggered star formation.
Conclusions. These data show that MeerKAT produces exquisite imaging data. The forthcoming full-depth survey observations of ESO 302-G014 and other sample galaxies will, therefore, offer insights into the fate of neutral gas as it moves from the intergalactic medium onto galaxies.
Key words: galaxies: clusters: individual: ESO 302-G014 / galaxies: dwarf / galaxies: ISM / radio lines: galaxies
© ESO 2020
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.