WALLABY Early Science – II. The NGC 7232 galaxy group

Author:

Lee-Waddell K1ORCID,Koribalski B S1ORCID,Westmeier T2ORCID,Elagali A123,For B-Q23ORCID,Kleiner D14,Madrid J P1,Popping A25,Reynolds T N123,Rhee J235ORCID,Serra P4,Shao L67ORCID,Staveley-Smith L23ORCID,Wang J6,Whiting M T1,Wong O I23,Allison J R38ORCID,Bhandari S1,Collier J D1910ORCID,Heald G311,Marvil J1,Ord S M1ORCID

Affiliation:

1. CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia

2. International Centre for Radio Astronomy Research, The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia

3. ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia

4. INAF – Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy

5. ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Australia

6. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China

7. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia

8. Sub-Department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK

9. School of Computing, Engineering and Mathematics, Western Sydney University, Locked Bay 1797, Penrith, NSW 2751, Australia

10. Inter-University Institute for Data Intensive Astronomy (IDIA), University of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa

11. CSIRO Astronomy and Space Sciences, PO Box 1130, Bentley, WA 6102, Australia

Abstract

Abstract We report on neutral hydrogen (H i) observations of the NGC 7232 group with the Australian Square Kilometre Array Pathfinder (ASKAP). These observations were conducted as part of the Wide-field ASKAP L-Band Legacy All-sky Blind surveY (WALLABY) Early Science program with an array of 12 ASKAP antennas equipped with Phased Array Feeds, which were used to form 36 beams to map a field of view of 30 deg2. Analysing a subregion of the central beams, we detect 17 H i sources. Eleven of these detections are identified as galaxies and have stellar counterparts, of which five are newly resolved H i galaxy sources. The other six detections appear to be tidal debris in the form of H i clouds that are associated with the central triplet, NGC 7232/3, comprising the spiral galaxies NGC 7232, NGC 7232B, and NGC 7233. One of these H i clouds has a mass of MH i ∼ 3 × 108 M⊙ and could be the progenitor of a long-lived tidal dwarf galaxy. The remaining H i clouds are likely transient tidal knots that are possibly part of a diffuse tidal bridge between NGC 7232/3 and another group member, the lenticular galaxy IC 5181.

Funder

Commonwealth Scientific and Industrial Research Organisation

Government of Western Australia

Science and Industry Endowment Fund

Australian Research Council

European Research Council

Horizon 2020

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 31 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A serendipitous discovery of H i-rich galaxy groups with MeerKAT;Monthly Notices of the Royal Astronomical Society;2024-03-23

2. Discovery of a Large-scale H i Plume in the NGC 7194 Group;The Astrophysical Journal Letters;2024-01-01

3. When and How Ram Pressure Stripping in Low-mass Satellite Galaxies Enhances Star Formation;The Astrophysical Journal;2023-12-21

4. The MeerKAT Fornax Survey;Astronomy & Astrophysics;2023-05

5. MIGHTEE-H i: possible interactions with the galaxy NGC 895;Monthly Notices of the Royal Astronomical Society;2023-03-23

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3