WALLABY Early Science – II. The NGC 7232 galaxy group. Issue 4 (5th January 2019)
- Record Type:
- Journal Article
- Title:
- WALLABY Early Science – II. The NGC 7232 galaxy group. Issue 4 (5th January 2019)
- Main Title:
- WALLABY Early Science – II. The NGC 7232 galaxy group
- Authors:
- Lee-Waddell, K
Koribalski, B S
Westmeier, T
Elagali, A
For, B-Q
Kleiner, D
Madrid, J P
Popping, A
Reynolds, T N
Rhee, J
Serra, P
Shao, L
Staveley-Smith, L
Wang, J
Whiting, M T
Wong, O I
Allison, J R
Bhandari, S
Collier, J D
Heald, G
Marvil, J
Ord, S M - 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 deg 2 . 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 × 10 8 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.
- Is Part Of:
- Monthly notices of the Royal Astronomical Society. Volume 487:Issue 4(2019)
- Journal:
- Monthly notices of the Royal Astronomical Society
- Issue:
- Volume 487:Issue 4(2019)
- Issue Display:
- Volume 487, Issue 4 (2019)
- Year:
- 2019
- Volume:
- 487
- Issue:
- 4
- Issue Sort Value:
- 2019-0487-0004-0000
- Page Start:
- 5248
- Page End:
- 5262
- Publication Date:
- 2019-01-05
- Subjects:
- galaxies: groups: individual: NGC 7232 -- galaxies: interactions
Astronomy -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://mnras.oxfordjournals.org/ ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966 ↗
http://www.blackwell-synergy.com/issuelist.asp?journal=mnr ↗
http://www.blackwell-synergy.com/loi/mnr ↗
http://ukcatalogue.oup.com/ ↗ - DOI:
- 10.1093/mnras/stz017 ↗
- Languages:
- English
- ISSNs:
- 0035-8711
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5943.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 11992.xml