- Title
- WALLABY - an SKA Pathfinder Hi survey
- Creator
- Koribalski, Bärbel S.; Staveley-Smith, L.; Zwaan, M.; Kilborn, V.; Bekiaris, G.; Bekki, K.; Bigiel, F.; Boselli, A.; Bosma, A.; Catinella, B.; Chauhan, G.; Cluver, M. E.; Westmeier, T.; Colless, M.; Courtois, HM; Crain, RA; de Blok, WJG; Denes, H; Duffy, AR; Elagali, A; Fluke, CJ; For, B-Q; Heald, G; Serra, P.; Henning, PA; Hess, KM; Holwerda, BW; Howlett, C; Jarrett, T; Jones, D. H.; Jones, MG; Jozsa, GIG; Jurek, R; Juette, E; Spekkens, K.; Kamphuis, P; Karachentsev, I; Kerp, J; Kleiner, D; Kraan-Korteweg, RC; Lopez-Sanchez, AR; Madrid, J; Meyer, M; Mould, J; Murugeshan, C; Wong, O.; Norris, RP; Oh, S-H; Oosterloo, TA; Popping, A; Putman, M; Reynolds, TN; Rhee, J; Robotham, ASG; Ryder, S; Schroder, AC; Lee-Waddell, K.; Shao, L; Stevens, ARH; Taylor, EN; van der Hulst, JM; Verdes-Montenegro, L; Wakker, BP; Wang, J; Whiting, M; Winkel, B; Wolf, C; Lagos, C. D. P.; Obreschkow, D.; Ryan-Weber, E.
- Relation
- Astrophyics and Space Science Vol. 365, Issue 13 July 2020, no. 118
- Publisher Link
- http://dx.doi.org/10.1007/s10509-020-03831-4
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2020
- Description
- The Widefield ASKAP L-band Legacy All-sky Blind surveY (wallaby) is a next-generation survey of neutral hydrogen (H i) in the Local Universe. It uses the widefield, high-resolution capability of the Australian Square Kilometer Array Pathfinder (ASKAP), a radio interferometer consisting of 36×12-m dishes equipped with Phased-Array Feeds (PAFs), located in an extremely radio-quiet zone in Western Australia. wallaby aims to survey three-quarters of the sky (−90∘<δ<+30∘) to a redshift of z≲0.26, and generate spectral line image cubes at ∼30 arcsec resolution and ∼1.6 mJy beam−1 per 4 km s−1 channel sensitivity. ASKAP’s instantaneous field of view at 1.4 GHz, delivered by the PAF’s 36 beams, is about 30 sq deg. At an integrated signal-to-noise ratio of five, wallaby is expected to detect around half a million galaxies with a mean redshift of z∼0.05 (∼200 Mpc). The scientific goals of wallaby include: (a) a census of gas-rich galaxies in the vicinity of the Local Group; (b) a study of the H i properties of galaxies, groups and clusters, in particular the influence of the environment on galaxy evolution; and (c) the refinement of cosmological parameters using the spatial and redshift distribution of low-bias gas-rich galaxies. For context we provide an overview of recent and planned large-scale H i surveys. Combined with existing and new multi-wavelength sky surveys, wallaby will enable an exciting new generation of panchromatic studies of the Local Universe. — First results from the wallaby pilot survey are revealed, with initial data products publicly available in the CSIRO ASKAP Science Data Archive (CASDA).
- Subject
- radio lines; galaxies; ISM; surveys; evolution
- Identifier
- http://hdl.handle.net/1959.13/1445976
- Identifier
- uon:42725
- Identifier
- ISSN:0004-640X
- Language
- eng
- Reviewed
- Hits: 20277
- Visitors: 20271
- Downloads: 0