Details

Autor(en) / Beteiligte

• Koribalski, Bärbel S.
• Staveley-Smith, L.
• Westmeier, T.
• Serra, P.
• Spekkens, K.
• Wong, O. I.
• Lee-Waddell, K.
• Lagos, C. D. P.
• Obreschkow, D.
• Ryan-Weber, E. V.
• Zwaan, M.
• Kilborn, V.
• Bekiaris, G.
• Bekki, K.
• Bigiel, F.
• Boselli, A.
• Bosma, A.
• Catinella, B.
• Chauhan, G.
• Cluver, M. E.
• Colless, M.
• Courtois, H. M.
• Crain, R. A.
• de Blok, W. J. G.
• Dénes, H.
• Duffy, A. R.
• Elagali, A.
• Fluke, C. J.
• For, B.-Q.
• Heald, G.
• Henning, P. A.
• Hess, K. M.
• Holwerda, B. W.
• Howlett, C.
• Jarrett, T.
• Jones, D. H.
• Jones, M. G.
• Józsa, G. I. G.
• Jurek, R.
• Jütte, E.
• Kamphuis, P.
• Karachentsev, I.
• Kerp, J.
• Kleiner, D.
• Kraan-Korteweg, R. C.
• López-Sánchez, Á. R.
• Madrid, J.
• Meyer, M.
• Mould, J.
• Murugeshan, C.
• Norris, R. P.
• Oh, S.-H.
• Oosterloo, T. A.
• Popping, A.
• Putman, M.
• Reynolds, T. N.
• Rhee, J.
• Robotham, A. S. G.
• Ryder, S.
• Schröder, A. C.
• Shao, Li
• Stevens, A. R. H.
• Taylor, E. N.
• van der Hulst, J. M.
• Verdes-Montenegro, L.
• Wakker, B. P.
• Wang, J.
• Whiting, M.
• Winkel, B.
• Wolf, C.

Titel

WALLABY – an SKA Pathfinder H i survey

Ist Teil von

• Astrophysics and space science, 2020-07, Vol.365 (7), Article 118

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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).