GASKAP-HI pilot survey science I: ASKAP zoom observations of Hi emission in the Small Magellanic Cloud
GASKAP-HI pilot survey science I: ASKAP zoom observations of Hi emission in the Small Magellanic Cloud
复制标题
GASKAP-HI 试点调查科学 I:ASKAP 对小麦哲伦云中 Hi 发射的变焦观测
DOI:
10.1017/pasa.2021.59
复制
发表时间:
2022
影响因子:
6.3
通讯作者:
Buckland-Willis, F.
中科院分区:
文献类型:
--
作者:
Pingel, N. M.;Dempsey, J.;McClure-Griffiths, N. M.;Dickey, J. M.;Jameson, K. E.;Arce, H.;Anglada, G.;Bland-Hawthorn, J.;Breen, S. L.;Buckland-Willis, F.
We present the most sensitive and detailed view of the neutral hydrogen ( ) emission associated with the Small Magellanic Cloud (SMC), through the combination of data from the Australian Square Kilometre Array Pathfinder (ASKAP) and Parkes (Murriyang), as part of the Galactic Australian Square Kilometre Array Pathfinder (GASKAP) pilot survey. These GASKAP-HI pilot observations, for the first time, reveal in the SMC on similar physical scales as other important tracers of the interstellar medium, such as molecular gas and dust. The resultant image cube possesses an rms noise level of 1.1 K ( ) spectral channel with an angular resolution of ( ). We discuss the calibration scheme and the custom imaging pipeline that utilises a joint deconvolution approach, efficiently distributed across a computing cluster, to accurately recover the emission extending across the entire field-of-view. We provide an overview of the data products and characterise several aspects including the noise properties as a function of angular resolution and the represented spatial scales by deriving the global transfer function over the full spectral range. A preliminary spatial power spectrum analysis on individual spectral channels reveals that the power law nature of the density distribution extends down to scales of 10 pc. We highlight the scientific potential of these data by comparing the properties of an outflowing high-velocity cloud with previous ASKAP+Parkes test observations.
登录
查看更多内容
DOI:
10.3847/1538-4357/ab8ae8
发表时间:
2020
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Schneider, Evan E.;Ostriker, Eve C.;Robertson, Brant E.;Thompson, Todd A.
通讯作者:
Thompson, Todd A.
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
L. Stavely;R. J. Saul;D. Hatzidimitriou;M. Kesteven;D. McConnell
通讯作者:
D. McConnell
影响因子:
6.5
作者:
Ben Bekhti, N.;Floer, L.;Staveley-Smith, L.
通讯作者:
Staveley-Smith, L.
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
K. Grisdale;O. Agertz;A. Romeo;F. Renaud;J. Read
通讯作者:
J. Read
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
G. Indu;A. Subramaniam
通讯作者:
A. Subramaniam