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.
Buckland-Willis, F.
中科院分区:
物理与天体物理3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.

文献摘要

参考文献

被引文献

相似文献

作为银河澳大利亚平方公里阵列探路者 (GASKAP) 试点调查的一部分,我们通过结合来自澳大利亚平方公里阵列探路者 (ASKAP) 和帕克斯 (穆里扬) 的数据,呈现了与小麦哲伦星云 (SMC) 相关的中性氢 ( ) 排放的最敏感和详细的视图。这些 GASKAP-HI 试点观测首次在 SMC 中揭示了与星际介质的其他重要示踪剂(例如分子气体和尘埃)类似的物理尺度。所得图像立方体的均方根噪声水平为 1.1 K ( ) 光谱通道,角分辨率为 ( )。我们讨论了校准方案和定制成像管道,该管道利用联合反卷积方法,有效地分布在计算集群中,以准确恢复延伸到整个视场的发射。我们提供了数据产品的概述,并通过推导全光谱范围内的全局传递函数来表征几个方面,包括作为角分辨率函数的噪声属性和所表示的空间尺度。对各个光谱通道的初步空间功率谱分析表明,密度分布的幂律性质延伸至 10 pc 的尺度。我们通过将流出的高速云的特性与之前的 ASKAP+Parkes 测试观测结果进行比较,强调了这些数据的科学潜力。
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.
星暴驱动的银河流出的物理性质
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.
小麦哲伦星云的 H i 孔径合成镶嵌图
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
DOI: 10.1051/0004-6361/201629178
发表时间: 2016-10-01
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
重温大麦哲伦星云的 H I 运动学:可能流入和流出的证据
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
G. Indu;A. Subramaniam
通讯作者: A. Subramaniam