GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud

N. M. Pingel; J. Dempsey; N. M. McClure-Griffiths; J. M. Dickey; K. E. Jameson; H. Arce; G. Anglada; J. Bland-Hawthorn; S. L. Breen; F. Buckland-Willis; S. E. Clark; J. R. Dawson; H. Denes; E. M. Di Teodoro; B. Q. For; T. J. Foster; J. F. Gomez; H. Imai; G. Joncas; C. G. Kim; M. Y. Lee; C. Lynn; D. Leahy; Y. K. Ma; A. Marchal; D. McConnell; M. A. Miville-Deschenes; V. A. Moss; C. E. Murray; D. Nidever; J. Peek; S. Stanimirovic; L. Staveley-Smith; T. Tepper-Garcia; C. D. Tremblay; L. Uscanga; J. Th. Van Loon; E. Vazquez-Semadeni; J. R. Allison; C. S. Anderson; L. Ball; M. Bell; D. C. J. Bock; J. Bunton; F. R. Cooray; T. Cornwell; B. S. Koribalski; N. Gupta; D. B. Hayman; L. Harvey-Smith; K. Lee-Waddell; A. Ng; C. J. Phillips; M. Voronkov; T. Westmeier; M. T. Whiting

doi:10.1017/pasa.2021.59

GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud

N. M. Pingel, J. Dempsey, N. M. McClure-Griffiths, J. M. Dickey, K. E. Jameson, H. Arce, G. Anglada, J. Bland-Hawthorn, S. L. Breen, F. Buckland-Willis, S. E. Clark, J. R. Dawson, H. Denes, E. M. Di Teodoro, B. Q. For, T. J. Foster, J. F. Gomez, H. Imai, G. Joncas, C. G. KimM. Y. Lee, C. Lynn, D. Leahy, Y. K. Ma, A. Marchal, D. McConnell, M. A. Miville-Deschenes, V. A. Moss, C. E. Murray, D. Nidever, J. Peek, S. Stanimirovic, L. Staveley-Smith, T. Tepper-Garcia, C. D. Tremblay, L. Uscanga, J. Th. Van Loon, E. Vazquez-Semadeni, J. R. Allison, C. S. Anderson, L. Ball, M. Bell, D. C. J. Bock, J. Bunton, F. R. Cooray, T. Cornwell, B. S. Koribalski, N. Gupta, D. B. Hayman, L. Harvey-Smith, K. Lee-Waddell, A. Ng, C. J. Phillips, M. Voronkov, T. Westmeier, M. T. Whiting

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Abstract

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.

Original language	English
Article number	e005
Number of pages	24
Journal	Publications of the Astronomical Society of Australia
Volume	39
DOIs	https://doi.org/10.1017/pasa.2021.59
Publication status	Published - 7 Feb 2022

Bibliographical note

Publisher Copyright:
© The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia.

Open Access - Access Right Statement

© The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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., Clark, S. E., Dawson, J. R., Denes, H., Di Teodoro, E. M., For, B. Q., Foster, T. J., Gomez, J. F., Imai, H., Joncas, G., ... Whiting, M. T. (2022). GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud. Publications of the Astronomical Society of Australia, 39, Article e005. https://doi.org/10.1017/pasa.2021.59

@article{d3253e15bdd9456da5dc5c4b9e5beea1,

title = "GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud",

abstract = "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.",

author = "Pingel, {N. M.} and J. Dempsey and McClure-Griffiths, {N. M.} and Dickey, {J. M.} and Jameson, {K. E.} and H. Arce and G. Anglada and J. Bland-Hawthorn and Breen, {S. L.} and F. Buckland-Willis and Clark, {S. E.} and Dawson, {J. R.} and H. Denes and {Di Teodoro}, {E. M.} and For, {B. Q.} and Foster, {T. J.} and Gomez, {J. F.} and H. Imai and G. Joncas and Kim, {C. G.} and Lee, {M. Y.} and C. Lynn and D. Leahy and Ma, {Y. K.} and A. Marchal and D. McConnell and Miville-Deschenes, {M. A.} and Moss, {V. A.} and Murray, {C. E.} and D. Nidever and J. Peek and S. Stanimirovic and L. Staveley-Smith and T. Tepper-Garcia and Tremblay, {C. D.} and L. Uscanga and {Van Loon}, {J. Th.} and E. Vazquez-Semadeni and Allison, {J. R.} and Anderson, {C. S.} and L. Ball and M. Bell and Bock, {D. C. J.} and J. Bunton and Cooray, {F. R.} and T. Cornwell and Koribalski, {B. S.} and N. Gupta and Hayman, {D. B.} and L. Harvey-Smith and K. Lee-Waddell and A. Ng and Phillips, {C. J.} and M. Voronkov and T. Westmeier and Whiting, {M. T.}",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2022. Published by Cambridge University Press on behalf of the Astronomical Society of Australia.",

year = "2022",

month = feb,

day = "7",

doi = "10.1017/pasa.2021.59",

language = "English",

volume = "39",

journal = "Publications of the Astronomical Society of Australia",

issn = "1323-3580",

publisher = "CSIRO",

}

Pingel, NM, Dempsey, J, McClure-Griffiths, NM, Dickey, JM, Jameson, KE, Arce, H, Anglada, G, Bland-Hawthorn, J, Breen, SL, Buckland-Willis, F, Clark, SE, Dawson, JR, Denes, H, Di Teodoro, EM, For, BQ, Foster, TJ, Gomez, JF, Imai, H, Joncas, G, Kim, CG, Lee, MY, Lynn, C, Leahy, D, Ma, YK, Marchal, A, McConnell, D, Miville-Deschenes, MA, Moss, VA, Murray, CE, Nidever, D, Peek, J, Stanimirovic, S, Staveley-Smith, L, Tepper-Garcia, T, Tremblay, CD, Uscanga, L, Van Loon, JT, Vazquez-Semadeni, E, Allison, JR, Anderson, CS, Ball, L, Bell, M, Bock, DCJ, Bunton, J, Cooray, FR, Cornwell, T, Koribalski, BS, Gupta, N, Hayman, DB, Harvey-Smith, L, Lee-Waddell, K, Ng, A, Phillips, CJ, Voronkov, M, Westmeier, T & Whiting, MT 2022, 'GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud', Publications of the Astronomical Society of Australia, vol. 39, e005. https://doi.org/10.1017/pasa.2021.59

TY - JOUR

T1 - GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud

AU - Pingel, N. M.

AU - Dempsey, J.

AU - McClure-Griffiths, N. M.

AU - Dickey, J. M.

AU - Jameson, K. E.

AU - Arce, H.

AU - Anglada, G.

AU - Bland-Hawthorn, J.

AU - Breen, S. L.

AU - Buckland-Willis, F.

AU - Clark, S. E.

AU - Dawson, J. R.

AU - Denes, H.

AU - Di Teodoro, E. M.

AU - For, B. Q.

AU - Foster, T. J.

AU - Gomez, J. F.

AU - Imai, H.

AU - Joncas, G.

AU - Kim, C. G.

AU - Lee, M. Y.

AU - Lynn, C.

AU - Leahy, D.

AU - Ma, Y. K.

AU - Marchal, A.

AU - McConnell, D.

AU - Miville-Deschenes, M. A.

AU - Moss, V. A.

AU - Murray, C. E.

AU - Nidever, D.

AU - Peek, J.

AU - Stanimirovic, S.

AU - Staveley-Smith, L.

AU - Tepper-Garcia, T.

AU - Tremblay, C. D.

AU - Uscanga, L.

AU - Van Loon, J. Th.

AU - Vazquez-Semadeni, E.

AU - Allison, J. R.

AU - Anderson, C. S.

AU - Ball, L.

AU - Bell, M.

AU - Bock, D. C. J.

AU - Bunton, J.

AU - Cooray, F. R.

AU - Cornwell, T.

AU - Koribalski, B. S.

AU - Gupta, N.

AU - Hayman, D. B.

AU - Harvey-Smith, L.

AU - Lee-Waddell, K.

AU - Ng, A.

AU - Phillips, C. J.

AU - Voronkov, M.

AU - Westmeier, T.

AU - Whiting, M. T.

PY - 2022/2/7

Y1 - 2022/2/7

N2 - 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.

AB - 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.

UR - https://hdl.handle.net/1959.7/uws:78474

U2 - 10.1017/pasa.2021.59

DO - 10.1017/pasa.2021.59

M3 - Article

SN - 1323-3580

VL - 39

JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

M1 - e005

ER -

GASKAP-HI pilot survey science I : ASKAP zoom observations of Hi emission in the Small Magellanic Cloud

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