A neutral hydrogen survey of the Large Magellanic Cloud: Aperture synthesis and multibeam data combined

S. Kim; Lister Staveley-Smith; M.A. Dopita; R.J. Sault; K.C. Freeman; Y. Lee; Y.H. Chu

doi:10.1086/376980

A neutral hydrogen survey of the Large Magellanic Cloud: Aperture synthesis and multibeam data combined

S. Kim, Lister Staveley-Smith, M.A. Dopita, R.J. Sault, K.C. Freeman, Y. Lee, Y.H. Chu

Research output: Contribution to journal › Article

179 Citations (Scopus)

Abstract

Recent H I surveys of the Large Magellanic Cloud (LMC) with the Australia Telescope Compact Array and the Parkes multibeam receiver have focused, respectively, on the small-scale (<20&PRIME;) structure of the interstellar medium (ISM) and the large-scale (>1degrees) structure of the galaxy. Using a Fourier-plane technique, we have merged both data sets, providing an accurate set of images of the LMC sensitive to structure on scales of 15 pc upward. The spatial dynamic range (2.8 orders of magnitude), velocity resolution (1.649 km s(-1)), brightness temperature sensitivity (2.4 K), and column density sensitivity (7.2 x 10(18) cm(-2) per 1.649 km s(-1) channel) allow for studies of phenomena ranging from the galaxy-wide interaction of the LMC with its close neighbors to the small-scale injection of energy from supernovae and stellar associations into the ISM of the LMC. This paper presents the merged data and size spectrum of H I clouds, which is similar to the typical size spectrum of the holes and shells in the H I distribution. The H I clouds in the LMC have been identified by defining a cloud to be an object composed of all pixels in right ascension, declination, and velocity that are simply connected and that lie above the threshold brightness temperature.

Original language	English
Pages (from-to)	473-486
Journal	Astrophysical Journal Supplement Series
Volume	148
Issue number	2
DOIs	https://doi.org/10.1086/376980
Publication status	Published - 2003

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Kim, S., Staveley-Smith, L., Dopita, M. A., Sault, R. J., Freeman, K. C., Lee, Y., & Chu, Y. H. (2003). A neutral hydrogen survey of the Large Magellanic Cloud: Aperture synthesis and multibeam data combined. Astrophysical Journal Supplement Series, 148(2), 473-486. https://doi.org/10.1086/376980

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title = "A neutral hydrogen survey of the Large Magellanic Cloud: Aperture synthesis and multibeam data combined",

abstract = "Recent H I surveys of the Large Magellanic Cloud (LMC) with the Australia Telescope Compact Array and the Parkes multibeam receiver have focused, respectively, on the small-scale (<20&PRIME;) structure of the interstellar medium (ISM) and the large-scale (>1degrees) structure of the galaxy. Using a Fourier-plane technique, we have merged both data sets, providing an accurate set of images of the LMC sensitive to structure on scales of 15 pc upward. The spatial dynamic range (2.8 orders of magnitude), velocity resolution (1.649 km s(-1)), brightness temperature sensitivity (2.4 K), and column density sensitivity (7.2 x 10(18) cm(-2) per 1.649 km s(-1) channel) allow for studies of phenomena ranging from the galaxy-wide interaction of the LMC with its close neighbors to the small-scale injection of energy from supernovae and stellar associations into the ISM of the LMC. This paper presents the merged data and size spectrum of H I clouds, which is similar to the typical size spectrum of the holes and shells in the H I distribution. The H I clouds in the LMC have been identified by defining a cloud to be an object composed of all pixels in right ascension, declination, and velocity that are simply connected and that lie above the threshold brightness temperature.",

author = "S. Kim and Lister Staveley-Smith and M.A. Dopita and R.J. Sault and K.C. Freeman and Y. Lee and Y.H. Chu",

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AU - Kim, S.

AU - Staveley-Smith, Lister

AU - Dopita, M.A.

AU - Sault, R.J.

AU - Freeman, K.C.

AU - Lee, Y.

AU - Chu, Y.H.

PY - 2003

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AB - Recent H I surveys of the Large Magellanic Cloud (LMC) with the Australia Telescope Compact Array and the Parkes multibeam receiver have focused, respectively, on the small-scale (<20&PRIME;) structure of the interstellar medium (ISM) and the large-scale (>1degrees) structure of the galaxy. Using a Fourier-plane technique, we have merged both data sets, providing an accurate set of images of the LMC sensitive to structure on scales of 15 pc upward. The spatial dynamic range (2.8 orders of magnitude), velocity resolution (1.649 km s(-1)), brightness temperature sensitivity (2.4 K), and column density sensitivity (7.2 x 10(18) cm(-2) per 1.649 km s(-1) channel) allow for studies of phenomena ranging from the galaxy-wide interaction of the LMC with its close neighbors to the small-scale injection of energy from supernovae and stellar associations into the ISM of the LMC. This paper presents the merged data and size spectrum of H I clouds, which is similar to the typical size spectrum of the holes and shells in the H I distribution. The H I clouds in the LMC have been identified by defining a cloud to be an object composed of all pixels in right ascension, declination, and velocity that are simply connected and that lie above the threshold brightness temperature.

U2 - 10.1086/376980

DO - 10.1086/376980

M3 - Article

VL - 148

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EP - 486

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SN - 0067-0049

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