H. A. Ford

Publications (3)0 Total impact

• Source

  Available from: Mark Raymond Calabretta

  Article: GASS: The Parkes Galactic All-Sky Survey. I. Survey Description, Goals, and Initial Data Release

  N. M. McClure-Griffiths, D. J. Pisano, M. R. Calabretta, H. A. Ford, F. J. Lockman, L. Staveley-Smith, P. M. W. Kalberla, J. Bailin, L. Dedes, S. Janowiecki, B. K. Gibson, T Murphy, H. Nakanishi, K. Newton-McGee
  [show abstract] [hide abstract]
  ABSTRACT: The Parkes Galactic All-Sky Survey (GASS) is a survey of Galactic atomic hydrogen (HI) emission in the Southern sky covering declinations $\delta \leq 1^{\circ}$ using the Parkes Radio Telescope. The survey covers $2\pi$ steradians with an effective angular resolution of ~16', at a velocity resolution of 1.0 km/s, and with an rms brightness temperature noise of 57 mK. GASS is the most sensitive, highest angular resolution survey of Galactic HI emission ever made in the Southern sky. In this paper we outline the survey goals, describe the observations and data analysis, and present the first-stage data release. The data product is a single cube at full resolution, not corrected for stray radiation. Spectra from the survey and other data products are publicly available online. Comment: 35 pages, 16 figures, accepted for publication in ApJS. Full resolution version available at ftp://ftp.atnf.csiro.au/pub/people/nmcclure/papers/GASS.1.ps.gz
  01/2009;
• Source

  Available from: Mark Raymond Calabretta

  Article: An Interaction of a Magellanic Leading Arm High Velocity Cloud with the Milky Way Disk

  N. M. McClure-Griffiths, L. Staveley-Smith, F. J. Lockman, M. R. Calabretta, H. A. Ford, P. M. W. Kalberla, T Murphy, H. Nakanishi, D. J. Pisano
  [show abstract] [hide abstract]
  ABSTRACT: The Leading Arm of the Magellanic System is a tidally formed HI feature extending $\sim 60\arcdeg$ from the Magellanic Clouds ahead of their direction of motion. Using atomic hydrogen (HI) data from the Galactic All Sky-Survey (GASS), supplemented with data from the Australia Telescope Compact Array, we have found evidence for an interaction between a cloud in the Leading Arm and the Galactic disk where the Leading Arm crosses the Galactic plane. The interaction occurs at velocities permitted by Galactic rotation, which allows us to derive a kinematic distance to the cloud of 21 kpc, suggesting that the Leading Arm crosses the Galactic Plane at a Galactic radius of $R\approx 17$ kpc. Comment: 14 pages, 5 figures, accepted to Astrophysical Journal Letters. Full resolution version available at ftp://ftp.atnf.csiro.au/pub/people/nmcclure/papers/LeadingArm_apjl.pdf
  12/2007;
• Source

  Available from: Mark Raymond Calabretta

  Article: Gass: The Parkes Galactic All-Sky Survey. II. Stray-radiation correction and second data release

  P. M. W. Kalberla, N. M. McClure-Griffiths, D. J. Pisano, M. R. Calabretta, H. A. Ford, F. J. Lockman, L. Staveley-Smith, J. Kerp, B. Winkel, T Murphy, K. Newton-McGee
  http://dx.doi.org/10.1051/0004-6361/200913979.