117 citations · 746 across the 10 of their papers we have counts for
10 papers
Hubble Space Telescope Survey of Interstellar High-Velocity Si III
Joseph A. Collins, Michael Shull, Mark L. Giroux
We describe an ultraviolet spectroscopic survey of interstellar high-velocity cloud (HVC) absorption in the strong 1206.500 Angstrom line of Si III using the Space Telescope Imagin…
A Large Reservoir of Ionized Gas in the Galactic Halo: Ionized Silicon in High-Velocity and Intermediate-Velocity Clouds
J. Michael Shull, Jennifer R. Jones, Charles W. Danforth +1
The low Galactic halo is enveloped by a sheath of ionized, low-metallicity gas, which can provide a substantial (1 M_sun/yr) cooling inflow to replenish star formation in the disk.…
Metallicity and Ionization in High Velocity Cloud Complex C
J. A. Collins, J. M. Shull, M. L. Giroux
We analyze HST and FUSE ultraviolet spectroscopic data for eleven sight lines passing through the infalling high velocity cloud (HVC) Complex C. These sight lines pass through regi…
Imaging Fabry-Perot Spectroscopy of NGC 5775: Kinematics of the Diffuse Ionized Gas Halo
G. H. Heald, R. J. Rand, R. A. Benjamin +2
We present imaging Fabry-Perot observations of Halpha emission in the nearly edge-on spiral galaxy NGC 5775. We have derived a rotation curve and a radial density profile along the…
Highly Ionized High-Velocity Clouds: Hot Intergalactic Medium or Galactic Halo?
J. A. Collins, J. M. Shull, M. L. Giroux
We use spectroscopic data from HST and FUSE to study the wide range of ionization states of the "highly ionized high-velocity clouds". Studied extensively in OVI absorption, these…
Kinematics of the Ionized Halo of NGC 5775
G. H. Heald, R. J. Rand, R. A. Benjamin +2
Studies of the kinematics of gaseous halos in some spiral galaxies have shown that the rotational velocity of the gas decreases with height above the midplane (z). This vertical ve…