Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane (2008)
Robitaille, Thomas P., Meade, Marilyn R., Babler, Brian L., Whitney, Barbara A., Johnston, Katharine G., Indebetouw, Remy, ...
We present a highly reliable flux-limited census of 18,949 point sources in the Galactic mid-plane that have intrinsically red mid-infrared colors. These sources were selected from the Spitzer Space...
Interstellar Weather Vanes: GLIMPSE Mid-Infrared Stellar-Wind Bowshocks in M17 and RCW49 (2008)
Povich, Matthew S., Benjamin, Robert A., Whitney, Barbara A., Babler, Brian L., Indebetouw, Remy, Meade, Marilyn R., ...
We report the discovery of six infrared stellar-wind bowshocks in the Galactic massive star formation regions M17 and RCW49 from Spitzer GLIMPSE (Galactic Legacy Infrared Mid-Plane Survey...
The Turbulent Warm Ionized Medium: Emission Measure Distribution and MHD Simulations (2008)
Hill, Alex S., Benjamin, Robert A., Kowal, Grzegorz, Reynolds, Ronald J., Haffner, L. Matthew, Lazarian, Alex
We present an analysis of the distribution of H-alpha emission measures for the warm ionized medium (WIM) of the Galaxy using data from the Wisconsin H-Alpha Mapper (WHAM) Northern Sky Survey. Our...
Smith's Cloud: A High-velocity Cloud Colliding with the Milky Way (2008)
Lockman, Felix J., Benjamin, Robert A., Heroux, A. J., Langston, Glen I.
New 21cm HI observations made with the Green Bank Telescope show that the high-velocity cloud known as Smith's Cloud has a striking cometary appearance and many indications of interaction with the...
Infrared Spectroscopy of the Diffuse Ionized Halo of NGC 891 (2008)
Rand, Richard J., Wood, Kenneth, Benjamin, Robert A.
We present infrared spectroscopy from the Spitzer Space Telescope at one disk position and two positions at a height of 1 kpc from the disk in the edge-on spiral NGC 891, with the primary goal of...
Vertically Extended Neutral Gas in the Massive Edge-on Spiral NGC 5746 (2008)
Rand, Richard J., Benjamin, Robert A.
We present Very Large Array 21-cm observations of the massive edge-on spiral galaxy NGC 5746. This galaxy has recently been reported to have a luminous X-ray halo, which has been taken as evidence of...
We present a list of 109 pulsars with independent distance information compiled from the literature. Since the compilation of Frail & Weisberg, there are 35 pulsars with new distance estimates...
RevMexAA (Serie de Conferencias), 9, 256-258 (2000) (2007)
Vertical Shear Of, Robert A. Benjamin
The detection of UV absorption, 21 cm, H and other diuse optical emission lines from gas up to ten kiloparsecs above the plane of the Milky Way and other galaxies provides the rst opportunity to...
VERTICAL SHEAR OF THE GALACTIC INTERSTELLAR MEDIUM (2007)
La detección de absorción en UV, 21 cm, Hα y otras líneas difusas de emisión en el óptico de gas de hasta 10 kpc sobre el plano de la Vía Láctea y de otras galaxias, permite estudiar la...
The Milky Way's Kiloparsec Scale Wind: A Hybrid Cosmic-Ray and Thermally Driven Outflow (2007)
Everett, John E., Zweibel, Ellen G., Benjamin, Robert A., McCammon, Dan, Rocks, Lindsay, Gallagher, John S., ...
We apply a wind model, driven by combined cosmic-ray and thermal-gas pressure, to the Milky Way, and show that the observed Galactic diffuse soft X-ray emission can be better explained by a wind than...
Integral Field Unit Observations of NGC 4302: Kinematics of the Diffuse Ionized Gas Halo (2007)
Heald, George H., Rand, Richard J., Benjamin, Robert A., Bershady, Matthew A.
We present moderate resolution spectroscopy of extraplanar diffuse ionized gas (EDIG) emission in the edge-on spiral galaxy NGC 4302. The spectra were obtained with the SparsePak integral field unit...
Density Distribution of the Warm Ionized Medium (2007)
Hill, Alex S., Reynolds, Ronald J., Benjamin, Robert A., Haffner, L. Matthew
Observations of Halpha emission measures and pulsar dispersion measures at high Galactic latitude (|b| > 10 deg) provide information about the density and distribution of the diffuse warm ionized...
Vertical shear of the galactic interstellar medium (2006)
Vertical shear of the galactic interstellar medium
Integral Field Unit Observations of NGC 891: Kinematics of the Diffuse Ionized Gas Halo (2006)
Heald, George H., Rand, Richard J., Benjamin, Robert A., Bershady, Matthew A.
We present high and moderate spectral resolution spectroscopy of diffuse ionized gas (DIG) emission in the halo of NGC 891. The data were obtained with the SparsePak integral field unit at the WIYN...
First GLIMPSE Results on the Stellar Structure of the Galaxy (2005)
Benjamin, Robert A., Churchwell, E., Babler, B. L., Indebetouw, R., Meade, M. R., Whitney, B. A., ...
The GLIMPSE (Galactic Legacy Mid-Plane Survey Extraordinaire) Point Source Catalog of ~ 30 million mid-infrared sources towards the inner Galaxy, 10 < |l| < 65 degrees and |b| < 1 degree, was used to...
GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy (2003)
Benjamin, Robert A., Churchwell, E., Babler, Brian L., Bania, T. M., Clemens, Dan P., Cohen, Martin, ...
GLIMPSE (Galactic Legacy Infrared Mid-Plane Survey Extraordinaire), a SIRTF Legacy Science Program, will be a fully sampled, confusion-limited infrared survey of the inner two-thirds of the Galactic...
Radiative Transfer Effects in He I Emission Lines (2002)
Benjamin, Robert A., Skillman, Evan D., Smits, Derck P.
We consider the effect of optical depth of the 2 ^{3}S level on the nebular recombination spectrum of He I for a spherically symmetric nebula with no systematic velocity gradients. These...
The Evolution of Adiabatic Supernova Remnants in a Turbulent, Magnetized Medium (2001)
Balsara, Dinshaw, Benjamin, Robert A., Cox, Donald P.
(Abridged) We present the results of three dimensional calculations for the MHD evolution of an adiabatic supernova remnant in both a uniform and turbulent interstellar medium using the RIEMANN...
A Useful Approximation to the Cooling Coefficient of Trace Elements (2001)
Benjamin, Robert A., Benson, Bradford A., Cox, Donald P.
Radiative cooling is an important ingredient in hydrodynamical models involving evolution of high temperature plasmas. Unfortunately, calculating an accurate cooling coefficient generally requires...
A Re-examination of the Distribution of Galactic Free Electrons (2001)
Gomez, Gilberto C., Benjamin, Robert A., Cox, Donald P.
We present a list of 109 pulsars with independent distance information compiled from the literature. Since the compilation of Frail & Weisberg, there are 35 pulsars with new distance estimate and 25...
A Straight and Narrow Ionized Filament (2001)
McCullough, Peter R., Benjamin, Robert A.
We report the discovery of a extremely narrow, extremely linear, ionized filament. The filament is 2.5 degrees long and has an H$\alpha$ surface brightness of 0.5 rayleighs. The filament is...
Vertical shear of the galactic interstellar medium (2000)
The detection of UV absorption, 21 cm, H and other di use optical emis- sion lines from gas up to ten kiloparsecs above the plane of the Milky Way and other galaxies provides the rst opportunity to...
Terminal Velocity Infall in QSO Absorption Line Halos (1998)
We explore the hypothesis that clouds detected in quasar absorption line systems are falling at a terminal velocity toward the center of high redshift gaseous galactic halos. Since both the...
What is the Reynolds number of the Reynolds' Layer? (1998)
Several authors have now suggested that some interstellar clouds above the plane of the Galaxy are interacting with the Reynolds' layer, the warm ionized gas extending well above (H~910 pc) the...
Improving Predictions for Helium Emission Lines (1998)
Benjamin, Robert A., Skillman, Evan D., Smits, Derck P.
We have combined the detailed He I recombination model of Smits with the collisional transitions of Sawey & Berrington in order to produce new accurate helium emissivities that include the effects of...
High Velocity Rain: The Terminal Velocity of Model of Galactic Infall (1996)
Benjamin, Robert A., Danly, Laura
A model is proposed for determining the distances to falling interstellar clouds in the galactic halo by measuring the cloud velocity and column density and assuming a model for the vertical density...