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OH outflows in star-forming regions
The results from a survey for high-velocity OH in molecular outflows in star-forming regions are reported. High-velocity OH was detected in absorption in nine of these regions. When the telescope… Expand
Earth and Mars crater size frequency distribution and impact rates: Theoretical and observational analysis
A framework for the theoretical and analytical understanding of the impact crater-size frequency distribution is developed and applied to observed data from Mars and Earth. The analitical model… Expand
High-velocity OH in absorption : a new tracer of shocked gas in outflows ?
VLA observations of the 1667 MHz transition of OH and of the adjacent continuum toward the galactic star-forming regions NGC 2071 and S255 are reported. In NGC 2071 bipolar, high-velocity OH was… Expand
A Theoretical Model for Mars Crater-Size Frequency Distribution
We present a theoretical and analytical curve with reproduce essential features of the frequency distributions vs. diameter, of the 42,000 crater contained in the Barlow Mars Catalog. The model is… Expand
Possible detection of a high-velocity neutral wind in T Tauri
We report a possible detection of high-velocity H I gas toward T Tau. The 21 cm observations reveal the presence of high-velocity (∼150 km s −1 ) atomic gas having an associated mass of ∼10 −3 M ⊙… Expand
VLA observations of the high-velocity bipolar OH absorption in L1551
The VLA was used to map the high-velocity 1667 MHz OH absorption in L1551. The OH shows the same bipolar geometry seen in CO. The OH absorption is detected along the NW edge of the SW lobe and along… Expand
ANALYTICAL MODEL FOR MARS CRATER-SIZE FREQUENCY DISTRIBUTION
We present a theoretical and analytical curve that reproduces essential features of the frequency distributions vs. diameter of the 42,000 impact craters contained in Barlow’s Mars Catalog. The model… Expand
A Computational Model of Mars Craters-Size Frequency Distribution
In the following paper a computational model is presented that reproduces essential features (slopes) of the cratersize frequency distribution (CSFD) of the 42,283 craters contained in the Barlow's… Expand
Anomalous OH Emission in Galactic Star Forming Regions: a Clue to the Megamaser Phenomenon?
The detection of spatially extended, anomalous OH emission in galactic star-forming regions is reported. This OH emission is similar to, although much weaker than, that produced by extragalactic… Expand
Theoretical Determination of the Impact Crater-Size-Frequency Distribution with Applications to Mars and Earth
Introduction: : A theoretical understanding of the impact crater-size frequency distribution is developed and applied to observed data from Mars and Earth. The analytical model derived gives the… Expand