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23 GHz VLBI Observations of SN 2008ax
(EDP Sciences, 2009)
We report on phase-referenced 23 GHz Very-Long-Baseline-Interferometry (VLBI) observations of the type IIb supernova SN 2008ax, made with the Very Long Baseline Array (VLBA) on 2 April 2008 (33 days after explosion). These ...
A Decade of SN 1993J: Discovery of Radio Wavelength Effects in the Expansion Rate
(EDP Sciences, 2009)
We studied the growth of the shell-like radio structure of supernova SN 1993J in M 81 from September 1993 to October 2003 with very-long-baseline interferometry (VLBI) observations at the wavelengths of 3.6, 6, and 18 cm. ...
The Dynamics of Dense Cores in the Perseus Molecular Cloud II: the Relationship between Dense Cores and the Cloud
(Institute of Physics Publishing, Inc., 2010)
We utilize the extensive datasets available for the Perseus molecular cloud to analyze the relationship between the kinematics of small-scale dense cores and the larger structures in which they are embedded. The kinematic ...
Star Formation in the Taurus filament L 1495: from Dense Cores to Stars
(Institute of Physics Publishing, Inc., 2010)
We present a study of dense structures in the L1495 filament in the Taurus Molecular Cloud and examine its star-forming properties. In particular we construct a dust extinction map of the filament using deep near-infrared ...
The Angular Momentum of Magnetized Molecular Cloud Cores: A Two-Dimensional-Three-Dimensional Comparison
(Institute of Physics Publishing, Inc., 2010)
In this work, we present a detailed study of the rotational properties of magnetized and self-gravitating dense molecular cloud cores formed in a set of two very high resolution three-dimensional molecular cloud simulations ...
A Reassessment of the Kinematics of PV Cephei Based on Accurate Proper Motion Measurements
(Universidad Nacional Autónoma de México, 2010)
We present two Very Large Array observations of the pre-main-sequence star PV Cephei, taken with a separation of 10.5 years. These data show that the proper motions of this star are \(\mu_{\alpha} = +10.9 \pm 3.0 \ mas \ ...
Comparative Analysis and Variability of the Jovian X‐Ray Spectra Detected by the Chandra and XMM‐Newton Observatories
(American Geophysical Union, 2010)
Expanding upon recent work, a more comprehensive spectral model based on charge exchange induced X‐ray emission by ions precipitating into the Jovian atmosphere is used to provide new understanding of the polar auroras. ...
Collisions of Trapped Molecules With Slow Beams
(American Physical Society, 2010)
We present a theoretical study of molecular-trap loss induced by collisions with slow atomic beams based on an explicit analysis of collision kinematics in the laboratory frame and a rigorous quantum description of ...
Cold N + NH Collisions in a Magnetic Trap
(American Physical Society, 2011)
We present an experimental and theoretical study of atom-molecule collisions in a mixture of cold, trapped N atoms and NH molecules at a temperature of ∼600 mK. We measure a small N + NH trap loss rate coefficient of ...
Parameter Estimation From Improved Measurements of the Cosmic Microwave Background From QUaD
(IOP Publishing, 2010)
We evaluate the contribution of cosmic microwave background (CMB) polarization spectra to cosmological parameter constraints. We produce cosmological parameters using high-quality CMB polarization data from the ground-based ...