Elemental Abundances in GRB Afterglows and High‐Redshift DLAs. [AIP Conference Proceedings 990, 499 (2008)]. Bryan E. Penprase, Wallace LW Sargent, Irene Toro Martinez, Jason X. Prochaska, Daniel Jay Beeler. Abstract. ...
Page 1. THE ASTROPHYSICAL JOURNAL, 535 : 293»297, 2000 May 20 2000. The American Astronomical Society. All rights reserved. Printed in USA ( ULTRAHIGH RESOLUTION SPECTROSCOPY OF A NEARBY HIGH-LATITUDE ...
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Page 1. 11{ l'l{OI'I';llrJ'll'X OF GA I, ACYJ'lC Cll{}ilJS NI':AI{. ~'1111 I'OI,AI{ CA1'S l]l{YAN II;, l) II; NI'NAS II;] ANI) Gl:ORGII; II II; I,OIJ 11'A (/', (dld hf,g ]oo-t~, l'[is[i&jlc+ (:A 91 12S AI IS'J'ILAC'JI W C }JICmIIt a systmIIlatic study of tlIe ...
Measuring Star Forming Activities in The Antennae: Region‐by‐region. [AIP Conference Proceedings 761, 433 (2005)]. Zhong Wang, Bryan E. Penprase, Giovanni G. Fazio, Steve P. Willner, Mathew LN Ashby, Howard A. Smith. Abstract. ...
The majority of Near Earth Objects (NEOs) originated in collisions between bodies in the main asteroid belt and have found their way into near-Earth space via complex and little understood dynamical interactions. This transport of... more
The majority of Near Earth Objects (NEOs) originated in collisions between bodies in the main asteroid belt and have found their way into near-Earth space via complex and little understood dynamical interactions. This transport of material from the main belt into the inner Solar ...
CAMERA is an autonomous laser guide star adaptive optics system designed for small aperture telescopes. This system is intended to be mounted permanently on such a telescope to provide large amounts.
To investigate the distance and linear dimensions of the Draco Molecular Cloud (MBM 41) we have obtained new CCD photometry for a selection of stars in 20 selected areas toward the cores of the cloud. The selected areas were chosen to... more
To investigate the distance and linear dimensions of the Draco Molecular Cloud (MBM 41) we have obtained new CCD photometry for a selection of stars in 20 selected areas toward the cores of the cloud. The selected areas were chosen to coincide with the brightest IRAS emitting portions of the cloud, and also with dense 12CO emission from the cloud. For each area we have obtained V and B photometry, and a subset of the fields has also been observed through a narrow-band Hα filter and in the U band. We present V and B magnitudes for the 362 stars which have high-quality observations in both bands. In addition we have derived star counts in the V band using a larger sample of 465 stars, which is complete to a limiting magnitude of V=19.0. The star counts were compared to a galactic model from Bahcall & Soneira (\cite{bah2}). Using the galactic model of star counts, slightly modified to include the effects of a cloud of arbirary distance and extinction, we find a best fit to our data wit...
We report new spectroscopic and photometric observations of the Draco Molecular Cloud, one of the most interesting and distant known high galactic latitude molecular clouds. We have detected photometric reddening and optical Na I D... more
We report new spectroscopic and photometric observations of the Draco Molecular Cloud, one of the most interesting and distant known high galactic latitude molecular clouds. We have detected photometric reddening and optical Na I D absorption lines from a large sample of stars, using telescopes at Palomar, and La Palma. By estimating the expected starcounts using a model of the galactic halo and comparing with our observed star counts we derive a photometric distance estimate of 1100 pc, with a best fit of 2.0 < Av < 3.0 magnitudes. The spectroscopic results allow us to estimate the distance to the cloud by using spectroscopic parallaxes for our sample of 15 stars with high dispersion spectra, and the spectroscopic distance is consistent with the photometric results, giving a distance of approximately 1000 pc. We also report some new results on other molecular clouds and high latitude features observed using high dispersion spectroscopy to reveal the distance and kinematics of a sample of high galactic latitude clouds.
