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20 papers · 2 filters
New Observing Techniques
D. L. Welch
The influence of new techniques on the discovery and characterization of pulsating variables has been enormous. In this paper, I will review the methods and results of a number of…
The Effect of Star Formation on Molecular Clouds in Dwarf Irregular Galaxies: IC 10 and NGC 6822
G. R. Petitpas, C. D. Wilson
We have observed the 13CO J=2-1, 12CO J=2-1 and 12CO J=3-2 lines at a few locations in the dwarf irregular galaxies IC 10 and NGC 6822 using the James Clerk Maxwell Telescope. In a…
A sensitive search for CO emission from faint blue galaxies at z~0.5
C. D. Wilson, F. Combes
We have obtained sensitive upper limits on the CO J=2-1 and CO J=3-2 emission lines for five faint blue galaxies with redshifts using the IRAM 30~m telescope. These obs…
G55.0+0.3: A Highly Evolved Supernova Remnant
B. C. Matthews, B. J. Wallace, A. R. Taylor
Multi-frequency analysis has revealed the presence of a new supernova remnant, G55.0+0.3, in the Galactic plane. A kinematic distance of 14 kpc has been measured from HI spectral l…
Dwarf Galaxies in the Coma Cluster. II. Photometry and Analysis
Jeff Secker, William E. Harris, Julia D. Plummer
We study the dwarf galaxy population in the central ~700 arcmin^2 of the Coma cluster, the majority of which are early-type dwarf elliptical (dE) galaxies. Analysis of the statisti…
Dwarf Galaxies in the Coma Cluster. I. Detection, Measurement and Classification Techniques
Jeff Secker, William E. Harris
Deep B- and R-band CCD images of the central ~700 arcmin^2 of the Coma cluster core have been used to measure the dwarf-galaxy population in Coma. In this paper, we describe a newl…