49 citations · 167 across the 6 of their papers we have counts for
6 papers
Time-Variable Radio Recombination Line Emission in W49A
C. G. De Pree, D. J. Wilner, L. E. Kristensen +8
We present new Jansky Very Large Array (VLA) images of the central region of the W49A star-forming region at 3.6~cm and at 7~mm at resolutions of 0\farcs15 (1650 au) and 0\farcs04…
Flux Density Variations at 3.6 cm in the Massive Star-Forming Region W49A
C. G. De Pree, R. Galván-Madrid, W. M. Goss +8
A number of ultracompact H II regions in Galactic star forming environments have been observed to vary significantly in radio flux density on timescales of 10-20 years. Theory pred…
Morphologies of Ultracompact HII Regions in W49A and Sgr B2: Prevalence of Shells and a Modified Classification Scheme
C. G. De Pree, D. J. Wilner, J. Deblasio +2
We have used Very Large Array (VLA) observations of the massive star forming regions W49A and Sgr B2, obtained with resolutions from 2\farcs0 to 0\farcs04, to classify the morpholo…
An 8.5 GHz Arecibo survey of Carbon Recombination Lines toward Ultra-compact \HII regions: Physical properties of dense molecular material
D. Anish Roshi, Dana. S. Balser, T. M. Bania +2
We report here on a survey of carbon recombination lines (RLs) near 8.5 GHz toward 17 ultra-compact \HII regions (\UCHII s). Carbon RLs are detected in 11 directions, indicating th…
Water Masers in W49 North and Sagittarius B2
E. J. McGrath, W. M. Goss, C. G. De Pree
Using the Very Large Array (VLA) of the National Radio Astronomy Observatory in the A and B configurations, we have obtained simultaneous high resolution observations of both the 2…
Broad Recombination Line Objects in W49N on 600 AU Scales
C. G. De Pree, D. J. Wilner, A. J. Mercer +3
High resolution 7 mm observations of the W49N massive star forming region have detected recombination line emission from the individual ultracompact (UC) HII regions on 50 milliarc…