Ultra-compact HII regions and massive star formation
E Churchwell - Annual Review of Astronomy and Astrophysics, 2002 - annualreviews.org
▪ Abstract This review discusses three main topics: evolution to the ultra-compact (UC) state;
the properties of UC HII regions and their environments; and UC HII regions as probes of …
the properties of UC HII regions and their environments; and UC HII regions as probes of …
The morphologies and physical properties of ultracompact H II regions
DOS Wood, E Churchwell - … Series (ISSN 0067-0049), vol. 69 …, 1989 - adsabs.harvard.edu
Seventy-five ultracompact (UC) H II regions were observed with 0.4" resolution at 2 and 6 cm
using the Very Large Array (VLA), and their radio continuum brightness distributions are …
using the Very Large Array (VLA), and their radio continuum brightness distributions are …
Ultracompact H II regions. 2: New high-resolution radio images
S Kurtz, E Churchwell… - … 0067-0049), vol. 91, no. 2 …, 1994 - adsabs.harvard.edu
Radio continuum observations were made of 59 Infrared Astronomy Satellite (IRAS) sources
that have 100 micrometers flux densities greater than or equal to 1000 Jy and far-infrared …
that have 100 micrometers flux densities greater than or equal to 1000 Jy and far-infrared …
[图书][B] Astronomical masers
M Elitzur - 1992 - books.google.com
One of the most spectacular discoveries of molecular astronomy has been the detection of
maser emission. The same radiation that is generated in the laboratory only with elaborate …
maser emission. The same radiation that is generated in the laboratory only with elaborate …
Massive stars: their environment and formation
Cloud environment is thought to play a critical role in determining the mechanism of
formation of massive stars. In this contribution we review the physical characteristics of the …
formation of massive stars. In this contribution we review the physical characteristics of the …
[HTML][HTML] A spectroscopic study of the DR 21 outflow source. III-The CO line emission
RP Garden, M Hayashi, I Gatley… - … Journal, Part 1 …, 1991 - adsabs.harvard.edu
A spectroscopic study of the DR 21 outflow source. III - The CO line emission ADS Classic is
now deprecated. It will be completely retired in October 2019. This page will automatically …
now deprecated. It will be completely retired in October 2019. This page will automatically …
Formaldehyde as a probe of physical conditions in dense molecular clouds
We present a detailed analysis describing the utility of the formaldehyde (H2CO) molecule in
the derivation of the kinetic temperature and spatial density within molecular clouds …
the derivation of the kinetic temperature and spatial density within molecular clouds …
A study of the ground-state hydroxyl maser emission associated with 11 regions of star formation
RA Gaume, RL Mutel - … Series (ISSN 0067-0049), vol. 65, Oct …, 1987 - adsabs.harvard.edu
The results of an arcsecond-resolution study of the four ground-state hydroxyl masers and
15 GHz continuum emission associated with 11 regions of star formation are reported …
15 GHz continuum emission associated with 11 regions of star formation are reported …
Cometary compact H II regions are stellar-wind bow shocks
D Van Buren, MM Mac Low, DOS Wood… - … Journal, Part 1 …, 1990 - adsabs.harvard.edu
Comet-shaped H II regions, like G34. 3+ 0.2, are easily explained as bow shocks created by
wind-blowing massive stars moving supersonically through molecular clouds. The required …
wind-blowing massive stars moving supersonically through molecular clouds. The required …
Dynamical collapse in W51 massive cores: CS (3-2) and CH3CN observations
Q Zhang, PTP Ho, N Ohashi - The Astrophysical Journal, 1998 - iopscience.iop.org
We present interferometric observations of the W51 region at 2 mm with the Nobeyama
Millimeter Array. The 320 MHz band centered at 147 GHz covers transitions of the CS (3–2) …
Millimeter Array. The 320 MHz band centered at 147 GHz covers transitions of the CS (3–2) …