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astronomy & astrophysics (413) 413
ultracompact hii-regions (371) 371
stars: formation (257) 257
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ism: molecules (125) 125
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mass (28) 28
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resolution (26) 26
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ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 12/2007, Volume 671, Issue 1, pp. 518 - 535
We present a method for simulating the evolution of H II regions driven by point sources of ionizing radiation in magnetohydrodynamic media, implemented in the... 
MAGNETIC IONIZATION FRONTS | radiative transfer | MHD | STAR-FORMATION | HYDRODYNAMICS | OB ASSOCIATIONS | DYNAMICAL EXPANSION | instabilities | HII regions | DISSOCIATION FRONTS | INTERSTELLAR CLOUDS | RADIATIVE-TRANSFER | TRANSPORT | ULTRACOMPACT | ISM : kinematics and dynamics | ASTRONOMY & ASTROPHYSICS | methods : numerical
Journal Article
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, ISSN 0035-8711, 09/2007, Volume 380, Issue 1, pp. 369 - 373
We have used recent radiative transfer solutions for cavity-centred shells to investigate the prevalence of density gradients in Galactic ultra-compact H II... 
IRAS POINT SOURCES | H-II REGIONS | NEBULAE | MORPHOLOGIES | HII regions | RADIO-CONTINUUM | ULTRACOMPACT | CATALOG | ASTRONOMY & ASTROPHYSICS | radio continuum : ISM | DYNAMICS | SUPERBUBBLES | WIND BUBBLES
Journal Article
Revista Mexicana de Astronomia y Astrofisica, ISSN 0185-1101, 2012, Volume 48, Issue 2, pp. 199 - 207
Ultracompact HII regions are in a regime of approximate pressure balance with the surrounding, dense molecular clouds. In this paper, we apply a newly... 
ISM: evolution | Stars: formation | HII regions | ISM: kinematics and dynamics | H-II REGIONS | O-TYPE | evolution - ISM | formation | B STARS | GRAVITY | H II regions - ISM | ULTRACOMPACT | STELLAR WIND | MODELS | kinematics and dynamics - stars | ASTRONOMY & ASTROPHYSICS | EXPANSION | DIFFUSE NEBULAE | EMISSION
Journal Article
ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 10/2000, Volume 542, Issue 2, pp. L143 - L146
We report the density structure of the ultracompact (UC) H II regions G35.20-1.74, G9.62+0.19-E, and G75.78+0.34-H2O. The density profiles are derived from... 
MASSIVE STARS | AMMONIA | H-II REGIONS | HII regions | PHOTOEVAPORATION | DARK CLOUDS | G9.62+0.19 | ULTRACOMPACT | EVOLUTION | ISM : clouds | DISKS | ASTRONOMY & ASTROPHYSICS | radio continuum : ISM | EMISSION
Journal Article
ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 03/2005, Volume 621, Issue 1, pp. 359 - 371
We study the evolution of H II regions inside accreting hot molecular cores (HMCs). The H II regions are being pushed by a strong stellar wind from a massive... 
THERMAL CONDUCTION | LOSS RATES | H-II REGIONS | hydrodynamics | INTERSTELLAR-MEDIUM | HII regions | ULTRACOMPACT | stars : formation | ISM : clouds | ASTRONOMY & ASTROPHYSICS | DENSE CORES | X-RAY | STELLAR WINDS | MASSIVE STAR-FORMATION | RADIATIVE SHOCKS
Journal Article
ASTRONOMICAL JOURNAL, ISSN 0004-6256, 05/2002, Volume 123, Issue 5, pp. 2574 - 2582
We present results of high-sensitivity, high-resolution, multifrequency VLA observations toward the star-forming complex NGC 6334. We find that the H II region... 
stars : early-type | MOLECULAR CLOUDS | radio continuum | H-II-REGIONS | HII regions | O-TYPE STARS | INFRARED OBSERVATIONS | ULTRACOMPACT | stars : formation | ASTRONOMY & ASTROPHYSICS | NGC-6334 COMPLEX | GHZ | METHANOL MASERS | MASS-LOSS | EMISSION
Journal Article
ASTRONOMY & ASTROPHYSICS, ISSN 1432-0746, 09/2009, Volume 504, Issue 2, pp. 415 - 427
Context. Thanks to its excellent 5100 m high site in Chajnantor, the Atacama Pathfinder Experiment (APEX) systematically explores the southern sky at... 
PHYSICAL-PROPERTIES | ULTRACOMPACT HII-REGIONS | surveys | H-II REGIONS | INFRARED-DARK CLOUDS | FORMING REGIONS | DENSE MOLECULAR CLOUDS | ISM: structure | DUST CONTINUUM EMISSION | MASSIVE-STAR-FORMATION | submillimeter | stars: formation | dust, extinction | Galaxy: disk | GALACTIC PLANE | ASTRONOMY & ASTROPHYSICS | C2D LEGACY CLOUDS
Journal Article
Astrophysics and Space Science, ISSN 0004-640X, 7/2000, Volume 272, Issue 1, pp. 169 - 179
Here we review some recent results on the observed properties of UCH IIregions, and on the new class of Super-ultra-compact H II regions, and describe the... 
Physics | Astronomy | CORES | RADIO-CONTINUUM | ULTRACOMPACT | MOLECULAR CLOUDS | IRAS POINT SOURCES | ASTRONOMY & ASTROPHYSICS | H-II REGIONS | STAR-FORMATION | STELLAR WINDS | PI REGIONS | MORPHOLOGIES | Evolution | Star & galaxy formation | Astrophysics | H II regions | Clouds | Ionization | Shock fronts | Shells | Instability | Clumps | Density
Journal Article
ASTRONOMY & ASTROPHYSICS, ISSN 1432-0746, 04/2019, Volume 624
Context. The earliest phases of the evolution of a massive star are closely related to the developement of an HII region. Hypercompact HII regions are the most... 
stars: early-type | ULTRACOMPACT | ASTRONOMY & ASTROPHYSICS | H-II REGION | STAR-FORMATION | RADIO | ACCRETION | VLA | ISM: individual objects: G24.78+0.08 | stars: winds, outflows | HII regions
Journal Article
ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 09/2019, Volume 883, Issue 1, p. 102
Using a suite of radiation hydrodynamic simulations of star cluster formation in turbulent clouds, we study the escape fraction of ionizing (Lyman continuum)... 
NEUTRAL ATOMIC PHASES | FORMATION RATES | DUST | REIONIZATION | ULTRACOMPACT HII-REGIONS | ASTRONOMY & ASTROPHYSICS | CARINA-NEBULA | DIFFUSE IONIZED-GAS | INTERSTELLAR-MEDIUM | GALAXIES | MILKY-WAY
Journal Article
Astronomy and Astrophysics, ISSN 0004-6361, 2012, Volume 544, p. A146
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 11/2011, Volume 417, Issue 4, pp. 2500 - 2553
We present the kinematic distance ambiguity resolutions of over 400 6.7-GHz methanol masers. Using the data sets of the International Galactic Plane Survey we... 
surveys | stars: formation | masers | STELLAR ORBITS | MOLECULAR CLOUDS | ULTRACOMPACT HII-REGIONS | STAR-FORMATION | INNER GALAXY | GALACTIC PLANE SURVEY | KINEMATIC DISTANCES | GENERAL CATALOG | ASTRONOMY & ASTROPHYSICS | MILKY-WAY | TRIGONOMETRIC PARALLAXES | Methanol
Journal Article
ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 12/2015, Volume 815, Issue 2, p. 123
We have recently published observations of significant flux density variations at 1.3 cm in H II regions in the star-forming regions Sgr B2 Main and North. To... 
MASSIVE STARS | CONTINUUM OBSERVATIONS | radio continuum: ISM | H II Regions | FRAGMENTATION | SAGITTARIUS B2 | stars: formation | ULTRACOMPACT | ASTRONOMY & ASTROPHYSICS | IONIZED-GAS | SCALES | ACCRETION | HII-REGIONS
Journal Article
The Astrophysical Journal, ISSN 0004-637X, 09/2009, Volume 702, Issue 2, pp. 1615 - 1647
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2011, Volume 416, Issue 3, pp. 1764 - 1821
Journal Article
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2013, Volume 431, Issue 2, pp. 1752 - 1776
Journal Article
The Astrophysical Journal, ISSN 0004-637X, 01/2009, Volume 690, Issue 1, pp. 706 - 719
We resolve the kinematic distance ambiguity for 266 inner Galaxy H II regions out of a sample of 291 using existing H I and (CO)-C-13 sky surveys. Our sample... 
H II regions | ISM: molecules | Stars: formation | Radio lines: ISM | MOLECULAR CLOUDS | ROTATION CURVE | ULTRACOMPACT HII-REGIONS | STAR-FORMATION | PLANE SURVEY | NARROW SELF-ABSORPTION | stars: formation | DARK CLOUDS | radio lines: ISM | RADIO RECOMBINATION LINES | ASTRONOMY & ASTROPHYSICS | RING SURVEY | MILKY-WAY
Journal Article