Results 41 to 50 of about 1,861,445 (361)
Carbon and oxygen in H II regions of the Magellanic Clouds: abundance discrepancy and chemical evolution [PDF]
, 2017 We present C and O abundances in the Magellanic Clouds derived from deep spectra of HII regions. The data have been taken with the Ultraviolet-Visual Echelle Spectrograph at the 8.2-m VLT. The sample comprises 5 HII regions in the Large Magellanic Cloud (
L. Cipriano +15 more
semanticscholar +1 more source
Non-thermal emission from cosmic rays accelerated in H II regions [PDF]
Astronomy & Astrophysics, 2019 Context. Radio observations at metre-centimetre wavelengths shed light on the nature of the emission of H II regions. Usually this category of objects is dominated by thermal radiation produced by ionised hydrogen, namely protons and electrons.
M. Padovani +4 more
semanticscholar +1 more source
Structure and expansion law of H ii regions in structured molecular clouds [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present radiation-magnetohydrodynamic simulations aimed at studying evolutionary properties of H ii regions in turbulent, magnetized, and collapsing molecular clouds formed by converging flows in the warm neutral medium.
Manuel Zamora-Avil'es +8 more
semanticscholar +1 more source
Diffuse continuum transfer in H���ii regions [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 12 pages, 7 figures, to be published in ...
Williams, R. J. R., Henney, W. J.
openaire +2 more sources
Ionized gas kinematics in bipolar H ii regions [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 14 pages and 9 figures.
Hannah S Dalgleish +5 more
openaire +6 more sources
Massive Star Formation in the Ultraviolet Observed with the Hubble Space Telescope
Galaxies, 2020 Spectroscopic observations of a massive star formation in the ultraviolet and their interpretation are reviewed. After a brief historical retrospective, two well-studied resolved star clusters and the surrounding H II regions are introduced: NGC 2070 in ...
Claus Leitherer
doaj +1 more source
The Astrophysical Journal, 2023 The paper presents an analysis of multiwavelength data of a nearby star-forming site, the IC 5146 dark streamer ( d ∼ 600 pc), which has been treated as a single and long filament, fl .
L. K. Dewangan +7 more
doaj +1 more source
THE WISE CATALOG OF GALACTIC H ii REGIONS [PDF]
, 2013 Using data from the all-sky Wide-Field Infrared Survey Explorer (WISE) satellite, we made a catalog of over 8000 Galactic H ii regions and H ii region candidates by searching for their characteristic mid-infrared (MIR) morphology.
L. Anderson +8 more
semanticscholar +1 more source
The Astrophysical JournalWe employ observations of the 205 μ m [N ii ] fine structure (FS) line and radio recombination line (RRL) emission to derive the electron density in 10 well-known H ii regions. The combination of these two spectral lines (the RRL–FS line method) provides
Paul. F. Goldsmith +4 more
doaj +1 more source
The Detection of Higher-order Millimeter Hydrogen Recombination Lines in the Large Magellanic Cloud
The Astrophysical Journal, 2023 We report the first extragalactic detection of the higher-order millimeter hydrogen recombination lines (Δ n > 2). The γ -, ϵ -, and η -transitions have been detected toward the millimeter continuum source N 105–1 A in the star-forming region N 105 in ...
Marta Sewiło +12 more
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