Astrophysical: H II regions

  • Publication
    The diffuse ionized gas in galaxies
    An investigation of the diffuse ionized gas (DIG) and its underlying physical processes is the focal point of this study. We aim to survey the prevalence...
  • Publication
    The Effect of Collisional Enhancement of Balmer Lines on the Determination of the Primordial Helium Abundance
    This paper describes a new determination of the primordial helium abundance (YP), based on the abundance analysis of five metal-poor extragalactic H II regions...
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    The embedded cluster IRAS17136 - 3617 associated with the nebulosity GM24
    Radio, infrared, and optical observations of the embedded infrared cluster IRAS17136 - 3617 are reviewed. The cluster consists of more than 25 stars with a...
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    The environs of the H II region Gum 31
    Aims:We analyze the distribution of the interstellar matter in the environs of the H ii region Gum 31, excited by the open cluster NGC 3324, located in the...
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    The Filling Factor-Radius Relation for 58 H II Regions across the Disk of NGC 6946
    Using the OSIRIS tunable narrowband imager on the 10.4 m GTC (La Palma), we have mapped the SAB(rs)cd galaxy NGC 6946 over a ~7.3 × 7.5 arcmin2 field in the...
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    The Galactic radial abundance gradients of C, N, O, Ne, S, Cl, and Ar from deep spectra of H II regions
    We present a reassessment of the radial abundance gradients of C, N, O, Ne, S, Cl, and Ar in the Milky Way using deep spectra of 33 H II regions gathered from...
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    The galactic wind in the circum-nuclear zone of NGC 6946
    Using the H-II region H-alpha emission detected in high-resolution long slit spectra of the normal spiral NGC 6946 out to 6 kpc from the center, and along 8...
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    The Galaxy-wide Distributions of Mean Electron Density in the H II Regions of M51 and NGC 4449
    Using Advanced Camera for Surveys-Hubble Space Telescope images to yield continuum-subtracted photometric maps in Hα of the Sbc galaxy M51 and the dwarf...
  • Publication
    The giant bubble Hubble III.
    This paper presents the results of the authors' study on the giant (radius = 60 pc) extragalactic H II region Hubble III in NGC 6822. Based on the observational...