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- W2136861231 abstract "We have re-analyzed continuum and recombination lines radio data available in the literature in order to derive the luminosity function (LF) of Galactic H ii regions. The study is performed by considering the first and fourth Galactic quadrants independently. We estimate the completeness level of the sample in the fourth quadrant at 5 Jy, and the one in the first quadrant at 2 Jy. We show that the two samples (fourth or first quadrant) include, as well as giant and supergiant H ii regions, a significant number of subgiant sources. The LF is obtained, in each Galactic quadrant, with a generalized Schmidt's estimator using an effective volume derived from the observed spatial distribution of the considered H ii regions. The re-analysis also takes advantage of recently published ancillary absorption data allowing to solve the distance ambiguity for several objects. A single power-law fit to the LFs retrieves a slope equal to −2.23 ± 0.07 (fourth quadrant) and to −1.85 ± 0.11 (first quadrant). We also find marginal evidence of a luminosity break at Lknee = 1023.45 erg s−1 Hz−1 for the LF in the fourth quadrant. We convert radio luminosities into equivalent Hα and Lyman continuum luminosities to facilitate comparisons with extragalactic studies. We obtain an average total H ii regions Lyman continuum luminosity of 0.89 ± 0.23 × 1053 s−1, corresponding to 30% of the total ionizing luminosity of the Galaxy." @default.
- W2136861231 created "2016-06-24" @default.
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- W2136861231 date "2009-08-18" @default.
- W2136861231 modified "2023-10-16" @default.
- W2136861231 title "RE-ANALYSIS OF THE RADIO LUMINOSITY FUNCTION OF GALACTIC H II REGIONS" @default.
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- W2136861231 doi "https://doi.org/10.1088/0004-637x/702/2/1036" @default.
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