SIMBAD references

2001AJ....122.1788I - Astron. J., 122, 1788-1795 (2001/October-0)

Lyman continuum extinction by dust in H II regions of galaxies.


Abstract (from CDS):

We examine Lyman continuum extinction (LCE) in H II regions by comparing infrared fluxes of 49 H II regions in the Galaxy, M31, M33, and the Large Megellanic Cloud with estimated production rates of Lyman continuum photons. A typical fraction of Lyman continuum photons that contribute to hydrogen ionization in the H II regions of three spiral galaxies is ≲50%. The fraction may become smaller as the metallicity (or dust-to-gas ratio) increases. We examine the LCE effect on estimated star formation rates of galaxies. The correction factor for the Galactic dust-to-gas ratio is 2-5.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - Galaxies: ISM - ISM: H II Regions - Infrared Radiation - Radio Continuum - Stars: Formation

CDS comments: table 1 : G343.4-0.4 misprint for GAL 353.4-0.4

Simbad objects: 67

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