Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008arep...52..184m&link_type=abstract
Astronomy Reports, Volume 52, Issue 3, pp.184-200
Astronomy and Astrophysics
Astronomy
98.58.Hf, 98.56.Wm, Hii Regions, Emission And Reflection Nebulae, Dwarf Galaxies
Scientific paper
A new method for determining the physical parameters, ionizing Lyman continua (Lyc) and chemical compositions of HII regions in blue compact dwarf galaxies is developed. We propose our modified NLEHII method, which is independent on the initial mass function (IMF) for the determination of the Lyc spectra of the ionizing nuclei of HII regions. This method is based on the assumptions of ionization-recombination and thermal equilibria in the HII regions. It is used to calculate the Lyc spectra for optimization photoionization models (OPhMs) of HII regions in an iterative way, since the Lyc spectrum depends on parameters that can be found from photoionization modeling. We apply this method to determine the chemical composition of an HII region in the blue compact dwarf galaxy SBS 0940+544 and, in particular, the helium mass fraction Y.
Holovatyy Volodymyr V.
Izotov Yu. I.
Melekh Bohdan Ya.
No associations
LandOfFree
Determination of the physical parameters, Lyman continua, and chemical compositions of HII regions in blue compact dwarf galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Determination of the physical parameters, Lyman continua, and chemical compositions of HII regions in blue compact dwarf galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the physical parameters, Lyman continua, and chemical compositions of HII regions in blue compact dwarf galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1039230