Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...641..406a&link_type=abstract
The Astrophysical Journal, Volume 641, Issue 1, pp. 406-409.
Astronomy and Astrophysics
Astronomy
10
Ism: H Ii Regions, Radiative Transfer, Radio Continuum: Ism, Stars: Formation
Scientific paper
We present the analysis of the spectra and sizes of the hypercompact H II regions G34.26+0.15 A and B. We compare their radio continuum spectra and angular sizes with simple models of spherical ionized regions bounded by an inner and an outer radius, with a power-law electron density profile, ne(r)~r-α. The radio continuum spectra and sizes can be reasonably reproduced by both uniform sphere models and shell models with large inner radii of the order of 500 AU. High spatial resolution observations at ν>15 GHz, where the regions are optically thin, could distinguish between the two models. The optically thin radio emission implies, after accounting for dust absorption of ionizing photons, that the ionizing stars of sources A and B have spectral types earlier than main-sequence B1 type.
Avalos Martin
Franco-Hernández Ramiro
Lizano Susana
Moran James Michael
Rodriguez Luis F.
No associations
LandOfFree
Spectra and Sizes of Hypercompact H II Regions 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 Spectra and Sizes of Hypercompact H II Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectra and Sizes of Hypercompact H II Regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1158269