2001A&A...376.1040A


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET11:49:27

2001A&A...376.1040A - Astronomy and Astrophysics, volume 376, 1040-1053 (2001/9-4)

Modeling far-infrared emission from the HII region S125.

AANNESTAD P.A. and EMERY R.J.

Abstract (from CDS):

We present ISO-LWS 45-180µm spectral observations at 17 positions in the HII region S125. We model, as one integrated region, the far-IR continuum emission as well as the observed emissions in the radio continuum and in the 21cm line, comparing two different model density distributions and several silicate-carbon dust models. The dust in the HII region is found to be severely depleted, while the dust in the PDR region has a normal dust/gas ratio, but with a major fraction of the mass in the form of the very small dust grains. Silicate-carbon dust must have strongly enhanced far-IR emissivities to be consistent with the observed spectra. It is found that the ionizing star alone does not power the infrared luminosity, but that additional sources of far-IR radiation must be present in a ring-like region surrounding the HII region. In this region the star accounts for about 50% of the observed emission. For most positions, the additional emission peaks at a wavelength around 70µm.

Abstract Copyright:

Journal keyword(s): HII regions - ISM: individual objects: S125 - ISM: dust, extinction - infrared: ISM

Errata: Erratum vol. 387, p. 294 (2002)

Simbad objects: 3

goto Full paper

goto View the reference in ADS

Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 IC 5146 OpC 21 53 24 +47 16.0           ~ 396 2
2 BD+46 3474 ** 21 53 28.8522000915 +47 15 59.829571300 10.27 10.37 9.63 9.42   B1V 50 0
3 SH 2-125 HII 21 53 30 +47 21.2           ~ 38 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...376.1040A and select 'bookmark this link' or equivalent in the popup menu


2021.03.02-11:49:27

© Université de Strasbourg/CNRS

    • Contact