2005A&A...437L..11G

Query : 2005A&A...437L..11G

2005A&A...437L..11G - Astronomy and Astrophysics, volume 437, L11-14 (2005/7-1)

Temperature fluctuations in HII regions: Ionization by cosmic rays as a key mechanism.

GIAMMANCO C. and BECKMAN J.E.

Abstract (from CDS):

We present a detailed model capable of explaining quantitatively the temperature fluctuations observed in luminous, large HII regions. The model is based on two assumptions which we justify on the basis of observations: that the major fraction of the hydrogen in the clouds that form the HII regions is not photoionized and is essentially HI, this HI is lightly ionized by fluxes of low energy cosmic rays (CR) produced by processes originating in the hot stars which illuminate the regions.

Abstract Copyright: ∼

Journal keyword(s): ISM: general - ISM: HII regions - ISM: clouds - ISM: photon escape - elementary particles - methods: analytical - methods: data analysis

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 604 HII 01 34 32.1 +30 47 01           ~ 586 0
2 M 42 HII 05 35 17 -05 23.4           ~ 4075 0
3 NAME Ori A MoC 05 38 -07.1           ~ 3011 0
4 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2019 2
5 NGC 2363 AG? 07 28 29.59 +69 11 34.3   15.5       ~ 257 1
6 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 564 3
7 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 185 0
8 NGC 5471 EmG 14 04 28.627 +54 23 52.84           ~ 240 1

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