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

Full paper

View the references in ADS

Number of rows : 8

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Sp type	#ref 1850 - 2023	#notes
1	NGC 604	HII	01 34 32.1	+30 47 01		~	578	0
2	M 42	OpC	05 35 17	-05 23.4		~	3982	0
3	NAME Ori A	MoC	05 38	-07.1		~	2913	0
4	RMC 136	Cl*	05 38 42.396	-69 06 03.36		~	1923	1
5	NGC 2363	G	07 28 29.83	+69 11 32.8	15.5	~	253	1
6	NGC 2363A	HII	07 28 42.8	+69 11 21		~	555	3
7	NGC 5461	HII	14 03 40.96	+54 19 02.4		~	180	0
8	NGC 5471	EmG	14 04 28.627	+54 23 52.84		~	237	1

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