2013MNRAS.433.2368M

Query : 2013MNRAS.433.2368M

2013MNRAS.433.2368M - Mon. Not. R. Astron. Soc., 433, 2368-2379 (2013/August-2)

Cosmic ray-ice interaction studied by radiolysis of 15 K methane ice with MeV O, Fe and Zn ions.

MEJIA C.F., DE BARROS A.L.F., BORDALO V., DA SILVEIRA E.F., BODUCH P., DOMARACKA A. and ROTHARD H.

Abstract (from CDS):

Methane (CH4) ice is found in the interstellar medium and in several bodies of the Solar system, where it is commonly exposed to cosmic rays and stellar winds. The chemical, physical and structural effects induced by fast heavy ions in thin layers of pure CH4 ices at 15 K are analysed by mid-infrared spectroscopy (Fourier transform infrared). Different pure CH4 ice samples were irradiated with 6MeV 16O2 +, 220MeV 16O7 +, 267MeV 56Fe22 + and 606MeV 70Zn26 + ions at Grand Accélérateur National d'Ions Lourds/France.
Result. show that CnHm molecules, where n = 2-4 and m = 2(n - 1) to 2(n + 1) and radical species CH3, C2H3 and C2H5 are formed. The destruction cross-sections of CH4 ice and the formation cross-sections of new molecules CnHm are reported. The extrapolation of current results allow us to estimate the half lives of CH4 ices in the interstellar medium and the Solar system (Earth orbit) as about 600x106 and 600 yr, respectively. This huge ratio strongly suggests that the vast majority of chemical or even biochemical processes induced by ionizing radiation occur close to stars.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): astrochemistry - methods: laboratory - techniques: spectroscopic - circumstellar matter

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1

Query : 2013MNRAS.433.2368M

Basic data :
HD 189733b -- Extra-solar Planet
Other object types: otypes_help 		Pl? (), Pl (2005A&A), * (HD)
ICRS coord. (ep=J2000) : 		20 00 43.7129433648 +22 42 39.073143456 (Optical) [ 0.0097 0.0119 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 58 34.1039144743 +22 34 31.825058532 [ 0.0097 0.0119 90 ]
Gal coord. (ep=J2000) : 		060.9630654133127 -03.9222685127365 [ 0.0097 0.0119 90 ]
Proper motions mas/yr : 		-3.208 -250.323 [0.011 0.014 90] A 2020yCat.1350....0G
Parallaxes (mas): 		50.5668 [0.0162] A 2020yCat.1350....0G
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HD 189733b

References (1610 between 1850 and 2026) (Total 1610)
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