2011ApJ...737L..14R

Query : 2011ApJ...737L..14R

2011ApJ...737L..14R - Astrophys. J., 737, L14 (2011/August-2)

Solid-state CO oxidation by atomic O: a route to solid CO₂ synthesis in dense molecular clouds.

RAUT U. and BARAGIOLA R.A.

Abstract (from CDS):

Investigations with infrared spectroscopy and microgravimetry show that CO₂ forms in small quantities during codeposition of CO and cooled O and O₂ into thin films at 20 K: ∼3x10¹⁴ CO₂/cm2 within a film containing 2.7x10¹⁷ CO/cm2. The reason for the low CO₂ yield is that O atoms react preferentially with O to form O₂, and with O₂ to form ozone, which was not considered in previous studies with atomic beams. Heating a CO + O + O₂ film capped with a ∼2.5 µm thick water ice layer to 80 K increased CO₂ by 30%, showing additional reactions between O and CO diffusing in the ice layer. Although the CO₂:CO = 10^–3 measured in our experiments is at least two orders of magnitude smaller than reported interstellar ratios, sputtering and differential desorption during transient heating events, e.g., by impacts of cosmic rays or stellar winds, can increase the ratio to observed values.

Abstract Copyright: ∼

Journal keyword(s): astrochemistry - infrared: ISM - ISM: abundances - ISM: molecules - methods: laboratory - molecular processes

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	IC 5146	OpC	21 53 29.3	+47 14 46						~	507	2

Query : 2011ApJ...737L..14R

Basic data :

IC 5146 -- Open Cluster
Other object types:	`OpC (2013A&A,OCISM,...)`, `Cl* (2020A&A,C,...)`, `As* (2019AJ,[KC2019])`, `HII (LBN)`, `* (IC)`, `ISM (Min)`
ICRS coord. (ep=J2000) :	`21 53 29.3 +47 14 46 (Optical) [ ] E 2021A&A...647A..19T`
FK4 coord. (ep=B1950 eq=1950) :	`21 51 33.5 +47 00 35 [ ]`
Gal coord. (ep=J2000) :	`094.3820 -05.5204 [ ]`
Proper motions mas/yr :	`-2.910 -2.490 [0.037 0.037 90] C` `2020A&A...633A..99C`
Radial velocity / Redshift / cz :	`V(km/s) -5.48 [0.25] / z(spectroscopic) -0.000018 [0.000001] / cz -5.48 [0.25] (NIR) A 2019A&A...623A..80C`
Parallaxes (mas):	`1.213 [0.013] C` `2020A&A...633A..99C`
Angular size (arcmin):	`8.2 8.2 0 (Opt) D` `2020A&A...633A..99C`

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`IC 5146`	`LBN 424`	`NAME Cocoon Nebula`	`OCl 213.0`
`C 2151+470`	`LBN 094.43-05.58`	`OCISM 43`	`[KC2019] Theia 88`
`Cl Collinder 470`	`Min 2-70`	`OCl 213`	`[KPS2012] MWSC 3571`

References (507 between 1850 and 2026) (Total 507)
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Data at NED - NASA/IPAC Extragalactic Database : IC 5146

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