2001A&A...367..347M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET06:54:07

2001A&A...367..347M - Astronomy and Astrophysics, volume 367, 347-354 (2001/2-3)

UV photodestruction of CH bonds and the evolution of the 3.4 µm feature carrier. I. The case of aliphatic and aromatic molecular species.

MUNOZ CARO G.M., RUITERKAMP R., SCHUTTE W.A., GREENBERG J.M. and MENNELLA V.

Abstract (from CDS):

Experiments simulating the processing of various hydrocarbon species under diffuse and dense cloud conditions by UV irradiation were performed. The results indicate that such molecules will be efficiently dehydrogenated in interstellar space. It is argued that the presence of hydrogen in the aliphatic grain material in diffuse clouds results from an equilibrium between dehydrogenation by UV processing and re-hydrogenation by the impinging atomic gas. In dense clouds, the presence of the ice layer will prevent the re-hydrogenation process, causing the carbonaceous grain material to be gradually de-hydrogenated if UV photons are able to penetrate into the dense medium. The implications of this study for the evolution of the carbonaceous component of dust in the interstellar medium are discussed.

Abstract Copyright:

Journal keyword(s): ISM: dust, extinction - infrared: ISM: lines and bands - methods: laboratory

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Kim 1-38 * 04 39 38.8673861844 +26 11 26.630421918           K1III 125 0
2 NAME Mon R2 IRS 2 * 06 07 45.83 -06 22 53.5           B0 102 0
3 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 655 2
4 EM* SR 3 Y*O 16 26 09.3231207767 -24 34 12.176811236   10.9 9.88   9.01 A0 107 0
5 GCIRS 6E WR* 17 45 39.632 -29 00 27.05           Ofpe/WN9 60 0
6 W 33a Y*O 18 14 39.0 -17 52 03           ~ 588 0
7 RAFGL 2136 SFR 18 22 26.8740 -13 30 17.177           ~ 247 0
8 NGC 7538 OpC 23 13 37 +61 30.0           ~ 831 0
9 IRAS 23118+6110 Y*O 23 14 01.63 +61 27 20.2           ~ 346 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-06:54:07

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