1999MNRAS.304...61M

Query : 1999MNRAS.304...61M

1999MNRAS.304...61M - Mon. Not. R. Astron. Soc., 304, 61-66 (1999/March-3)

CH-3-CN photochemistry at hot core margins.

MacKAY D.D.S.

Abstract (from CDS):

CH₃CN is a species observed to be much more abundant in ultracompact hot molecular cores (UCHCs) than can be accounted for by dark cloud gas phase chemistry. The close proximity of UCHCs to newly formed OB stars suggests that an impinging far ultraviolet (FUV) radiation field might contribute to the chemical processing at the core margins. In this paper, the photochemistry of gas phase CH₃CN formation is explored assuming an enhanced FUV radiation field interacts with dense neutral material evaporated from grain mantle ices. We are able to show that high CH₃CN/CH₃OH abundance ratios can be generated from CH₃OH and NH₃ precursors in such a photon-dominated margin as a realistic alternative to a grain surface origin. We show that the observed CH₃CN/CH₃OH column density ratio towards the UCHC in G34.3+0.15 can be interpreted as arising from photochemical generation of CH₃CN in the gas phase.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): molecular processes - ISM: abundances - ISM: clouds - ISM: molecules

Simbad objects: 1

Full paper

View the references in ADS

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	RAFGL 2271	SFR	18 53 18.54	+01 14 57.9						~	537	0

Query : 1999MNRAS.304...61M

Basic data :

RAFGL 2271 -- Star Forming Region
Other object types:	`HII (1996A&AS,[BNM96],...)`, `Rad (HSNH,RFS)`, `IR (IRAS,RAFGL)`, `SFR (2017MNRAS)`, `Mas ([HC96])`
ICRS coord. (ep=J2000) :	`18 53 18.54 +01 14 57.9 [ ] D ~`
FK4 coord. (ep=B1950 eq=1950) :	`18 50 46.14 +01 11 12.3 [ ]`
Gal coord. (ep=J2000) :	`034.25717 +00.15346 [ ]`
VLSR :	`57.2 54.9 59.5 [0.13] (Rad)` `1996A&AS..115...81B`

Overlay

points in this preview

2MASS DSS

All

(CDSPortal)

Send to

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

An access of full data is available using the icon Vizier near the identifier of the catalogue

`GAL 034.3+00.2`	`GAL 034.30+00.15`	`IRAS 18507+0110`	`[KB94] 23`
`GAL 034.25+00.14`	`GAL 034.30+00.20`	`RAFGL 2271`	`[L89b] 34.254+00.144`
`GAL 034.26+00.16`	`GAL 034.3+00.15`	`RFS 581`	`[WAM82] 034.256+0.148`
`GAL 034.25+00.15`	`GAL 034.26+00.15`	`[BNM96] 034.253+0.147`	`[WC89] 034.26+0.15`
`GAL 034.26+00.14`	`HSNH 104`	`[HC96] G34.26+0.15`	`[WWB83] G034.26+0.15`

References (537 between 1850 and 2026) (Total 537)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

Follow new references on this object

Collections of Measurements

Observing logs

External archives :

Data at NED - NASA/IPAC Extragalactic Database : RAFGL 2271

Link by name to the catalogue in VizieR :

IRAS 18507+0110 RAFGL 2271

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 1999MNRAS.304...61M and select 'bookmark this link' or equivalent in the popup menu