2004A&A...414..409N

Query : 2004A&A...414..409N

2004A&A...414..409N - Astronomy and Astrophysics, volume 414, 409-423 (2004/2-1)

The physical and chemical structure of hot molecular cores.

NOMURA H. and MILLAR T.J.

Abstract (from CDS):

We have made self-consistent models of the density and temperature profiles of the gas and dust surrounding embedded luminous objects using a detailed radiative transfer model together with observations of the spectral energy distribution of hot molecular cores. Using these profiles we have investigated the hot core chemistry which results when grain mantles are evaporated, taking into account the different binding energies of the mantle molecules, as well a model in which we assume that all molecules are embedded in water ice and have a common binding energy. We find that most of the resulting column densities are consistent with those observed toward the hot core G34.3+0.15 at a time around 10⁴ years after central luminous star formation. We have also investigated the dependence of the chemical structure on the density profile which suggests an observational possibility of constraining density profiles from determination of the source sizes of line emission from desorbed molecules.

Abstract Copyright: ∼

Journal keyword(s): molecular processes - radiative transfer - stars: formation - ISM: individual objects: G34.3+0.15

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 - 2023	#notes
1	RAFGL 2271	SFR	18 53 18.54	+01 14 57.9						~	499	0

Query : 2004A&A...414..409N

Basic data :

RAFGL 2271 -- Star Forming Region
Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types:	`HII (1996A&AS,[BNM96],...)`, `Rad (HSNH,RFS)`, `IR (IRAS,RAFGL)`, `SFR (2017MNRAS)`, `Mas ([HC96])`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) :	`18 53 18.54 +01 14 57.9 [ ] D ~`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) :	`18 50 46.14 +01 11 12.3 [ ]`
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) :	`034.25717 +00.15346 [ ]`
Velocity of Local System : VSLR Vmin Vmax [error] (wavelength) bibcode VLSR :	`57.2 54.9 59.5 [0.13] (Rad)` `1996A&AS..115...81B`

', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad

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`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 (499 between 1850 and 2023) (Total 499)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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

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IRAS 18507+0110 RAFGL 2271

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