2007A&A...464..253C


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET15:21:11

2007A&A...464..253C - Astronomy and Astrophysics, volume 464, 253-257 (2007/3-2)

Carbamic acid produced by the UV/EUV irradiation of interstellar ice analogs.

CHEN Y.-J., NUEVO M., HSIEH J.-M., YIH T.-S., SUN W.-H., IP W.-H., FUNG H.-S., CHIANG S.-Y., LEE Y.-Y., CHEN J.-M. and WU C.-Y.R.

Abstract (from CDS):

Carbamic acid (NH2COOH) is the smallest amino acid, smaller than the smallest proteinaceous amino acid glycine. This compound has never been observed in the interstellar medium (ISM). Previous experiments where ice mixtures containing H2O, CO2 and NH3 were subjected to 1-MeV proton bombardment showed that carbamic acid is formed in a stable zwitterionic (NH3+COO) form. In the present work, we have carried out irradiations of ice mixtures containing H2O, 12CO2/13CO2 and NH3 with ultraviolet (UV)/extreme ultraviolet (EUV) photons provided by a synchrotron source in the 4-20eV range, and compared the results with those obtained for energetic protons. Infrared (IR) spectroscopy and mass spectrometry were used to identify the formed photo-products and monitor their evolution in the ices at 15K and during the warming up to room temperature in the formed residues. We identified the IR absorption features of HNCO, OCN, CO, NH4+ and NH2CHO at low temperature in the ices, and features assigned to carbamic acid in the residues around 250K. Finally, we conclude that under our experimental conditions, unlike what was obtained after bombardment with energetic protons, carbamic acid may be formed in the neutral form, and propose some photochemical pathways leading to its formation.

Abstract Copyright:

Journal keyword(s): astrochemistry - molecular processes - methods: laboratory - techniques: spectroscopic - ISM: molecules - ultraviolet: ISM

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 - 2020
#notes
1 [WBN74] NGC 7538 IRS 9 Y*O 23 14 01.63 +61 27 20.2           ~ 336 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET15:21:11

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
[WBN74] NGC 7538 IRS 9 -- Young Stellar Object
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:
IR (AKARI,IRAS,...), smm (JCMTSE,JCMTSF,...), out (Ref), Y*O (Ref), G (2MASX)
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) :
23 14 01.63 +61 27 20.2 (Infrared) [ 300 300 90 ] C 2008ApJ...678..985B
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) :
23 11 52.75 +61 10 59.2 [ 300 300 90 ]
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) :
111.56711 +00.75203 [ 300 300 90 ]
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (incl) : inclination (in units of 15° from 0 to 7)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.480 0.096 55 (IR) C 2006AJ....131.1163S
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (3) :
J 17.06 [0.95] E 2006AJ....131.1163S
H 9.73 [0.05] C 2006AJ....131.1163S
K 7.66 [0.10] C 2006AJ....131.1163S
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME NGC 7538 IRS 9 IRCO 1151 2MASX J23140209+6127188 [RW2005] SMM 60
AKARI-IRC-V1 J2314016+612719 JCMTSE J231402.2+612721 MSX6C G111.5671+00.7517 [WBG79] NGC 7538(E)
IRAS 23118+6110 JCMTSF J231402.2+612721 NGC 7538E [WBN74] NGC 7538 IRS 9

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References (336 between 1850 and 2020) (Total 336)
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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Collections of Measurements


distance : 1   

   

Observing logs


ISO : 16   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : [WBN74] NGC 7538 IRS 9

Link by name to the catalogue in VizieR :

AKARI-IRC-V1 J2314016+612719 IRAS 23118+6110 2MASX J23140209+6127188 MSX6C G111.5671+00.7517

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2019.12.10-15:21:11

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