2010A&A...521L..42B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST09:37:26

2010A&A...521L..42B - Astronomy and Astrophysics, volume 521, L42-42 (2010/10-1)

First detection of ND in the solar-mass protostar IRAS 16293-2422.

BACMANN A., CAUX E., HILY-BLANT P., PARISE B., PAGANI L., BOTTINELLI S., MARET S., VASTEL C., CECCARELLI C., CERNICHARO J., HENNING T., CASTETS A., COUTENS A., BERGIN E.A., BLAKE G.A., CRIMIER N., DEMYK K., DOMINIK C., GERIN M., HENNEBELLE P., KAHANE C., KLOTZ A., MELNICK G., SCHILKE P., WAKELAM V., WALTERS A., BAUDRY A., BELL T., BENEDETTINI M., BOOGERT A., CABRIT S., CASELLI P., CODELLA C., COMITO C., ENCRENAZ P., FALGARONE E., FUENTE A., GOLDSMITH P.F., HELMICH F., HERBST E., JACQ T., KAMA M., LANGER W., LEFLOCH B., LIS D., LORD S., LORENZANI A., NEUFELD D., NISINI B., PACHECO S., PEARSON J., PHILLIPS T., SALEZ M., SARACENO P., SCHUSTER K., TIELENS X., VAN DER TAK F.F.S., VAN DER WIEL M.H.D., VITI S., WYROWSKI F., YORKE H., FAURE A., BENZ A., COEUR-JOLY O., CROS A., GUESTEN R. and RAVERA L.

Abstract (from CDS):

In the past decade, much progress has been made in characterising the processes leading to the enhanced deuterium fractionation observed in the ISM and in particular in the cold, dense parts of star forming regions such as protostellar envelopes. Very high molecular D/H ratios have been found for saturated molecules and ions. However, little is known about the deuterium fractionation in radicals, even though simple radicals often represent an intermediate stage in the formation of more complex, saturated molecules. The imidogen radical NH is such an intermediate species for the ammonia synthesis in the gas phase. Many of these light molecules however have their fundamental transitions in the submillimetre domain and their detection is hampered by the opacity of the atmosphere at these wavelengths. Herschel/HIFI represents a unique opportunity to study the deuteration and formation mechanisms of species not observable from the ground. We searched here for the deuterated radical ND in order to determine the deuterium fractionation of imidogen and constrain the deuteration mechanism of this species. We observed the solar-mass Class 0 protostar IRAS16293-2422 with the heterodyne instrument HIFI in Bands 1a (480-560GHz), 3b (858-961GHz), and 4a (949-1061GHz) as part of the Herschel key programme CHESS (Chemical HErschel Survey of Star forming regions). The deuterated form of the imidogen radical ND was detected and securely identified with 2 hyperfine component groups of its fundamental transition (N=0-1) at 522.1 and 546.2GHz, in absorption against the continuum background emitted from the nascent protostar. The 3 groups of hyperfine components of its hydrogenated counterpart NH were also detected in absorption. The absorption arises from the cold envelope, where many deuterated species have been shown to be abundant. The estimated column densities are ∼2x1014cm–2 for NH and ∼1.3x1014/cm2 for ND. We derive a very high deuterium fractionation with an [ND]/[NH] ratio of between 30 and 100%. The deuterium fractionation of imidogen is of the same order of magnitude as that in other molecules, which suggests that an efficient deuterium fractionation mechanism is at play. We discuss two possible formation pathways for ND, by means of either the reaction of N+ with HD, or deuteron/proton exchange with NH.

Abstract Copyright:

Journal keyword(s): ISM: molecules - stars: formation

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 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST09:37:26

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


Basic data :
IRAS 16293-2422 -- Dense core
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:
cor (), smm (Ref,JCMTLSG,...), IR (Ref,IRAS,...), Y*? (Ref,[HL2013]), Y*O (Ref,[EES2009]), mm (Ref,[YEE2006]), PoC ([FST86])
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) :
16 32 22.56 -24 28 31.8 (Infrared) [ 300 300 90 ] C 2009ApJ...692..973E
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) :
16 29 20.70 -24 22 11.7 [ 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) :
353.93571 +15.84098 [ 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)
  • (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):
0.93 0.93 90 (mm) D 2008ApJ...683..822J
SIMBAD with radius arcmin
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Some important notes on this object about identifications and objects associations.
notes:


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

: 1
The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 2
: 1767 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (17) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME IRAS 1629A NAME IRAS 16293 [EDJ2009] 1008 [NWA2006] SMM 20
IRAS 16293-2422 NAME rho Oph East [EES2009] Oph-emb 2 [YEE2006] 37
JCMTLSG J163222.6-242833 SSTc2d J163222.6-242832 [FST86] rho Oph E
JCMTSE J163222.8-242837 SSTc2d J163222.6-242831 [HL2013] 248.09427-24.47550
JCMTSF J163222.8-242837 WISE J163222.62-242833.6 [JJK2008] SMM J163223-24284

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References (1035 between 1850 and 2020) (Total 1035)
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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Observing logs


ISO : 23    herschel : 27   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : IRAS 16293-2422

Link by name to the catalogue in VizieR :

IRAS 16293-2422 WISE J163222.62-242833.6

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2020.07.05-09:37:26

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