2013ApJ...768L..25H

Query : 2013ApJ...768L..25H

2013ApJ...768L..25H - Astrophys. J., 768, L25 (2013/May-2)

Spectroscopic constants and vibrational frequencies for l-C3H+ and isotopologues from highly accurate quartic force fields: the detection of l-C3H+ in the Horsehead nebula PDR questioned.

HUANG X., FORTENBERRY R.C. and LEE T.J.

Abstract (from CDS):

Very recently, molecular rotational transitions observed in the photon-dominated region of the Horsehead nebula have been attributed to l-C3H+. In an effort to corroborate this finding, we employed state-of-the-art and proven high-accuracy quantum chemical techniques to compute spectroscopic constants for this cation and its isotopologues. Even though the B rotational constant from the fit of the observed spectrum and our computations agree to within 20 MHz, a typical level of accuracy, the D rotational constant differs by more than 40%, while the H rotational constant differs by three orders of magnitude. With the likely errors in the rotational transition energies resulting from this difference in D on the order of 1 MHz for the lowest observed transition (J = 4 ⟶ 3) and growing as J increases, the assignment of the observed rotational lines from the Horsehead nebula to l-C3H+ is questionable.

Abstract Copyright: ∼

Journal keyword(s): astrochemistry - ISM: individual: Horsehead nebula - ISM: lines and bands - ISM: molecules - molecular data - radio lines: ISM

Simbad objects: 1

goto Full paper

goto 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 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0

Query : 2013ApJ...768L..25H

Basic data :
NAME Horsehead Nebula -- Dark Cloud (nebula)
Other object types: otypes_help 		DNe (Barnard,[DB2002b]), MoC (M3T), Cld ([OS98])
ICRS coord. (ep=J2000) : 		05 40 59.0 -02 27 30 [ ] D ~
FK4 coord. (ep=B1950 eq=1950) : 		05 38 28.1 -02 28 59 [ ]
Gal coord. (ep=J2000) : 		206.9561 -16.7752 [ ]
Angular size (arcmin): 		6 4 90 (~) D 2002A&A...383..631D
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (5) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME Horsehead Nebula M3T 31 [OS98] 52
Barnard 33 [DB2002b] G206.95-16.80

References (555 between 1850 and 2026) (Total 555)
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
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Observing logs

Herschel : 38   

   

External archives :

Search by coordinates in Vizier (radius: 30 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 2013ApJ...768L..25H and select 'bookmark this link' or equivalent in the popup menu