2013MNRAS.435.3541H

Query : 2013MNRAS.435.3541H

2013MNRAS.435.3541H - Mon. Not. R. Astron. Soc., 435, 3541-3546 (2013/November-2)

CN excitation and electron densities in diffuse molecular clouds.

HARRISON S., FAURE A. and TENNYSON J.

Abstract (from CDS):

Utilizing previous work by the authors on the spin-coupled rotational cross-sections for electron-CN collisions, data for the associated rate coefficients are presented. Data on rotational, fine-structure and hyperfine-structure transition involving rotational levels up to N = 20 are computed for temperatures in the range 10-1000K. Rates are calculated by combining Born-corrected R-matrix calculations with the infinite-order-sudden approximation. The dominant hyperfine transitions are those with ΔN = Δj = ΔF = 1. For dipole-allowed transitions, electron-impact rates are shown to exceed those for excitation of CN by para-H2(j = 0) by five orders of magnitude. The role of electron collisions in the excitation of CN in diffuse clouds, where local excitation competes with the cosmic microwave background photons, is considered. Radiative transfer calculations are performed and the results compared to observations. These comparisons suggest that electron density lies in the range n(e) ∼ 0.01-0.06cm-3 for typical physical conditions present in diffuse clouds.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): astrochemistry - molecular data - molecular processes - scattering - ISM: abundances - ISM: molecules

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 - 2026 		#notes
1 HD 154368 s*b 17 06 28.3687759224 -35 27 03.760593156 6.10 6.63 6.13 7.12   O9.5Iab 316 0

Query : 2013MNRAS.435.3541H

Basic data :
HD 154368 -- Blue Supergiant
Other object types: otypes_help 		* (1971PW&SO,HD,...), ** (**,CCDM,...), UV (TD1,[SC96]), s*b (1954PASP), Pu* (2009yCat), V* (V*), NIR (2MASS)
ICRS coord. (ep=J2000) : 		17 06 28.3687759224 -35 27 03.760593156 (Optical) [ 0.0262 0.0147 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		17 03 08.4353004297 -35 23 04.529671286 [ 0.0262 0.0147 90 ]
Gal coord. (ep=J2000) : 		349.9702261755569 +03.2150601204455 [ 0.0262 0.0147 90 ]
Proper motions mas/yr : 		1.231 -2.175 [0.040 0.026 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 11 [3] / z(spectroscopic) 0.000037 [0.000010] / cz 11.00 [3.00]
   (Opt) C 2018A&A...613A..65H
Parallaxes (mas): 		0.9396 [0.0342] A 2020yCat.1350....0G
Spectral type: 		O9.5Iab C 1954PASP...66..249B
Fluxes (8) :
U 6.10 [~] C 2002yCat.2237....0D
B 6.63 [~] C 2002yCat.2237....0D
V 6.13 [~] C 2002yCat.2237....0D
R 7.12 [0.34] E 2012yCat.1322....0Z
G 5.937191 [0.002840] C 2020yCat.1350....0G
J 5.024 [0.039] C 2003yCat.2246....0C
H 4.851 [0.038] C 2003yCat.2246....0C
K 4.754 [0.021] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 1551 Display criteria :

Identifiers (37) :
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HD 154368 GCRV 9862 2MASS J17062836-3527039 V* V1074 Sco
** B 894AB GEN# +1.00154368 PPM 295906 WDS J17065-3527AB
ALS 3919 GOS G349.97+03.22 01 SAO 208410 WEB 14153
ASCC 1877523 GSC 07369-00106 SKY# 30844 [SC95] ZET 279
CCDM J17065-3527AB Hbg 1297 TD1 19916 [SC96] Mis 280
CD-35 11306 HIC 83706 TIC 41792209 Gaia DR2 5977233658593947520
CGO 435 HIP 83706 TYC 7369-106-1 Gaia DR3 5977233658593947520
CPC 18 8504 HR 6347 UBV 14408
CPD-35 6849 IDS 16598-3519 AB UCAC4 273-103831
GC 23063 LS 3919 uvby98 100154368

References (316 between 1850 and 2026) (Total 316)
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 Description of Measurements

Velocities : 7    Distance : 3    Rot : 7    Fe/H : 4    Plx : 4    PM : 5    SpT : 11   

   

Observing logs
Herschel : 1    ISO : 5    IUE : 21   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

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HD 154368 ALS 3919 CCDM J17065-3527AB CD-35 11306 CPD-35 6849
GSC 07369-00106 HIC 83706 HIP 83706 HR 6347 LS 3919
2MASS J17062836-3527039 PPM 295906 SAO 208410 TD1 19916 TYC 7369-106-1
UCAC4 273-103831 uvby98 100154368 V* V1074 Sco WDS J17065-3527AB Gaia DR2 5977233658593947520
Gaia DR3 5977233658593947520

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