2007A&A...469..201G


Query : 2007A&A...469..201G

2007A&A...469..201G - Astronomy and Astrophysics, volume 469, 201-206 (2007/7-1)

Electron density and carriers of the diffuse interstellar bands.

GNACINSKI P., SIKORSKI J.K. and GALAZUTDINOV G.A.

Abstract (from CDS):

We have used the ionisation equilibrium equation to derive the electron density in interstellar clouds in the direction of 13 stars. A linear relation was found that allows determination of the electron density from the MgI and MgII column densities in diffuse clouds. The comparison of a normalised equivalent width of 12 DIBs with the electron density shows that the DIBs equivalent width do not change with electron density varying in the range ne=0.01/2.5cm–3. Therefore the DIBs carriers (1) can be observed only in one ionisation stage, or (2) the DIBs are arising in cloud regions (eg. cores or cloud coronas) for which we cannot determine the electron density.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: molecules

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 940 0
2 * ksi Per ** 03 58 57.9022917 +35 47 27.713205 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 815 0
3 V* HX Vel ** 08 42 16.1937151 -48 05 56.725879 4.39 5.288 5.468 7.877 7.074 B2/3IV/V 117 1
4 * rho Leo s*b 10 32 48.6716770 +09 18 23.709445 2.780 3.720 3.870 3.90 4.06 B1Iab 522 0
5 * b Sco * 15 50 58.7444628720 -25 45 04.658676984 3.84 4.552 4.635     B1.5Vn 279 0
6 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 B1III+B1:V 849 0
7 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1785 2
8 * kap Sco bC* 17 42 29.27520 -39 01 47.9391 1.32 2.211 2.386     B1.5III 233 0
9 * ups Cyg Be* 21 17 55.0858548408 +34 53 48.825463560 3.50 4.32 4.42 4.37 4.45 B2Vne 307 0
10 HD 203374 Be* 21 19 07.3685524992 +61 51 30.436799148 6.23 6.908 6.674     B0IVpe 123 0
11 HD 206267 SB* 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 479 0
12 HD 209339 ** 22 00 39.2649125112 +62 29 16.063886004 5.9 8.73 8.51 7.61   O9.7IV 175 0
13 * lam Cep s*b 22 11 30.5765111040 +59 24 52.154264880 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 666 1

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2022.08.11-02:00:06

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