2005A&A...430..967L


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST02:59:56

2005A&A...430..967L - Astronomy and Astrophysics, volume 430, 967-977 (2005/2-2)

Deuterated molecular hydrogen in the Galactic ISM. New observations along seven translucent sightlines.

LACOUR S., ANDRE M.K., SONNENTRUCKER P., LE PETIT F., WELTY D.E., DESERT J.-M., FERLET R., ROUEFF E. and YORK D.G.

Abstract (from CDS):

We present column density measurements of the HD molecule in the interstellar gas toward 17 Galactic stars. The values for the seven most heavily reddened sightlines, with E(B-V)=0.38-0.72, are derived from observations with the Far Ultraviolet Spectroscopic Explorer (FUSE). The other ten values are from a reanalysis of spectra obtained with Copernicus. In all cases, high-resolution ground-based observations of KI and/or the CH molecule were used to constrain the gas velocity structure and to correct for saturation effects. Comparisons of the column densities HD, CH, CN, and KI in these 17 sightlines indicate that HD is most tightly correlated with CH. Stringent lower limits to the interstellar D/H ratio, derived from the HD/2H2 ratio, range from 3.7x10–7 to 4.3x10–6. Our results also suggest that the HD/H2 ratio increases with the molecular fraction f(H2) and that the interstellar D/H ratio might be obtained from HD by probing clouds with f(H2)∼1. Finally, we note an apparent relationship between the molecular fractions of hydrogen and deuterium.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: clouds - ISM: lines and bands - ISM: molecules - ultraviolet: ISM

Status at CDS:  

Simbad objects: 17

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Number of rows : 17

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 HD 20753 * 03 21 38.4133737021 +33 04 20.301226376   8.64 8.59     A0 4 0
2 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 796 2
3 HD 21278 SB* 03 28 03.0722871396 +49 03 46.331543444   4.89 4.97     B5V 193 0
4 * omi Per ** 03 44 19.13204 +32 17 17.6929 3.13 3.88 3.83 3.71 3.71 B1III 572 0
5 * zet Per V* 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 812 0
6 * eps Per bC* 03 57 51.2320472 +40 00 36.775143 1.71 2.71 2.89 2.96 3.14 B1.5III 494 0
7 * ksi Per ** 03 58 57.9022917 +35 47 27.713205 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 789 0
8 * 62 Tau * 04 23 59.7629429746 +24 18 03.527426906 6.18 6.499 6.337     B 187 0
9 * 139 Tau Em* 05 57 59.6563212 +25 57 14.079839 3.82 4.76 4.82 4.76 4.87 B0/1II/III 266 0
10 HD 73882 EB* 08 39 09.53412 -40 25 09.2608 7.07 7.59 7.19 6.67 6.30 O8.5IV 218 2
11 HD 110432 Be* 12 42 50.2655719413 -63 03 31.048323668 4.79 5.58 5.31     B0.5IVpe 267 0
12 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1722 2
13 HD 185418 * 19 38 27.4810594267 +17 15 26.046198639 7 7.639 7.485     B0.5V 115 0
14 HD 192639 s*b 20 14 30.4275040181 +37 21 13.815126140 6.83 7.46 7.11     O7.5Iabf 268 0
15 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 465 0
16 HD 206267 SB* 21 38 57.6182747705 +57 29 20.557311013 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 450 0
17 * 10 Lac ** 22 39 15.6786372 +39 03 00.971152 3.650 4.670 4.880 4.98 5.19 O9V 718 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-02:59:56

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