Table 1
Single-cloud lines-of-sight properties.
| Star | ISM | |||||||
|---|---|---|---|---|---|---|---|---|
| Identifier | Spectral type | v sin(i) | E(B–V)a | RV | Ref  |
f(H2)c | Na I-UV velocity | 5797/5780d |
| (km s−1) | (mag) | (km s−1) | ||||||
| HD 23180 | B1 III | 100 | 0.28 | 3.11 | V04 | 0.51 | 13.8 ± 0.3 | 0.73 (ζ) |
| HD 24398 | B1 Ib | 43 | 0.29 | 2.63 | W03 | 0.60 | 14.2 ± 0.2 | 0.53 (ζ) |
| HD 203532 | B3 IV | – | 0.30 | 3.37 | V04 | 0.84 | 15.2 ± 0.2 | 0.48 (ζ) |
| HD 149757 | O9.2 IVnn | 303 | 0.32 | 2.55 | V04 | 0.63 | –14.2 ± 0.5 | 0.43 (ζ) |
| HD 185418 | B0.5 IIIn | – | 0.42 | 2.54 | V04 | 0.40 | –10.7 ± 0.5 | 0.30 (σ) |
| HD 170740 | B2 V | 25 | 0.45 | 3.01 | V04 | 0.58 | –9.9 ± 1.5 | 0.26 (σ) |
| HD 147889 | B2 V | 100 | 1.03 | 3.95 | V04 | 0.62 | –6.7 ± 1.0 | 0.41 (ζ) |
| HD 169454e | B1 Ia | 49 | 1.03 | 3.37 | V04 | – | –9.9 ± 1.5 | 0.34 (σ) |
Notes. (a) E(B–V) is based on photometry and intrinsic colors. (b)From Valencic et al. (2004; V04) and Wegner (2003; W03). (c)From Jenkins (2009). (d)The 5797/5780 DIB ratio is related to the effective UV radiation field strength; UV exposed environments, σ-type, have ratios <0.35, while UV-shielded, ζ-type environments, have ratios ≥0.35 (c.f. Vos et al. 2011). (e)HD 169454 is not a single-cloud line-of-sight but it is used for comparison (c.f. Sect. 7).
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