Table 1
Locations and properties of the selected fields.
| l | b | Distancea | Massb | Agec | ⟨NH⟩ |
|
f 22 | f 21 | |
| Field | [°] | [°] | [pc] | [ M⊙ ] | [Myr] | [1021 cm-2] | [1021 cm-2] | [%] | [%] |
|
|
|||||||||
| Polaris Flare | 120 | 27 | 130–140 | – | – | 1.1 | 5.0 | 0 | 58 |
| Taurus | 173 | −15 | 140 | 2 × 104 | 20 | 4.1 | 26 | 4.2 | 0.8 |
| Orion | 211 | −16 | 414 | 3 × 105 | >12 | 4.0 | 40 | 5.4 | 7.3 |
| Chamaeleon-Musca | 300 | −13 | 160–180 | 5 × 103 | >2 | 2.0 | 21 | 0.5 | 7.5 |
| Ophiuchus | 354 | 15 | 120–140 | 3 × 104 | >2–5 | 3.1 | 62 | 2.2 | 3.8 |
|
|
|||||||||
| Microscopium | 15 | −40 | – | – | – | 0.4 | 1.1 | 0 | 99 |
| Pisces | 133 | −37 | – | – | – | 0.4 | 1.9 | 0 | 99 |
| Perseus | 143 | −25 | – | – | – | 0.4 | 1.5 | 0 | 99 |
| Ara | 336 | −14 | – | – | – | 0.8 | 2.1 | 0 | 75 |
| Pavo | 336 | −28 | – | – | – | 0.4 | 1.4 | 0 | 99 |
Notes. The table includes: Galactic longitudes l and latitudes b of the centre of the 12° × 12° fields; estimates of distances, masses and ages, where available; average and maximum column densities at 15′ resolution; fraction f22 of the pixels with NH> 1022 cm-2; and fraction f21 of the pixels with NH < 1021 cm-2. These fields are the same as several of those listed in Table 1 of Planck Collaboration Int. XIX (2014).
Estimates of distances are from Elias (1978) for Taurus, Zagury et al. (1999) for Polaris Flare, de Zeeuw et al. (1999) for Ophiuchus, Whittet et al. (1997) for Chamaeleon-Musca, and Draine (2011) for Orion.
Estimates of masses are from Ungerechts & Thaddeus (1987) for Taurus, Loren (1989) for Ophiuchus, Luhman (2008) for Chamaeleon-Musca, and Draine (2011) for Orion.
Estimates of ages are from Palla & Stahler (2002) for Taurus, Wilking et al. (2008) for Ophiuchus, Luhman (2008) for Chamaeleon-Musca, and Bally (2008) for Orion.
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