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Table 1

Parameterization of the reflection nebulae, modeled with uniform-density, spherical clouds filled with cold, solar abundance matter.

Molecular Cloud Projected Line of sight Offsetc Velocityd Hydrogen column Electron References
cloud radius distancea distanceb (pc) (km s-1) density (× 1022 cm-2) optical
(pc) (pc) (pc) depth

Sgr B2 5 –100 –17 –4.0 60 80 0.5 E, I
Sgr B1 6 –79.1 –23 –6 –45 12.3 0.3 A, D, G
G0.11-0.11 3.7 –25 –17 –13 25 2 0.03 E, F
Bridge E 2.0 –21.6 –60 –1.3 55 9.6 0.07 B, E, F
Bridge D 1.6 –18.3 –60 0.5 55 13.2 0.09 B, E, F
Bridge B2 1.8 –16.3 –60 –1.5 55 12.3 0.08 B, E, F
MC2 1.8 –14 <–17 –2.6 –10 <2 0.36 C, E
MC1 1.8 –12 –50 1.3 –15 4 0.32 E
Sgr C3 6 50 –53 –12 60 8.7 <1 H, E
Sgr C2 4.7 66 58 –14 60 11.4 <1 H, E
Sgr C1 4.7 71 –74 –1.5 60 6.5 <1 H, E

Notes.

(a)

Positive = east of the Galactic center;

(b)

Positive = behind the Galactic plane (farther to us than Sgr A);

(c)

Positive = above the equatorial plane.

(d)

Positive = away from Earth.

Reference. A: An et al. (2013); B: Capelli et al. (2012); C: Clavel et al. (2013); D: Downes et al. (1980); E: Ponti et al. (2010); F: Ponti et al. (2014); G: Ryu et al. (2009); H: Ryu et al. (2013) and I: Sunyaev et al. (1993).

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