Hydrogen in diffuse molecular clouds in the Milky Way - Atomic column densities and molecular fraction along prominent lines of sight

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Volume 600 (April 2017)

A&A, 600 (2017) A2

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Table 1

Program sources and JVLA continuum images summary.

Source	Phase center		l	b	D	R	ν_lsr	θ_maj,min	PA	σ(T_B)	σ(S_ν)
	α_J2000	δ_J2000	[deg]	[deg]	[kpc]	[kpc]		[′′ × ′′]	[deg]	[K]

Sgr B2 (M)		−28°23′08″	0.6666	−0.0362	8.3^a	0.1	62ⁱ	45 × 29	32	44	95
G 10.62−0.39		−19°55′51″	10.6229	−0.3835	5.0^b	3.6	−3^a	36 × 30	51	14	25
W 33 A		−17°52′02″	12.9077	−0.2596	2.4^c	6.1	39^a	42 × 25	52	19	34
G 31.41+0.31		−01°12′44″	31.4125	+0.3070	4.9^d	4.9	96^j	36 × 21	75	12	15
G 34.26+0.15		+01°14′57″	34.2569	+0.1532	1.6^e	7.1	58^k	36 × 21	78	18	22
W 49		+09°06′11″	43.1652	+0.0121	11.1^f	7.6	10^a	34 × 20	−86	76	84
W 51		+14°30′30″	49.4883	−0.3876	5.4^g	6.4	57^a	34 × 20	84	102	114
DR 21 (OH)		+42°22′46″	81.7201	+0.5718	1.5^h	8.3	−3^a	44 × 19	67	12	17

Notes. Column 1: source name, Cols. 2 and 3: phase center equatorial coordinates, Cols. 4 and 5: Galactic coordinates, Col. 6: heliocentric distance with reference, Col. 7: Galactocentric distance, Col. 8: approximate LSR velocity of continuum source, Col. 9: restoring beam size major × minor axis, Col. 10: beam position angle E of N, and continuum-emission RMS noise in Col. 11: brightness temperature, and Col. 12: 1.42-GHz flux density.

Reference. References for distances are

^(a)

Reid et al. (2014), for this region, we adopted the best-fit Galactic center distance (8.34 kpc) discussed in the study;

^(b)

Sanna et al. (2014);

^(c)

Immer et al. (2013);

^(d)

we adopt the average value determined by Zhang et al. (2014) for the source pair G 31.28+0.06/G 31.58+0.07 that brackets this region in longitude and has a similar LSR velocity, the distance is compatible with the estimate by Reid et al. (2017);

^(e)

Kurayama et al. (2011), the distance was determined for a source that resides ~ 10′ of our position in the same infrared dark cloud filament;

^(f)

Zhang et al. (2013);

^(g)

Sato et al. (2010);

^(h)

Rygl et al. (2012);

⁽ⁱ⁾

Belloche et al. (2013);

^(j)

Bronfman et al. (1996);

^(k)

Wyrowski et al. (2012).

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