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Table 1

Atomic and molecular surveys of the Galactic bulge.

Species Frequ. Observed Area Sampling FWHM Ref.
[GHz] l b interval
[°] [°]
H i 1.4  −11 ≤ l ≤ 13  −10 ≤ b ≤ 10 30′ 21′ 1
C i 492  −0.5 ≤ l ≤ 1.5 0 3′ 2′ 2
C ii 1900  −100 ≤ l ≤ 60  −3 ≤ b ≤ 3 15′ 3
12CO (1–0) 115  −10 ≤ l ≤ 25 0b 30′c 65′ 4
12CO (1–0) 115  −12 ≤ l ≤ 13  −2 ≤ b ≤ 2 a 5
12CO (1–0) 115  −12 ≤ l ≤ 12  −5 ≤ b ≤ 5 4′ 6
12CO (2–1) 231  −3 ≤ l ≤ 3 0 9′ 7
12CO (2–1) 231  −6 ≤ l ≤ 6  −2 ≤ b ≤ 2 8
12CO (3–2) 345  −1.5 < l <  + 1.0  −0.2 < b <  + 0.2 34′′ 22′′ 9
13CO (1–0) 110  −5 ≤ l ≤ 5  −0.6 ≤ b ≤ 0.6 6′ 10
13CO (1–0) 110  −6 ≤ l ≤ 8  −1 ≤ b ≤ 1 2′ 6
13CO (2–1) 220  −1.5 ≤ l ≤ 3.25 0 8
C18O (1–0) 110  −1.05 ≤ l ≤ 3.6  −0.9 ≤ b ≤ 0.9 9′ 9′ 11
NH3 (1, 1)–(3, 3) 24  −2 ≤ l ≤ 2 0 12
SiO (1–0) 43  −0.8 ≤ l ≤ 0.9  −0.25 ≤ b ≤ 0.2 2′ 2′ 13
OH 1.7  −6 ≤ l ≤ 8  −1 ≤ b ≤ 1 12′ 10′ 14
H2CO 4.8 0.5 ≤ l ≤ 4  −0.5 ≤ b ≤ 0.9 3′ 3′ 15
CS (2–1) 98  −1 ≤ l ≤ 3.7  −0.4 ≤ b ≤ 0.4 1′ 2′ 10
HNCO(50,5–40,4) 110  −1.05 ≤ l ≤ 3.6  −0.9 ≤ b ≤ 0.9 9′ 9′ 11
HCN (1–0) 89  −0.2 ≤ l ≤ 0.7  −0.2 ≤ bd  ≤  0.1 2′ 2′ 16
HCN (1–0) 89  −2.15 ≤ l ≤ 2.15  −0.3 ≤ b ≤ 0.2 1′ 17
HCN (1–0) 89  −6 ≤ l ≤ 6  −0.8 ≤ b ≤ 0.87 4′e 1′ 18

References. 1) Burton & Liszt (1983); 2) Jaffe et al. (1996); 3) Nakagawa et al. (1995); 4) Bania (1986); 5) Bitran et al. (1997); 6) Fukui et al. (2006); 7) Oka et al. (1996); 8) Sawada et al. (2001); 9) Oka et al. (2007); 10) Bally et al. (1987); 11) Dahmen et al. (1997); 12) Morris et al. (1983); 13) Martín-Pintado et al. 1997, 2000; 14) Boyce & Cohen (1994); 15) Zylka et al. (1992); 16) Fukui et al. (1977); 17) Jackson et al. (1996); 18) Lee (1996).

Notes.

(a)

for  −1° ≤ l ≤ 1°;

(b)

also 4 strips in latitude at  ±10′ and  ±20′;

(c)

at b = 0, Δl = 6′;

(d)

few positions towards SgrB;

(e)

8′ in regions of weak emission.

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