2010A&A...523A..45R


Query : 2010A&A...523A..45R

2010A&A...523A..45R - Astronomy and Astrophysics, volume 523, A45-45 (2010/11-2)

A survey of the Galactic Center region in HCO+, H13CO+, and SiO.

RIQUELME D., BRONFMAN L., MAUERSBERGER R., MAY J. and WILSON T.L.

Abstract (from CDS):

A large-scale survey of the Galactic center region in the 3mm rotational transitions of SiO, HCO+ and H13CO+ (beamsize ∼3.6') was conducted to provide an estimate of cloud conditions, heating mechanisms, chemistry, and other properties. Using the NANTEN 4m telescope from Nagoya University, a region between -5.75<l<5.6deg and -0.68<b<1.3deg was mapped in the J=1-0 lines of HCO+ and H13CO+ and in the J=2-1 line of SiO with a spacing of 3.75' (HCO+) and 1.875' (SiO and H13CO+). Velocity channel maps, longitude-velocity maps, and latitude-velocity maps are presented. We identify 51 molecular clouds; 33 of them belong to the Galactic center and 18 to disk gas. We derive an average of the luminosity ratio of SiO(J=2-1)/CO(J=1-0) in clouds belonging to the Galactic center of 4.9x10–3 and for disk clouds of 3.4x10–3. The luminosity ratio of HCO+(J=1-0)/CO(J=1-0) in the Galactic center is 3.5x10–2, and for disk clouds it is 1.5x10–2. We can distinguish clearly between regions where the SiO or HCO+ dominate.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: molecules - Galaxy: center - surveys

Nomenclature: Table 2: [RBM2010] M+L.L+B.b N=5. Table 3: [RBM2010] NN (Nos 1-51).

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3048 2
2 NAME Crux Arm PoG 12 30 -60.0           ~ 86 0
3 NAME Nor Arm PoG 16 00 -50.0           ~ 363 0
4 [RBM2010] M-5.3+0.4 MoC 17 31.7 -33 14           ~ 2 0
5 [RBM2010] M-4.4+0.6 MoC 17 32.4 -32 28           ~ 2 0
6 [RBM2010] M-3.8+0.9 MoC 17 32.8 -31 41           ~ 2 0
7 NAME Sgr E Rad 17 42 38 -29 48.2           ~ 47 0
8 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 327 0
9 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 926 0
10 GCM -0.13 -0.08 MoC 17 45 25.2 -29 05 30           ~ 116 1
11 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12381 0
12 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3709 3
13 GCM -0.02 -0.07 MoC 17 45 50.4 -28 59 06           ~ 154 0
14 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 201 0
15 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2032 1
16 NAME 1.5 Complex MoC 17 48 22 -27 48.3           ~ 11 0
17 NAME Sgr D MoC 17 48 41.75 -28 01 45.0           ~ 125 1
18 [RBM2010] M+3.2+0.3 MoC 17 51.7 -26 13           ~ 2 0
19 [RBM2010] M+5.3-0.3 MoC 17 59.0 -24 27           ~ 2 0
20 NAME Galactic Bulge reg ~ ~           ~ 3656 0

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2021.09.21-14:09:36

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