An ALCHEMI inspection of sulphur-bearing species towards the central molecular zone of NGC 253

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Volume 689 (September 2024)

A&A, 689 (2024) A64

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Table 1.

Selected regions where the S-bearing species’ emission peaks, their coordinates, and their position within the CMZ.

Region	RA (ICRS)	Dec (ICRS)	Position
	(00^h47^m)	(−25°:17′)	(O/I)
GMC10	34 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 2360	07 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 836	O
GMC9a	34 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 1227	11 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 702	O
GMC8a	33 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 9359	10 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 905	O
GMC7	33 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 6432	13 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 272	I
GMC6	33 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 3312	15 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 756	I
SSC5	32 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 9811	19 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 710	I
SSC2	32 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 8199	21 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 240	I
GMC2b	32 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 3398	18 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 869	O
GMC1b	32 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 0835	25 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 510	O
GMC1a	31 $\overset{s}{.}$ $\overset{\text{ s}}{.}$ 9363	29 $\overset{″}{.}$ $\overset{\prime \prime }{.}$ 018	O

Notes. The letter ‘I’ stands for a position in the inner CMZ whilst ‘O’ stands for a position in the outer CMZ (see text).

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