Galactic distributions of carbon- and oxygen-rich AGB stars revealed by the AKARI mid-infrared all-sky survey

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Table 1

Classification of the AKARI/MIR catalogue sources.

Group	Representative population	Number of members
	(Definition in SIMBAD^a)	[J] − [K] vs. [K] − [9]		[K] − [9] vs. [9] − [18]		[J] − [K] vs. [9] − [18]
		known^b	total^c	known^b	total^c	known^b	total^c

A	YSOs (YSO, TT∗, HII)	1, 302	81, 802	776	17, 369	776	5, 588
B	Emission line stars (Be∗, Em∗, WR∗)	1, 984	1, 644	744	-^d	744	1,493
C	Normal stars (O–M dwarfs & giants; ∗)	167, 829	288, 597	35, 117	36, 906	35, 117	27, 836
D	S-stars (S∗)	852	205, 255	461	17, 454	461	20, 973
E	C-rich AGBs (C∗)	5, 197	202, 252	3, 037	13, 944	3, 037	18, 596
F	O-rich AGBs (OH∗, AB∗)	1, 193	30, 711	745	71, 190	745	83, 012
G	Post-AGBs & PNe (pA∗, PN)	836	6, 858	670	1, 762	670	2, 076
H	Galaxies (G, EmG, H2G, rG, LSB,	1, 323	2, 735	744	3, 977	744	3, 028
	LIN, Sy2, Sy1, AGN, SyG)

Notes.

^(a)

Abbreviated expressions for object types used in the SIMBAD database. We assign ambiguous objects to each class. For example, the objects labeled as C∗? (carbon star candidate) are included in group E.

^(b)

The number of known objects in the SIMBAD database.

^(c)

The number of objects in the occupation zone defined in this work.

^(d)

Emission-line stars cannot be separated clearly on the [K] − [9] vs. [9] − [18] diagram.

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