. Author manuscript; available in PMC: 2020 Sep 15.

Published in final edited form as: Astrophys J. 2017 Apr 21;839(2):108. doi: 10.3847/1538-4357/aa6575

Table 5.

Source Classification Summary

Type	Number of Objects
Type	W51	W43
Class I	302	917
Class II	1101	4993
Transition Disks	77	194
Embedded protostars	56	144
Faint Class I^a	100	303
Faint Class II^a	1618	4549
Faint Transition Disk^a	35	46
Class III/Photospheres	157, 165	429, 895
AGB candidates	180	866
Other^b	524	1416
Unclassified	124, 094	198, 409
Total	285, 252	641, 732

Notes.

These are the YSO candidates with lower confidence.

Includes PAH emission-dominated sources, H₂ shock emission-dominated sources, broadline AGN candidates, and PAH galaxy candidates. Unclassified sources lack detection in four bands (either HK_S, IRAC 1 and 2, or IRAC 1, 2, 3, and 4) or a bright MIPS 24 μm detection.