2021ApJ...916L..20L

Query : 2021ApJ...916L..20L

2021ApJ...916L..20L - Astrophys. J., 916, L20-L20 (2021/August-1)

AGB interlopers in YSO catalogs hunted out by NEOWISE.

LEE J.-E., LEE S., LEE S., SUH K.-W., CHO S.-H., BYUN D.-Y., PARK W., HERCZEG G., CONTRERAS PENA C. and JOHNSTONE D.

Abstract (from CDS):

Asymptotic giant branch stars (AGBs) and young stellar objects (YSOs) often share the same domains in infrared (IR) color-magnitude or color-color diagrams leading to potential misclassification. We extracted a list of AGB interlopers from the published YSO catalogs using the periodogram analysis on the Near-Earth Object Wide Infrared Survey Explorer (NEOWISE) time series data. YSO IR variability is typically stochastic and linked to episodic mass accretion. Furthermore, most variable YSOs are at an early evolutionary stage, with significant surrounding envelope and/or disk material. In contrast, AGBs are often identified by a well-defined sinusoidal variability with periods of a few hundreds days. From our periodogram analysis of all known low-mass YSOs in the Gould Belt, we find 85 AGB candidates, out of which 62 were previously classified as late-stage Class III YSOs. Most of these new AGB candidates have similar IR colors to O-rich AGBs. We observed 73 of these AGB candidates in the H2O, CH3OH, and SiO maser lines to further reveal their nature. The SiO maser emission was detected in 10 sources, confirming them as AGBs because low-mass YSOs, especially Class III YSOs, do not show such maser emission. The H2O and CH3OH maser lines were detected in none of our targets.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Asymptotic giant branch stars

Simbad objects: 85

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Number of rows : 85
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4418 0
2 V* TX Cam Mi* 05 00 51.1627935408 +56 10 54.041462220       14.02   M9-9.5 350 0
3 M 42 HII 05 35 17 -05 23.4           ~ 4077 0
4 HOPS 137 Y*O 05 38 53.95 -07 02 33.2           ~ 9 0
5 2MASS J05420932-0209501 Y*O 05 42 09.3277213368 -02 09 50.268566700           ~ 9 0
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3631 1
7 2MASS J16330156-2403555 LP* 16 33 01.5596606952 -24 03 55.686628260           ~ 7 0
8 2MASS J18031385-0428451 AB? 18 03 13.8582811032 -04 28 45.258710844           ~ 4 0
9 IRAS 18078-0238 AB* 18 10 28.9065623688 -02 37 42.684586932           O-rich 6 1
10 2MASS J18163160-0309450 LP* 18 16 31.6100477376 -03 09 45.026248536           ~ 4 0
11 2MASS J18210795-0305332 AB? 18 21 07.9530785928 -03 05 33.206080992           ~ 4 0
12 2MASS J18214037-0318335 LP* 18 21 40.3799028816 -03 18 33.620770944           ~ 4 0
13 IRAS 18196-0306 LP* 18 22 11.9871635376 -03 05 08.188659960         13.52 ~ 4 0
14 IRAS 18197-0257 LP* 18 22 21.0104039520 -02 55 33.420372420         12.78 ~ 3 0
15 2MASS J18232315-0313504 LP* 18 23 23.1617345664 -03 13 50.505849048           ~ 4 0
16 IRAS 18215-0301 LP* 18 24 15.0893427144 -03 00 09.873467712           ~ 4 0
17 IRAS 18233-0341 LP* 18 25 59.4944899968 -03 39 40.923613044           ~ 4 0
18 2MASS J18260437-0356344 LP? 18 26 04.3862516352 -03 56 34.257391728           ~ 4 0
19 2MASS J18263789-0245511 AB? 18 26 37.8948147552 -02 45 51.267582036           ~ 4 0
20 IRAS 18246-0413 Mi* 18 27 21.1784845646 -04 11 57.850295355         16.14 ~ 5 0
21 2MASS J18272388-0346072 Y*? 18 27 23.884 -03 46 07.29           ~ 3 0
22 2MASS J18274661-0123304 LP* 18 27 46.6197081528 -01 23 30.466372920           ~ 4 0
23 2MASS J18281203-0334546 LP? 18 28 12.0343470552 -03 34 54.510975228           ~ 4 0
24 IRAS 18257-0407 Mi* 18 28 20.7895621440 -04 05 27.723276456         15.28 ~ 5 0
25 2MASS J18285699-0259552 LP* 18 28 56.9993386200 -02 59 55.258433484           ~ 3 0
26 2MASS J18290071-0233303 LP* 18 29 00.7209485592 -02 33 30.340122012           ~ 4 0
27 2MASS J18290113-0334222 LP* 18 29 01.1363500320 -03 34 22.184140116           ~ 4 0
28 2MASS J18290809-0007372 Y*O 18 29 08.1049067928 -00 07 37.281788868           M4: 8 0
29 2MASS J18291856-0145091 Y*? 18 29 18.5619954144 -01 45 09.092689416           ~ 3 0
30 2MASS J18292748-0239484 LP* 18 29 27.4922619840 -02 39 48.452562900           ~ 5 0
31 2MASS J18292824-0022573 Y*O 18 29 28.24 -00 22 57.4           ~ 16 1
32 2MASS J18293585-0338129 Y*? 18 29 35.8581763632 -03 38 12.876788184           ~ 3 0
33 IRAS 18270-0316 LP* 18 29 42.3796314528 -03 14 59.614642644         17.36 ~ 4 0
34 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1100 2
35 V* V371 Ser Or* 18 29 51.21240 +01 16 39.4860           ~ 119 1
36 2MASS J18300619-0202196 Y*O 18 30 06.197 -02 02 19.60           ~ 6 0
37 IRAS 18275-0122 LP* 18 30 08.9964735504 -01 20 19.796293788         14.63 ~ 3 0
38 2MASS J18301368-0248129 LP* 18 30 13.6788793704 -02 48 12.895558200           ~ 4 0
39 2MASS J18303314-0220581 Y*? 18 30 33.149 -02 20 58.19           ~ 5 0
40 IRAS 18279-0232 AB* 18 30 35.5927788960 -02 30 35.401956084           O-rich 4 0
41 2MASS J18303637-0306014 Y*? 18 30 36.380 -03 06 01.42           ~ 2 0
42 NAME Aql Region reg 18 31.1 -02 10           ~ 391 0
43 2MASS J18311610-0125126 Mi* 18 31 16.1114587632 -01 25 12.824160240         14.891 ~ 5 0
44 2MASS J18312042-0307402 LP* 18 31 20.4162196992 -03 07 40.426948092           ~ 4 0
45 2MASS J18312292-0154242 Y*? 18 31 22.927 -01 54 24.22           ~ 5 0
46 2MASS J18312491-0152318 Y*? 18 31 24.912 -01 52 31.86           ~ 5 0
47 IRAS 18290-0114 LP* 18 31 36.6728638272 -01 12 11.714543568           ~ 5 0
48 2MASS J18313857-0150254 Y*? 18 31 38.5686658728 -01 50 25.625540328           ~ 5 0
49 2MASS J18315622-0241513 Y*? 18 31 56.2276619904 -02 41 51.359839440           ~ 3 0
50 2MASS J18315902-0224146 Y*? 18 31 59.0272710384 -02 24 14.800632732           ~ 5 0
51 NAME Aql Rift DNe 18 32 -01.0           ~ 316 1
52 2MASS J18320070-0141159 AB? 18 32 00.7007592600 -01 41 15.969835140           ~ 4 0
53 2MASS J18320359-0110579 Y*? 18 32 03.5981306448 -01 10 58.025836848           ~ 3 0
54 2MASS J18321383-0138394 Y*? 18 32 13.8458744640 -01 38 39.563152476           ~ 3 0
55 2MASS J18323365-0248179 Y*? 18 32 33.6552418872 -02 48 17.991520416           ~ 3 0
56 IRAS 18299-0200 LP* 18 32 34.0321130736 -01 58 36.840674460         17.99 ~ 6 0
57 2MASS J18323609-0205245 LP* 18 32 36.0955121304 -02 05 24.482387256           ~ 6 0
58 2MASS J18323902-0236130 Y*? 18 32 39.0222695040 -02 36 13.013609940           ~ 3 0
59 2MASS J18323994-0130096 Y*? 18 32 39.9418050240 -01 30 09.625317732           ~ 3 0
60 IRAS 18301-0141 Mi* 18 32 49.0798743024 -01 39 19.984779180         16.830 ~ 5 0
61 2MASS J18330171-0238545 LP? 18 33 01.7247401208 -02 38 54.558689820           ~ 4 0
62 IRAS 18305-0231 LP* 18 33 06.4856535768 -02 29 05.581253652           ~ 4 0
63 2MASS J18330994-0128589 LP? 18 33 09.9513435912 -01 28 59.100427956           ~ 4 0
64 2MASS J18331745-0236252 Y*? 18 33 17.4595047048 -02 36 25.373050308           ~ 3 0
65 2MASS J18332005-0132058 LP* 18 33 20.0560903536 -01 32 05.857993824           ~ 4 0
66 2MASS J18332082-0247578 Mi* 18 33 20.8284905736 -02 47 57.871841244         17.175 ~ 5 0
67 2MASS J18364114+0019148 Mi* 18 36 41.1466309392 +00 19 14.860179264         16.017 ~ 4 0
68 2MASS J18364228+0009153 Y*? 18 36 42.2676480693 +00 09 15.416783011           ~ 3 0
69 2MASS J18373324+0005439 Y*? 18 37 33.246 +00 05 43.90           ~ 3 0
70 2MASS J18374209+0016519 LP* 18 37 42.0950918880 +00 16 52.028190372           ~ 5 0
71 IRAS 18353+0020 OH* 18 37 55.79376 +00 23 31.5708           ~ 7 0
72 2MASS J18380869+0020593 LP? 18 38 08.6941238952 +00 20 59.414345484           ~ 4 0
73 IRAS 18361-0001 LP* 18 38 43.5763772112 +00 01 28.585964820           ~ 4 0
74 2MASS J18385109-0018522 LP? 18 38 51.0945892392 -00 18 52.289551188           ~ 4 0
75 2MASS J18385577-0023407 Y*? 18 38 55.777 -00 23 40.78           ~ 4 0
76 IRAS 18369+0002 Mi* 18 39 31.6943382840 +00 04 57.825439320         16.262 ~ 5 0
77 2MASS J18393567+0002321 Y*? 18 39 35.6660584296 +00 02 32.187935436           ~ 3 0
78 2MASS J18394022+0001383 Y*? 18 39 40.227 +00 01 38.35           ~ 3 0
79 IRAS 18370-0004 AB* 18 39 40.6242757752 -00 01 26.506670772           M6 7 0
80 2MASS J18395440+0004144 LP* 18 39 54.4040972832 +00 04 14.476320984           ~ 4 0
81 2MASS J18401125+0014469 Y*? 18 40 11.2507987776 +00 14 46.738141116           ~ 3 0
82 2MASS J18402584+0018224 LP* 18 40 25.8458398128 +00 18 22.450103388           ~ 4 0
83 EM* AS 501 LP* 22 57 40.9715428128 +58 49 12.529058124   15.258 12.516 11.201   M2II-III 113 0
84 NAME Gould Belt PoG ~ ~           ~ 874 1
85 NAME Galactic Bulge reg ~ ~           ~ 4299 0

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