2019ApJ...878....7M


Query : 2019ApJ...878....7M

2019ApJ...878....7M - Astrophys. J., 878, 7-7 (2019/June-2)

Near-infrared variability of low-mass stars in IC 1396A and Tr 37.

MENG H.Y.A., RIEKE G.H., KIM J.S., SICILIA-AGUILAR A., CROSS N.J.G., ESPLIN T., REBULL L.M. and HODAPP K.W.

Abstract (from CDS):

We have monitored nearly a square degree in IC 1396A/Tr 37 over 21 epochs extending over 2014-2016 for sources variable in the JHK bands. In our data, 65% ± 8% of previously identified cluster members show variations, compared with <=0.3% of field stars. We identify 119 members of Tr 37 on the basis of variability, forming an unbiased sample down to the brown dwarf regime. The K-band luminosity function in Tr 37 is similar to that of IC 348 but shifted to somewhat brighter values, implying that the K- and M-type members of Tr 37 are younger than those in IC 348. We introduce methods to classify the causes of variability, based on behavior in the color-color and color-magnitude diagrams. Accretion hot spots cause larger variations at J than at K with substantial scatter in the diagrams; there are at least a dozen, with the most active resembling EXors. Eleven sources are probably dominated by intervention of dust clumps in their circumstellar disks, with color behavior indicating the presence of grains larger than for interstellar dust, presumably due to grain growth in their disks. Thirteen sources have larger variations at K than at J or H. For 11 of them, the temperature fitted to the variable component is very close to 2000 K, suggesting that the changes in output are caused by turbulence at the inner rim of the circumstellar disk exposing previously protected populations of grains.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: planetary systems - infrared: stars - open clusters and associations: individual: Tr 37 - protoplanetary disks - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/ApJ/878/7): table3.dat table4.dat table5.dat table6.dat>

Status at CDS : Examining the need for a new acronym. // All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 117

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Number of rows : 117
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 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1390 1
2 V* GI Tau Or* 04 33 34.0609697160 +24 21 17.068989852 14.34   13.70 12.15 11.06 K5Ve 285 1
3 V* V1118 Ori TT* 05 34 44.9889538895 -05 33 41.344187987 15.053 15.378 14.430 15.22 12.701 M1e 144 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2311 0
5 NAME Ori A MoC 05 38 -07.1           ~ 2990 0
6 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 647 0
7 Ass Cyg OB 7 As* 21 08 +47.6           ~ 210 0
8 2MASS J21340974+5729550 * 21 34 09.7481138400 +57 29 55.017450852           ~ 3 0
9 2MASS J21344730+5731148 TT* 21 34 47.3044740792 +57 31 14.779047396           ~ 2 0
10 [SHB2004] Trumpler 37 81-541 TT* 21 35 17.4651628992 +57 48 22.331065968 20.511   17.605 16.086 14.598 K5.5 8 0
11 2MASS J21351804+5709441 TT* 21 35 18.0528152664 +57 09 44.082228420           ~ 2 0
12 [SHB2004] Trumpler 37 73-472 TT* 21 35 18.6202256232 +57 34 09.125950224     16.85 15.75 14.80 K5 14 0
13 [SHB2004] Trumpler 37 73-311 TT* 21 35 24.5179946904 +57 33 01.130080032     18.38 17.13 15.89 M1.5 12 0
14 [SHB2004] Trumpler 37 73-71 TT* 21 35 30.2234865456 +57 31 16.381628976 18.92   16.99 15.81 14.69 K6 10 0
15 2MASS J21354975+5724041 TT* 21 35 49.7603897328 +57 24 04.125200076 20.814   18.245 16.590 15.006 M0.5 11 0
16 2MASS J21355070+5703570 TT* 21 35 50.70 +57 03 57.1           ~ 2 0
17 NAME Elephant Trunk Nebula MoC 21 36 +57.4           ~ 51 0
18 2MASS J21360090+5707129 TT* 21 36 00.9021530232 +57 07 13.065361572           ~ 2 0
19 2MASS J21360723+5734324 TT* 21 36 07.2419800056 +57 34 32.432575008     17.30 16.27 15.25 G1.5 5 0
20 2MASS J21361281+5753004 TT* 21 36 12.8227173600 +57 53 00.443183352           ~ 2 0
21 [SHB2004] Trumpler 37 61-413 * 21 36 26.1525039048 +57 01 29.309119176           ~ 2 0
22 2MASS J21362676+5732374 TT* 21 36 26.77 +57 32 37.5     18.40 17.29 16.12 K6.5 5 0
23 EM* LkHA 349C TT* 21 36 49.4077187616 +57 31 21.971379612 19.219   15.81 14.508 13.094 K6 18 0
24 2MASS J21365579+5736533 TT* 21 36 55.8065608776 +57 36 53.300211192     17.81 16.74 15.74 K6 6 0
25 [MSR2009] IC1396A-38 TT* 21 36 57.6721143408 +57 27 33.140300940 18.684   16.92 15.211 13.999 K6 21 0
26 2MASS J21365850+5723257 TT* 21 36 58.5161923920 +57 23 25.803899592 17.755   15.340 14.040 13.094 K6 11 0
27 2MASS J21370088+5725224 TT* 21 37 00.8848297128 +57 25 22.449147060 20.155   17.046 15.625 15.12 K5 12 0
28 2MASS J21370140+5724458 TT* 21 37 01.4029083480 +57 24 45.845954460 21.062   17.854 16.185 14.85 M1.5 7 0
29 2MASS J21370191+5728222 TT* 21 37 01.917 +57 28 22.28 18.858   16.69 15.357 13.953 M1 12 0
30 2MASS J21370254+5726144 TT* 21 37 02.5534841256 +57 26 14.436852252 20.10   18.15 17.08 15.69 M2 7 0
31 2MASS J21370607+5732015 TT* 21 37 06.0768084720 +57 32 01.667503104 18.828   15.81 14.404 13.140 K7 10 0
32 [SHB2004] Trumpler 37 14-287 TT* 21 37 06.5040618744 +57 32 31.822462284 18.858   17.258 15.763 15.17 M0 11 0
33 [SHB2004] Trumpler 37 11-2037 TT* 21 37 07.0355466816 +57 27 00.832158108 18.871   16.03 15.09 13.687 K4.5 19 0
34 2MASS J21370843+5722484 TT* 21 37 08.4304318872 +57 22 48.351939204 21.635   17.860 16.361 15.71 M0.5 5 0
35 2MASS J21371031+5730189 TT* 21 37 10.3156968816 +57 30 18.973663920 20.899   17.653 16.170 14.77 M1.5 13 0
36 2MASS J21371054+5731124 TT* 21 37 10.5495135792 +57 31 12.452783268 19.896   16.74 15.224 14.70 K5 17 0
37 UCAC4 739-073649 Y*O 21 37 11.2443387528 +57 39 16.915051620   16.817 15.67 14.918 14.190 G 4 0
38 2MASS J21371183+5724486 TT* 21 37 11.8387672440 +57 24 48.581358336 20.988   17.17 15.595 14.76 K7.5 7 0
39 2MASS J21371215+5727262 TT* 21 37 12.1584693072 +57 27 26.272222596 20.850   17.72 15.853 14.605 K6.5 16 0
40 2MASS J21371498+5729123 TT* 21 37 14.98 +57 29 12.3     17.61 16.48 15.27 K7 6 0
41 2MASS J21371591+5726591 TT* 21 37 15.9198472632 +57 26 59.224079616 18.328   15.48 14.240 13.345 K2 17 0
42 2MASS J21371976+5731043 TT* 21 37 19.7804781528 +57 31 04.374104664 21.856   18.145 16.769 15.350 K7 7 0
43 2MASS J21372368+5731538 Y*O 21 37 23.6879639856 +57 31 53.886641412 19.544   17.07 15.583 15.00 K5.5 10 0
44 2MASS J21372732+5731295 TT* 21 37 27.3262872120 +57 31 29.573470560 20.23   16.91 15.84 14.83 K5 14 0
45 2MASS J21372828+5720326 Y*O 21 37 28.2896213664 +57 20 32.483618376 20.508   16.697 15.316 14.159 G 6 0
46 2MASS J21372894+5736042 TT* 21 37 28.9464951072 +57 36 04.409969472 20.719   18.399 16.874 15.226 M0 12 0
47 2MASS J21372915+5732534 TT* 21 37 29.1691948680 +57 32 53.608139844 21.054   17.14 16.100 14.99 K6.5 10 0
48 [SHB2004] Trumpler 37 11-1180 * 21 37 30.6133664568 +57 23 17.451960324     18.856 17.694 16.519 ~ 2 0
49 2MASS J21373420+5726154 TT* 21 37 34.2269407248 +57 26 15.491557284     17.55 16.47 15.43 ~ 7 0
50 2MASS J21373696+5755149 TT* 21 37 36.96 +57 55 14.9 21.040   17.056 15.455 14.077 M0.5 6 0
51 [SHB2004] Trumpler 37 14-183 Y*O 21 37 38.5106073936 +57 31 40.850378472 19.838   16.61 15.648 14.431 K7.0(K5) 15 0
52 [SHB2004] Trumpler 37 14-995 * 21 37 39.8854511664 +57 36 03.067549200           ~ 2 0
53 [SHB2004] Trumpler 37 11-1721 * 21 37 41.1439850688 +57 25 40.535966820     17.498 16.350 15.220 K5 2 0
54 2MASS J21374184+5740400 TT* 21 37 41.8497619272 +57 40 40.219508064 20.993   18.260 16.731 15.162 M1.5 9 0
55 [BVD2011] 50 TT* 21 37 42.7666018848 +57 33 25.152355368     17.48   15.25 F9 13 0
56 ATO J324.4370+57.4037 TT* 21 37 44.8876529352 +57 24 13.567003308 20.630   17.061 15.680 14.388 K6.5 12 0
57 [SHB2004] Trumpler 37 11-383 TT* 21 37 45.1515981504 +57 19 42.223645020     17.61 16.49 15.35 K5 12 0
58 2MASS J21374521+5728173 Y*O 21 37 45.2308533624 +57 28 17.360000796     18.00 16.87 15.66 M0 10 0
59 [BVD2011] 55 TT* 21 37 48.9494768160 +57 23 20.879850372           K5.0e 7 0
60 ATO J324.4591+57.5612 TT* 21 37 50.1984400008 +57 33 40.388385348 20.582   16.93 15.788 14.472 K5 15 0
61 2MASS J21375022+5725487 TT* 21 37 50.2362135960 +57 25 48.674517168 20.008   16.60 15.561 14.372 K6 11 0
62 2MASS J21375107+5727502 TT* 21 37 51.0843171120 +57 27 50.167494612 21.266   17.27 15.958 14.763 K5.5 13 0
63 2MASS J21375487+5726424 TT* 21 37 54.8796752832 +57 26 42.419990328 20.257   16.50 15.556 14.396 K6 7 0
64 2MASS J21375756+5724197 TT* 21 37 57.5736623760 +57 24 19.664947764 22.215   18.907 17.312 15.621 M0 11 0
65 [SHB2004] Trumpler 37 12-1091 TT* 21 37 57.6268205592 +57 22 47.639301456 19.710   16.274 14.984 13.984 G2.5 14 0
66 2MASS J21375812+5731199 TT* 21 37 58.1325430392 +57 31 19.921784592 19.666   16.95 15.332 14.65 K6.5 11 0
67 2MASS J21375827+5720354 TT* 21 37 58.27800 +57 20 35.4804 21.241   17.650 16.093 14.472 M0 6 0
68 2MASS J21375841+5718046 TT* 21 37 58.4184353568 +57 18 04.610093904     17.39 16.28 15.31 K4 6 0
69 2MASS J21375852+5735479 TT* 21 37 58.5320886864 +57 35 47.868720180           ~ 2 0
70 [SHB2004] Trumpler 37 13-1238 TT* 21 37 59.2566891816 +57 36 16.120800936 19.259   17.902 16.337 14.601 M1 12 0
71 2MASS J21380058+5728253 TT* 21 38 00.5956804056 +57 28 25.344974676 21.776   17.66 16.214 14.759 M1 10 0
72 2MASS J21380350+5741349 TT* 21 38 03.5014015944 +57 41 34.927818108 19.414   16.616 15.266 14.019 G9 16 0
73 2MASS J21380593+5722438 TT* 21 38 05.9514801216 +57 22 43.795884900 21.989   18.308 16.836 15.438 M0.5 9 0
74 2MASS J21380772+5735532 TT* 21 38 07.7241883728 +57 35 53.314245924 20.845   17.974 16.515 15.091 M0 10 0
75 2MASS J21380848+5725118 TT* 21 38 08.4853032408 +57 25 11.816318928 22.129   18.326 16.727 15.185 M1 8 0
76 [SHB2004] Trumpler 37 13-1426 TT* 21 38 08.5594089624 +57 37 07.644645480 19.858   19.174 17.599 15.748 M0 12 0
77 [BVD2011] 59 TT* 21 38 09.2558332296 +57 20 19.889766492           ~ 9 0
78 2MASS J21380928+5733262 TT* 21 38 09.28 +57 33 26.2 18.231   15.834 14.630 13.507 K1 11 0
79 2MASS J21380979+5729428 TT* 21 38 09.79 +57 29 42.8     18.79   16.83 ~ 6 0
80 [SHB2004] Trumpler 37 13-838 * 21 38 11.2135090800 +57 34 18.136479360           ~ 2 0
81 2MASS J21381384+5731414 TT* 21 38 13.8544471781 +57 31 41.366503365 21.078   18.463 16.880 15.470 M1 9 0
82 2MASS J21381509+5721554 TT* 21 38 15.1005258336 +57 21 55.500209028 19.56   16.83 15.82 14.84 K5.5 7 0
83 2MASS J21381612+5719357 TT* 21 38 16.1447590800 +57 19 35.739417144 21.026   18.564 16.922 15.120 M1 11 0
84 [SHB2004] Trumpler 37 13-1877 TT* 21 38 17.03 +57 39 26.6 18.883   17.189 15.620 14.222 K7 11 0
85 V* GM Cep Or* 21 38 17.3260136976 +57 31 22.013398272 15.016 16.40 13.146 12.090 11.117 F9 44 0
86 2MASS J21381749+5741019 TT* 21 38 17.4935818560 +57 41 02.010216120     17.54 16.40 15.35 K6.5 8 0
87 2MASS J21381750+5722308 TT* 21 38 17.5103916672 +57 22 30.806620716 20.088   16.689 15.373 14.235 K5.5 7 0
88 2MASS J21381862+5803283 TT* 21 38 18.6331618416 +58 03 28.443694320           ~ 2 0
89 ATO J324.6081+57.5692 TT* 21 38 25.9702287888 +57 34 09.345701676 19.128   16.423 15.173 14.008 K5.5 13 0
90 2MASS J21382668+5802377 TT* 21 38 26.6932585296 +58 02 37.844628576           ~ 2 0
91 2MASS J21382692+5726385 TT* 21 38 26.9292721296 +57 26 38.562874548 21.015   17.388 16.020 15.42 K6.5 8 0
92 [SHB2004] Trumpler 37 13-236 TT* 21 38 27.4355992128 +57 31 08.147300376 17.665   15.546 14.431 13.412 K2 17 0
93 [SHB2004] Trumpler 37 12-2113 TT* 21 38 27.4440026385 +57 27 20.637220350 18.79   17.14 16.019 14.67 K6 14 0
94 2MASS J21382804+5730464 TT* 21 38 28.0689027312 +57 30 46.385959608 18.588   16.768 15.320 14.012 K5.5 12 0
95 2MASS J21382834+5731072 TT* 21 38 28.3567652112 +57 31 07.213192032 21.118   17.428 16.087 14.657 M0 9 0
96 [BVD2011] 72 TT* 21 38 32.1705111120 +57 26 35.904618708 21.598   19.911 18.202 16.287 M0 9 0
97 2MASS J21383255+5730161 TT* 21 38 32.5587514296 +57 30 16.082958780     17.27 16.18 15.15 K7 10 0
98 2MASS J21383382+5726053 TT* 21 38 33.8262941592 +57 26 05.223577740     19.23 17.85 16.52 M0 5 0
99 2MASS J21383470+5741274 TT* 21 38 34.7174096016 +57 41 27.416989464     18.31 16.94 15.52 M2.5 8 0
100 2MASS J21383481+5732500 TT* 21 38 34.8149099544 +57 32 49.974279000 20.977   18.030 16.555 14.959 K5.5 9 0
101 2MASS J21384001+5739303 TT* 21 38 40.018 +57 39 30.34     18.16 17.06 15.89 M0 8 0
102 2MASS J21384038+5738374 TT* 21 38 40.3790414328 +57 38 37.486973868 20.832   16.878 15.591 14.381 K5.5 10 0
103 2MASS J21384332+5718359 TT* 21 38 43.3334283240 +57 18 35.956910268 20.014   16.58 15.195 14.277 K5 10 0
104 2MASS J21384350+5727270 TT* 21 38 43.5074776872 +57 27 27.054319284 24.093   19.918     M2 9 0
105 2MASS J21384446+5718091 TT* 21 38 44.4751678176 +57 18 09.091587744 18.539   16.571 15.299 14.437 K5.5 17 0
106 2MASS J21384544+5728230 Or* 21 38 45.4347801216 +57 28 22.966547916 21.420   17.552 16.36 15.05 M0.5 7 0
107 2MASS J21384622+5720380 TT* 21 38 46.23 +57 20 38.0 22.047   19.512 17.497 16.144 K7 6 0
108 ATO J324.6961+57.4057 TT* 21 38 47.0726403144 +57 24 20.718265284 20.814   17.042 15.601 14.382 K7 9 0
109 2MASS J21385029+5722283 TT* 21 38 50.3038555011 +57 22 28.227225989 20.896   18.554 17.043 15.463 M2 7 0
110 2MASS J21385253+5727184 TT* 21 38 52.5463490328 +57 27 18.382917636 22.178   18.775 17.18 15.73 M2.5 5 0
111 2MASS J21385504+5720423 TT* 21 38 55.04 +57 20 42.3           G8.0 3 0
112 2MASS J21385542+5735299 TT* 21 38 55.4327715144 +57 35 29.841262296 18.64   16.04 15.11 14.23 K4 8 0
113 HD 206267 SB* 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 498 0
114 2MASS J21385807+5743343 TT* 21 38 58.0791715416 +57 43 34.422069684 19.777   17.141 15.732 14.546 K6.5 14 0
115 IC 1396 OpC 21 38 58.8 +57 30 50           ~ 495 1
116 Ass Cep OB 2 As* 21 51 +60.0           ~ 294 0
117 NGC 7160 OpC 21 53 48 +62 35.3   6.34 6.1     ~ 234 0

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