2015AJ....150..132R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:41:30

2015AJ....150..132R - Astron. J., 150, 132 (2015/October-0)

Near-infrared variability in the Orion Nebula Cluster.

RICE T.S., REIPURTH B., WOLK S.J., VAZ L.P. and CROSS N.J.G.

Abstract (from CDS):

Using UKIRT on Mauna Kea, we have carried out a new near-infrared J, H, K monitoring survey of almost a square degree of the star-forming Orion Nebula Cluster with observations on 120 nights over three observing seasons, spanning a total of 894 days. We monitored ∼15,000 stars down to J≈ 20 using the WFCAM instrument, and have extracted 1203 significantly variable stars from our data. By studying variability in young stellar objects (YSOs) in the H - K, K color-magnitude diagram, we are able to distinguish between physical mechanisms of variability. Many variables show color behavior indicating either dust-extinction or disk/accretion activity, but we find that when monitored for longer periods of time, a number of stars shift between these two variability mechanisms. Further, we show that the intrinsic timescale of disk/accretion variability in young stars is longer than that of dust-extinction variability. We confirm that variability amplitude is statistically correlated with evolutionary class in all bands and colors. Our investigations of these 1203 variables have revealed 73 periodic AA Tau type variables, many large-amplitude and long-period (p > 15 days) YSOs, including three stars showing widely spaced periodic brightening events consistent with circumbinary disk activity, and four new eclipsing binaries. These phenomena and others indicate the activity of long-term disk/accretion variability processes taking place in young stars. We have made the light curves and associated data for these 1203 variables available online.

Abstract Copyright:

Journal keyword(s): infrared: stars - stars: formation - stars: pre-main sequence - stars: variables: T Tauri, Herbig Ae/Be

VizieR on-line data: <Available at CDS (J/AJ/150/132): table2.dat table4.dat table5.dat table6.dat table7.dat>

Nomenclature: Table 2: [RRW2015] NNNN (Nos 1-1227).

Simbad objects: 55

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Number of rows : 55

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 348 OpC 03 44 34 +32 09.8           ~ 1236 1
2 V* RY Tau Or* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 653 1
3 V* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 935 1
4 V* AA Tau Or* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 635 0
5 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 717 0
6 V* V385 Ori Or* 05 33 33.9062470183 -05 33 26.451407533   14.10 16.06   13.50 M3.2 17 0
7 ESO-HA 834 Y*O 05 33 34.4356073223 -05 14 17.565019700     16.45   14.00 ~ 14 0
8 Haro 4-294 Em* 05 33 35.7076821444 -05 09 23.468496977     16.87   14.16 ~ 9 0
9 V* VY Ori Or* 05 33 35.8807763471 -05 01 32.484070483   16.00 14.90   13.09 ~ 41 0
10 GEN# +9.00011203 * 05 33 36.3622808371 -05 01 40.438513539   17.74 16.35     ~ 4 0
11 V* V725 Ori Or* 05 33 37.0534400774 -05 23 06.878358465     16.22 16.18 13.89 M3 12 0
12 V* HU Ori Or* 05 33 37.2510066793 -05 26 52.765320869   12.38       ~ 17 0
13 Haro 4-98 Y*O 05 33 38.5651489195 -05 13 12.386591847     16.75   14.26 M3.5 17 0
14 Haro 4-121 Y*O 05 33 41.6778190703 -05 24 04.164734107     16.23 16.35 13.92 ~ 17 0
15 V* V730 Ori Or* 05 33 44.7225226442 -05 21 03.966125634   14.88 13.79 13.54   F9V: 14 0
16 V* V386 Ori Or* 05 33 44.9361715981 -05 31 08.470916784   16.80 15.22 14.82   K7V: 18 0
17 V* VZ Ori Or* 05 33 45.2606785383 -05 30 49.756973826     13.50   11.77 K1 40 0
18 V* V726 Ori Or* 05 33 45.4588932354 -05 36 32.381076622     18.04   14.34 M5.5 24 0
19 V* V1896 Ori Or* 05 33 45.8786637580 -05 32 58.066540333           ~ 6 0
20 V* V1667 Ori Or* 05 33 46.0932628351 -05 34 26.385856088   15.86 14.58 14.30 12.34 K8 13 0
21 V* V1897 Ori Or* 05 33 46.68600 -05 23 25.6128     18.9     ~ 17 0
22 V* V1898 Ori Or* 05 33 47.6684535958 -05 25 48.593311606     17.23   14.16 ~ 13 0
23 2MASS J05334797-0527385 Y*O 05 33 47.9757960956 -05 27 38.354215309           M6: 6 0
24 V* V1900 Ori Or* 05 33 48.2238323474 -05 13 26.113428307     16.74   14.48 ~ 19 0
25 2MASS J05334918-0523023 Em* 05 33 49.1851114606 -05 23 02.286987999     17.80   14.68 M5 6 0
26 V* V354 Ori Or* 05 33 49.5461162326 -05 36 20.854840397     16.20   14.12 ~ 18 0
27 V* V1902 Ori Or* 05 33 50.7428298036 -05 00 39.413539727     17.48   14.77 ~ 16 0
28 V* V1916 Ori Or* 05 34 02.0648245350 -05 17 25.519081118     21.665   17.305 ~ 5 0
29 V* V1174 Ori Or* 05 34 27.8535605060 -05 41 37.876152541 16.506 15.070 14.305   12.367 M0 49 0
30 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2013 1
31 2MASS J05350571-0523540 Y*O 05 35 05.7174446392 -05 23 54.067127182   18.356 17.345   13.665 M5-M6 29 0
32 V* V2187 Ori Or* 05 35 08.7063841993 -05 31 27.537570131     21.57 20.58 18.102 ~ 21 0
33 V* V2212 Ori Al* 05 35 11.1412127665 -05 36 51.210193000 18.461 16.619 15.379   12.444 M2 49 0
34 2MASS J05351214-0531388 Y*O 05 35 12.1463732749 -05 31 38.821108760 19.716 18.292 17.169 15.68 13.554 M5 52 0
35 V* V1501 Ori Or* 05 35 15.5536588458 -05 25 14.150036747   15.163 14.077   11.527 K4-M1 53 0
36 * tet01 Ori E SB* 05 35 15.7719090349 -05 23 09.890008011           G2IV 86 0
37 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1483 1
38 M 42 HII 05 35 17.3 -05 23 28           ~ 3751 0
39 2MASS J05351802-0522052 EB* 05 35 18.0305971884 -05 22 05.395532385     19.06   14.694 K0-K3 29 0
40 V* AF Ori Or* 05 35 18.6662798791 -05 23 13.945021737         12.526 K2-K5e 49 0
41 V* V2384 Ori Al* 05 35 21.8463185314 -05 46 08.560286991       19.21 17.28 M7 89 1
42 2MASS J05360595-0500413 EB* 05 36 05.9517832423 -05 00 41.273509940           ~ 5 0
43 2MASS J05362022-0514214 EB* 05 36 20.2142242189 -05 14 21.818961087         18.180 ~ 3 0
44 2MASS J05365393-0525550 EB* 05 36 53.935 -05 25 55.04           ~ 1 0
45 V* V2716 Ori Or* 05 36 54.9739551315 -04 58 19.945194086           ~ 3 0
46 V* V1775 Ori Or* 05 36 55.4330272325 -05 26 00.176138972         13.68 M2 7 0
47 NAME Ori A MoC 05 38 -07.1           ~ 2697 0
48 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1602 1
49 V* V582 Mon TT* 06 41 10.3403654169 +09 28 33.490089193   17.404   17.21 16.45 K5e 167 0
50 VSSG 26 Y*O 16 27 18.48720 -24 29 05.9136           ~ 83 0
51 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 185 0
52 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3063 0
53 Kepler-16b Pl 19 16 18.1759181246 +51 45 26.777781114           ~ 113 1
54 NGC 7000 HII 20 58 47 +44 19.8           ~ 365 1
55 Ass Cyg OB 7 As* 21 08 +47.6           ~ 194 0

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:41:30

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