2008AJ....135..966F

Query : 2008AJ....135..966F

2008AJ....135..966F - Astron. J., 135, 966-983 (2008/March-0)

Evidence for early circumstellar disk evolution in NGC 2068/71.

FLAHERTY K.M. and MUZEROLLE J.

Abstract (from CDS):

We study the disk and accretion properties of young stars in the NGC 2068 and NGC 2071 clusters. Using low-resolution optical spectra, we define a membership sample and determine an age for the region of ∼2 Myr. Using high-resolution spectra of the Hα line we study the accretion activity of these likely members and also examine the disk properties of the likely members using IRAC and MIPS mid-infrared photometry. A substantial fraction (79%) of the 67 members have an infrared excess while all of the stars with significant infrared excess show evidence for active accretion. We find three populations of evolved disks (IRAC weak, MIPS weak, and transition disks) all of which show decreased accretion activity in addition to the evidence for evolution in the dust disk.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - ISM: individual (NGC 2068, NGC 2071) - planetary systems: protoplanetary disks - stars: formation - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/135/966): table1.dat table2.dat table3.dat table4.dat>

Nomenclature: Text: [FM2008] NGC 2068-2071 Cluster N=1. Table 2: [FM2008] NNNN N=69 among (Nos 17-1643).

Simbad objects: 88

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Number of rows : 88
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
2 NAME Taurus Cluster OpC 04 24 03.905 +26 53 24.40           ~ 79 0
3 V* DM Tau Or* 04 33 48.7336763736 +18 10 09.973460280 14.30 14.82 14.00     M2Ve 731 0
4 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
5 CoKu Tau-Aur Star 4 TT* 04 41 16.8104181312 +28 40 00.073831728   16.40 14.68 14.59   M1.5e 187 0
6 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 797 0
7 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
8 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
9 * sig Ori Y*O 05 38 44.7653828520 -02 36 00.283179888 2.54 3.58 3.79 3.87 4.11 O9.5V+B0.2V(n) 855 0
10 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
11 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
12 2MASS J05452137-0000459 TT* 05 45 21.3790838784 -00 00 45.788024088           M3 7 0
13 2MASS J05452268-0014274 TT* 05 45 22.6856197008 -00 14 27.461791212           M6 6 0
14 2MASS J05452616+0006379 TT* 05 45 26.1620022360 +00 06 37.900371564           M3 18 0
15 ZTF J054538.26-000811.0 TT* 05 45 38.2666255248 -00 08 11.047027344           M0 19 0
16 2MASS J05454167-0004024 TT* 05 45 41.6776293840 -00 04 02.419124448           M4 21 0
17 2MASS J05454194-0012053 TT* 05 45 41.9508842448 -00 12 05.424975396           K5.5 28 0
18 Kiso A-0904 170 TT* 05 45 44.3760205920 +00 22 58.260162900   16.91 15.77 15.51   M1 20 0
19 2MASS J05454691+0014293 TT* 05 45 46.9191298944 +00 14 29.291723232           M4.5 6 0
20 KHA 174 TT* 05 45 53.1173374176 -00 13 25.004747784   18.00 16.73     M1 29 0
21 EM* RJHA 9 TT* 05 45 53.5552860072 +00 33 08.764993764     17.5     M2 16 0
22 2MASS J05455360+0022420 TT* 05 45 53.6030935536 +00 22 42.093619176           K7 7 0
23 2MASS J05455619+0033103 TT* 05 45 56.2016748024 +00 33 10.226392632           M5.5 4 0
24 2MASS J05455631+0007085 TT* 05 45 56.3186248680 +00 07 08.515164252           K7.5 23 0
25 EM* LkHA 296 TT* 05 45 57.3896595552 +00 20 22.172250300   16.5 15.7     K7 26 0
26 2MASS J05455793+0002485 TT* 05 45 57.9305218392 +00 02 48.608540160           M4.5 9 0
27 EM* LkHA 297 TT* 05 46 00.1784237136 +00 03 07.049171628   18.5       M4 17 0
28 2MASS J05460457+0000381 TT* 05 46 04.5780377400 +00 00 38.058768216           M2 18 0
29 EM* LkHA 298 TT* 05 46 04.63704 +00 04 58.1484   16.88 15.42 14.82 13.32 K6 30 0
30 HBC 502 TT* 05 46 07.8799942272 -00 11 56.887013256     14.5     K3 56 0
31 EM* LkHA 299 TT* 05 46 09.27000 +00 13 32.6136   17.16 15.45 15.61   M1 17 0
32 2MASS J05461186+0032259 Or* 05 46 11.8695187200 +00 32 25.836551232           K2 21 0
33 2MASS J05461447+0020243 TT* 05 46 14.4893643528 +00 20 24.331348860           M4 10 0
34 2MASS J05461829+0006578 TT* 05 46 18.2992725000 +00 06 57.780058968           K5.5 24 0
35 V* V2764 Ori TT* 05 46 18.8940183048 -00 05 38.169480768   15.3 14.4     K7 28 0
36 EM* LkHA 300 TT* 05 46 19.0551946080 +00 03 29.485773036   18.0       K6 31 0
37 EM* LkHA 301 TT* 05 46 19.4689575480 -00 05 20.030650836   15.4 14.6     K2.5 46 0
38 2MASS J05462087+0008094 TT* 05 46 20.8775190240 +00 08 09.307184676           K8 19 0
39 EM* LkHA 302 TT* 05 46 22.4333214840 -00 08 52.633597092     15.1     K2 44 0
40 2MASS J05462298+0004264 TT* 05 46 22.9902233760 +00 04 26.478857172           M2 18 0
41 2MASS J05462588+0009319 TT* 05 46 25.8853260600 +00 09 31.896703764           M3.5 22 0
42 2MASS J05462665+0031074 TT* 05 46 26.6574243480 +00 31 07.448902752           K7 21 0
43 2MASS J05462783+0005483 TT* 05 46 27.8428142688 +00 05 48.439687200           M2.5 15 0
44 2MASS J05462900+0029071 TT* 05 46 29.0033397816 +00 29 07.158689772           M1.5 14 0
45 2MASS J05463005+0012096 TT* 05 46 30.0600239496 +00 12 09.609575688           M1.5 21 0
46 IRAS F05439+0024 TT* 05 46 31.0591924104 +00 25 33.743738820           M4.5 19 0
47 2MASS J05463328+0002518 TT* 05 46 33.2898861264 +00 02 51.958926024           K4 29 0
48 [SSC75] M 78 4 TT* 05 46 34.5412520330 +00 06 43.455792806           K4 13 0
49 2MASS J05463489+0004206 TT* 05 46 34.9036243488 +00 04 20.760705660           M4 21 0
50 EM* LkHA 304 TT* 05 46 37.0684320048 +00 01 21.882730224     16     K5.5 31 0
51 2MASS J05463856+0022059 TT* 05 46 38.5703780736 +00 22 06.041892576           M1 19 0
52 2MASS J05464017+0005018 TT* 05 46 40.1821308024 +00 05 01.919062140           M1 5 0
53 2MASS J05464076+0027225 TT* 05 46 40.76784 +00 27 22.5108           M3 14 0
54 2MASS J05464384+0015323 TT* 05 46 43.8478594872 +00 15 32.287272444           M2 16 0
55 2MASS J05464408+0018031 TT* 05 46 44.0933464440 +00 18 03.081565728           K5 17 0
56 2MASS J05464483+0016597 TT* 05 46 44.8407868536 +00 16 59.793729240           M1 19 0
57 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
58 2MASS J05464687+0009076 TT* 05 46 46.8763599936 +00 09 07.682257080     17.0     M0 24 0
59 NAME LDN 1630N Cl* 05 46 47.0 +00 09 50           ~ 15 1
60 2MASS J05465148+0019213 TT* 05 46 51.4828777824 +00 19 21.330627240           M3.5 19 0
61 2MASS J05465241+0020016 TT* 05 46 52.4159850048 +00 20 01.665353868           K9 22 0
62 2MASS J05465653+0020529 TT* 05 46 56.5399723560 +00 20 52.925072460           K3 8 0
63 2MASS J05465803+0014278 TT* 05 46 58.0376324376 +00 14 27.844115784           M3 16 0
64 2MASS J05465813+0005381 TT* 05 46 58.1440932144 +00 05 38.319048636           M0 18 0
65 2MASS J05470397+0011143 TT* 05 47 03.9815243712 +00 11 14.267802876           M2 25 0
66 2MASS J05470494+0018316 TT* 05 47 04.9440069192 +00 18 31.643991936           M1.5 7 0
67 2MASS J05470534+0028461 TT* 05 47 05.3327657472 +00 28 46.065821196           M3 6 0
68 EM* LkHA 307 TT* 05 47 06.00168 +00 32 08.4804     17.5     K0 26 0
69 EM* LkHA 309 TT* 05 47 06.9688378728 +00 00 47.643863076     14.7     K4.5 38 0
70 2MASS J05470698+0031559 TT* 05 47 06.9865570776 +00 31 55.962366060           M1 18 0
71 EM* LkHA 308 TT* 05 47 07.2632601168 +00 19 32.170074348   18.0 15.9     M0 26 0
72 ZTF J054708.69+000013.9 TT* 05 47 08.6992836504 +00 00 13.945803012           M3 15 0
73 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
74 2MASS J05471089+0032059 TT* 05 47 10.8913812312 +00 32 05.958204864           M1.5 17 0
75 EM* LkHA 310 TT* 05 47 10.9810095480 +00 19 14.765040480   18.0 15.6     G6 28 0
76 EM* LkHA 313 TT* 05 47 13.84752 +00 00 17.0532       14.70   M1 22 0
77 EM* LkHA 314 TT* 05 47 14.1132479736 +00 09 07.305335676   14.90 13.8     Ke 35 0
78 2MASS J05471658-0000563 TT* 05 47 16.5922471848 -00 00 56.415059604           M4 18 0
79 2MASS J05471716+0018246 TT* 05 47 17.1639225216 +00 18 24.549942276     18.5     M1 19 0
80 EM* LkHA 315 TT* 05 47 17.2763802792 +00 38 21.341609592     15.3     K7 27 0
81 2MASS J05471972+0001218 TT* 05 47 19.7297149200 +00 01 21.797963148           M5 9 0
82 2MASS J05472504+0031049 TT* 05 47 25.049 +00 31 04.95           K7 3 0
83 2MASS J05475753+0011312 TT* 05 47 57.5287070328 +00 11 31.132586436           M4 5 0
84 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
85 NGC 2362 OpC 07 18 41.9 -24 57 08           ~ 428 0
86 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
87 BAX 258.1082-23.3759 ClG 17 12 26.3 -23 21 38           ~ 303 0
88 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1

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