2017AJ....154...29K


Query : 2017AJ....154...29K

2017AJ....154...29K - Astron. J., 154, 29-29 (2017/July-0)

Characterizing the stellar population of NGC 1980.

KOUNKEL M., HARTMANN L., CALVET N. and MEGEATH T.

Abstract (from CDS):

NGC 1980 is a young cluster that is located about 0.°5 south of the Orion Nebula Cluster (ONC). Recent studies by Bouy et al. and Pillitteri et al. have suggested that NGC 1980 contains an older population of stars compared to a much younger ONC, and that it belongs to a foreground population that may be located in front of the Orion A molecular gas by as much as 40 pc. In this work, we present low-resolution spectra toward 148 young stars found toward the NGC 1980 region. We determine the spectral types of these stars, examine accretion signatures and measure the extinction toward them. We determine that based on these observations, the age of the population of NGC 1980 is indistinguishable from L1641, estimated to be ∼3 Myr, comparable with the study by Fang et al.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: individual objects: NGC 1980 - stars: pre-main sequence - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/154/29): table1.dat>

Simbad objects: 159

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Number of rows : 159
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 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
2 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
3 2MASS J05340284-0605508 TT* 05 34 02.8438724280 -06 05 50.717844240     19.047   15.853 M4.7 9 0
4 V* V1923 Ori Or* 05 34 05.9881134648 -06 06 11.731907520     18.805   15.661 M4.6 17 0
5 V* V1115 Ori TT* 05 34 07.5230692416 -06 04 46.399099584     16.337   13.930 M2.6 18 0
6 V* V742 Ori TT* 05 34 13.4697154128 -05 55 41.682214884     16.73   14.18 M2.7e 31 0
7 [BAB2014] 338495 * 05 34 16.2021358704 -05 56 38.119713612           M8.8 1 0
8 2MASS J05341889-0559298 TT* 05 34 18.8979491664 -05 59 29.866408836     18.14     M3.2e 11 0
9 2MASS J05341995-0608545 TT* 05 34 19.9529199744 -06 08 54.578308596     17.580   14.859 M3.2 9 0
10 2MASS J05342025-0558156 TT* 05 34 20.2594073928 -05 58 15.598481304     17.00   14.17 M4.7e 22 0
11 V* V752 Ori Or* 05 34 25.8864248976 -06 03 51.895936044     18.455   15.20 M4.7 11 0
12 ESO-HA 939 Em* 05 34 27.1582143792 -05 48 03.699917316     18.09     M4.5 9 0
13 2MASS J05342785-0556281 * 05 34 27.8635742808 -05 56 28.137856632     17.58     M4.6 9 0
14 2MASS J05342883-0609504 TT* 05 34 28.8344872872 -06 09 50.412547692     19.67     M5.0e 8 0
15 V* V935 Ori TT* 05 34 29.6045732904 -05 47 24.699265656         14.01694 M1.9e 43 0
16 V* V1683 Ori Or* 05 34 30.9696430368 -05 58 03.615476088         15.53 M6.5e 22 0
17 2MASS J05343140-0601546 Y*? 05 34 31.4086486512 -06 01 54.674394888     19.917   16.230 M5.1 8 0
18 V* V1436 Ori TT* 05 34 33.0156640392 -05 57 47.020888044   18.01 16.27   14.01 M0.0e 20 0
19 2MASS J05343360-0611194 TT* 05 34 33.6080234904 -06 11 19.391519508     18.849   15.630 M4.8 17 0
20 V* V756 Ori TT* 05 34 33.8707265784 -05 56 38.097348900     17.11   14.25 M4.2e 22 0
21 V* V1982 Ori Or* 05 34 33.9654265656 -05 48 24.959400696     17.91   14.94 M4.4 16 0
22 V* V760 Ori TT* 05 34 34.2553853952 -06 02 09.690661032     16.97   14.45 M2.8 37 0
23 2MASS J05343744-0554269 * 05 34 37.4499043224 -05 54 26.994445992     19.32   15.97 M8.6 9 0
24 ESO-HA 977 Em* 05 34 37.5124057704 -05 57 34.351057764     19.05   16.01 M6.2 9 0
25 2MASS J05343795-0546105 * 05 34 37.9484239776 -05 46 10.686568620     18.9     M4.9e 9 0
26 Haro 4-322 TT* 05 34 38.5563006816 -05 47 35.157089256   16.0 15.3     M0.8e 15 0
27 V* V981 Ori TT* 05 34 39.7212421656 -06 07 13.191587184   17.4 16.29   13.96867 M3.5 28 0
28 V* V1690 Ori Or* 05 34 39.8711569992 -06 08 34.073530440     16.712   13.79 M2.7 29 0
29 2MASS J05344100-0548049 * 05 34 41.0011205088 -05 48 04.997935116     18.25     M4.8 9 0
30 2MASS J05344110-0547394 Or* 05 34 41.1033316392 -05 47 39.485128164     17.75   14.98 M9.5 13 0
31 V* XY Ori TT* 05 34 41.1778249728 -05 46 11.733478572     16.03   14.03495 M2.2e 51 0
32 2MASS J05344125-0552455 TT* 05 34 41.2597333320 -05 52 45.609853620     18.55   15.59 M6.4 11 0
33 2MASS J05344199-0545005 TT* 05 34 41.9899508976 -05 45 00.662761872     19     M5.4e 16 0
34 2MASS J05344244-0543255 TT* 05 34 42.4425662736 -05 43 25.608032220     18.42   15.21 M4.7e 17 0
35 V* IZ Ori TT* 05 34 43.022976 -05 44 40.16904   16.58 15.90   14.38 M0.6e 38 0
36 V* V1442 Ori TT* 05 34 44.4464403480 -05 56 14.946100620     17.12   14.55 M1.5 20 0
37 [BAB2014] 358064 TT* 05 34 44.5563619896 -05 54 15.162697440           M5.7e 2 0
38 2MASS J05344550-0554203 TT* 05 34 45.5034629352 -05 54 20.458878804     18.08   15.21 M4.4e 11 0
39 2MASS J05344589-0548123 * 05 34 45.8955047760 -05 48 12.421732392     17.26   14.70 M3.6 15 0
40 2MASS J05344612-0605320 TT* 05 34 46.1238084720 -06 05 32.054137188     16.40   14.15 M1.9 26 0
41 2MASS J05344695-0552204 * 05 34 46.9573683288 -05 52 20.541929556     18.26   15.18 M5.0 8 0
42 V* V774 Ori Or* 05 34 47.529552 -05 46 30.25812   17.08 15.61 14.82 13.51599 M1.3e 36 0
43 2MASS J05344897-0607449 TT* 05 34 48.9754967256 -06 07 44.971266108     16.244   13.951 M2.1 19 0
44 V* V400 Ori TT* 05 34 49.104360 -05 46 05.03508   17.24 15.87 15.54 13.71757 M1.0e 37 0
45 2MASS J05344980-0544548 * 05 34 49.8096494472 -05 44 55.060466820     18.81     M6.6 6 0
46 2MASS J05345001-0553335 TT* 05 34 50.0063259240 -05 53 33.607633380     19.88   16.42 M5.6e 6 0
47 2MASS J05345000-0553040 Y*O 05 34 50.0084063304 -05 53 04.194165372     17.78   14.67 M5.0e 16 0
48 2MASS J05345152-0603443 TT* 05 34 51.5304189288 -06 03 44.341800840     16.01   13.80 M3.5e 12 0
49 V* V1457 Ori TT* 05 34 51.75384 -05 39 24.1164     16.42   13.75834 M3.0e 34 0
50 ESO-HA 1054 Or* 05 34 53.1293403648 -05 47 42.608567832     18.34   15.61 M4.3 15 0
51 Haro 4-330 TT* 05 34 53.3049428544 -05 54 05.369998212     16.84   14.32591 M3.8e 24 0
52 2MASS J05345349-0556035 TT* 05 34 53.4916995912 -05 56 03.665302692     19.53     M5.1e 5 0
53 CXORRS J053453.5-054345 * 05 34 53.5929257400 -05 43 45.864359400     20.09     M5.4 4 0
54 CXORRS J053453.6-054511 Em* 05 34 53.6912492520 -05 45 11.281175496     18.33   15.20 M8.0 11 0
55 V* V552 Ori Or* 05 34 54.9046383168 -05 47 09.048572340     19.27   16.07 M5.8 15 0
56 V* ZZ Ori Or* 05 34 54.9105861720 -05 46 44.056036668     14.06   12.85392 K6.4e 45 0
57 2MASS J05345519-0557100 * 05 34 55.1935233816 -05 57 10.140709500           M5.8e 3 0
58 V* V1710 Ori TT* 05 34 55.6385324256 -06 01 03.720264132     15.88   13.39 M3.1 30 0
59 V* V1467 Ori TT* 05 34 56.2679967576 -06 04 17.395550004   17.39 15.886   13.96256 M0.8 39 0
60 2MASS J05345640-0538052 Or* 05 34 56.4000111264 -05 38 05.296170156 19.805 18.305 17.170   13.996 M5 42 0
61 2MASS J05345712-0603168 * 05 34 57.1264299432 -06 03 16.917930108           M6.5e 5 0
62 V* V1471 Ori TT* 05 34 57.2371313232 -05 42 02.921225508 19.368 17.976 16.835   14.003 M1.9e 44 0
63 2MASS J05345767-0548191 Y*O 05 34 57.6784616784 -05 48 19.245210120     18.49   15.73 M4.0 4 0
64 V* V784 Ori TT* 05 34 57.9387911016 -05 53 21.791254092     16.42   13.86 M4.1e 22 0
65 2MASS J05345805-0553429 * 05 34 58.0577469000 -05 53 43.003669848     17.97   15.07 M4.8 13 0
66 2MASS J05345821-0549346 TT* 05 34 58.2100368816 -05 49 34.767810984     17.44   14.62 M3.0 24 0
67 2MASS J05345886-0547067 Y*O 05 34 58.8613578240 -05 47 06.828422892           M5.2 11 0
68 2MASS J05345918-0541125 Y*O 05 34 59.1871306488 -05 41 12.676955640 19.823 20.650 20.014   16.738 M3.5e 9 0
69 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
70 2MASS J05350025-0602144 Y*O 05 35 00.2535936048 -06 02 14.483035968           M5.5e 6 0
71 V* V787 Ori TT* 05 35 01.3641229608 -05 55 54.848827344   16.00 14.90   13.13095 M0.0e 31 0
72 2MASS J05350160-0554187 TT* 05 35 01.6035540408 -05 54 18.856188720           M6.1 10 0
73 [RHS2000] 1-1015 Y*O 05 35 01.6073265456 -05 58 21.803080080     17.42   14.80 M5.3 13 0
74 2MASS J05350278-0544429 TT* 05 35 02.7870719808 -05 44 43.010891736     19.37     M5.2 12 0
75 V* V788 Ori TT* 05 35 02.9348528256 -06 05 25.242799164   15.8 15.85   13.81245 M2.0 42 0
76 V* V1717 Ori TT* 05 35 03.0391772064 -05 45 33.388224948     18.63   14.96 M3.1 28 0
77 2MASS J05350351-0551589 * 05 35 03.5130748080 -05 51 59.075678736     18.64   15.81 M4.9 10 0
78 [RHS2000] 1-1046 Y*O 05 35 04.0645578744 -05 48 54.230622120     17.12 16.01 14.50 M4.7 15 0
79 2MASS J05350451-0555255 TT* 05 35 04.5180161016 -05 55 25.688714196     18.25   15.18 M5.2e 11 0
80 2MASS J05350479-0600209 TT* 05 35 04.7991815520 -06 00 20.887753968           M0.4 13 0
81 V* V2148 Ori TT* 05 35 05.0719878768 -05 36 43.860593376   18.969 17.869   14.195 M4.5 53 0
82 2MASS J05350567-0543046 Y*O 05 35 05.6795791944 -05 43 04.755847944     19.269 17.59 15.508 M4.6e 12 0
83 2MASS J05350608-0552393 TT* 05 35 06.0880346544 -05 52 39.356859792           M4.6e 7 0
84 2MASS J05350670-0558113 Y*? 05 35 06.7081810824 -05 58 11.386990128     16.87   14.44 M3.2e 12 0
85 Haro 4-345 TT* 05 35 08.0552381112 -05 53 43.488023424     15.6   13.48589 M1.6e 22 0
86 2MASS J05350837-0554417 TT* 05 35 08.3822470776 -05 54 41.742823500           M4.9e 10 0
87 2MASS J05350856-0553513 TT* 05 35 08.5667905872 -05 53 51.371851128           M4.2e 6 0
88 Haro 4-346 Y*O 05 35 08.9965642992 -05 58 17.111987256   15.9 14.85   12.96 M0.9 22 0
89 SOXS 178 * 05 35 10.4863938085 -05 52 18.986200052           M4.3e 3 0
90 [RHS2000] 1-1098 TT* 05 35 10.6293963528 -06 01 44.784673248     16.94   14.45 M3.2 27 0
91 2MASS J05351088-0549485 Y*O 05 35 10.8805334256 -05 49 48.587776572       17.45 15.75 M3.9e 11 0
92 [RHS2000] 1-1106 TT* 05 35 11.1118044360 -06 00 21.670256808     17.43   14.55 M4.3 31 0
93 V* V1490 Ori Or* 05 35 11.9277625872 -05 45 37.961132760   15.8 15.23 14.21 13.27967 M1.5 37 0
94 2MASS J05351283-0555263 TT* 05 35 12.8315809008 -05 55 26.421199572           M4.2e 17 0
95 V* LY Ori Or* 05 35 13.7686568496 -05 39 10.120117644 15.686 14.487 13.614   11.765 K7.1e 51 0
96 2MASS J05351443-0554266 TT* 05 35 14.4414292392 -05 54 26.665602732         15.44340 M4.3e 20 0
97 V* V409 Ori TT* 05 35 14.8822414632 -05 38 05.578913472 19.549 18.193 17.028   14.248 K8 44 0
98 V* V1500 Ori TT* 05 35 14.9157584400 -05 36 39.208112784   18.496 17.358   14.065 M2.6e 38 0
99 V* V1499 Ori Or* 05 35 14.9366190960 -05 56 36.202473636     17.2   14.91293 M4.4e 23 0
100 2MASS J05351493-0549348 TT* 05 35 14.9426554776 -05 49 34.785465456     13.97 13.80 13.60 M2.5e 14 0
101 ESO-HA 1153 Em* 05 35 15.2833206456 -05 56 08.564863488           M3.3 8 0
102 2MASS J05351529-0539562 TT* 05 35 15.3073352712 -05 39 56.268838908 19.973 18.354 17.145   13.607 M3.7e 30 0
103 NGC 1980 OpC 05 35 15.5 -05 55 46     2.5     ~ 132 0
104 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
105 [BAB2014] 376660 Em* 05 35 16.8223974792 -05 39 17.066444112   20.845 19.544   15.077 M4.5e 13 0
106 ESO-HA 1168 TT* 05 35 16.95216 -05 45 55.8144     17.17 16.01 14.21 M5.8e 24 0
107 V* V1507 Ori Or* 05 35 17.1615141888 -05 41 53.968149708 20.063 19.263 18.153 16.44 14.472 M4.4e 37 0
108 2MASS J05351867-0554064 Y*O 05 35 18.6773348520 -05 54 06.428092248           M2.8 26 0
109 V* V2335 Ori Or* 05 35 18.6777890520 -05 41 09.636710352     21.467   16.196 M8.2 17 0
110 2MASS J05351870-0603275 TT* 05 35 18.7086545832 -06 03 27.614199528     19.303   15.793 M4.7 11 0
111 NAME OMC 3 Stellar Group Cl* 05 35 19 -05 02.1           ~ 6 0
112 [R2001] 1925 TT* 05 35 19.0394743800 -05 46 16.342395960     16.26 15.18 13.81 M3.0e 9 0
113 2MASS J05351914-0604377 TT* 05 35 19.1565240312 -06 04 37.765780392     17.29   14.45 M4.2 18 0
114 V* V1732 Ori Or* 05 35 19.8250964544 -05 45 40.969388628     16.92 15.73 13.77 M4.4e 24 0
115 2MASS J05352021-0546510 TT* 05 35 20.2198960944 -05 46 51.085099992     15.72 14.63 13.39 M2.7e 24 0
116 V* V2366 Ori Or* 05 35 20.2947805728 -05 46 39.951179364     16.30 15.13 13.98395 M3.0e 20 0
117 V* V1734 Ori Or* 05 35 21.3203498328 -05 56 36.001923180         14.13 M5.5 30 0
118 Haro 4-355 Em* 05 35 21.3311824392 -05 53 51.793289016     13.7 14.38   M0.7 27 0
119 Haro 4-359 TT* 05 35 21.4741669920 -05 57 42.187836816     15.9     M3.5 24 0
120 2MASS J05352154-0602415 * 05 35 21.5523696912 -06 02 41.676349236     19.98     M6.8 3 0
121 2MASS J05352326-0603010 Y*O 05 35 23.2741843104 -06 03 01.113363540     19.17   16.10 M4.4 11 0
122 NGC 1981 OpC 05 35 24.4 -04 29 58     4.2     ~ 99 0
123 NAME OMC 2 Cluster Cl* 05 35 25 -05 10.3           ~ 6 0
124 V* V2432 Ori Or* 05 35 25.2083184024 -05 55 55.305253416       15.43 13.56 M5.3 16 0
125 V* V1534 Ori Or* 05 35 25.3782343008 -05 53 21.563034576     15.7     M4.5 33 0
126 * iot Ori SB* 05 35 25.9861932063 -05 54 35.598684624 1.45 2.53 2.77     O9IIIvar 793 0
127 [BAB2014] 381182 TT* 05 35 26.0103748440 -06 01 39.785902464     17.27     M3.3e 11 0
128 V* V2446 Ori Or* 05 35 26.1724331760 -05 45 08.575807284     16.05 14.99 14.05373 M2.9e 39 0
129 2MASS J05352634-0543364 Y*O 05 35 26.3470544376 -05 43 36.570028728       18.17 16.23 M5.0 5 0
130 2MASS J05352802-0557438 * 05 35 28.0263831072 -05 57 43.881345000           M4.9 6 0
131 2MASS J05352877-0541339 TT* 05 35 28.7801634768 -05 41 34.074348360   19.079 17.885   14.717 M3.1e 12 0
132 V* V1551 Ori Or* 05 35 29.3108719104 -05 45 38.213334252     16.91 15.80 14.37 M5.3 28 0
133 2MASS J05353044-0605007 TT* 05 35 30.4502059608 -06 05 00.884223276     19.68   16.47 M5.5 15 0
134 V* V2490 Ori Or* 05 35 30.4802656368 -05 49 03.775262304     16.50 15.46 14.32572 M2.3e 32 0
135 Haro 4-370 TT* 05 35 31.8136949016 -06 06 29.452080096   17.53 16.068   13.419 M3.2 22 0
136 2MASS J05353299-0558029 TT* 05 35 32.9952964776 -05 58 03.014698260     16.43   14.15 M2.0e 23 0
137 V* V1744 Ori Or* 05 35 33.1590982656 -05 47 07.434196944     16.72 15.69 14.01 M3.9 40 0
138 ESO-HA 1293 TT* 05 35 33.5765496144 -06 02 20.392408716     16.52   13.78 M3.7 25 0
139 2MASS J05353372-0546162 TT* 05 35 33.7219656576 -05 46 16.278243420     16.98 16.03 14.63 M3.4e 12 0
140 V* V804 Ori Or* 05 35 33.8497532400 -05 38 20.710822308   18.716 17.580   14.413 M3.5 34 0
141 2MASS J05353438-0605427 TT* 05 35 34.3896175416 -06 05 42.784465092     16.15   13.34 M4.3 19 0
142 V* V2548 Ori TT* 05 35 35.9470341908 -05 38 42.829004966   18.733 17.551   14.285 M3.7e 36 0
143 2MASS J05353610-0556533 TT* 05 35 36.1107458832 -05 56 53.292950340           M4.7e 17 0
144 2MASS J05353843-0552456 TT* 05 35 38.4342325368 -05 52 45.664978872           M5.4e 13 0
145 [BAB2014] 387551 * 05 35 38.4434747616 -05 56 23.856782352           M5.8e 1 0
146 2MASS J05354055-0558261 TT* 05 35 40.5552161928 -05 58 26.179755168           M5.1e 5 0
147 2MASS J05354185-0552295 TT* 05 35 41.8540380888 -05 52 29.542152792           M4.7e 18 0
148 2MASS J05354250-0540574 * 05 35 42.5010872304 -05 40 57.420598008   21.987 20.682   16.512 M4.9 7 0
149 V* V2599 Ori Or* 05 35 47.6855914368 -05 58 06.095944020     18.68   15.47 M5.2e 17 0
150 2MASS J05354915-0556182 TT* 05 35 49.1528748024 -05 56 18.305342988           M3.2e 7 0
151 2MASS J05354923-0559142 TT* 05 35 49.2404512632 -05 59 14.245534644     18.00   15.18 M4.3e 10 0
152 V* V817 Ori Or* 05 35 53.0790497664 -05 59 48.040623600     17.3     M3.4e 13 0
153 ESO-HA 1394 Em* 05 35 54.6758845152 -05 54 36.695321064           M3.6e 8 0
154 2MASS J05355597-0542262 Em* 05 35 55.9714482144 -05 42 26.253491220   19.012 17.757   14.615 M3.1e 16 0
155 V* V816 Ori Or* 05 35 56.1819925176 -05 52 28.466268708     15.7   14.42122 M2.1e 22 0
156 V* V1591 Ori TT* 05 35 58.9755342528 -05 59 08.520127692     16.63   14.47340 M3.0e 38 0
157 2MASS J05360087-0601304 * 05 36 00.8768987040 -06 01 30.365181228     20.19     M5.3 3 0
158 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
159 LDN 1641 MoC 05 39.0 -07 00           ~ 502 0

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