2011A&A...530A.150F


Query : 2011A&A...530A.150F

2011A&A...530A.150F - Astronomy and Astrophysics, volume 530A, 150-150 (2011/6-1)

XMM-Newton observations of the young open cluster around λ Orionis.

FRANCIOSINI E. and SACCO G.G.

Abstract (from CDS):

We studied the X-ray properties of the young (∼1-8Myr) open cluster around the hot (O8III) star λ Ori and compared them with those of the similarly-aged σ Ori cluster to investigate possible effects of the different ambient environment. We analysed an XMM-Newton observation of the cluster using EPIC imaging and low-resolution spectral data. We studied the variability of detected sources, and performed a spectral analysis of the brightest sources in the field using multi-temperature models. We detected 167 X-ray sources, of which 58 are identified with known cluster members and candidates, from massive stars down to low-mass stars with spectral types ∼M5.5. Another 23 sources were identified with new possible photometric candidates. Late-type stars have a median logLX/Lbol~-3.3, close to the saturation limit. Variability was observed in ∼35% of late-type members or candidates, including six flaring sources. The emission from the central hot star λ Ori is dominated by plasma at 0.2-0.3keV, with a weaker component at 0.7keV, consistently with a wind origin. The coronae of late-type stars can be described by two plasma components with temperatures T1∼0.3-0.8keV and T2∼0.8-3keV, and subsolar abundances Z∼0.1-0.3Z, similar to what is found in other star-forming regions and associations. No significant difference was observed between stars with and without circumstellar discs, although the smallness of the sample of stars with discs and accretion does not allow us to draw definitive conclusions. The X-ray properties of λ Ori late-type stars are comparable to those of the coeval σ Ori cluster, suggesting that stellar activity in λ Ori has not been significantly affected by the different ambient environment.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: λ Orionis - stars: activity - stars: coronae - stars: late-type - stars: pre-main sequence - X-rays: stars

VizieR on-line data: <Available at CDS (J/A+A/530/A150): tablea1.dat table1.dat table2.dat tablea2.dat>

Nomenclature: Table A.1: LOX NNN (Nos 1-167).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 148

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Number of rows : 148
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 IC 348 OpC 03 44 32 +32 09.5           ~ 1321 1
2 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1299 0
3 * 32 Ori ** 05 30 47.05091 +05 56 53.2925 3.51 4.07 4.20 4.26 4.40 B5IV+B7V 184 0
4 2MASS J05340691+1001005 Y*O 05 34 06.9109579925 +10 01 00.476569515       11.44   ~ 12 0
5 [BNM2013] 54.01 448 LM* 05 34 08.5420134024 +09 50 43.447819452       18.67 16.81 M6.0 9 0
6 [BNM2013] 54.01 250 LM* 05 34 11.5768376664 +09 49 14.987841852 22.056 19.5 18.9 17.59 16.09 M5.0 11 0
7 [BNM2013] 52.03 839 LM* 05 34 14.2471662672 +09 48 26.353814976       19.30 17.45 M5.5 9 0
8 [BNM2013] 54.01 352 LM* 05 34 17.5815822144 +09 52 29.709488496       18.58 16.75 M6.0 10 0
9 2MASS J05341927+0948275 Y*? 05 34 19.2710413992 +09 48 27.359378136       20.34 18.21 M7.0 10 0
10 2MASS J05341980+0954206 LM* 05 34 19.806 +09 54 20.60       21.79 19.31 M8.0 7 0
11 LOri-CFHT 123 * 05 34 20.47 +10 05 22.4           ~ 2 0
12 2MASS J05342182+1004148 * 05 34 21.8149969224 +10 04 14.790127548 18.133 15.8 15.1 13.83 13.05 ~ 9 0
13 2MASS J05342915+0947072 Y*? 05 34 29.1491519496 +09 47 07.067580540 22.490     19.99 17.82 ~ 6 0
14 [BNM2013] 54.01 149 LM* 05 34 29.5255795632 +09 48 58.133099196 18.254 16.3 15.4 13.72 12.78 M1.5 9 0
15 [DM99] 9 Y*O 05 34 32.8248699774 +09 59 30.848986025 17.309   14.21 13.46 12.77 K9 17 0
16 [BNM2013] 52.04 474 LM* 05 34 33.5292506376 +09 43 55.411494348       18.72 16.87 M6.5 8 0
17 [BNM2013] 54.01 234 LM* 05 34 33.7649186376 +09 55 34.145899680 21.655     17.54 16.09 M5.0 11 0
18 HD 245059 Y*O 05 34 34.9060262317 +10 07 06.329811125   10.71 9.926   8.865 G8e 40 0
19 [BNM2013] 54.01 507 LM* 05 34 35.4318523704 +09 51 18.495132876 22.674     19.31 17.38 ~ 9 0
20 [DM99] 11 Y*O 05 34 35.6086768200 +09 59 43.325429640 19.859   16.42 15.25 13.93 M3.5 21 0
21 [BNM2013] 54.01 281 LM* 05 34 35.8519063056 +09 54 26.484820128 23.429     18.01 16.18 M4.0 11 0
22 [DM99] 12 Y*O 05 34 36.2358939480 +09 53 44.151520488 19.023   15.91 14.77 13.53 M2.5 16 0
23 LOri-CFHT 156 LM* 05 34 36.28 +09 55 32.2       22.05 19.59 M8.0 9 0
24 [BNM2013] 54.01 134 LM* 05 34 36.7256083752 +09 52 58.339853580 20.772 19.5 18.2 16.08 14.72 M4.5 10 0
25 2MASS J05343836+0958116 Y*? 05 34 38.3645421000 +09 58 11.551413216       20.06 17.92 ~ 7 0
26 [DM99] 14 Y*O 05 34 39.2075054342 +09 52 55.291058437 18.037   15.09 14.17 13.31 ~ 18 0
27 [DM99] 16 Y*O 05 34 39.8031125520 +10 06 21.998979432 19.234   16.08 15.02 13.86 M1.5 13 0
28 [BNM2013] 54.01 276 LM* 05 34 41.1935611944 +09 50 16.153496088       17.82 16.21 M5.5 13 0
29 [BNM2013] 54.04 331 LM* 05 34 43.1744667168 +10 01 59.646779688 22.935     18.03 16.28 M5.5 10 0
30 [BNM2013] 54.01 126 LM* 05 34 43.9666748808 +09 48 35.392881384 21.958     16.89 15.20 M5.5 14 0
31 [BNM2013] 54.01 122 LM* 05 34 44.6622739776 +09 53 57.951589812 18.985 17.7 16.1 13.84 13.01 K9 9 0
32 [BNM2013] 54.04 400 LM* 05 34 45.5916884112 +10 05 48.804872460 22.678     18.14 16.42 M5.25 8 0
33 2MASS J05344621+0955376 Y*? 05 34 46.2087186672 +09 55 37.674919704 22.271     19.23 17.34 M5.5 10 0
34 2MASS J05344631+1002318 Y*? 05 34 46.3136301384 +10 02 31.811686224 22.620     18.80 17.08 M5.0 9 0
35 LOri-CFHT 9 * 05 34 46.3408042080 +10 06 35.778951180 17.807 15.9 15.1 13.70 12.95 ~ 8 0
36 [BNM2013] 54.01 113 LM* 05 34 46.8185839152 +09 50 37.699148184 21.728 19.3 18.6 16.84 15.28 M5.5 13 0
37 [DM99] 18 Y*O 05 34 47.2504853328 +10 02 42.871258716 16.800   14.01 13.25 12.51 ~ 14 0
38 [BNM2013] 52.04 179 LM* 05 34 48.0239135616 +09 43 26.121663552 21.954 19.4 18.5 16.76 15.20 M4.5 10 0
39 [BNM2013] 54.04 328 LM* 05 34 48.2580098208 +09 59 53.870541432 21.899     17.51 16.00 M6.5 13 0
40 [DM99] 19 Y*O 05 34 48.4577220696 +09 57 15.623657136 18.856   15.79 14.93 13.73 ~ 13 0
41 [DM99] 20 Y*O 05 34 49.0145866656 +09 58 02.083986120 19.490   16.27 15.11 13.79 M3.5 17 0
42 [BNM2013] 54.04 327 LM* 05 34 49.5003416280 +09 58 46.779771504       17.78 16.10 M5.5 10 0
43 [DM99] 22 Y*O 05 34 50.4506533512 +09 51 47.511377028 18.969   15.58 14.7 13.75 ~ 14 0
44 4C 09.21 Rad 05 34 50.73 +10 04 30.0           ~ 6 0
45 [BNM2013] 54.04 323 LM* 05 34 55.2208979952 +10 00 34.702086240 21.054     16.95 15.23 M5.0 13 0
46 LOri-SOC 1 * 05 34 55.530 +09 56 10.09           ~ 2 0
47 2MASS J05345639+0955045 Y*O 05 34 56.4011569752 +09 55 04.516075056 20.453     15.90 14.54 M4.0 15 0
48 [BNM2013] 50.02 1755 LM* 05 34 56.5353884496 +09 42 32.927348844 21.940     19.44 17.63 M5.25 9 0
49 LOri-SOC 2 * 05 34 56.670 +09 54 54.12           ~ 2 0
50 ATO J083.7379+09.9101 LM* 05 34 57.1137685296 +09 54 36.607630968 18.847     14.43 13.45 M1.5 10 0
51 HD 245140 * 05 34 58.1788866096 +09 56 26.699247168   9.38 9.27     B9 9 0
52 [BNM2013] 53.02 234 LM* 05 34 58.3646862816 +09 53 47.160015180 21.576     16.43 14.87 M4.0 13 0
53 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2172 1
54 [BNM2013] 53.02 378 LM* 05 35 00.1021326840 +09 46 13.893762720 22.787     18.08 16.43 M5.5 10 0
55 2MASS J05350015+0952408 Y*? 05 35 00.1518411840 +09 52 40.960535232       20.88 18.60 ~ 10 0
56 LOri-SOC 3 * 05 35 00.900 +09 54 40.39           ~ 2 0
57 [BNM2013] 53.02 1587 LM* 05 35 00.9427596288 +09 58 20.266010508 23.125     20.32 18.30 M7.0 10 0
58 2MASS J05350274+0956475 Y*O 05 35 02.7409674744 +09 56 47.621519772 19.422     15.46 14.16 M4.0 17 0
59 LOri-SOC 5 * 05 35 03.030 +09 55 47.31           ~ 2 0
60 LOri-SOC 6 * 05 35 03.730 +09 54 13.93           ~ 2 0
61 [BNM2013] 54.04 319 LM* 05 35 04.0035095016 +10 07 26.883281388 22.684     17.79 16.15 M5.0 9 0
62 LOri-CFHT 162 * 05 35 04.44 +09 57 33.6       23.22 20.42 ~ 6 0
63 [BNM2013] 53.02 113 LM* 05 35 05.9661971088 +09 52 07.964497200 18.438 18.7 17.0 13.80 13.03 K8 10 0
64 NAME lam Ori Complex SFR 05 35 06 +09 56.0           ~ 73 0
65 [DM99] 24 Y*O 05 35 06.0624105619 +10 00 19.836115252 14.765   12.77 12.24 11.75 ~ 15 0
66 2MASS J05350625+0946538 Y*? 05 35 06.2886746760 +09 46 53.762537856       20.54 18.60 M5.5 7 0
67 [BNM2013] 54.04 1275 * 05 35 06.3092353704 +09 58 01.357915800 21.715     19.53 17.58 ~ 7 0
68 TYC 705-860-1 * 05 35 06.5594840880 +09 59 58.636404780   11.31 10.51     ~ 4 1
69 [BNM2013] 54.04 553 LM* 05 35 06.7749530904 +09 57 27.823371912       17.12 15.40 ~ 11 0
70 [DM99] 25 Y*O 05 35 06.9395279808 +09 48 57.440924676 18.677   15.40 14.43 13.48 ~ 16 0
71 2MASS J05350707+0954014 Y*? 05 35 07.0772449872 +09 54 01.458884592 19.825     18.48 16.71 ~ 11 0
72 [BNM2013] 54.04 72 LM* 05 35 07.4209442976 +09 58 22.433147076 19.899     15.56 14.23 M4.0 16 0
73 LOri-CFHT 150 LM* 05 35 07.4842668960 +09 49 33.298164660       21.29 19.00 M7.0 8 0
74 LOri-SOC 10 * 05 35 07.790 +09 55 21.84           ~ 2 0
75 [BNM2013] 54.04 774 LM* 05 35 07.9698061560 +10 00 05.374378836 21.654     19.24 17.21 M6.0 9 0
76 LOri-MAD 30 * 05 35 08.138 +09 55 34.27           ~ 2 0
77 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 286 0
78 [DM99] 26 Y*O 05 35 08.3333895240 +09 42 53.740734912 14.992   12.92 12.33 11.8 ~ 16 1
79 LOri-SOC 11 BD* 05 35 09.0908088528 +09 54 35.974658160           L0-2 3 0
80 V* V2190 Ori Or* 05 35 09.3304651656 +09 52 44.210815824 21.173     19.91 17.90 M6.5 11 0
81 GSC 00705-00822 * 05 35 09.4775575944 +10 00 38.097838044       11.77   ~ 5 1
82 HD 245185 Ae* 05 35 09.6034684104 +10 01 51.465413208 10.05 10.07 9.93     A0Vae 116 0
83 Cl Collinder 69 OpC 05 35 10 +09 48.8     2.8     ~ 277 0
84 LOri-SOC 12 * 05 35 10.650 +09 57 23.31           ~ 2 0
85 LOri-SOC 13 BD* 05 35 10.7584078728 +09 56 06.339314256           L0-2 3 0
86 [BNM2013] 53.02 279 LM* 05 35 10.9584309624 +09 57 43.879219740 19.481     17.39 15.81 ~ 13 0
87 LOri-CFHT 27 * 05 35 11.0254942300 +10 07 36.234316744 18.981 17.1 16.0 14.49 13.50 ~ 8 0
88 [BNM2013] 53.02 505 LM* 05 35 11.1298096200 +09 57 19.596222756 21.187     18.02 16.37 M5.0 12 0
89 [BNM2013] 54.04 61 LM* 05 35 11.3169416016 +10 00 50.341143024 22.870     16.63 15.04 M5.5 11 0
90 [BNM2013] 54.04 768 LM* 05 35 12.0365266272 +10 01 04.345695336 21.381     19.05 17.17 M5.5 9 0
91 [BNM2013] 52.03 456 LM* 05 35 12.5363097360 +09 55 19.554217212 18.814     14.95 13.74 ~ 14 0
92 [BNM2013] 52.03 290 LM* 05 35 12.5418386448 +09 53 11.167558332 20.382     15.78 14.41 M3.0 14 0
93 [BNM2013] 53.02 82 LM* 05 35 13.4646594120 +09 55 25.308277536 18.162     14.07 13.18 ~ 16 0
94 2MASS J05351365+0956273 Y*O 05 35 13.6499425752 +09 56 27.382026768       14.33 13.31 ~ 11 0
95 GSC 00705-00756 * 05 35 13.9564375344 +10 02 55.904421444       12.04   ~ 5 1
96 LOri-CFHT 167 * 05 35 14.149 +09 54 07.91 21.997     23.86 20.90 ~ 9 0
97 [DM99] 29 Y*O 05 35 15.1443038520 +10 01 06.810864744 19.773   16.76 15.25 13.97 ~ 17 0
98 [BNM2013] 53.02 199 LM* 05 35 15.3339402096 +09 48 36.934284780 21.429 19.4 18.4 16.62 15.16 M3.0 15 0
99 2MASS J05351622+0955185 Y*O 05 35 16.2216960600 +09 55 18.623119152 17.590     13.55 12.75 ~ 11 0
100 [DM99] 30 Y*O 05 35 17.1703798296 +09 51 11.426185656 19.764   16.46 15.59 14.13 ~ 15 0
101 2MASS J05351792+0956571 Y*? 05 35 17.9204401080 +09 56 57.236026488 21.466     16.89 15.37 ~ 12 0
102 [BNM2013] 54.01 47 LM* 05 35 18.1805622864 +09 52 24.195716364 21.442     16.58 15.15 M2.0 14 0
103 LOri-CFHT 163 * 05 35 18.36 +09 56 52.8       22.96 20.42 ~ 5 0
104 [DM99] 32 Y*O 05 35 18.3796940235 +10 02 38.447825686 19.840   16.73 16.25 14.69 ~ 10 0
105 V* V2345 Ori Or* 05 35 19.1391582432 +09 54 42.416659116 19.356     16.80 15.34 M4.0 16 0
106 GSC 00705-00766 * 05 35 19.5459706608 +10 01 57.909863100       12.01   ~ 5 1
107 2MASS J05351974+0947476 Y*O 05 35 19.7495844867 +09 47 47.624507636       11.68   ~ 10 0
108 [DM99] 33 Y*O 05 35 19.9214953199 +10 02 36.564512157 17.226   16.18 15.10 13.97 ~ 16 0
109 [BNM2013] 53.02 143 LM* 05 35 20.0061468912 +09 49 06.163283892 21.329 19.7 18.6 16.56 15.14 M4.0 13 0
110 [BNM2013] 54.01 34 LM* 05 35 21.4310355672 +09 49 56.550020520 20.895     16.12 14.76 M4.0 15 0
111 [DM99] 34 Y*O 05 35 21.4753552893 +09 44 10.215475018 19.029   16.80 15.68 14.38 ~ 16 0
112 2MASS J05352151+0953291 Y*? 05 35 21.5190190392 +09 53 29.206325796 21.679     17.65 16.04 ~ 13 0
113 [BNM2013] 54.01 474 LM* 05 35 22.0230333144 +09 52 52.242557808       18.24 16.50 ~ 11 0
114 [DM99] 35 Y*O 05 35 22.1940945312 +09 52 27.551382132 18.669   15.43 14.48 13.61 ~ 15 0
115 [BNM2013] 52.03 546 LM* 05 35 22.5612245184 +09 45 01.831863204       18.30 16.55 ~ 9 0
116 V* V2398 Ori Ir* 05 35 22.8532605432 +09 55 07.136660856       19.91 17.90 M5.0 10 0
117 TYC 705-937-1 * 05 35 23.6045836176 +09 57 57.102001884   11.90 10.54     ~ 4 1
118 [BNM2013] 54.01 470 LM* 05 35 24.1852496424 +09 55 15.429121896 21.474 16.6 17.8 17.96 16.35 M6.0 12 0
119 2MASS J05352440+0953519 Y*? 05 35 24.4008320424 +09 53 51.931420620 21.921     19.10 17.23 M5.5 10 0
120 Haro 6-72 Or* 05 35 25.3614391368 +10 08 38.303410776 17.975 16.1 16.21 15.04 13.71 ~ 17 0
121 2MASS J05352603+1008098 * 05 35 26.0353277040 +10 08 09.910946112       18.64 16.80 ~ 5 0
122 GSC 00705-00855 * 05 35 26.9005695936 +09 59 45.728874960       12.20   ~ 5 1
123 2MASS J05352828+1004267 TT* 05 35 28.2864578112 +10 04 26.681177496           ~ 5 0
124 [BNM2013] 54.01 372 LM* 05 35 28.7775536664 +09 54 10.123392384 21.646     18.48 16.76 M5.5 11 0
125 [BNM2013] 53.02 225 LM* 05 35 30.0485498040 +09 59 25.469342016 22.094     17.51 16.01 M5.5 11 0
126 [DM99] 38 Y*O 05 35 30.4546292472 +09 50 34.201223448 20.384   17.22 15.87 14.23 ~ 15 0
127 [DM99] 39 Y*O 05 35 34.835232 +10 00 35.12700 19.312   15.73 15.84 13.61 ~ 14 0
128 [DM99] 40 Y*O 05 35 35.7260650200 +09 44 35.388818376 20.398   17.23 16.01 14.66 ~ 12 0
129 [DM99] 41 Y*O 05 35 39.4837280928 +09 50 32.769606048 19.864   16.76 15.54 14.05 ~ 15 0
130 2MASS J05353984+0953240 Y*? 05 35 39.8485825224 +09 53 24.019150164   19.3 18.8 19.52 17.52 M6.5 10 0
131 [BNM2013] 50.03 2618 LM* 05 35 43.4166560616 +09 54 26.803726020 22.642     17.56 16.02 ~ 12 0
132 2MASS J05354433+1005543 Y*? 05 35 44.3497389912 +10 05 54.276393516       20.04 18.16 M5.75 8 0
133 HD 245275 * 05 35 44.8593610584 +09 55 24.328231908   10.66 10.46     A7 10 0
134 2MASS J05354757+0945499 Y*? 05 35 47.5787431440 +09 45 50.000411304 18.176 15.8 14.9 13.71 12.65 ~ 9 0
135 [BNM2013] 50.03 2593 LM* 05 35 50.9764378104 +09 51 03.455693172 22.743     17.84 16.19 M4.5 11 0
136 [DM99] 44 Y*O 05 35 51.3382727880 +09 55 11.205540084 19.028 17.50 15.69 14.64 13.45 ~ 19 0
137 LOri-CFHT 64 LM* 05 35 52.0093720632 +09 50 29.292019872 21.266 20.12 18.40 16.78 15.34 M5.5 14 0
138 [BNM2013] 51.03 282 LM* 05 35 52.5532195416 +09 48 31.083481908 20.876 19.35 17.71 16.19 14.73 M5.5 10 0
139 [DM99] 45 Y*O 05 35 54.3339128305 +10 04 23.275900468 15.275   12.89 12.28 11.69 ~ 16 0
140 [BNM2013] 50.03 3829 LM* 05 35 55.1913110568 +09 52 20.033134428       18.85 16.78 M6.0 9 0
141 [DM99] 46 Y*O 05 35 55.4313380105 +09 56 30.848128845 17.554 15.73 14.43 13.50 12.57 ~ 19 0
142 [DM99] 47 Y*O 05 35 55.66920 +09 50 53.2680 20.572 19.07 17.41 16.08 14.41 ~ 14 0
143 [DM99] 48 Y*O 05 35 55.8566851992 +09 56 21.711577812 19.970   16.85 15.69 14.39 M3.5 15 0
144 [DM99] 51 Y*O 05 35 57.9800394744 +09 54 32.795349372 17.848 16.14 14.85 13.91 12.94 ~ 18 0
145 [BNM2013] 53.01 385 LM* 05 36 00.8109060408 +09 52 57.053419932 22.448     17.57 16.02 M4.75 9 0
146 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 526 0
147 * 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) 775 0
148 Ton 72 WD* 11 58 51.5504170872 +28 53 31.198804476   15.5       DA5.4 16 0

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2022.09.25-04:13:38

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