2014A&A...568A...2S

Query : 2014A&A...568A...2S

2014A&A...568A...2S - Astronomy and Astrophysics, volume 568A, 2-2 (2014/8-1)

The Gaia-ESO Survey: Metallicity of the Chamaeleon I star-forming region.

SPINA L., RANDICH S., PALLA F., BIAZZO K., SACCO G.G., ALFARO E.J., FRANCIOSINI E., MAGRINI L., MORBIDELLI L., FRASCA A., ADIBEKYAN V., DELGADO-MENA E., SOUSA S.G., GONZALEZ HERNANDEZ J.I., MONTES D., TABERNERO H., TAUTVAISIENE G., BONITO R., LANZAFAME A.C., GILMORE G., JEFFRIES R.D., VALLENARI A., BENSBY T., BRAGAGLIA A., FLACCOMIO E., KORN A.J., PANCINO E., RECIO-BLANCO A., SMILJANIC R., BERGEMANN M., COSTADO M.T., DAMIANI F., HILL V., HOURIHANE A., JOFRE P., DE LAVERNY P., LARDO C., MASSERON T., PRISINZANO L. and WORLEY C.C.

Abstract (from CDS):

Recent metallicity determinations in young open clusters and star-forming regions suggest that the latter may be characterized by a slightly lower metallicity than the Sun and older clusters in the solar vicinity. However, these results are based on small statistics and inhomogeneous analyses. The Gaia-ESO Survey is observing and homogeneously analyzing large samples of stars in several young clusters and star-forming regions, hence allowing us to further investigate this issue. We present a new metallicity determination of the Chamaeleon I star-forming region, based on the products distributed in the first internal release of the Gaia-ESO Survey. The 48 candidate members of Chamaeleon I have been observed with the high-resolution, spectrograph UVES. We use the surface gravity, lithium line equivalent width, and position in the Hertzsprung-Russell diagram to confirm the cluster members, and we use the iron abundance to derive the mean metallicity of the region. Out of the 48 targets, we confirm 15 high probability members. Considering the metallicity measurements for nine of them, we find that the iron abundance of Chamaeleon I is slightly subsolar with a mean value [Fe/H]=-0.08±0.04dex. This result agrees with the metallicity determination of other nearby star-forming regions and suggests that the chemical pattern of the youngest stars in the solar neighborhood is indeed more metal-poor than the Sun. We argue that this evidence may be related to the chemical distribution of the Gould Belt that contains most of the nearby star-forming regions and young clusters.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual: Chamaeleon I - stars: pre-main sequence - stars: abundances - techniques: spectroscopic

Simbad objects: 96

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Number of rows : 96
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 Cl Blanco 1 OpC 00 03 24.7 -29 57 29           ~ 325 0
2 NGC 752 OpC 01 56 53.5 +37 47 38           ~ 642 0
3 NGC 1039 OpC 02 42 07.4 +42 43 19           ~ 430 0
4 Cl Melotte 20 OpC 03 26 28.1 +48 58 30           ~ 861 0
5 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3436 0
6 NAME Cas-Tau As* 04 16 +27.6           ~ 79 1
7 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1404 1
8 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3076 0
9 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
10 NGC 1901 OpC 05 17 58 -68 20.5           ~ 103 0
11 NAME 25 Ori Group OpC 05 24 47.5 +01 39 18           ~ 159 1
12 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 266 0
13 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2332 0
14 Cl Collinder 69 OpC 05 35 10.1 +09 48 47     2.8     ~ 313 0
15 NAME Ori Complex Cld 05 35.3 -05 23           ~ 441 0
16 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 567 0
17 NAME Taurus Cluster Cl* 06 10.1 +09 05           ~ 74 0
18 NGC 2451A OpC 07 42 56.6 -38 15 50           ~ 129 0
19 NGC 2516 OpC 07 58 06.5 -60 48 00           ~ 713 0
20 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 272 0
21 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1566 0
22 IC 2391 OpC 08 41 10.1 -52 59 28           ~ 822 0
23 NAME eta Cha Association OpC 08 42 32.9 -78 57 47           ~ 363 0
24 IC 2602 OpC 10 42 27.1 -64 25 34           ~ 675 0
25 TYC 9410-368-1 * 10 55 48.6112150560 -76 51 50.571981612   11.63 11.02     A2V 13 0
26 V* SX Cha Or* 10 55 59.802000 -77 24 40.12524   16.01 14.57 14.23 12.35 M1.5+M3 90 0
27 TYC 9414-421-1 * 10 56 41.0994633866 -77 44 29.349872308   13.411 11.565     ~ 9 0
28 CD-75 515 SB* 10 57 48.0132377976 -76 17 42.864583092   11.643 10.338     ~ 10 0
29 2MASS J10585418-7743115 * 10 58 54.1958594424 -77 43 11.873876988           ~ 5 0
30 V* TW Cha Or* 10 59 01.0607352312 -77 22 40.947126636     13.40   11.68 K8Ve 135 0
31 TYC 9414-167-1 * 10 59 38.2019125488 -78 22 42.134724480   12.781 11.065 10.68 9.205 ~ 13 0
32 Glass K * 11 01 00.0687422664 -77 38 51.715057740   15.87 13.77 13.43 11.25 K3III 11 0
33 HD 95883 * 11 01 28.8442128384 -75 39 51.980979528   7.46 7.33     A1Van 17 0
34 CD-74 588 * 11 02 05.2513228752 -75 25 09.468886764   11.41 10.05     ~ 6 0
35 V* CS Cha Or* 11 02 24.8763629208 -77 33 35.667131796   12.88 11.69   10.123 K2Ve 230 0
36 Glass U * 11 03 36.0056978064 -76 28 24.366179460   13.958 12.189 11.70 10.18 ~ 13 0
37 UCAC2 543380 * 11 03 49.3930155192 -77 00 09.966241836   15.200 13.080 12.67 10.38 ~ 6 0
38 2MASS J11044460-7706240 * 11 04 44.5791676008 -77 06 24.165254988           ~ 6 0
39 CHXR 14N Y*O 11 04 51.0231828624 -76 25 24.079917972   15.98 14.13   11.89 K4Ve 27 0
40 2MASS J11053303-7700120 PM* 11 05 33.0045566712 -77 00 12.009770028           ~ 4 0
41 NGC 3532 OpC 11 05 40.1 -58 42 25           ~ 350 0
42 HD 96675 Y*O 11 05 57.8105960448 -76 07 48.884316960   7.82 7.68   8.48 B5V 82 0
43 CD-74 595 * 11 06 05.0930204304 -75 11 45.520221408   10.79 9.73     Gwl 16 0
44 V* UX Cha Or* 11 06 45.0944158128 -77 27 02.383275420     14.78   12.07 K5Ve 63 0
45 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
46 Glass B * 11 06 58.5373011096 -77 13 32.422795068   15.336 12.921 12.52 9.85 G8III 17 0
47 NAME Cha I-S reg 11 07 44 -77 34.8           ~ 9 0
48 RX J1108.2-7728 Y*O 11 07 55.775088 -77 27 25.52724   15.26 13.40 13.07 11.04 K3Ve 57 0
49 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 187 0
50 2MASS J11080411-7513273 * 11 08 04.1113755072 -75 13 27.162784092           ~ 6 0
51 Glass A * 11 08 25.7675857440 -76 48 31.547398464   13.130 11.353     K3III 21 0
52 2MASS J11084041-7756310 * 11 08 40.4213914368 -77 56 31.037041608           ~ 4 0
53 2MASS J11085230-7743329 * 11 08 52.309 -77 43 32.99           ~ 3 0
54 2MASS J11085326-7519374 SB* 11 08 53.2624718232 -75 19 37.422907320     12.17     M2 18 1
55 Sz 30 TT* 11 09 11.72304 -77 29 12.4836   14.89 13.28 13.02 11.032 M2.5+M2 54 0
56 [CCE98] 1-74 TT* 11 09 17.6942588064 -76 27 57.926988648   15.48 13.92   11.72 K4Ve 44 0
57 V* VZ Cha Or* 11 09 23.7739008528 -76 23 20.857480836   13.82 12.94   12.14 K7e 140 0
58 NAME Cha in reg 11 09 29.4 -76 33 28           ~ 13 0
59 HJM C 4-2 PM* 11 09 51.1423970616 -76 58 56.991183672         10.63 G5 10 0
60 V* WY Cha Or* 11 10 07.0339153464 -76 29 37.674167388   15.29 13.87   11.62 K8Ve 88 1
61 Glass P * 11 11 13.3178632584 -77 31 17.928839820     13.76 13.49 10.69 K0III 17 0
62 2MASS J11112801-7749213 * 11 11 28.0637080320 -77 49 21.530132616           ~ 4 0
63 CHX 18N TT* 11 11 46.3370290776 -76 20 08.948823324   13.27 11.96   10.37 K5IVe 80 1
64 Ass Cha T 2-54 TT* 11 12 42.6709132056 -77 22 22.943489160     11.103   9.653 G8+K7 92 2
65 HJM E 1-8 TT* 11 12 42.9828272280 -76 37 04.868196276         10.95 K3Ve 34 0
66 2MASS J11135757-7818460 * 11 13 57.573 -78 18 46.07           ~ 3 0
67 2MASS J11140585-7729058 * 11 14 05.8427905272 -77 29 05.726447304           ~ 5 0
68 GSC 09414-00462 * 11 14 09.3702688944 -77 14 49.493064264   12.68 10.89 10.64   K3III 8 0
69 2MASS J11141568-7738326 * 11 14 15.6977363544 -77 38 32.853138324           ~ 4 0
70 TYC 9414-392-1 PM* 11 14 29.6229791016 -77 07 06.418474212   11.94 11.18     G2V 7 0
71 UCAC4 072-014360 * 11 14 35.1363553632 -75 39 28.924565184   13.227 11.830 11.470 10.38 ~ 10 0
72 CD-74 605 * 11 17 05.0830818648 -75 38 51.836950536   10.752 9.52     ~ 11 0
73 CHXR 68A * 11 18 20.2726799448 -76 21 57.719374992   14.22 12.75 12.51 10.96 K4Ve 22 0
74 2MASS J11213017-7616098 * 11 21 30.1500839184 -76 16 09.812396820           ~ 6 0
75 HD 99501 PM* 11 25 26.8065682608 -75 53 27.577022748   9.82 9.36     F2V 15 0
76 2MASS J11291261-7546263 TT* 11 29 12.6349452648 -75 46 26.416175772     12.91     K3Ve 24 0
77 RX J1140.3-8321 TT* 11 40 16.6137236784 -83 21 00.350133984   12.604 11.464 11.197 10.132 K4Ve 31 0
78 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
79 RX J1159.7-7601 TT* 11 59 42.2711847672 -76 01 26.178271284   12.46 11.11   9.858 K4Ve 63 0
80 NAME eps Cha Association OpC 11 59 51 -78 12.4           ~ 161 1
81 Cl Melotte 111 OpC 12 24 03.4 +25 39 07           ~ 480 0
82 HD 109138 TT* 12 33 29.7897267528 -75 23 11.250927348   10.24 9.47     K0V 47 0
83 NAME Cha III MoC 12 37.8 -80 15           ~ 140 2
84 NAME Cha II MoC 12 54 -77.2           ~ 337 0
85 Hn 23 Y*O 13 04 24.1091476992 -76 50 01.203848088           K7e 24 0
86 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 474 1
87 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
88 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
89 NAME rho Oph Cluster Cl* 16 26 22 -24 23.7           ~ 70 0
90 NGC 6281 OpC 17 04 43.0 -37 56 53           ~ 137 0
91 IC 4665 OpC 17 46 13.0 +05 36 54           ~ 372 0
92 NGC 6475 OpC 17 53 47.3 -34 50 28           ~ 384 0
93 NGC 6633 OpC 18 27 22.8 +06 36 54           ~ 385 0
94 IC 4756 OpC 18 38 35.8 +05 26 06           ~ 241 0
95 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 94 1
96 NAME Gould Belt PoG ~ ~           ~ 874 1

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