2014A&A...567A..55S

Query : 2014A&A...567A..55S

2014A&A...567A..55S - Astronomy and Astrophysics, volume 567A, 55-55 (2014/7-1)

The Gaia-ESO Survey: the first abundance determination of the pre-main-sequence cluster gamma Velorum.

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

Abstract (from CDS):

Knowledge of the abundance distribution of star forming regions and young clusters is critical to investigate a variety of issues, from triggered star formation and chemical enrichment by nearby supernova explosions to the ability to form planetary systems. In spite of this, detailed abundance studies are currently available for relatively few regions. In this context, we present the analysis of the metallicity of the gamma Velorum cluster, based on the products distributed in the first internal release of the Gaia-ESO Survey. The gamma Velorum candidate members have been observed with FLAMES, using both UVES and Giraffe, depending on the target brightness and spectral type. In order to derive a solid metallicity determination for the cluster, membership of the observed stars must be first assessed. To this aim, we use several membership criteria including radial velocities, surface gravity estimates, and the detection of the photospheric lithium line. Out of the 80 targets observed with UVES, we identify 14 high-probability members. We find that the metallicity of the cluster is slightly subsolar, with a mean [Fe/H]=-0.057±0.018dex. Although J08095427-4721419 is one of the high-probability members, its metallicity is significantly larger than the cluster average. We speculate about its origin as the result of recent accretion episodes of rocky bodies of ∼60M⊕ hydrogen-depleted material from the circumstellar disk.

Abstract Copyright: ∼

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

VizieR on-line data: <Available at CDS (J/A+A/567/A55): table4.dat table5.dat table6.dat table7.dat>

Simbad objects: 90

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Number of rows : 90
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 Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3435 0
2 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17434 0
4 NAME GUM Nebula ISM 07 43 -42.1           ~ 421 1
5 HD 67610 * 08 06 36.1550354064 -47 48 20.622558240   9.98 9.84     A1/2V 10 0
6 GES J08064772-4659492 * 08 06 47.7153219744 -46 59 49.121849364           ~ 6 0
7 GES J08065592-4704528 * 08 06 55.9251462528 -47 04 52.807849572           ~ 7 0
8 HD 67658 * 08 06 56.8861620384 -47 17 24.592571736   9.84 9.76     A4IV 16 0
9 GES J08070521-4734401 * 08 07 05.2085349960 -47 34 40.236843864           ~ 6 0
10 2MASS J08070716-4721462 Y*? 08 07 07.1674960344 -47 21 46.388850732   12.99 11.90   10.74 ~ 7 0
11 2MASS J08071363-4725155 Y*? 08 07 13.6386164472 -47 25 15.655121580   13.39 12.73   11.94 ~ 8 0
12 UCAC2 11257492 * 08 07 13.8237155976 -47 36 15.645034188   14.131 12.593 12.23 11.00 ~ 12 0
13 TYC 8140-4071-1 * 08 07 15.0109140960 -46 58 15.361052124   11.66 11.26     ~ 5 0
14 GES J08071937-4710143 * 08 07 19.3684087248 -47 10 14.298900096           ~ 7 0
15 TYC 8140-3397-1 SB* 08 07 25.1589755112 -47 12 52.228969740   11.56 11.40     ~ 5 0
16 GES J08073209-4746433 * 08 07 32.0940525000 -47 46 43.338118512           ~ 5 0
17 TYC 8140-4964-1 * 08 07 32.3774761464 -47 22 12.090499536   11.04 10.72   10.46 ~ 6 0
18 TYC 8140-3205-1 * 08 07 33.1507755552 -47 44 51.376301088   12.13 11.24     ~ 7 0
19 GES J08073447-4716569 * 08 07 34.4707704504 -47 16 56.906925708           ~ 5 0
20 GES J08073722-4705053 SB* 08 07 37.22 -47 05 05.3     11.83     ~ 4 0
21 CD-46 3812 Y*O 08 07 40.175304 -47 21 02.22228   10.861 10.479 10.511   ~ 7 0
22 2MASS J08074018-4730402 Y*? 08 07 40.1889034704 -47 30 40.364917920   13.20 12.28   11.33 ~ 8 0
23 GES J08074278-4659566 * 08 07 42.7819141560 -46 59 56.611404924           ~ 4 0
24 UCAC4 216-019680 * 08 07 46.7110439976 -46 58 17.261910732   12.663 11.489 11.211   ~ 8 0
25 2MASS J08075166-4706085 Y*? 08 07 51.6724111968 -47 06 08.542843956   14.22 12.97   11.68 ~ 8 0
26 2MASS J08080053-4702145 Y*? 08 08 00.5328715776 -47 02 14.490632904   13.53 12.81   12.01 ~ 8 0
27 2MASS J08080431-4716271 Y*? 08 08 04.3152901392 -47 16 27.159031380   13.47 12.65   11.76 ~ 8 0
28 CD-47 3618 * 08 08 05.2545290544 -47 22 06.062535624   10.59 10.55     A5 8 0
29 HD 67927 Y*O 08 08 06.9028608984 -47 15 07.480951236   9.30 9.25     A1V 15 0
30 2MASS J08080882-4736515 Y*? 08 08 08.8236956376 -47 36 51.545399220   14.02 12.69   11.36 ~ 8 0
31 TYC 8140-5365-1 * 08 08 12.4495701552 -47 05 59.232571944   10.43 10.40     ~ 4 0
32 2MASS J08081445-4701499 Y*? 08 08 14.4520908408 -47 01 49.898715816   13.29 12.66   11.91 ~ 8 0
33 2MASS J08082630-4721082 Y*? 08 08 26.3027446176 -47 21 08.272885500   11.22 10.97   10.69 ~ 5 0
34 UCAC4 214-019721 * 08 08 32.3230702536 -47 22 55.286611716   13.541 12.224 11.916 11.23 ~ 10 0
35 TYC 8140-5640-1 * 08 08 37.0685275008 -47 27 37.034644356   11.08 10.81   10.57 ~ 7 0
36 2MASS J08083759-4736060 Y*? 08 08 37.5857179872 -47 36 06.047248464   12.79 12.21   11.51 ~ 8 0
37 2MASS J08083990-4741513 Y*? 08 08 39.9003395832 -47 41 51.340855560   12.99 12.34   11.62 ~ 8 0
38 2MASS J08085306-4704068 Y*? 08 08 53.0726973960 -47 04 06.837407220   12.74 12.12   11.40 ~ 8 0
39 TYC 8140-5301-1 * 08 08 54.5551092312 -47 00 05.371702956   12.494 11.481     ~ 11 0
40 TYC 8140-5801-1 Y*? 08 08 55.9893414264 -46 59 33.309422412   12.345 11.356 11.118 10.33 ~ 12 0
41 HD 68159 Y*O 08 09 04.3041762984 -47 41 02.540726664   10.22 10.00     A0/1V 22 0
42 2MASS J08090541-4740260 Y*? 08 09 05.4106662888 -47 40 26.062145940   12.99 12.13   11.13 ~ 8 0
43 HD 68158 Y*O 08 09 07.3837018608 -47 38 13.599534300   9.24 9.18     A0V 18 0
44 TYC 8140-5565-1 Y*? 08 09 08.4976297272 -47 01 40.720867176   11.26 10.73     F1V 16 0
45 GES J08091397-4722030 * 08 09 13.9765485936 -47 22 03.031665384           ~ 7 0
46 HD 68186 Y*O 08 09 16.3772371392 -47 13 37.426142496   9.46 9.38     A1/2V 20 0
47 2MASS J08091875-4708533 Y*? 08 09 18.7490601312 -47 08 53.374948944     12.496   11.841 F9IV-Ve 9 0
48 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 272 0
49 2MASS J08092627-4731001 Y*O 08 09 26.2667978328 -47 31 00.107337540   13.45 12.55   11.53 K1Ve 21 0
50 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 906 0
51 TYC 8140-5320-1 Y*? 08 09 33.0397427736 -47 37 06.581597736   12.803 11.964 11.841 10.97 G2Ve 12 0
52 2MASS J08093589-4718524 Y*O 08 09 35.8913139888 -47 18 52.486397388   13.82 12.79   11.59 ~ 12 0
53 2MASS J08094219-4719526 Y*O 08 09 42.2003451888 -47 19 52.692978144   13.31 12.39   11.24 K1Ve 14 0
54 CD-46 3850 * 08 09 43.0038039912 -47 18 35.258685660   9.86 9.74     ~ 9 0
55 GES J08094390-4703094 * 08 09 43.9016620992 -47 03 09.402431256           ~ 4 0
56 2MASS J08094711-4740038 Y*? 08 09 47.1086620752 -47 40 03.807648588   12.94 11.89   10.77 ~ 8 0
57 TYC 8140-2255-1 * 08 09 50.4187820064 -46 57 07.983684216   10.97 10.61     ~ 4 0
58 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 400 0
59 2MASS J08095426-4721418 Y*O 08 09 54.2654314008 -47 21 41.868272592   12.53 11.84   11.07 G1.5V 15 0
60 2MASS J08095428-4710344 Y*? 08 09 54.2851204752 -47 10 34.398838272   13.62 12.44   11.13 ~ 9 0
61 GES J08095783-4701385 * 08 09 57.8387227512 -47 01 38.342745156     12.63   11.45 ~ 12 0
62 2MASS J08095966-4726048 Y*O 08 09 59.6681832192 -47 26 04.792181856   12.79 12.00   11.10 K0IV 13 0
63 UCAC2 11258366 * 08 10 11.6023792608 -47 37 55.612207776   14.09 12.61 12.29 11.11 ~ 11 0
64 UCAC4 214-020212 * 08 10 12.0094313544 -47 20 46.405344120     12.475 12.454   ~ 7 0
65 2MASS J08101213-4718392 Y*? 08 10 12.1234322616 -47 18 39.243789468   13.04 11.89   10.69 ~ 8 0
66 TYC 8140-6494-1 * 08 10 13.0731522288 -47 22 22.153260540   12.39 11.38     ~ 10 0
67 2MASS J08103648-4659501 Y*? 08 10 36.4769486592 -46 59 50.225736192   13.40 12.29   11.11 ~ 9 0
68 UCAC4 215-020430 Y*? 08 10 37.8160064424 -47 02 58.444386540     12.024 11.759 10.84 ~ 13 0
69 TYC 8140-6048-1 * 08 10 37.9958791944 -47 23 31.777548036   12.32 12.47     ~ 5 0
70 2MASS J08103996-4714427 Y*O 08 10 39.9578651784 -47 14 42.759576960   12.66 12.06   11.34 ~ 10 0
71 2MASS J08104494-4723015 Y*? 08 10 44.9485186224 -47 23 01.484750184   13.43 12.24   11.02 ~ 8 0
72 GES J08105180-4746394 * 08 10 51.8009200272 -47 46 39.465178104           ~ 7 0
73 TYC 8140-6307-1 * 08 10 53.8238237952 -47 19 57.934613856   11.05 10.69   10.23 ~ 6 0
74 HD 68577 Y*O 08 10 58.1322976248 -47 29 13.655254056   10.09 9.91   9.80 A2V 17 0
75 TYC 8140-1113-1 * 08 10 58.8762428784 -47 00 14.062371660   11.14 11.20     ~ 5 0
76 2MASS J08110285-4724405 Y*O 08 11 02.8460758848 -47 24 40.496201784   13.93 12.99   11.91 K1Ve 18 0
77 TYC 8140-5363-1 * 08 11 12.2837848632 -47 04 49.096420716   12.31 11.51     ~ 9 0
78 HD 68656 * 08 11 16.1861083536 -47 13 18.811864956   9.22 9.17     A0V 15 0
79 2MASS J08111853-4704187 Y*? 08 11 18.5295406512 -47 04 18.713210556   13.41 12.44   11.41 ~ 9 0
80 GES J08112119-4654274 * 08 11 21.1908413088 -46 54 27.396597924           ~ 6 0
81 CD-46 3889 * 08 11 21.8812268808 -47 11 28.166924508   10.62 10.34     A5 9 0
82 GES J08112306-4733019 * 08 11 23.0613765936 -47 33 01.925383644           ~ 7 0
83 GES J08112313-4737105 * 08 11 23.1345257448 -47 37 10.486297092           ~ 6 0
84 TYC 8140-4604-1 * 08 11 41.1613192032 -47 20 34.441615320   11.96 11.20     ~ 7 0
85 GES J08114979-4700130 * 08 11 49.7948690592 -47 00 12.977487288           ~ 7 0
86 GES J08115305-4654115 SB* 08 11 53.0472401040 -46 54 11.526898320     12.93     ~ 5 0
87 TYC 8140-5062-1 * 08 11 54.5036134464 -46 55 42.932628624   10.87 10.35     ~ 6 0
88 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1230 2
89 Cl Trumpler 10 OpC 08 47 46.3 -42 33 58           ~ 175 0
90 NAME Vela Field reg ~ ~           ~ 182 0

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