2015A&A...574L...7S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST04:43:21

2015A&A...574L...7S - Astronomy and Astrophysics, volume 574, L7-7 (2015/2-1)

The Gaia-ESO survey: Discovery of a spatially extended low-mass population in the Vela OB2 association.

SACCO G.G., JEFFRIES R.D., RANDICH S., FRANCIOSINI E., JACKSON R.J., COTTAAR M., SPINA L., PALLA F., MAPELLI M., ALFARO E.J., BONITO R., DAMIANI F., FRASCA A., KLUTSCH A., LANZAFAME A., BAYO A., BARRADO D., JIMENEZ-ESTEBAN F., GILMORE G., MICELA G., VALLENARI A., ALLENDE PRIETO C., FLACCOMIO E., CARRARO G., COSTADO M.T., JOFRE P., LARDO C., MAGRINI L., MORBIDELLI L., PRISINZANO L. and SBORDONE L.

Abstract (from CDS):

The nearby (distance∼350-400pc), rich Vela OB2 association, includes γ2 Velorum, one of the most massive binaries in the solar neighbourhood and an excellent laboratory for investigating the formation and early evolution of young clusters. Recent Gaia-ESO survey observations have led to the discovery of two kinematically distinct populations in the young (10-15Myr) cluster immediately surrounding γ2 Velorum. Here we analyse the results of Gaia-ESO survey observations of NGC 2547, a 35Myr cluster located two degrees south of γ2 Velorum. The radial velocity distribution of lithium-rich pre-main sequence stars shows a secondary population that is kinematically distinct from and younger than NGC 2547. The radial velocities, lithium absorption lines, and the positions in a colour-magnitude diagram of this secondary population are consistent with those of one of the components discovered around γ2 Velorum. This result shows that there is a young, low-mass stellar population spread over at least several square degrees in the Vela OB2 association. This population could have originally been part of a cluster around γ2 Velorum that expanded after gas expulsion or formed in a less dense environment that is spread over the whole Vela OB2 region.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - techniques: spectroscopic - stars: individual: gamma2 Velorum - open clusters and associations: individual: Vela OB2 - open clusters and associations: individual: NGC 2547

VizieR on-line data: <Available at CDS (J/A+A/574/L7): table1.dat>

Simbad objects: 79

goto Full paper

goto View the reference in ADS

Number of rows : 79

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 2MASS J08073463-4904107 pr* 08 07 34.6246613439 -49 04 10.778838444       14.46 13.59 ~ 4 0
2 2MASS J08073999-4903023 pr* 08 07 39.9938813763 -49 03 02.338367442       16.58 15.11 ~ 3 0
3 2MASS J08074194-4908306 pr* 08 07 41.9364987500 -49 08 30.730729135       17.40 16.02 ~ 2 0
4 2MASS J08074750-4911093 pr* 08 07 47.5072722124 -49 11 09.450196701       18.26 16.45 ~ 4 0
5 2MASS J08081196-4930268 pr* 08 08 11.9652946029 -49 30 26.871670913       17.75 16.05 ~ 3 0
6 2MASS J08081758-4914493 pr* 08 08 17.5844245071 -49 14 49.366052656       16.95 15.40 ~ 3 0
7 2MASS J08082095-4902029 pr* 08 08 20.9560762927 -49 02 03.047902860       15.95 14.68 ~ 3 0
8 2MASS J08082690-4859131 pr* 08 08 26.9024299706 -48 59 13.171568432       14.76 13.99 ~ 5 0
9 2MASS J08083389-4907176 pr* 08 08 33.8973140701 -49 07 17.708723107   16.063 14.93 14.20 13.76 ~ 5 0
10 2MASS J08083830-4932320 pr* 08 08 38.3035618329 -49 32 32.055785991       16.72 15.39 ~ 4 0
11 2MASS J08083910-4904025 pr* 08 08 39.1090989783 -49 04 02.548868385     17.73 16.63 15.09 ~ 3 0
12 2MASS J08083983-4855229 pr* 08 08 39.8297316492 -48 55 22.949662645       18.34 16.56 ~ 3 0
13 2MASS J08084459-4934202 pr* 08 08 44.5917161144 -49 34 20.291755881       13.46 12.82 ~ 3 0
14 GES J08090022-4920332 LM* 08 09 00.2278796523 -49 20 33.289743140   15.692 14.596 13.940 13.370 ~ 10 0
15 2MASS J08090250-4858172 pr* 08 09 02.5065580356 -48 58 17.287549268     13.13 12.73 12.32 G6-G7 24 0
16 2MASS J08090287-4906022 pr* 08 09 02.8787870039 -49 06 02.207103750   12.280 11.782 11.494 11.257 ~ 6 0
17 GES J08090471-4933274 LM* 08 09 04.7150358408 -49 33 27.481020232     17.39 16.51 14.86 ~ 4 0
18 UCAC2 10579403 LM* 08 09 07.2181844009 -49 19 14.483431742     14.884 14.11 13.61 K5 13 0
19 GES J08091025-4902250 LM* 08 09 10.2613593353 -49 02 25.030121248     16.06 15.25 14.11 ~ 6 0
20 2MASS J08091307-4925401 pr* 08 09 13.0791497518 -49 25 40.238110631   14.881 13.99 13.44 12.99 K3 8 0
21 2MASS J08091332-4857599 pr* 08 09 13.3234782882 -48 58 00.024540246     13.90 13.32 12.88 ~ 5 0
22 GES J08091385-4933181 LM* 08 09 13.8546395662 -49 33 18.187576575     18.34 17.28 15.60 ~ 4 0
23 2MASS J08091657-4909309 pr* 08 09 16.5799069050 -49 09 31.052767576   17.494 16.102 15.203 14.235 M0 11 0
24 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 199 0
25 2MASS J08092276-4916309 pr* 08 09 22.7642250778 -49 16 30.917455865   14.433 13.608 13.080 12.696 ~ 10 0
26 2MASS J08092293-4907575 pr* 08 09 22.9412613009 -49 07 57.520223651   12.717 12.189 11.870 11.564 ~ 11 0
27 GES J08092586-4932443 LM* 08 09 25.8690273270 -49 32 44.313477232     16.99 16.07 14.66 ~ 4 0
28 * gam01 Vel SB* 08 09 29.3182203760 -47 20 43.034677104   3.995 4.173     B2III 142 0
29 * 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 830 0
30 GES J08093443-4906027 LM* 08 09 34.4376897735 -49 06 02.723840024     19.526 18.183 16.353 ~ 8 0
31 2MASS J08094083-4923503 pr* 08 09 40.8280107361 -49 23 50.359288733   14.012 13.295 12.949 12.441 ~ 10 0
32 2MASS J08094507-4856307 pr* 08 09 45.0822460394 -48 56 30.796985491     12.41   11.77 ~ 7 0
33 GES J08094556-4917365 LM* 08 09 45.5573728394 -49 17 36.487752517   17.773 16.311 15.338 14.358 M0 12 0
34 2MASS J08094684-4907198 pr* 08 09 46.8439811223 -49 07 19.880686041   13.326 12.704 12.284 11.967 ~ 11 0
35 2MASS J08094807-4936236 pr* 08 09 48.0775028464 -49 36 23.672286949       13.89 13.41 ~ 2 0
36 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 302 0
37 GES J08095507-4858140 LM* 08 09 55.0753821556 -48 58 14.145112203     16.08 15.24 14.34 ~ 5 0
38 UCAC2 10579595 LM* 08 09 56.4411047054 -49 22 10.938814118   17.299 15.915 15.093 14.187 M0 13 0
39 2MASS J08095786-4849182 pr* 08 09 57.8595577816 -48 49 18.261896354       13.43 12.94 ~ 5 0
40 2MASS J08095939-4859111 pr* 08 09 59.4039927083 -48 59 11.233302792     13.94 13.45 12.98 ~ 4 0
41 GES J08100204-4939564 LM* 08 10 02.0431913474 -49 39 56.532467168     15.75 14.90 14.18 ~ 5 0
42 2MASS J08100380-4901071 pr* 08 10 03.7987960967 -49 01 07.121005467   13.124 12.543   11.803 ~ 8 0
43 GES J08100749-4910447 LM* 08 10 07.4819434649 -49 10 44.740064097   17.675 16.279 15.351 14.415 M0 13 0
44 2MASS J08100810-4912157 pr* 08 10 08.0798694326 -49 12 15.859256436   14.168 13.365 12.901 12.402 ~ 10 0
45 GES J08100893-4915413 LM* 08 10 08.9346099719 -49 15 41.411495519   16.767 15.479 14.776 13.981 K7 13 0
46 2MASS J08101223-4913056 pr* 08 10 12.2264795938 -49 13 05.655386834   13.116 12.542 12.176 11.866 ~ 13 0
47 2MASS J08101546-4905487 pr* 08 10 15.4540305763 -49 05 48.766478095   13.211 12.539   11.692 ~ 11 0
48 2MASS J08101697-4854194 pr* 08 10 16.9663668590 -48 54 19.440908132       12.91 12.51 ~ 4 0
49 2MASS J08101799-4923502 pr* 08 10 17.9926794143 -49 23 50.338114713   14.785 13.899 13.396 12.898 ~ 12 0
50 GES J08101811-4858252 LM* 08 10 18.1121801348 -48 58 25.276408024     17.88 16.80 15.30 ~ 4 0
51 2MASS J08101987-4856000 pr* 08 10 19.8695682809 -48 56 00.043306103     14.64 14.01 13.34 ~ 4 0
52 2MASS J08102172-4845417 pr* 08 10 21.7158966716 -48 45 41.723195043       13.57 12.92 ~ 3 0
53 2MASS J08102486-4901495 pr* 08 10 24.8682642102 -49 01 49.530372251   13.47 12.66 12.305 11.933 ~ 11 0
54 2MASS J08102704-4908487 pr* 08 10 27.0454526037 -49 08 48.806683403   14.09 13.24 12.73 12.373 ~ 13 0
55 2MASS J08102854-4856518 pr* 08 10 28.5390743304 -48 56 51.850609675   14.474 12.62   11.89 ~ 10 0
56 GES J08103186-4921296 LM* 08 10 31.8640168673 -49 21 29.723668654   16.481 15.230 14.408 13.655 K7 14 0
57 2MASS J08103470-4908399 pr* 08 10 34.7074123375 -49 08 40.032351837   12.931 12.390 12.092 11.703 ~ 13 0
58 GES J08103572-4909008 LM* 08 10 35.7209500353 -49 09 00.873249375   17.335 15.988 15.201 14.239 M0 12 0
59 2MASS J08103812-4912284 pr* 08 10 38.1307478304 -49 12 28.538509264   15.421 14.443 13.770 13.262 K5 11 0
60 2MASS J08103930-4929046 pr* 08 10 39.2965727641 -49 29 04.661385162     15.77 14.91 13.82 ~ 4 0
61 GES J08104335-4901152 LM* 08 10 43.3602173378 -49 01 15.275522934   16.687 15.464 14.752 13.951 ~ 8 0
62 2MASS J08104437-4939001 pr* 08 10 44.3772746141 -49 39 00.129530069       18.57 16.78 ~ 4 0
63 2MASS J08104546-4901068 pr* 08 10 45.4576889467 -49 01 06.819608705   12.85 12.11   11.506 ~ 11 0
64 2MASS J08104554-4905204 pr* 08 10 45.5377725445 -49 05 20.410156109   14.725 13.759 13.277 12.643 ~ 9 0
65 2MASS J08104984-4911258 pr* 08 10 49.8501401555 -49 11 25.863561171   12.238 11.769   11.165 ~ 11 0
66 2MASS J08110009-4906442 pr* 08 11 00.0969368373 -49 06 44.269064603   14.03 13.29 12.87 12.48 ~ 9 0
67 2MASS J08110139-4900088 pr* 08 11 01.4043539567 -49 00 08.888884782     13.47 13.06 12.57 ~ 6 0
68 2MASS J08110234-4916249 pr* 08 11 02.3437633033 -49 16 24.938270633   13.781 13.088 12.635 12.279 ~ 10 0
69 2MASS J08110403-4852137 pr* 08 11 04.0350950981 -48 52 13.807478265       14.19 13.51 ~ 4 0
70 2MASS J08110435-4853491 pr* 08 11 04.3613603873 -48 53 49.176868550       14.49 13.81 ~ 4 0
71 GES J08110759-4921423 LM* 08 11 07.5955092312 -49 21 42.244483715   18.733 17.279 16.244 14.783 ~ 8 0
72 2MASS J08112074-4913100 pr* 08 11 20.7375721297 -49 13 10.010543838   12.64 12.02 11.75 11.37 ~ 6 0
73 2MASS J08112121-4913280 pr* 08 11 21.2205040382 -49 13 28.039367101     13.07 12.77 12.32 ~ 2 0
74 GES J08112213-4921470 LM* 08 11 22.1397087689 -49 21 47.132336574   17.477 16.049 15.110 14.152 ~ 8 0
75 2MASS J08112560-4927206 pr* 08 11 25.6055057421 -49 27 20.567456776     18.50 17.23 15.63 ~ 3 0
76 2MASS J08112894-4921190 pr* 08 11 28.9380257391 -49 21 18.983002383     18.38 17.19 15.52 ~ 3 0
77 2MASS J08113190-4930135 pr* 08 11 31.904 -49 30 13.57     17.86   14.97 ~ 2 0
78 2MASS J08115134-4911410 pr* 08 11 51.3505507048 -49 11 41.034554262   13.849 13.14 12.65 12.27 ~ 9 0
79 2MASS J08115737-4911322 pr* 08 11 57.3849854835 -49 11 32.271500443     13.09   12.28 ~ 6 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...574L...7S and select 'bookmark this link' or equivalent in the popup menu


2019.10.18-04:43:21

© Université de Strasbourg/CNRS

    • Contact