2001A&A...372..862R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET05:33:53

2001A&A...372..862R - Astronomy and Astrophysics, volume 372, 862-878 (2001/6-4)

Membership, lithium, and metallicity in the young open clusters IC 2602 and IC 2391: Enlarging the sample.

RANDICH S., PALLAVICINI R., MEOLA G., STAUFFER J.R. and BALACHANDRAN S.C.

Abstract (from CDS):

We present lithium abundances for ∼50 X-ray selected candidate members of the 30-50 Myr old open clusters IC 2602 and IC 2391. These data enlarge and extend to cooler temperatures previous Li surveys of these clusters by Stauffer et al. (1989ApJ...342..285S) and Randich et al. (1997A&A...323...86R). We also give for the first time an estimate of the metallicity of the two clusters which turns out to be close to solar. Radial velocity measurements together with Hα chromospheric emission and the presence/absence of other spectroscopic features are used to ascertain the membership status for the sample stars not yet confirmed as cluster members; rotational velocities have also been determined for all sample stars. Stars more massive than ∼1M in both clusters show no sign of significant Li depletion, while lower mass stars are all lithium depleted, with the amount of Li depletion increasing to cooler temperatures. We confirm that the late-G and early-K stars in IC 2602 present a star-to-star scatter in Li abundances similar to, but not as large as the one in the Pleiades. A scatter is also seen among late-K and M dwarfs. Unlike in the Pleiades and Alpha Per clusters, the scatter among early-K stars in IC 2602 shows only marginal correlation with rotation. Our data suggest that the drop-off of lithium towards lower masses may start at an earlier color in IC 2391 than in IC 2602, but larger cluster samples are needed to confirm this result. In addition, whereas G and early K stars in the two clusters are, on average, more Li rich than their counterparts in the Pleiades, a fraction of the coolest stars, in particular in IC 2391, are as depleted as the lowest-Li Pleiades stars of the same mass. If they continue depleting Li on their way to the main sequence, they are expected to be more Li depleted than the Pleiades at the age of the latter cluster.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: IC 2602 - open clusters and associations: individual: IC 2391 - stars: abundances - stars: interiors

VizieR on-line data: <Available at CDS (J/A+A/372/862): stars.dat table2.dat table3.dat table4.dat tables.tex>

Simbad objects: 75

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Number of rows : 75

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl Blanco 1 OpC 00 04 07 -29 50.0           ~ 241 0
2 NGC 1039 OpC 02 42 05 +42 45.7           ~ 373 0
3 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 804 1
4 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 3024 0
5 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2695 0
6 CD-52 2467 * 08 38 22.9094400997 -52 56 48.038542116   11.61 10.93 10.81   ~ 19 0
7 CD-52 2472 SB* 08 38 55.6627793898 -52 57 51.676186371 11.19 11.01 10.33 10.19   G2 31 0
8 Cl* IC 2391 SMY 5 * 08 38 58.7468190439 -53 19 12.646867068     13.77     M3 7 0
9 CD-52 2473 SB* 08 38 59.8052838278 -53 01 26.187449385 10.00 10.08 9.62     F5V 25 0
10 V* V364 Vel BY* 08 39 53.0495740630 -52 57 56.846374033   12.75 11.89 11.69   K0 29 0
11 V* V365 Vel BY* 08 40 06.2326031581 -53 38 06.873693649   11.07 10.47 10.44   G0 31 0
12 VXR PSPC 16a * 08 40 16.2481447154 -52 56 29.173842577   12.48 11.76 11.60   G9 19 0
13 Cl* IC 2391 SMY 21 V* 08 40 18.2862227241 -53 30 28.803890200   14.73 13.51 13.07   K3e 13 0
14 IC 2391 OpC 08 40 32 -53 02.0           ~ 723 0
15 HD 74340 SB* 08 41 09.9774431876 -52 54 10.542229701   10.33 9.87     F5V 36 0
16 Cl* IC 2391 PMM 6478 * 08 41 10.9813387802 -52 31 46.693418225   11.74 11.50     ~ 15 0
17 V* V366 Vel BY* 08 41 25.8877080443 -53 22 41.466903428   13.63 12.519   11.277 K3e 27 0
18 V* V367 Vel BY* 08 41 39.6674296696 -52 59 34.029546036   14.63 12.613     K7.5e 20 0
19 2MASS J08415216-5306465 SB* 08 41 52.1617385939 -53 06 46.713772958   13.62 12.52     G7 12 1
20 V* V368 Vel BY* 08 41 57.8483931741 -52 52 13.940974469   14.59 13.76 12.74 12.03 K7e 26 0
21 CD-52 2501 * 08 42 12.2936199096 -53 06 03.788091714           F5V 29 0
22 V* V371 Vel BY* 08 42 18.5565275193 -53 01 56.872918365   15.44       M2e 25 0
23 Cl* IC 2391 PMM 4695 * 08 42 30.6877161444 -52 57 34.480949225   14.95 14.63 13.49 12.45 M1e 10 1
24 CPD-52 1614 SB* 08 42 46.6081760006 -53 01 01.345805604   10.7 10.3     ~ 27 0
25 V* V373 Vel BY* 08 43 27.7497668528 -52 57 39.103970087       14.12   ~ 17 0
26 V* V372 Vel BY* 08 43 27.8599683939 -52 57 35.899821256       13.51   ~ 16 0
27 V* V374 Vel BY* 08 43 29.2912717798 -52 41 28.326566376   12.59       K0 13 0
28 Cl* IC 2391 PMM 4778 * 08 43 46.0 -52 51 17     14.13     M0e 4 0
29 TYC 8569-552-1 SB* 08 43 56.8075049807 -52 41 05.614522273   12.61 11.77     K0 11 0
30 Cl* IC 2391 PMM 2012 * 08 43 59.0160021924 -53 33 43.651366416   12.57 11.67 11.52   K0 11 0
31 V* V376 Vel BY* 08 44 05.2223844826 -52 53 17.191727447   11.37 10.75 10.74   G3e: 32 0
32 2MASS J08441907-5308289 * 08 44 19.0897497762 -53 08 28.720507523     15.32     M3e 5 0
33 V* V377 Vel BY* 08 44 26.1594105936 -52 42 32.327540858   12.27 11.51 11.23   G9 31 0
34 V* V379 Vel BY* 08 45 26.9315535133 -52 52 02.103937104   13.79 12.76 12.54   K3e 27 0
35 V* V380 Vel Ro* 08 45 39.1345972494 -52 25 59.545499157   10.35 9.88 9.98   F8 22 0
36 CPD-53 1875 Ro* 08 45 52.7024139449 -53 27 28.292655882   10.95 10.423 10.16 9.707 G2V 16 1
37 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2055 0
38 TYC 8960-1957-1 * 10 28 31.2267482110 -63 44 15.599858443   12.06 11.31     ~ 19 0
39 V* V542 Car BY* 10 33 41.8060342146 -64 13 45.699501964   12.30 11.75     K2.5IV(e) 22 0
40 V* V544 Car BY* 10 36 18.2440221228 -64 14 56.482138683   16.68       ~ 14 0
41 V* V545 Car BY* 10 36 26.4266168100 -65 00 16.449073520   15.85       ~ 13 0
42 RX J1037.0-6458 X 10 37 01.6 -64 58 32     15.68     ~ 3 0
43 V* V547 Car BY* 10 37 22.2702464798 -64 43 19.977027037   16.67       ~ 12 0
44 V* V548 Car BY* 10 37 49.4170800550 -64 00 50.489347121   16.69       ~ 15 0
45 RX J1039.2-6440 * 10 39 14.3244388427 -64 40 49.017719502   17.25 15.72 15.82   ~ 6 0
46 RX J1039.3-6438 * 10 39 20.0100732188 -64 38 58.836468321     15.93 15.75   ~ 5 0
47 HD 310112 * 10 39 48.4495869659 -65 20 28.805689920   12.08 11.34     A3 7 0
48 V* V549 Car BY* 10 39 54.9423188633 -63 36 24.388928977   16.43       ~ 11 0
49 TYC 8961-1131-1 * 10 40 01.0170051461 -63 18 41.849891543   11.40 10.65     ~ 6 0
50 V* V551 Car BY* 10 40 30.1809936996 -64 42 16.708970919   16.31       ~ 14 0
51 V* V552 Car BY* 10 40 51.3525815891 -64 42 47.875858869   13.26       ~ 14 0
52 V* V553 Car BY* 10 41 00.0598461487 -64 20 00.689021749       15.09   ~ 10 0
53 V* V555 Car BY* 10 42 07.0838573415 -64 46 07.836732097   12.40       G 23 0
54 V* V556 Car BY* 10 42 28.1546208781 -64 36 12.763583343   17.19       ~ 14 0
55 IC 2602 OpC 10 42 58 -64 24.0           ~ 557 0
56 V* V558 Car BY* 10 44 06.8105449584 -63 59 35.056780744   11.75       G4 27 0
57 RX J1044.1-6414 * 10 44 09.9769179576 -64 14 50.736678003   16.97 15.02 14.50   ~ 6 0
58 V* V559 Car BY* 10 44 22.5514609452 -64 15 30.116315015   11.61       G0 30 0
59 V* V562 Car BY* 10 45 18.5498037589 -63 32 26.429422198   15.59       ~ 15 0
60 GES J10453719-6416088 * 10 45 37.1357740582 -64 16 08.704206612   16.60 14.98     ~ 4 0
61 V* V568 Car BY* 10 48 25.3946143710 -64 22 43.951339372   15.16       ~ 14 0
62 V* V571 Car BY* 10 49 56.8362121363 -63 48 19.075055245   14.19       ~ 16 0
63 * bet Vir PM* 11 50 41.7182390 +01 45 52.991019 4.26 4.15 3.60 3.13 2.85 F9V 859 0
64 HD 126053 PM* 14 23 15.2847534665 +01 14 29.641784590 6.98 6.90 6.27 5.71 5.39 G1.5V 362 0
65 V* V2213 Oph BY* 17 05 16.8186294192 +00 42 09.217571716   6.59   5.6   F8.5IV-V 318 0
66 * bet Oph PM* 17 43 28.3526482 +04 34 02.295484 5.150 3.930 2.750 1.96 1.38 K2IIICN0.5 455 0
67 IC 4665 OpC 17 46 18 +05 43.0           ~ 317 0
68 [RSP95] 28A X ~ ~     15.69     ~ 3 0
69 [RSP95] 24A * ~ ~   16.04 14.61     ~ 10 0
70 VXR PSPC 80a * ~ ~     11.98     K2 6 0
71 Cl* IC 2391 PMM 6576 * ~ ~     12.54     G6 6 0
72 [RSP95] 54A X ~ ~   13.28 12.13     ~ 3 0
73 [RSP95] 37A X ~ ~   16.55 14.69     ~ 2 0
74 [RSP95] 8A X ~ ~   11.06 10.41     ~ 3 0
75 [RSP95] 73A X ~ ~     16.02     ~ 2 0

    Equat.    Gal    SGal    Ecl

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2020.10.26-05:33:53

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