2007A&A...461..509P


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST23:03:57

2007A&A...461..509P - Astronomy and Astrophysics, volume 461, 509-522 (2007/1-2)

WIYN open cluster study. XXVI. Improved kinematic membership and spectroscopy of IC 2391.

PLATAIS I., MELO C., MERMILLIOD J.-C., KOZHURINA-PLATAIS V., FULBRIGHT J.P., MENDEZ R.A., ALTMANN M. and SPERAUSKAS J.

Abstract (from CDS):

Young open clusters provide important clues to the interface between the main sequence and pre-main-sequence phases of stellar evolution. The young and nearby open cluster IC 2391 is well-suited to studies of these two evolutionary phases. We establish a bona fide set of cluster members and then analyze this set in terms of binary frequency, projected rotational velocities, [Fe/H], and lithium abundance. In the wake of the Hipparcos distance controversy for the Pleiades, we compare the main-sequence fitting distance modulus to the Hipparcos mean parallax for IC 2391. We have obtained new proper motions for 6991 stars down to V ∼13-16 over a ∼9-deg2 area of the sky comprising IC 2391. The precision of proper motions, σµ=1.7 mas/yr, allowed us to calculate reliable membership probabilities. We also obtained precise radial velocity and v sin i measurements with Coravel and FEROS for 76 probable cluster members. The cluster's mean radial velocity is +14.8±0.7 km/s. The FEROS high-resolution spectra were used to determine both the [Fe/H] abundance in the four main sequence dwarfs of IC 2391 and the Li abundance in 47 stars. In addition, new BV CCD photometry was obtained for the majority of probable cluster members. The proper-motion survey covers a 6 times larger sky area than the prior targeted searches for cluster members in IC 2391. A total of 66 stars are considered bona fide cluster members down to a mass equivalent to 0.5M. A quarter of them have been newly identified with many in the F2-K5 spectral range, which is crucial for a main-sequence fit. We find a mean [Fe/H] value of +0.06±0.06, when a solar abundance of logε(Fe)=7.45 is adopted. The main sequence fitting yields a distance modulus that is 0.19 mag larger than that derived from Hipparcos parallaxes; thus this offset nearly has the size of a similar offset found for the Pleiades. The Li abundance pattern is similar to the earlier findings and is typical for a 40Myr old open cluster. A variety of new data on the probable members of IC 2391 improve essentially all observational parameters of this young open cluster.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/461/509): ic2391.dat table1.dat table3.dat table5.dat table6.dat>

Nomenclature: Table ic2391.dat: Cl* IC 2391 PMM NNNN N=6991 among (Nos 4-8431).

Status in Simbad:  could be processed

Simbad objects: 71

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Number of rows : 71

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 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1062 1
2 Cl Melotte 20 OpC 03 26 42 +48 48.0           ~ 741 0
3 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2907 0
4 V* V1229 Tau Al* 03 47 29.4535999265 +24 17 18.016988974   6.87 6.81   6.74 A0VpSi+Am 168 0
5 * 27 Tau SB* 03 49 09.7425852 +24 03 12.300277 3.18 3.54 3.63 3.62 3.68 B8III 359 0
6 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2581 0
7 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1906 1
8 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1544 1
9 NGC 2451A OpC 07 43 12 -38 24.0           ~ 80 0
10 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1089 2
11 VXR PSPC 2b * 08 37 56.2349763182 -52 57 05.504210044       12.49   ~ 7 0
12 CD-52 2467 * 08 38 22.9094400997 -52 56 48.038542116   11.61 10.93 10.81   ~ 18 0
13 HD 73952 * 08 38 44.8069776775 -53 05 25.370461345   6.348 6.431     B8V 65 0
14 CD-52 2472 SB* 08 38 55.6627793898 -52 57 51.676186371 11.19 11.01 10.33 10.19   G2 29 0
15 Cl* IC 2391 SMY 5 * 08 38 58.7468190439 -53 19 12.646867068     13.77     M3 6 0
16 CD-52 2473 SB* 08 38 59.8052838278 -53 01 26.187449385 10.00 10.08 9.62     F5V 25 0
17 HD 74009 * 08 39 03.3919256899 -52 42 39.726446238   9.51 9.37 9.48   F3V 28 0
18 HD 74044 * 08 39 16.5287774028 -52 18 49.798370558   8.69 8.48     A3mA7-A7 42 0
19 CD-52 2482 * 08 39 38.8133226409 -53 10 07.116581119   10.59 9.95     G: 13 0
20 V* V364 Vel BY* 08 39 53.0495740630 -52 57 56.846374033   12.75 11.89 11.69   K0 28 0
21 HD 74146 SB* 08 39 57.5996312070 -53 03 16.999913803 4.48 5.05 5.19     B5IV 98 0
22 V* KR Vel a2* 08 39 59.3712100344 -53 15 39.446220863   7.183 7.200     ApEuCr(Sr) 71 0
23 V* V365 Vel BY* 08 40 06.2326031581 -53 38 06.873693649   11.07 10.47 10.44   G0 27 0
24 VXR PSPC 16a * 08 40 16.2481447154 -52 56 29.173842577   12.48 11.76 11.60   G9 18 0
25 HD 74212 * 08 40 17.4043863470 -53 26 31.755253831   9.75 8.69     K0III 15 0
26 * omi Vel Pu* 08 40 17.5855320 -52 55 18.800233 2.8 3.44 3.63     B3/5(V) 160 1
27 UCAC4 183-021464 V* 08 40 18.2862227241 -53 30 28.803890200   14.73 13.51 13.07   K3e 11 0
28 IC 2391 OpC 08 40 32 -53 02.0           ~ 703 0
29 HD 74275 * 08 40 48.5254743229 -52 48 06.971088042   7.27 7.27     A0V 56 0
30 Cl* IC 2391 SMY 23 * 08 40 49.1006933615 -53 37 45.362061017   11.91 11.15 10.84   G6 18 0
31 Cl* IC 2391 PMM 2672 * 08 41 06.9 -53 14 17     13.97     M3 6 0
32 HD 74340 SB* 08 41 09.9774431876 -52 54 10.542229701   10.33 9.87     F5V 35 0
33 Cl* IC 2391 PMM 6478 * 08 41 10.9813387802 -52 31 46.693418225   11.74 11.50     ~ 14 0
34 V* V366 Vel BY* 08 41 25.8877080443 -53 22 41.466903428   13.63 12.519   11.277 K3e 25 0
35 V* V367 Vel BY* 08 41 39.6674296696 -52 59 34.029546036   14.63 12.613     K7.5e 19 0
36 HD 74438 * 08 41 46.5773782488 -53 03 44.998857473   7.81 7.58     A2mA5-A8 41 0
37 2MASS J08415216-5306465 SB* 08 41 52.1617385939 -53 06 46.713772958   13.62 12.52     G7 12 1
38 V* V368 Vel BY* 08 41 57.8483931741 -52 52 13.940974469   14.59 13.76 12.74 12.03 K7e 25 0
39 HD 74497 ** 08 42 06.5994005 -52 45 23.015973   8.52 7.86     G3V 57 1
40 CD-52 2501 * 08 42 12.2936199096 -53 06 03.788091714           F5V 28 0
41 V* V370 Vel BY* 08 42 14.7557674323 -52 56 02.331406760   11.51 10.462   9.620 G9V 19 0
42 V* V371 Vel BY* 08 42 18.5565275193 -53 01 56.872918365   15.44       M2e 24 0
43 V* KT Vel a2* 08 42 18.9920732 -53 06 00.201557 4.79 5.340 5.474     B9III(pSi) 93 0
44 V* HY Vel SB* 08 42 25.3862731 -53 06 50.343091 3.97 4.655 4.815     B3IV 154 0
45 UCAC2 8960813 * 08 42 30.6877161444 -52 57 34.480949225   14.95 14.63 13.49 12.45 M1e 8 1
46 CPD-52 1614 SB* 08 42 46.6081760006 -53 01 01.345805604   10.7 10.3     ~ 26 0
47 VXR HRI 30 SB* 08 42 49.62 -52 46 14.0     11.32     F9 4 0
48 HD 74678 * 08 43 03.4715158023 -53 04 40.676023475   7.73 7.65     A1V 39 0
49 V* V373 Vel BY* 08 43 27.7497668528 -52 57 39.103970087       14.12   ~ 16 0
50 V* V372 Vel BY* 08 43 27.8599683939 -52 57 35.899821256       13.51   ~ 15 0
51 V* V374 Vel BY* 08 43 29.2912717798 -52 41 28.326566376   12.59       K0 12 0
52 HD 74734 * 08 43 32.8216573050 -52 00 13.634616105   7.97 7.87     A1IV/V 13 0
53 Cl* IC 2391 PMM 4778 * 08 43 46.0 -52 51 17     14.13     M0e 4 0
54 CD-52 2523 * 08 43 52.3043277609 -53 13 59.753805239   10.22 9.70 9.92   ~ 13 0
55 TYC 8569-552-1 SB* 08 43 56.8075049807 -52 41 05.614522273   12.61 11.77     K0 9 0
56 Cl* IC 2391 PMM 2012 * 08 43 59.0160021924 -53 33 43.651366416   12.57 11.67 11.52   K0 10 0
57 V* V376 Vel BY* 08 44 05.2223844826 -52 53 17.191727447   11.37 10.75 10.74   G3e: 27 0
58 V* V377 Vel BY* 08 44 26.1594105936 -52 42 32.327540858   12.27 11.51 11.23   G9 27 0
59 HD 74955 * 08 44 49.0844110643 -53 04 42.516987756   7.68 7.59     A1V 31 0
60 V* V379 Vel BY* 08 45 26.9315535133 -52 52 02.103937104   13.79 12.76 12.54   K3e 25 0
61 V* V380 Vel BY* 08 45 39.1345972494 -52 25 59.545499157   10.35 9.88 9.98   F8 21 0
62 CPD-53 1875 Ro* 08 45 52.7024139449 -53 27 28.292655882   10.95 10.423 10.16 9.707 G2V 14 1
63 V* OQ Vel RR* 08 46 23.1810289583 -52 50 37.385060426   7.87 7.69     A7V 46 1
64 IC 2602 OpC 10 42 58 -64 24.0           ~ 538 0
65 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 371 2
66 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2090 0
67 VXR HRI 10b * ~ ~     14.45     ~ 3 0
68 Cl* IC 2391 PMM 4888 * ~ ~     13.77     ~ 2 0
69 VXR PSPC 80a * ~ ~     11.98     K2 6 0
70 Cl* IC 2391 PMM 6625 * ~ ~     14.49     ~ 2 0
71 Cl* IC 2391 PMM 6576 * ~ ~     12.54     G6 6 0

    Equat.    Gal    SGal    Ecl

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2019.10.16-23:03:57

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