2009A&A...501..553D


Query : 2009A&A...501..553D

2009A&A...501..553D - Astronomy and Astrophysics, volume 501, 553-562 (2009/7-2)

Chemical composition of the young open clusters IC 2602 and IC 2391.

D'ORAZI V. and RANDICH S.

Abstract (from CDS):

Galactic open clusters have been long recognized as one of the best tools to investigate the chemical content of Galactic disk and its time evolution. In the last decade, many efforts have been directed to chemically characterize the old and intermediate age population; surprisingly, the chemical content of the younger and close counterpart remains largely undetermined. In this paper we present the abundance analysis of a sample of 15 G/K members of the young pre-main sequence clusters IC 2602 and IC 2391. Along with IC 4665, these are the first pre-main sequence clusters for which a detailed abundance determination has been carried out so far. We analyzed high-resolution, high S/N spectra acquired with different instruments (UVES and CASPEC at ESO, and the echelle spectrograph at CTIO), using MOOG and equivalent width measurements. Along with metallicity ([Fe/H]), we measured Na I, Si I, Ca I, Ti I and Ti II, and Ni I abundances. Stars cooler than ∼5500 show lower Ca I, Ti I, and Na I than warmer stars. By determining Ti II abundances, we show that, at least for Ti, this effect is due to NLTE and over-ionization. We find average metallicities [Fe/H]=0±0.01 and [Fe/H]=-0.01±0.02 for IC 2602 and IC 2391, respectively. All the [X/Fe] ratios show a solar composition; the accurate measurements allow us to exclude the presence of star-to-star scatter among the members.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/501/553): stars.dat tableew.dat>

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME THA As* 00 00 -62.0           ~ 391 0
2 Cl Blanco 1 OpC 00 03 25 -29 57.5           ~ 267 0
3 NGC 752 OpC 01 56 54 +37 47.6           ~ 571 0
4 Cl* NGC 1039 JP 133 Ro* 02 41 28.1443876659 +42 38 37.136197769   14.384 13.662   12.857 ~ 14 0
5 NGC 1039 OpC 02 42 07 +42 43.3           ~ 389 0
6 Cl Melotte 20 OpC 03 26 28 +48 58.5           ~ 785 0
7 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3133 0
8 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2806 0
9 HD 32347 PM* 05 03 07.6578243018 +13 43 50.412068300   9.372 8.596 8.182 7.810 K0 101 0
10 NGC 2451A OpC 07 42 57 -38 15.8           ~ 93 0
11 NGC 2516 OpC 07 58 06 -60 48.0           ~ 627 0
12 VXR PSPC 3 X 08 38 25.9 -52 56 48     10.95     ~ 4 0
13 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1343 0
14 IC 2391 OpC 08 41 10 -52 59.5           ~ 754 0
15 Cl* IC 2391 PMM 6478 * 08 41 10.9813387802 -52 31 46.693418225   11.74 11.50     ~ 15 0
16 CPD-52 1614 SB* 08 42 46.6081760006 -53 01 01.345805604   10.7 10.3     ~ 29 0
17 VXR PSPC 67 X 08 43 54.9 -52 41 25     11.71     ~ 4 0
18 V* V376 Vel BY* 08 44 05.2223844826 -52 53 17.191727447   11.37 10.75 10.74   G3e: 34 0
19 V* V377 Vel BY* 08 44 26.1594105936 -52 42 32.327540858   12.27 11.51 11.23   G9 36 0
20 V* V379 Vel BY* 08 45 26.9315535133 -52 52 02.103937104   13.79 12.76 12.54   K3e 32 0
21 HD 91698 * 10 33 28.5679315781 -65 22 06.300305789   8.01 8.03     B6V 29 0
22 HD 307806 * 10 34 15.3609957604 -64 24 33.878967087   10.83 10.56     A0 4 0
23 HD 92175 * 10 36 47.9822369464 -65 05 00.894414366   9.99 8.82     G8/K0III 7 0
24 HD 92275 * 10 37 38.1617877498 -63 37 52.782513858   9.22 9.14     B8III/IV 18 0
25 HD 307844 * 10 38 39.5624127264 -63 34 22.316798869   10.71 9.319     K6 5 0
26 HD 307926 * 10 40 23.1365236400 -64 01 15.550815653   10.9 9.63     K0 7 0
27 HD 307921 * 10 41 53.7859805013 -63 53 58.797038132   10.9 9.11     M3 7 0
28 V* V555 Car BY* 10 42 07.0838573415 -64 46 07.836732097   12.40       G 25 0
29 IC 2602 OpC 10 42 27 -64 25.6           ~ 592 0
30 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 410 1
31 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1199 1
32 IC 4665 OpC 17 46 13 +05 36.9           ~ 330 0
33 NGC 6475 OpC 17 53 47 -34 50.5           ~ 348 0
34 NGC 6633 OpC 18 27 31.2 +06 34 12           ~ 342 0
35 IC 4756 OpC 18 38 31.2 +05 29 24           ~ 208 0
36 NAME del Lyr Cluster OpC 18 54 16 +36 53.9   4.58 3.8     ~ 51 0
37 NAME Pleiades Moving Group MGr ~ ~           ~ 255 1

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2021.11.30-00:42:15

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