2009A&A...499..541S


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.18CEST09:20:38

2009A&A...499..541S - Astronomy and Astrophysics, volume 499, 541-555 (2009/5-4)

A deep multi-band investigation of IC 2391.

SPEZZI L., PAGANO I., MARINO G., LETO G., YOUNG E., SIEGLER N., BALOG Z., MESSINA S., DISTEFANO E., MERIN B. and BARRADO Y NAVASCUES D.

Abstract (from CDS):

We report the outcome of a deep multiwavelength study of the IC 2391 young open cluster. We attempt to uncover new low-mass and sub-stellar members of the cluster and identify new debris disk objects. We observed a 30x30 square arcmin area in IC 2391 using the wide-field imager at the ESO 2.2m telescope. The completeness limits of the photometry at the 3σ level are V=24.7, RC=23.7, and IC=23.0, faint enough to reveal sub-stellar members down to ∼0.03M. Our membership criteria are based on use of our optical data in combination with JHKS magnitudes from the 2MASS catalog. We also estimate the physical parameters of the selected candidates. Debris disk candidates are identified on the basis of their infrared excess emission using near- and mid-infrared photometry from the Spitzer Space Telescope. Our optical survey, which has a limiting magnitude at the 3σ level 1-2mag fainter than previous optical surveys conducted in IC 2391, revealed 29 new low-mass member candidates of the cluster. We estimate the contamination to be at least ∼50%. We constrain the fraction of sub-stellar objects in the range 8-15% and discuss possible explanations of the deficit of brown dwarfs in this cluster. We also identify 10 candidates in the cluster showing IR excess emission consistent with the presence of debris disks.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: low-mass, brown dwarfs - stars: pre-main sequence - stars: circumstellar matter - ISM: individual objects: IC 2391

Nomenclature: Tables 4-5: [SPM2009] WFI JHHMMSSss+DDMMSSs N=37.

Simbad objects: 44

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Number of rows : 44

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 SA 92- reg 00 55 03.80 +00 47 13.2           ~ 98 0
2 Cl Melotte 20 OpC 03 26 42 +48 48.0           ~ 753 0
3 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 315 0
4 Cl* IC 2391 CTIO 25 * 08 37 15.2082332259 -53 24 12.985241474     18.29     ~ 3 0
5 IC 2391 OpC 08 40 32 -53 02.0           ~ 721 0
6 [SPM2009] WFI J08403964-5250429 * 08 40 39.6416515548 -52 50 42.830282942     21.24 19.82 17.83 ~ 1 0
7 UCAC2 8960307 * 08 40 45.1286717934 -52 48 52.165278298   17.10 16.60 15.39 13.97 ~ 4 0
8 UCAC3 74-45510 * 08 40 45.7210814361 -53 01 04.820427326     14.50 13.36 12.61 ~ 1 0
9 Cl* IC 2391 D 97 * 08 40 46.7616172650 -53 02 48.284432785   18.90 19.25 18.63 17.80 ~ 2 0
10 UCAC3 75-42178 * 08 40 55.1400365962 -52 57 22.403314615   15.52 14.59 13.39 12.48 ~ 1 0
11 UCAC2 8960379 * 08 41 00.1938720097 -52 49 08.811318131   17.53 16.71 15.60 14.78 ~ 1 0
12 Cl* IC 2391 RB 729 * 08 41 08.04 -53 00 04.7   19.546 17.955     ~ 3 0
13 2MASS J08410804-5300046 * 08 41 08.042 -53 00 04.65     18.02 16.82 14.84 ~ 1 0
14 UCAC2 8960414 * 08 41 08.1153854466 -52 55 02.519019319     14.69 13.45 12.30 ~ 1 0
15 [SPM2009] WFI J08410886-5248387 * 08 41 08.8508397073 -52 48 38.669858305   18.77 18.74 17.46 15.24 ~ 3 0
16 DENIS J084109.3-530212 * 08 41 09.2865091028 -53 02 12.776012166   17.51 17.58 16.38 14.29 ~ 4 0
17 Cl* IC 2391 RB 955 PM* 08 41 18.6306773448 -52 58 54.629232561   19.61 18.83 17.64 15.78 ~ 2 0
18 Cl* IC 2391 D 112 * 08 41 21.7504513584 -52 47 28.818242606   20.10 19.33 18.24 17.65 ~ 2 0
19 DENIS J084122.1-530446 * 08 41 22.2035453710 -53 04 46.442367256     17.16 15.98 14.03 ~ 5 0
20 [SPM2009] WFI J08412550-5300154 * 08 41 25.5048105288 -53 00 15.435419891     18.73 17.92 17.49 ~ 1 0
21 Cl* IC 2391 CTIO 100 * 08 41 35.9637966182 -53 09 26.828172231   19.37 18.52 17.27 15.14 ~ 6 1
22 [SPM2009] WFI J08413888-5259492 * 08 41 38.8695080285 -52 59 49.184194123   17.22 17.20 16.30 15.73 ~ 1 0
23 UCAC3 75-42525 * 08 41 39.2942151207 -52 52 56.372430104   15.76 14.93 13.81 12.89 ~ 1 0
24 [SPM2009] WFI J08414904-5255192 * 08 41 49.0500479320 -52 55 19.126570479   19.56 18.52 17.46 16.77 ~ 1 0
25 1RXS J084153.5-525800 * 08 41 53.5750469500 -52 57 55.610482631   18.12 17.44 16.24 14.31 ~ 6 0
26 V* V368 Vel BY* 08 41 57.8483931741 -52 52 13.940974469   14.59 13.76 12.74 12.03 K7e 26 0
27 Cl* IC 2391 AR 232 * 08 42 24.5639953037 -52 59 57.004211172   13.71 12.71 11.91 11.35 ~ 3 0
28 Cl* IC 2391 PMM 4695 * 08 42 30.6877161444 -52 57 34.480949225   14.95 14.63 13.49 12.45 M1e 10 1
29 [SPM2009] WFI J08424731-5309235 * 08 42 47.2705718562 -53 09 22.832062561     20.36 18.91 16.22 ~ 3 0
30 [SPM2009] WFI J08424850-5303187 * 08 42 48.4752768981 -53 03 18.387056793   19.07 18.55 17.26 15.20 ~ 3 0
31 Cl* IC 2391 CTIO 126 * 08 42 49.0339924210 -52 52 15.774249460           ~ 5 0
32 VXR PSPC 55a * 08 42 58.6974223034 -53 05 54.131113947   17.56 16.55 15.33 13.45 ~ 5 0
33 [SPM2009] WFI J08425988-5305074 * 08 42 59.8433136530 -53 05 06.984215931     20.65 19.19 16.75 ~ 2 0
34 UCAC3 74-46480 * 08 43 02.9043691942 -53 02 25.422635966   15.07 13.97 12.87 11.94 ~ 2 0
35 [SPM2009] WFI J08431228-5251411 * 08 43 12.2702415746 -52 51 40.988528094     22.85 21.32 18.92 ~ 1 0
36 UCAC2 8716040 * 08 43 18.5618654078 -53 06 23.567410794   13.97 13.41 12.43   ~ 1 0
37 2MASS J08433362-5259544 * 08 43 33.6240556986 -52 59 54.439783733     22.71 20.88 17.88 ~ 1 0
38 [SPM2009] WFI J08433843-5246379 * 08 43 38.4189500997 -52 46 37.730448572   18.09 16.96 15.49 14.24 ~ 1 0
39 Cl* IC 2391 PP 9 * 08 43 39.3506010776 -53 07 55.638292239   18.38 18.08 16.87 14.82 ~ 4 0
40 [SPM2009] WFI J08433945-5248576 * 08 43 39.4397305769 -52 48 57.363415225   19.74 18.79 17.60 15.86 ~ 1 0
41 UCAC2 8961152 * 08 43 46.3683174544 -52 57 03.230506788   14.48 13.73 12.77 11.97 ~ 2 0
42 UCAC2 8961159 * 08 43 47.4956234444 -52 50 13.394120585   16.01 15.92 14.59 13.64 ~ 1 0
43 [SPM2009] WFI J08434909-5307269 * 08 43 49.0602875209 -53 07 26.324631195   19.51 18.64 17.48 16.00 ~ 1 0
44 UCAC2 8716257 * 08 44 01.975 -53 10 35.34   15.20 14.95 13.94 13.24 ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.09.18-09:20:38

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