2007A&A...476..199A


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET18:42:29

2007A&A...476..199A - Astronomy and Astrophysics, volume 476, 199-215 (2007/12-2)

NTT and VLT diffraction limited imaging of Trumpler 14: revealing a massive core-halo cluster.

ASCENSO J., ALVES J., VICENTE S. and LAGO M.T.V.T.

Abstract (from CDS):

We present the deepest and highest resolution near-infrared imaging to date of cluster Trumpler 14 in Carina. Our goal is to identify and characterise the young stellar population of this massive cluster. We made use of deep and wide-field NIR images from NTT and VLT observations, that were sensitive enough to detect substellar sources at the distance to this cluster, and at high enough resolution (VLT diffraction limited) to fully resolve the core of the cluster crowded with O stars. We find that Tr14 has a well-defined core-halo structure, where less than 30% of the cluster's members reside in the core. The core is well characterised by a King function with a core radius of 0.17' (0.14pc at the adopted distance) and a constant baseline, the halo, of 125sources/pc2. Despite the unusually large number of OB stars, the central number density at zero radius is ∼7.3x103pc–3, which is loose in comparison with similar clusters. We find a normal reddening law towards the cluster and derive a global reddening of Av=2.6±0.3mag. We find convincing evidence of a sparse foreground population (∼5 sources/arcmin2) reddened by about Av=1.4mag, which we suggest is not associated with Tr14 but is most likely an older population produced in the nearby young clusters of this complex. The colour-magnitude diagrams are compatible with ages between ``zero'' and ∼5Myr, although the sources from the core of the cluster appear to concentrate on the youngest isochrones, suggesting that the halo population is, on average, slightly older than the core population. Using a set of simplistic, fixed-age, mass-luminosity relations, we derive a mass of 104M for the cluster. From the NACO JHKsL' data, we estimate a fraction of infrared-excess sources of 35%, although this is likely to be an underestimate given the bright completeness limits of the L' band. Finally, we argue that the formerly identified proplyd candidates that fall inside our survey are not proplyds but remnants of the disrupted molecular cloud that surround the cluster. We also find a series of interesting objects in our field that are worthy of future attention: a candidate photoionised proplyd best seen in the L' band, a compact nebula surrounding an early type star, and a tentative proplyd/small shock associated with a faint source.

Abstract Copyright:

Journal keyword(s): HII regions - open clusters and associations: individual: Trumpler 14 - stars: formation - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/476/199): naco.dat sofi.dat>

Nomenclature: catalog NACO: Cl* Trumpler 14 NACO NNN (Nos 1-178). catalog SOFI: Cl* Trumpler 14 SOFI NNNN (Nos 1-4739). Text: [AAV2007] JHHMMSS.s+DDMMSS N=2.

Status in Simbad:  will not be processed

Simbad objects: 24

goto Full paper

goto View the reference in ADS

Number of rows : 24

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 M 42 HII 05 35 17.3 -05 23 28           ~ 3658 0
2 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1676 2
3 NGC 2316 Cl* 06 59 41.7 -07 46 07           ~ 45 1
4 RCW 36 HII 08 59 00.9 -43 44 10     15.20     ~ 123 0
5 NAME Carina I HII Region HII 10 43 32 -59 35.0           ~ 50 0
6 [SBM2003] J104339.1-593257 PoC 10 43 39.1 -59 32 57           ~ 2 0
7 [SBM2003] J104339.8-593247 PoC 10 43 39.8 -59 32 47           ~ 2 0
8 Cl Trumpler 14 OpC 10 43 56 -59 33.0   5.70 5.5     ~ 413 0
9 [AAV2007] J104357.3-593257 ? 10 43 57.300 -59 32 57.59           ~ 1 0
10 HD 93129 ** 10 43 57.486 -59 32 51.44 6.26 7.06 6.90     O2If*+O3.5V((f)) 186 1
11 [SBM2003] J104359.6-593238 PoC 10 43 59.6 -59 32 38           ~ 2 0
12 Cl Collinder 228 OpC 10 44 00 -60 05.2   4.58 4.4     ~ 184 0
13 [SBM2003] J104402.3-593214 PoC 10 44 02.3 -59 32 14           ~ 2 0
14 [SBM2003] J104402.5-593218 PoC 10 44 02.5 -59 32 18           ~ 2 0
15 [SBM2003] J104402.8-593209 PoC 10 44 02.8 -59 32 09           ~ 2 0
16 Cl Trumpler 14 29 * 10 44 05.0743332839 -59 33 41.340850432 12.138 12.437 11.943   11.019 B1.5V 24 0
17 [SBM2003] J104411.2-593325 PoC 10 44 11.2 -59 33 25           ~ 2 0
18 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 869 2
19 C 1042-593 OpC 10 44 39.00 -59 33 36.0     6.8     ~ 56 0
20 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2154 0
21 Cl Trumpler 16 OpC 10 45 10 -59 43.0   5.35 5.0     ~ 415 0
22 NGC 3603 HII 11 15 24 -61 15.0           ~ 922 2
23 NGC 3606 GiG 11 16 15.645 -33 49 38.67   13.42   11.72   ~ 57 0
24 NAME Carina Region reg ~ ~           ~ 146 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2007A&A...476..199A and select 'bookmark this link' or equivalent in the popup menu


2019.11.21-18:42:29

© Université de Strasbourg/CNRS

    • Contact