2010MNRAS.405..421C


Query : 2010MNRAS.405..421C

2010MNRAS.405..421C - Mon. Not. R. Astron. Soc., 405, 421-435 (2010/June-2)

VLT-MAD observations of the core of 30 Doradus.

CAMPBELL M.A., EVANS C.J., MacKEY A.D., GIELES M., ALVES J., ASCENSO J., BASTIAN N. and LONGMORE A.J.

Abstract (from CDS):

We present H- and Ks-band imaging of three fields at the centre of 30 Doradus (30 Dor) in the Large Magellanic Cloud, obtained as part of the Science Demonstration programme with the Multiconjugate Adaptive optics Demonstrator (MAD) at the Very Large Telescope. Strehl ratios of 15-30 per cent were achieved in the Ks band, yielding near-infrared images of this dense and complex region at unprecedented angular resolution at these wavelengths.

The MAD data are used to construct a near-infrared luminosity profile for R136, the cluster at the core of 30 Dor. Using cluster profiles of the form used by Elson et al., we find the surface brightness can be fit by a relatively shallow power-law function (γ ∼ 1.5-1.7) over the full extent of the MAD data, which extends to a radius of ∼40arcsec (∼10pc). We do not see compelling evidence for a break in the luminosity profile as seen in optical data in the literature, arguing that cluster asymmetries are the dominant source, although extinction effects and stars from nearby triggered star formation likely also contribute. These results highlight the need to consider cluster asymmetries and multiple spatial components in interpretation of the luminosity profiles of distant unresolved clusters.

We also investigate seven candidate young stellar objects reported by Gruendl & Chu from Spitzer observations, six of which have apparent counterparts in the MAD images. The most interesting of these (053839.24-690552.3) appears related to a striking bow-shock-like feature, orientated away from both R136 and the Wolf-Rayet star Brey 75, at distances of 19.5 and 8arcsec (4.7 and 1.9pc in projection), respectively.


Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): instrumentation: adaptive optics - techniques: high angular resolution - open clusters and associations: individual: 30 Doradus - Magellanic Clouds

Simbad objects: 27

goto Full paper

goto View the references in ADS

Number of rows : 27
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6020 1
2 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1180 3
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15530 1
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2073 1
5 RMC 138 sg* 05 38 36.1319623810 -69 05 57.970666081   12.07 11.74   11.45 A0Ia 28 0
6 [GC2009] J053836.48-690524.1 IR 05 38 36.48 -69 05 24.1           ~ 2 0
7 RRG 30 Dor W IRS 4 IR 05 38 38.3 -69 06 30           ~ 2 0
8 RRG 30 Dor W IRS 4a * 05 38 38.45 -69 06 30.7           ~ 4 0
9 2MASS J05383849-6906297 NIR 05 38 38.491 -69 06 29.77           ~ 3 0
10 [P93] 702 * 05 38 39.280 -69 05 52.69   16.78 16.80     O9.5: 8 0
11 2MASS J05383933-6905522 Y*O 05 38 39.337 -69 05 52.25           ~ 4 0
12 SSTISAGEMA J053839.68-690537.9 MIR 05 38 39.70 -69 05 38.1           ~ 7 0
13 2MASS J05383971-6905386 Y*O 05 38 39.720 -69 05 38.65           ~ 5 0
14 Cl* NGC 2070 SMB 206 * 05 38 39.750 -69 05 39.21 15.104 15.88 15.67   15.42 O((n)) 12 0
15 Brey 75 WR* 05 38 40.53 -69 05 57.2   12.84 12.75   12.34 WN6h 59 0
16 RMC 139 WR* 05 38 42.3548071421 -69 04 58.201053806   12.04 11.94     O6.5Iafc+O6Iaf 86 0
17 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1814 1
18 OGLE LMC-ECL-21448 Y*O 05 38 43.52 -69 06 28.7 17.648 17.374 17.365   17.340 ~ 6 0
19 2MASS J05384507-6905086 Y*O 05 38 45.073 -69 05 08.64   14.73 14.72     O9V(n)p 18 0
20 HD 269928 WR* 05 38 57.0668705166 -69 06 05.660972436   12.02 11.94 12.00 11.58 WN6/7 123 0
21 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5478 6
22 Mrk 34 Sy2 10 34 08.606 +60 01 52.33   15.71 14.65     ~ 227 1
23 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 990 1
24 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1595 0
25 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3956 4
26 NAME Sco OB 1 As* 16 53.5 -41 57           ~ 197 0
27 NAME Local Group GrG ~ ~           ~ 7353 0

To bookmark this query, right click on this link: simbad:objects in 2010MNRAS.405..421C and select 'bookmark this link' or equivalent in the popup menu


2021.09.18-00:54:08

© Université de Strasbourg/CNRS

    • Contact