University of Surrey

Test tubes in the lab Research in the ATI Dance Research

VLT-MAD observations of the core of 30 Doradus

Campbell, MA, Evans, CJ, Mackey, AD, Gieles, M, Alves, J, Ascenso, J, Bastian, N and Longmore, AJ (2010) VLT-MAD observations of the core of 30 Doradus Monthly Notices of the Royal Astronomical Society.

Full text not available from this repository.

Abstract

We present H- and Ks-band imaging of three fields at the centre of 30 Doradus in the Large Magellanic Cloud, obtained as part of the Science Demonstration programme with the Multi-conjugate Adaptive optics Demonstrator (MAD) at the Very Large Telescope. Strehl ratios of 15-30% 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 (gamma~1.5-1.7) over the full extent of the MAD data, which extends to a radius of ~40" (~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 (GC09: 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 8" (4.7 and 1.9pc in projection), respectively.

Item Type: Article
Authors :
NameEmailORCID
Campbell, MAUNSPECIFIEDUNSPECIFIED
Evans, CJUNSPECIFIEDUNSPECIFIED
Mackey, ADUNSPECIFIEDUNSPECIFIED
Gieles, Mm.gieles@surrey.ac.ukUNSPECIFIED
Alves, JUNSPECIFIEDUNSPECIFIED
Ascenso, JUNSPECIFIEDUNSPECIFIED
Bastian, NUNSPECIFIEDUNSPECIFIED
Longmore, AJUNSPECIFIEDUNSPECIFIED
Date : 1 February 2010
Identification Number : https://doi.org/10.1111/j.1365-2966.2010.16447.x
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:40
Last Modified : 17 May 2017 15:05
URI: http://epubs.surrey.ac.uk/id/eprint/836270

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800