Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Quick Search
My eDoc
Session History
Support Wiki
Direct access to
document ID:

          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 606382.0, MPI für Astronomie / Publikationen_mpia
A benchmark for multiconjugated adaptive optics: VLT-MAD observations of the young massive cluster Trumpler 14
Authors:Rochau, B.; Brandner, W.; Stolte, A.; Henning, T.; Da Rio, N.; Gennaro, M.; Hormuth, F.; Marchetti, E.; Amico, P.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:Monthly Notices of the Royal Astronomical Society
Start Page:949
End Page:959
Audience:Not Specified
Abstract / Description:The Multi-conjugate Adaptive optics Demonstrator (MAD) is the first multiconjugated adaptive optics system at the Very Large Telescope (VLT). We present H and KS observations of the young massive cluster Trumpler 14 revealing the power of MCAO systems by providing a homogeneous Strehl ratio over a large field of view. Mean Strehl ratios of 6.0 and 5.9 per cent with maximum Strehl ratios of 9.8 and 12.6 per cent in H and KS, respectively, show significant improvement of the spatial point spread function (PSF) stability compared to single-conjugated adaptive optics systems. Photometry of our observations cover a dynamic range of Ëœ10 mag including 2-3 times greater number of sources than comparable seeing-limited observations. The colour-magnitude diagram reveals that the massive cluster originated in a recent starburst-like event 1 ± 0.5 Myr ago. We tentatively detect hints for an older population of 3 Myr suggesting that low intensity star formation might have been going on in the HII region for a few Myr. We derive the luminosity function and mass function between 0.1 and 3.2 M&sun; and identify a change in the power-law slope of the mass function at mcËœ 0.53+0.12- 0.10 M&sun;. The MF appears shallow with power-law slopes of Γ1=-0.50 ± 0.11 above mc and Γ2= 0.63 ± 0.32 below mc. Based on Observations with VLT-MAD collected during the Science Verification campaign at the European Southern Observatory, Paranal, Chile.
Free Keywords:instrumentation: adaptive optics; stars: pre-main-sequence; open clusters and associations: individual: Trumpler 14
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.