7 papers · 1 filter
Design of the Gaia photometric systems for stellar parametrization using a population-based optimizer
C. A. L. Bailer-Jones
Large, deep surveys must typically rely on multiband photometry rather than spectroscopy for determining the astrophysical properties (APs) of stars. Yet designing an optimal photo…
Object classification and the determination of stellar parameters with Gaia
C. A. L. Bailer-Jones
Gaia will observe more than one billion objects brighter than V=20, including stars, asteroids, galaxies and quasars. As Gaia performs real time detection (i.e. without an input ca…
Variability and rotation of ultra cool dwarfs
C. A. L. Bailer-Jones
Over the past few years monitoring programs have shown ultra cool dwarfs (UCDs) to be photometrically variable. Of the 60 sources monitored in the field and some 120 monitored in c…
An introduction to artificial neural networks
C. A. L. Bailer-Jones, R. Gupta, H. P. Singh
Artificial neural networks are algorithms which have been developed to tackle a range of computational problems. These range from modelling brain function to making predictions of…
Automated stellar classification for large surveys: a review of methods and results
C. A. L. Bailer-Jones
Current and future large astronomical surveys will yield multiparameter databases on millions or even billions of objects. The scientific exploitation of these will require powerfu…
Surface features, rotation and atmospheric variability of ultra cool dwarfs
C. A. L. Bailer-Jones
Photometric I band light curves of 21 ultra cool M and L dwarfs are presented. Variability with amplitudes of 0.01 to 0.055 magnitudes (RMS) with typical timescales of an hour to s…