37 citations · 51 across the 4 of their papers we have counts for
7 papers · 1 filter
On class visualisation for high dimensional data: Exploring scientific datasets
Ata Kaban, Jianyong Sun, Somak Raychaudhury +1
Parametric Embedding (PE) has recently been proposed as a general-purpose algorithm for class visualisation. It takes class posteriors produced by a mixture-based clustering algori…
Young stellar populations in early-type galaxies in the Sloan Digital Sky Survey
Louisa A. Nolan, Somak Raychaudhury, Ata Kaban
We use a purely data-driven rectified factor analysis to identify early-type galaxies with recent star formation in DR4 of the SDSS Spectroscopic Catalogue. We compare the spectra…
The star-formation histories of elliptical galaxies across the fundamental plane
Louisa A. Nolan, J. S. Dunlop, B. Panter +3
We present the first results from a study designed to test whether, given high-quality spectrophotometry spanning the mid-UV--optical wavelength regime, it is possible to distingui…
A data-driven Bayesian approach for finding young stellar populations in early-type galaxies from their UV-optical spectra
L. A. Nolan, M. O. Harva, A Kaban +1
We present the results of a novel application of Bayesian modelling techniques, which, although purely data driven, have a physically interpretable result, and will be useful as an…
A Chandra Observation of the Nearby Lenticular Galaxy NGC 5102: Where are the X-ray Binaries?
R. P. Kraft, L. A. Nolan, T. J. Ponman +2
We present results from a 34 ks Chandra/ACIS-S observation of the nearby (d=3.1 Mpc) lenticular galaxy NGC 5102, previously shown to have an unusually low X-ray luminosity. We dete…
Finding Young Stellar Populations in Elliptical Galaxies from Independent Components of Optical Spectra
Ata Kaban, Louisa A. Nolan, Somak Raychaudhury
Elliptical galaxies are believed to consist of a single population of old stars formed together at an early epoch in the Universe, yet recent analyses of galaxy spectra seem to ind…