395 citations · 4.3k across the 120 of their papers we have counts for
8 papers · 1 filter
Star formation in galaxies along the Pisces-Cetus Supercluster filaments
Scott C. Porter, Somak Raychaudhury
We investigate the variation of current star formation in galaxies as a function of distance along three supercluster filaments, each joining pairs of rich clusters, in the Pisces-…
The Group Evolution Multiwavelength Study (GEMS): The near-infrared luminosity function of nearby galaxy groups
Trevor A. Miles, Somak Raychaudhury, Paul A. Russell
We present J and K-band luminosity functions (LF) for the Group Evolution Multiwavelength Study (GEMS) sample of 60 nearby groups of galaxies, with photometry from the 2MASS survey…
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…
The optical and near-infrared properties of nearby groups of galaxies
Somak Raychaudhury, Trevor A. Miles
We present a study of the optical (BRI) and near-infrared (JHK) luminosity fuctions (LFs) of the GEMS sample of 60 nearby groups of galaxies between 0<z<0.04, with our optical CCD…
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…
Chandra Observations of the X-ray Point Source Population in NGC 4636
Jennifer Posson-Brown, Somak Raychaudhury, William Forman +2
We present the X-ray point source population in the nearby Virgo elliptical galaxy NGC 4636 from 3 Chandra/ACIS observations, totaling 193 ks, taken over 3 years. Using wavelet dec…