36 citations · 187 across the 15 of their papers we have counts for
15 papers
Multiband analysis of the O'Connell effect in 14 eclipsing binaries
D. Flores Cabrera, M. Catelan, A. Papageorgiou +1
The O'Connell effect is a phenomenon in eclipsing binary (EB) systems that consists of unequal maxima in a light curve when out of eclipse. Despite being known for decades and with…
Discovery of optical candidate supernova remnants in Sagittarius
J. Alikakos, P. Boumis, P. E. Christopoulou +1
During an [O III] survey for planetary nebulae, we identified a region in Sagittarius containing several candidate Supernova Remnants and obtained deep optical narrow-band images a…
First optical detection from the supernova remnant G 15.1-1.6
P. Boumis, J. Alikakos, P. E. Christopoulou +3
Deep optical CCD images of the supernova remnant G 15.1-1.6 were obtained and filamentary and diffuse emission has been discovered. The images, taken in the emission lines of Halph…
X-ray supernova remnants in nearby galaxies
Ioanna Leonidaki, Andreas Zezas, Panayotis Boumis
We present the initial results from a study of the SNR population in a sample of six nearby galaxies (NGC 2403, NGC 4214, NGC 4449, NGC 5204, NGC 3077, NGC 4395) based on Chandra a…
A principal component analysis approach to the morphology of Planetary Nebulae
Stavros Akras, Panayotis Boumis
Principal Component Analysis (PCA) is a well-known technique used to decorrelate a set of vectors. It has been applied to explore the star formation history of galaxies or to deter…
Optical colours of AGN in the Extended Chandra Deep Field South: Obscured black holes in early type galaxies
E. Rovilos, I. Georgantopoulos
We investigate the optical colours of X-ray sources from the Extended Chandra Deep Field South (ECDFS) using photometry from the COMBO-17 survey, aiming to explore AGN - galaxy fee…