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- Foundation for Research and Technology HellasGR11 papers
- National Observatory of AthensGR9 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- University of ManchesterGB8 papers
- CEA Paris-SaclayFR7 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR7 papers
- European Organization for Nuclear ResearchCH6 papers
- National Technical University of AthensGR6 papers
- National Centre of Scientific Research "Demokritos"GR5 papers
- University of CambridgeGB5 papers
- Forschungszentrum JülichDE4 papers
- Imperial College LondonGB4 papers
8 papers · 1 filter
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…
Deep optical observations of the interaction of the SS 433 microquasar jet with the W 50 radio continuum shell
P. Boumis, J. Meaburn, J. Alikakos +6
Four mosaics of deep, continuum-subtracted, CCD images have been obtained over the extensive galactic radio continuum shell, W 50, which surrounds the remarkable stellar system SS…
Searching for decaying axion-like dark matter from clusters of galaxies
Signe Riemer-Sorensen, Konstantin Zioutas, Steen H. Hansen +3
We consider the possibility of constraining the lifetime of radiatively decaying dark matter particles in clusters of galaxies inspired from generic axions of the Kaluza-Klein type…