89 citations · 372 across the 17 of their papers we have counts for
10 papers
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…
Selection of ThAr lines for wavelength calibration of echelle spectra and implications for variations in the fine-structure constant
M. T. Murphy, P. Tzanavaris, J. K. Webb +1
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accu…
Searching for hidden AGN in nearby star-forming galaxies with Chandra
P. Tzanavaris, I. Georgantopoulos
(ABRIDGED) AIMS: We searched for X-ray signatures of AGN in a sample of star-forming, relatively early-type, nearby spiral galaxies. Such galaxies are likely to host nuclear super-…
High-resolution simulations of clump-clump collisions using SPH with Particle Splitting
S. Kitsionas, A. P. Whitworth
We investigate, by means of numerical simulations, the phenomenology of star formation triggered by low-velocity collisions between low-mass molecular clumps. The simulations are p…
The global kinematics of the Dumbbell planetary nebula (NGC 6853, M27, PN G060.8-03.6)
J. Meaburn, P. Boumis, P. E. Christopoulou +3
Spatially resolved profiles of the HeII 6560 A, Halpha and [N II] 6548 & 6584 A nebular emission lines have been obtained in two orthogonal long cuts over the Dumbbell planetary ne…