192 citations · 614 across the 13 of their papers we have counts for
13 papers
Algorithmic comparisons of decaying, isothermal, supersonic turbulence
S. Kitsionas, C. Federrath, R. Klessen +10
Contradicting results have been reported in the literature with respect to the performance of the numerical techniques employed for the study of supersonic turbulence. We aim at ch…
Star Formation at Very Low Metallicity. V. The Greater Importance of Initial Conditions Compared to Metallicity Thresholds
A. -K. Jappsen, M. -M. Mac Low, S. C. O. Glover +2
The formation of the first stars out of metal-free gas appears to result in stars at least an order of magnitude more massive than in the present-day case. We here consider what co…
SPH simulations of star/planet formation triggered by cloud-cloud collisions
Spyridon Kitsionas, Anthony P. Whitworth, Ralf S. Klessen
We present results of hydrodynamic simulations of star formation triggered by cloud-cloud collisions. During the early stages of star formation, low-mass objects form by gravitatio…
XMM and Chandra measurements of the AGN intrinsic absorption: dependence on luminosity and redshift
A. Akylas, I. Georgantopoulos, A. Georgakakis +2
We combine bright XMM data with the Chandra Deep Field South observations in order to explore the behavior of the intrinsic AGN absorption, as a function of redshift and luminosity…
The Serendipitous XMM-Newton Cluster Athens Survey (SEXCLAS): Sample selection and the cluster log N - log S
V. Kolokotronis, A. Georgakakis, S. Basilakos +4
In this paper we serendipitously identify X-ray cluster candidates using XMM-Newton archival observations complemented by 5-band optical photometric follow-up observations (r~23 ma…
Detection of the white dwarf and the secondary star in the new SU UMa dwarf nova HS 2219+1824
P. Rodriguez-Gil, B. T. Gaensicke, H. -J. Hagen +4
We report the discovery of a new, non-eclipsing SU UMa-type dwarf nova, HS 2219+1824. Photometry obtained in quiescence (V ~ 17.5) reveals a double-humped light curve from which we…