9 papers
The X-ray luminosity function of galaxies and its evolution
I. Georgantopoulos, P. Tzanavaris
We compile one of the largest ever samples to probe the X-ray normal galaxy luminosity function and its evolution with cosmic time. In particular, we select 207 galaxies (106 late…
The galaxy luminosity function and its evolution with Chandra
P. Tzanavaris, I. Georgantopoulos
AIMS: We have compiled one of the largest normal-galaxy samples ever to probe X-ray luminosity function evolution separately for early and late-type systems. METHODS: We selected 2…
Abundance variations and first ionization potential trends during large stellar flares
R. Nordon, E. Behar
The Solar First Ionization Potential (FIP) effect, where low-FIP elements are enriched in the corona relative to the photosphere, while high-FIP abundances remain unchanged, has be…
Molecular gas in QSO host galaxies
T. Bertram, A. Eckart, M. Krips +3
We present the results of a survey for CO line emission from a sample of nearby QSO hosts taken from the Hamburg/ESO survey (HES) and the Veron-Cetty and Veron quasar catalogue. Fr…
Molecular gas in the galaxy cluster Abell 262. CO observations of UGC 1347 and other galaxies of the cluster
T. Bertram, A. Eckart, M. Krips +2
We present millimeter CO line emission observations of 12 galaxies within the Abell 262 cluster, together with L_FIR data, in the context of a possible molecular gas deficiency wit…
Enhanced X-ray variability from V1647 Ori, the young star in outburst illuminating McNeil's Nebula
N. Grosso, J. H. Kastner, H. Ozawa +5
We report a ~38 ks X-ray observation of McNeil's Nebula obtained with XMM on 2004 April 4. V1647 Ori, the young star in outburst illuminating McNeil's Nebula, is detected with XMM…