7 papers · 1 filter
X-ray properties of the "Composite" Seyfert/Star-forming galaxies
A. Wolter, G. Trinchieri, R. Della Ceca +7
An enigmatic, small class of IR and X-ray luminous sources, named ``Composite'' starburst/Seyfert galaxies, has been defined from IRAS and RASS data. The objects have optical spect…
The Cartwheel ring under X-ray light
A. Wolter, G. Trinchieri
The Cartwheel, archetypical ring galaxy with strong star formation activity concentrated in a peculiar annular structure, has been imaged with the CHANDRA ACIS-S instrument. We pre…
Broad band properties of medium and low Lx/Lb Early Type Galaxies
G. Trinchieri, S. Pellegrini, A. Wolter +2
We have measured the spectral properties of five galaxies of low to intermediate Lx/Lb ratios with BeppoSAX and ASCA. A hard component (kT ~4-10 keV) is observed in all galaxies. I…
Peculiar properties of 2 unusually X-ray bright early type galaxies
G. Trinchieri, W. Pietsch
Two X-ray bright early type galaxies, selected for their unusually high X-ray to optical flux ratio, have been observed at high spatial resolution with the ROSAT HRI. Both sources…
Broad Band X-ray Spectra of M31 Sources with BeppoSAX
Ginevra Trinchieri, Gian Luca Israel, Lucio Chiappetti +5
We present the first spectral study of the X-ray emitting stellar sources in M31 in the energy band from 0.1 to 10 keV. We find that the globular cluster sources have spectral char…
High energy phenomena in the Cartwheel's ring
Anna Wolter, Ginevra Trinchieri, Angela Iovino
We present the first X-ray detection of the Cartwheel's ring. The impact that created the characteristic optical structure is responsible also for an enhanced level of star formati…