Search Publications
X-ray emission from dwarf galaxies: IC 2574 revisited
Walter, Fabian; Brinks, Elias; Kerp, Jürgen
Until recently, few unequivocal detections had been reported of the hot, X-ray emitting gas thought to be associated with the large, coherent structures variously described as supershells or superbubbles in dwarf irregular (dIrr) galaxies. In this contribution we report follow-up XMM-Newton and Chandra observations of our ROSAT detection of X-ray …
A survey searching for the epoch of assembling of Hubble types
Pasquali, Anna; de Mello, DuÍlia F.
We have started a survey of galaxies at intermediate redshifts using the HST-STIS parallel fields. Our main goal is to analyse the morphology of faint galaxies in order to estimate the epoch of formation of the Hubble classification sequence. The high resolution of STIS images (0.05″) is ideal for this work and enables us to perform a morphologica…
UV Piscium and the Radiative Flux Scale
Vivekananda Rao, P.; Radhika, P.
Studies of eclipsing binaries with Hipparcos parallaxes are found to define a radiative flux relation for main sequence stars in the spectral range from B6 – F0which is about as well as to the stars derived from angular diameters. At lower temperatures the fluxes of the components fall below this curve which is caused due to the large intrinsic va…