On the multiple supernova population of Arp 299: constraints on progenitor properties and host galaxy star formation characteristics

On the nature of faint mid-infrared sources in M33

On The Nature of Fossil Galaxy Groups

On the nature of IC 3328, an early-type dwarf galaxy with weak spiral structure

On the Nature of Star Formation at Large Galactic Radii

On the nature of sub-millimetre galaxies

On the Nature of the Apparent Ring Galaxy SDSS J075234.33+292049.8

On the nature of the first galaxies selected at 350 microns

On the Nature of the HII Regions in the Extended Ultraviolet Disc of NGC 4625

On the nature of the progenitors of three type II-P supernovae: 2004et, 2006my and 2006ov

On the necessity of the revisions for the cosmological matter perturbations from the general relativity

On the non-evolution of the dependence of black hole masses on bolometric luminosities for QSOs

On the nuclear obscuration of H2O maser galaxies

On the Number of Cosmic Strings in Dark Energy Cosmologies

On the observed distributions of black hole masses and Eddington ratios from radiation pressure corrected virial indicators

On the Observed W_MgII--L_[OII] Correlation in SDSS QSO Spectra

On the occupation of X-ray selected galaxy groups by radio AGN since z=1.3

On the offset of Short Gamma-ray Bursts

On the optimality of the spherical Mexican hat wavelet estimator for the primordial non-Gaussianity

On the Orbits of Infalling Satellite Halos