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Strong lensing of gravitational waves as seen by LISA
M. Sereno, A. Sesana, A. Bleuler +3
We discuss strong gravitational lensing of gravitational waves from merging of massive black hole binaries in the context of the LISA mission. Detection of multiple events would pr…
Colour and stellar population gradients in galaxies
C. Tortora, N. R. Napolitano, V. F. Cardone +3
We discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metall…
Central dark matter trends in early-type galaxies from strong lensing, dynamics and stellar populations
C. Tortora, N. R. Napolitano, A. J. Romanowsky +1
We analyze the correlations between central dark matter (DM) content of early-type galaxies and their sizes and ages, using a sample of intermediate-redshift (z ~ 0.2) gravitationa…
Limits on decaying dark energy density models from the CMB temperature-redshift relation
Philippe Jetzer, Denis Puy, Monique Signore +1
The nature of the dark energy is still a mystery and several models have been proposed to explain it. Here we consider a phenomenological model for dark energy decay into photons a…
Gravitational waves from intermediate-mass black holes in young clusters
M. Mapelli, C. Huwyler, L. Mayer +2
Massive young clusters (YCs) are expected to host intermediate-mass black holes (IMBHs) born via runaway collapse. These IMBHs are likely in binaries and can undergo mergers with o…
M31 pixel lensing event OAB-N2: a study of the lens proper motion
S. Calchi Novati, M. Dall'Ora, A. Gould +12
We present an updated analysis of the M31 pixel lensing candidate event OAB-N2 previously reported in Calchi Novati et al. (2009). Here we take advantage of new data both astrometr…