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12 papers · 1 filter
Observational Properties of SNe Ia Progenitors Close to the Explosion
Amedeo Tornambe', Luciano Piersanti, Gabriella Raimondo +1
We determine the expected signal in various observational bands of Supernovae Ia progenitors just before the explosion by assuming the rotating Double Degenerate scenario. Our resu…
A Universal Transition in Atmospheric Diffusion for Hot Subdwarfs Near 18,000 K
T. M. Brown, J. M. Taylor, S. Cassisi +6
In the color-magnitude diagrams (CMDs) of globular clusters, when the locus of stars on the horizontal branch (HB) extends to hot temperatures, discontinuities are observed at colo…
Intra-cluster patches of baryons in the core of the Fornax cluster
E. Iodice, M. Spavone, M. Cantiello +12
In the core of the Fornax cluster, on the West side of NGC1399, we have detected a previously unknown region of intra-cluster light (ICL). It is made up by several faint ($μ_r \sim…
Theoretical investigation on the mass loss impact on asteroseismic grid-based estimates of mass, radius, and age for RGB stars
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
We aim to perform a theoretical evaluation of the impact of the mass loss indetermination on asteroseismic grid based estimates of masses, radii, and ages of stars in the red giant…
The ISLAnds Project III: Variable Stars in Six Andromeda Dwarf Spheroidal Galaxies
Clara E. Martínez-Vázquez, Matteo Monelli, Edouard J. Bernard +15
We present a census of variable stars in six M31 dwarf spheroidal satellites observed with the Hubble Space Telescope. We detect 870 RR Lyrae (RRL) stars in the fields of And I (29…
The Fornax Deep Survey (FDS) with the VST: III. Low Surface Brightness (LSB) dwarfs and Ultra Diffuse Galaxies (UDGs) in the center of the Fornax cluster
A. Venhola, R. Peletier, E. Laurikainen +16
Studies of low surface brightness (LSB) galaxies in nearby clusters have revealed a sub-population of extremely diffuse galaxies with central surface brightness > 24 mag…