90 citations · 612 across the 14 of their papers we have counts for
5 papers · 1 filter
Are ring galaxies the ancestors of giant low surface brightness galaxies?
M. Mapelli, B. Moore, E. Ripamonti +3
We simulate the collisional formation of a ring galaxy and we integrate its evolution up to 1.5 Gyr after the interaction. About 100-200 Myr after the collision, the simulated gala…
Intermediate-mass black holes and ultraluminous X-ray sources in the Cartwheel ring galaxy
M. Mapelli, B. Moore, L. Giordano +4
Chandra and XMM-Newton observations of the Cartwheel galaxy show ~17 bright X-ray sources (>~5x10^38 erg s^-1), all within the gas-rich outer ring. We explore the hypothesis that t…
Blue straggler stars in dwarf spheroidal galaxies
M. Mapelli, E. Ripamonti, E. Tolstoy +3
Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point…
Constraining DM through 21 cm observations
M. Valdes, A. Ferrara, M. Mapelli +1
Beyond reionization epoch cosmic hydrogen is neutral and can be directly observed through its 21 cm line signal. If dark matter (DM) decays or annihilates the corresponding energy…
The role of HD cooling in primordial star formation
E. Ripamonti
The role of HD cooling in the formation of primordial objects is examined by means of a great number of 1-D models of the collapse of halos, exploring a wide range of masses and vi…