We study the M-type asymptotic giant branch (AGB) population of the Large Magellanic Cloud (LMC) by characterizing the individual sources in terms of the main properties of the progenitors and of the dust present in the circumstellar envelope. To this aim we compare the combination of the spectroscopic and photometric data collected by Spitzer

Los asteroides son objetos resultantes de las colisiones y evolución dinámica de los planetesimales originarios del Sistema Solar. Algunos de estos planetesimales originarios —formados en el disco protoplanetario como consecuencia de la agregación de gas y polvo— sobrevivieron al proceso de formación planetaria y permanecen prácticamente

Los asteroides son objetos resultantes de las colisiones y evolución dinámica de los planetesimales originarios del Sistema Solar. Algunos de estos planetesimales originarios —formados en el disco protoplanetario como consecuencia de la agregación de gas y polvo— sobrevivieron al proceso de formación planetaria y permanecen prácticamente

Only about 19 Galactic and 25 extragalactic bonafide luminous blue variables (LBVs) are known to date. This incomplete census prevents our understanding of this crucial phase of massive star evolution which leads to the formation of heavy binary black holes via the classical channel. With large samples of LBVs one could better determine the

Short-timescale microlensing events are likely to be produced by substellar brown dwarfs (BDs), but it is difficult to securely identify BD lenses based on only event timescales t E because short-timescale events can also be produced by stellar lenses with high relative lens-source proper motions. In this paper, we report three strong candidate BD

The scatter in the galaxy size versus stellar mass (M ⋆) relation gets largely reduced when, rather than the half-mass radius R e, the size at a fixed surface density is used. Here, we address why this happens. We show how a reduction is to be expected because any two galaxies with the same M ⋆ have at least one radius with identical surface