Eventos

Nitrogen is one of the most abundant metals in the ISM and
thus emitting strong emission-lines in the optical spectrum of ionized
gaseous nebulae. Its nucleosynthetic origin is quite different to
that of oxygen as it is produced both by massive stars and by

The Wide Field Camera 3 (WFC3) was installed in 2009 and is now the primary science
instrument on HST. Under development since 1998, WFC3 expanded Hubble's ultraviolet and
infrared imaging capabilities by factors of more than 20. WFC3 also provides an unparalleled capability

We briefly review the main steps that led to the discovery
of oxygen in the Universe and to the understanding of
its  production and cosmic evolution. We highlight some
of the problems that still need an explanation.

En esta plática se presentan modelos teóricos de los eventos
eruptivos de 1840 (la gran erupción) y de 1890 (la
menor erupción) de la estrella masiva Eta Car. Las
nebulosas bipolares en torno a la estrella se formaron de la

I will present a review of maser emission in evolved stars from the
asymptotic giant branch (AGB) to planetary nebulae (PNe). The
circumstellar envelopes of oxygen-rich evolved stars provide optimal
conditions to pump different species of masers, emitting at radio

Dwarf spheroidal galaxies are key objects in the current
cosmological paradigm: first, they are the least luminous galaxies, likely
signaling the minimum halo mass at which gas can be accreted and converted