4 papers · 1 filter
The cosmic saga of 3He
Daniele Galli
We recall the emergence of the ``3He problem'', its currently accepted solution, and we summarize the presently available constraints on models of stellar nucleosynthesis and studi…
Symmetries, magnetic fields, and the shape of molecular cloud cores
Daniele Galli
We develop a formalism wherein the solution of the equations of equilibrium for a self-gravitating, magnetized interstellar cloud may be accomplished analytically, under the only h…
Measurements of 12C/13C ratio in planetary nebulae: implications on stellar and Galactic chemical evolution
F. Palla, R. Bachiller, L. Stanghellini +2
We present the results of a study aimed at determining the 12C/13C ratio in two samples of planetary nebulae (PNe) by means of millimeter wave observations of 12CO and 13CO. The fi…
Galactic chemical evolution of Ba-peak elements
C. Travaglio, D. Galli, R. Gallino +3
The chemical evolution of the Galaxy is followed for the elements affected by neutron capture, in particular for those in the atomic number range 56 to 63 (Ba, La, Ce, Pr, Nd, Sm a…