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12 papers · 2 filters
Galactic chemical abundance evolution in the solar neighborhood up to the Iron peak
Andreu Alibes, Javier Labay, Ramon Canal
We have developed a detailed standard chemical evolution model to study the evolution of all the chemical elements up to the iron peak in the solar vicinity. We consider that the G…
Presolar Grains from Novae
S. Amari, X. Gao, L. N. Nittler +4
We report the discovery of five SiC grains and one graphite grain isolated from the Murchison carbonaceous meteorite whose major-element isotopic compositions indicate an origin in…
Evidence for an inflationary phase transition from the LSS and CMB anisotropy data
J. Barriga, E. Gaztanaga, M. G. Santos +1
In the light of the recent Boomerang and Maxima observations of the CMB which show an anomalously low second acoustic peak, we reexamine the prediction by Adams et al (1997) that t…
On the APM power spectrum and the CMB anisotropy: Evidence for a phase transition during inflation?
Jose Barriga, Enrique Gaztanaga, Mario Santos +1
Adams et al. (1997b) have noted that according to our current understanding of the unification of fundamental interactions, there should have been phase transitions associated with…
Identification of the companion stars of Type Ia supernovae
R. Canal, J. Mendez, P. Ruiz-Lapuente
The nature of the binary systems giving rise to Type Ia supernovae (SNeIa) remains an unsolved problem. In this {\it Letter} we calculate, from the statistics of initial conditions…
Morphological and kinematic signatures of a binary central star in the planetary nebula Hu 2-1
Luis F. Miranda, Jose M. Torrelles, Martin A. Guerrero +2
We present narrow-band optical images, VLA-A 3.6 cm continuum and H92alpha emission line data and high resolution long-slit [N II] spectra of Hu 2-1. The formation of Hu 2-1 appear…