Yamilet Rodríguez-Lazcano
Spanish National Research Council
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Featured researches published by Yamilet Rodríguez-Lazcano.
Proceedings of the National Academy of Sciences of the United States of America | 2013
Rafael Escribano; Guillermo M. Muñoz Caro; G. A. Cruz-Diaz; Yamilet Rodríguez-Lazcano; Belén Maté
Carbon dioxide (CO2) is one of the most relevant and abundant species in astrophysical and atmospheric media. In particular, CO2 ice is present in several solar system bodies, as well as in interstellar and circumstellar ice mantles. The amount of CO2 in ice mantles and the presence of pure CO2 ice are significant indicators of the temperature history of dust in protostars. It is therefore important to know if CO2 is mixed with other molecules in the ice matrix or segregated and whether it is present in an amorphous or crystalline form. We apply a multidisciplinary approach involving IR spectroscopy in the laboratory, theoretical modeling of solid structures, and comparison with astronomical observations. We generate an unprecedented highly amorphous CO2 ice and study its crystallization both by thermal annealing and by slow accumulation of monolayers from the gas phase under an ultrahigh vacuum. Structural changes are followed by IR spectroscopy. We also devise theoretical models to reproduce different CO2 ice structures. We detect a preferential in-plane orientation of some vibrational modes of crystalline CO2. We identify the IR features of amorphous CO2 ice, and, in particular, we provide a theoretical explanation for a band at 2,328 cm−1 that dominates the spectrum of the amorphous phase and disappears when the crystallization is complete. Our results allow us to rule out the presence of pure and amorphous CO2 ice in space based on the observations available so far, supporting our current view of the evolution of CO2 ice.
Journal of Physical Chemistry A | 2013
Miguel Ángel Moreno; Belén Maté; Yamilet Rodríguez-Lazcano; Óscar Gálvez; Pedro C. Gómez; Víctor J. Herrero; Rafael T. Escribano
Cyanate and bicarbonate are two ions that play active roles in many fields of physics and chemistry, including biological sciences and astrochemistry. We present here a comprehensive study of these species covering a range of phases and methodologies. We have performed theoretical calculations on the isolated ions and their hydrates with one to four water molecules, and in clusters with 15 water molecules. The predicted infrared spectra are compared with observed spectra from experiments where liquid droplets of their solutions are frozen at 14 K on a substrate, to mimic some astrophysical conditions. Crystals of cyanate and bicarbonate sodium and potassium salts are also studied experimental and theoretically. As well, the spontaneous decomposition of cyanate into bicarbonate is documented from the spectra of an aged solution. Finally, the possible astrophysical observation of bicarbonate in water-containing particles is discussed.
Physical Chemistry Chemical Physics | 2011
Belén Maté; Yamilet Rodríguez-Lazcano; Óscar Gálvez; Isabel Tanarro; Rafael Escribano
The Astrophysical Journal | 2013
Alexandre Zanchet; Yamilet Rodríguez-Lazcano; Óscar Gálvez; Víctor J. Herrero; Rafael Escribano; Belén Maté
Physical Chemistry Chemical Physics | 2012
Belén Maté; Yamilet Rodríguez-Lazcano; Víctor J. Herrero
Journal of Quantitative Spectroscopy & Radiative Transfer | 2012
Yamilet Rodríguez-Lazcano; Belén Maté; Óscar Gálvez; Víctor J. Herrero; Isabel Tanarro; Rafael Escribano
Physical Chemistry Chemical Physics | 2014
Yamilet Rodríguez-Lazcano; Belén Maté; Víctor J. Herrero; Rafael Escribano; Óscar Gálvez
The Astrophysical Journal | 2012
Belén Maté; Víctor J. Herrero; Yamilet Rodríguez-Lazcano; Delia Fernández-Torre; Miguel Ángel Moreno; Pedro C. Gómez; Rafael Escribano
Archive | 2016
Esther Carrasco; Maite Cueto; José Luis Doménech; Rafael Escribano; Delia Fernández-Torre; Óscar Gálvez; Víctor J. Herrero; Miguel Jiménez-Redondo; Belén Maté; Beatriz Martín-Llorente; Miguel Ángel Moreno; Ismael K. Ortega; Yamilet Rodríguez-Lazcano; Isabel Tanarro
Archive | 2014
Belén Maté; Víctor J. Herrero; Miguel Jiménez-Redondo; Isabel Tanarro; Yamilet Rodríguez-Lazcano; Óscar Gálvez; Rafael Escribano