Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Friaca, A."'
Autor:
Barbuy, B., Friaça, A. C. S., Ernandes, H., da Silva, P., Souza, S. O., Fernández-Trincado, J. G., Cunha, K., Smith, V. V., Masseron, T., Pérez-Villegas, A., Chiappini, C., Queiroz, A. B. A., Santiago, B. X., Beers, T. C., Anders, F., Schiavon, R. P., Valentini, M., Minniti, D., Geisler, D., Souto, D., Placco, V. M., Zoccali, M., Feltzing, S., Schultheis, M., Nitschelm, C.
Stars presently identified in the bulge spheroid are probably very old, and their abundances can be interpreted as due to the fast chemical enrichment of the early Galactic bulge. The abundances of the iron-peak elements are important tracers of nucl
Externí odkaz:
http://arxiv.org/abs/2410.13751
Publikováno v:
Revista Sodebras, 2023
This work presents the results of a theoretical study that analyzed the possibility of nucleobases to form in the interstellar medium, in the Horsehead nebula, which is a region considered an archetype of molecular cloud. Performing the Meudon PDR co
Externí odkaz:
http://arxiv.org/abs/2303.03963
Three-dimensional hydrodynamic simulations are commonly used to study the evolution of the gaseous content in isolated galaxies, besides its connection with galactic star formation histories. Stellar winds, supernova blasts, and black hole feedback a
Externí odkaz:
http://arxiv.org/abs/2302.04825
Autor:
Souza, Stefano O., Ernandes, Heitor, Valentini, Marica, Barbuy, Beatriz, Chiappini, Cristina, Pérez-Villegas, Angeles, Ortolani, Sergio, Friaça, Amâncio C. S., Queiroz, Anna B. A., Bica, Eduardo
Publikováno v:
A&A 671, A45 (2023)
The information on Galactic assembly time is imprinted on the chemodynamics of globular clusters. This makes them important probes that help us to understand the formation and evolution of the Milky Way. Discerning between in-situ and ex-situ origin
Externí odkaz:
http://arxiv.org/abs/2301.05227
Autor:
Razera, R., Barbuy, B., Moura, T. C., Ernandes, H., Pérez-Villegas, A., Souza, S. O., Chiappini, C., Queiroz, A. B. A., Anders, F., Fernández-Trincado, J. G., Friaça, A. C. S., Cunha, K., Smith, V. V., Santiago, B. X., Schiavon, R. P., Valentini, M., Minniti, D., Schultheis, M., Geisler, D., Sobeck, J., Placco, V. M, Zoccali, M.
The central part of the Galaxy host a multitude of stellar populations, including the spheroidal bulge stars, stars moved to the bulge through secular evolution of the bar, inner halo, inner thick disk, inner thin disk, as well as debris from past ac
Externí odkaz:
http://arxiv.org/abs/2208.06634
Autor:
Ernandes, H., Barbuy, B., Friaça, A., Hill, V., Spite, 2 M., Spite, F., Castilho, B. V., Evans, C. J.
The 'First Stars' programme revealed the metal-poor halo star CS 31082-001 to be r-process and actinide rich, including the first measurement of a uranium abundance for an old star. To better characterise and understand such rare objects, we present
Externí odkaz:
http://arxiv.org/abs/2202.04450
Autor:
Canelo, Carla M., Sales, Dinalva A., Friaça, Amâncio C. S., Pastoriza, Miriani, Menéndez-Delmestre, Karín
Polycyclic aromatic hydrocarbons (PAHs) are of great astrochemical and astrobiological interest due to their potential to form prebiotic molecules. We analyse the 7.7 and 8.6 ${\mu}$m PAH bands in 126 predominantly starburst-dominated galaxies extrac
Externí odkaz:
http://arxiv.org/abs/2109.01641
Publikováno v:
Revista Sodebras, 2021, Vol. 16, 185
This article presents the results of a study concerning interstellar molecules which are useful for the bookkeeping of the organic content of the universe and for providing a glimpse into prebiotic conditions on Earth and in other environments in the
Externí odkaz:
http://arxiv.org/abs/2106.04666
Autor:
Canelo, Carla M., Bronfman, Leonardo, Mendoza, Edgar, Duronea, Nicolas, Merello, Manuel, Carvajal, Miguel, Friaça, Amâncio C. S., Lepine, Jacques
Isocyanic acid (HNCO) is a simple molecule with a potential to form prebiotic and complex organic species. Using a spectral survey collected with the Atacama Pathfinder EXperiment (APEX), in this work we report the detection of 42 transitions of HNCO
Externí odkaz:
http://arxiv.org/abs/2104.10605
Since the epoch of cosmic star formation peak at $z \sim 2$, most of it is obscured in high mass galaxies, while in low mass galaxies the radiation escapes unobstructed. During the reionization epoch, the presence of evolved, dust obscured galaxies a
Externí odkaz:
http://arxiv.org/abs/2008.12798