Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Ernandes, H."'
The Gaia-Sausage-Enceladus merger was a major event in the history of the Milky Way. Studies on Milky Way satellite dwarf galaxies show that key elemental abundance patterns, which probe different nucleosynthetic channels, reflect the host galaxy's s
Externí odkaz:
http://arxiv.org/abs/2405.13641
Autor:
da Silva, Patrícia, Barbuy, B., Ernandes, H., Souza, S. O., Fernández-Trincado, J. G., González-Díaz, D.
Context: The abundances of the $\alpha$-elements are key for understanding the early chemical enrichment of the Galactic bulge. The elements of interest present lines in different wavelength regions, and some of them show lines only in part of the sp
Externí odkaz:
http://arxiv.org/abs/2405.06153
We revisit the abundances of neutron-capture elements in the metal-poor ([Fe/H]=-2.9) r-process-rich halo star CS 31082-001. Partly motivated by the development of the new near-ultraviolet Cassegrain U-band Efficient Spectrograph for the Very Large T
Externí odkaz:
http://arxiv.org/abs/2306.17627
Autor:
Covino, S., Cristiani, S., Alcala', J. M., Alencar, S. H. P., Balashev, S. A., Barbuy, B., Bastian, N., Battino, U., Bissell, L., Bristow, P., Calcines, A., Calderone, G., Cambianica, P., Carini, R., Carter, B., Cassisi, S., Castilho, B. V., Cescutti, G., Christlieb, N., Cirami, R., Conzelmann, R., Coretti, I., Cooke, R., Cremonese, G., Cunha, K., Cupani, G., da Silva, A. R., D'Auria, D., De Caprio, V., De Cia, A., Dekker, H., D'Elia, V., De Silva, G., Diaz, M., Di Marcantonio, P., D'Odorico, V., Ernandes, H., Evans, C., Fitzsimmons, A., Franchini, M., Gaensicke, B., Genoni, M., Giribaldi, R. E., Gneiding, C., Grazian, A., Hansen, C. J., Hopgood, J., Kosmalski, J., La Forgia, F., La Penna, P., Landoni, M., Lazzarin, M., Lunney, D., Maciel, W., Marcolino, W., Marconi, M., Migliorini, A., Miller, C., Modigliani, A., Noterdaeme, P., Oggioni, L., Opitom, C., Pariani, G., Pilecki, B., Piranomonte, S., Quirrenbach, A., Redaelli, E. M. A., Pereira, C. B., Randich, S., Rossi, S., Sanchez-Janssen, R., Schoeller, M., Seifert, W., Smiljanic, R., Snodgrass, C., Squalli, O., Stilz, I., Stuermer, J., Trost, A., Vanzella, E., Ventura, P., Verducci, O., Waring, C., Watson, S., Wells, M., Wright, D., Zafar, T., Zanutta, A., Zins, G.
In spite of the advent of extremely large telescopes in the UV/optical/NIR range, the current generation of 8-10m facilities is likely to remain competitive at ground-UV wavelengths for the foreseeable future. The Cassegrain U-Band Efficient Spectrog
Externí odkaz:
http://arxiv.org/abs/2212.12791
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:
Cristiani, S., Alcalá, J. M., Alencar, S. H. P., Balashev, S. A., Bastian, N., Barbuy, B., Battino, U., Calcines, A., Calderone, G., Cambianica, P., Carini, R., Carter, B., Cassisi, S., Castilho, B. V., Cescutti, G., Christlieb, N., Cirami, R., Coretti, I., Cooke, R., Covino, S., Cremonese, G., Cunha, K., Cupani, G., da Silva, A. R., De Caprio, V., De Cia, A., Dekker, H., D'Elia, V., De Silva, G., Diaz, M., Di Marcantonio, P., D'Auria, D., D'Odorico, V., Fitzsimmons, A., Ernandes, H., Evans, C., Franchini, M., Genoni, M., Gänsicke, B., Giribaldi, R. E., Gneiding, C., Grazian, A., Hansen, C. J., La Forgia, F., Landoni, M., Lazzarin, M., Lunney, D., Maciel, W., Marcolino, W., Marconi, M., Migliorini, A., Miller, C., Noterdaeme, P., Opitom, C., Pariani, G., Pilecki, B., Piranomonte, S., Quirrenbach, A., Redaelli, E. M. A., Pereira, C. B., Randich, S., Rossi, S., Sanchez-Janssen, R., Seifert, W., Smiljanic, R., Snodgrass, C., Stilz, I., Stürmer, J., Vanzella, E., Ventura, P., Verducci, O., Waring, C., Watson, S., Wells, M., Wright, D., Zafar, T., Zanutta, A.
In the era of Extremely Large Telescopes, the current generation of 8-10m facilities are likely to remain competitive at ground-UV wavelengths for the foreseeable future. The Cassegrain U-Band Efficient Spectrograph (CUBES) has been designed to provi
Externí odkaz:
http://arxiv.org/abs/2208.01672
We investigate the feasibility of robust abundances for selected neutron-capture elements (Ge, Bi, Hf, U) from near-UV spectroscopy with the CUBES instrument now in development for the Very Large Telescope. We use the CUBES end-to-end simulator to sy
Externí odkaz:
http://arxiv.org/abs/2203.15693
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:
Barbuy, B., Ernandes, H., Souza, S. O., Razera, R., Moura, T., Meléndez, J., Pérez-Villegas, A., Zoccali, M., Minniti, D., Dias, B., Ortolani, S., Bica, E.
The globular cluster AL~3 is old and located in the inner bulge. Three individual stars were observed with the Phoenix spectrograph at the Gemini South telescope. The wavelength region contains prominent lines of CN, OH, and CO, allowing the derivati
Externí odkaz:
http://arxiv.org/abs/2102.12674
Autor:
Ernandes, H., Evans, C. J., Barbuy, B., Castilho, B., Cescutti, G., Christlieb, N., Cristiani, S., Cupani, G., Di Marcantonio, P., Franchini, M., Hansen, C., Quirrenbach, A., Smiljanic, R.
Publikováno v:
Proceedings of the SPIE, Volume 11447, id. 1144760 11 pp. (2020)
Alongside future observations with the new European Extremely Large Telescope (ELT), optimised instruments on the 8-10m generation of telescopes will still be competitive at 'ground UV' wavelengths (3000-4000 A). The near UV provides a wealth of uniq
Externí odkaz:
http://arxiv.org/abs/2102.02205