Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Duffau, S."'
Autor:
Minniti, J. H., Zoccali, M., Rojas-Arriagada, A., Minniti, D., Sbordone, L., Ramos, R. Contreras, Braga, V. F., Catelan, M., Duffau, S., Gieren, W., Marconi, M., Valcarce, A. A. R.
Publikováno v:
A&A 654, A138 (2021)
In an effort to improve our understanding of the spiral arm structure of the Milky Way, we use Classical Cepheids (CCs) to increase the number of young tracers on the far side of the Galactic disk with accurately determined distances. We use a sample
Externí odkaz:
http://arxiv.org/abs/2107.03464
Autor:
Minniti, J. H., Sbordone, L., Rojas-Arriagada, A., Zoccali, M., Ramos, R. Contreras, Minniti, D., Marconi, M., Braga, V. F., Catelan, M., Duffau, S., Gieren, W., Valcarce, A. A. R.
Publikováno v:
A&A 640, A92 (2020)
The structure, kinematics, and chemical composition of the far side of the Milky Way disk, beyond the bulge, are still to be revealed. Classical Cepheids (CCs) are young and luminous standard candles. We aim to use a well-characterized sample of thes
Externí odkaz:
http://arxiv.org/abs/2007.03122
Autor:
Caffau, E., Bonifacio, P., Oliva, E., Korotin, S., Capitanio, L., Andrievsky, S., Collet, R., Sbordone, L., Duffau, S., Sanna, N., Origlia, L., Ryde, N., Ludwig, H. -G.
Publikováno v:
A&A 622, A68 (2019)
Detailed chemical abundances of Galactic stars are needed in order to improve our knowledge of the formation and evolution of our galaxy, the Milky Way. We took advantage of the GIANO archive spectra to select a sample of Galactic disc stars in order
Externí odkaz:
http://arxiv.org/abs/1812.05100
Autor:
Magrini, L., Spina, L., Randich, S., Friel, E., Kordopatis, G., Worley, C., Pancino, E., Bragaglia, A., Donati, P., Tautvaivsiene, G., Bagdonas, V., Delgado-Mena, E., Adibekyan, V., Sousa, S. G., Jimenez-Esteban, F. M., Sanna, N., Roccatagliata, V., Bonito, R., Sbordone, L., Duffau, S., Gilmore, G., Feltzing, S., Jeffries, R. D., Vallenari, A., Alfaro, E. J., Bensby, T., Francois, P., Koposov, S., Korn, A. J., Recio-Blanco, A., Smiljanic, R., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Damiani, F., Franciosini, E., Frasca, A., Hourihane, A., Jofre, P., de Laverny, P., Lewis, J., Masseron, T., Monaco, L., Morbidelli, L., Prisinzano, L., Sacco, G., Zaggia, S.
Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations, giving important constraints to stellar and Galactic evolution. We aim to trace the abundance patterns and
Externí odkaz:
http://arxiv.org/abs/1806.03068
Autor:
Caffau, E., Gallagher, A. J., Bonifacio, P., Spite, M., Duffau, S., Spite, F., Monaco, L., Sbordone, L.
Publikováno v:
A&A 614, A68 (2018)
Carbon-enhanced metal-poor (CEMP) stars represent a sizeable fraction of all known metal-poor stars in the Galaxy. Their formation and composition remains a significant topic of investigation within the stellar astrophysics community. We analysed a s
Externí odkaz:
http://arxiv.org/abs/1803.09252
Autor:
Jethwa, P., Torrealba, G., Navarrete, C., Carballo-Bello, J. A., de Boer, T., Erkal, D., Koposov, S. E., Duffau, S., Geisler, D., Catelan, M., Belokurov, V.
We report the discovery of a thin stellar stream - which we name the Jet stream - crossing the constellations of Hydra and Pyxis. The discovery was made in data from the SLAMS survey, which comprises deep $g$ and $r$ imaging for a $650$ square degree
Externí odkaz:
http://arxiv.org/abs/1711.09103
Autor:
Duffau, S., Caffau, E., Sbordone, L., Bonifacio, P., Andrievsky, S., Korotin, S., Babusiaux, C., Salvadori, S., Monaco, L., Francois, P., Skuladottir, A., Bragaglia, A., Donati, P., Spina, L., Gallagher, A. J., Ludwig, H. -G., Christlieb, N., Hansen, C. J., Mott, A., Steffen, M., Zaggia, S., Blanco-Cuaresma, S., Calura, F., Friel, E., Jimenez-Esteban, F. M., Koch, A., Magrini, L., Pancino, E., Tang, B., Tautvaisiene, G., Vallenari, A., Hawkins, K., Gilmore, G., Randich, S., Feltzing, S., Bensby, T., Flaccomio, E., Smiljanic, R., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Damiani, F., Franciosini, E., Hourihane, A., Jofre, P., Lardo, C., Lewis, J., Morbidelli, L., Sousa, S. G., Worley, C. C.
Publikováno v:
A&A 604, A128 (2017)
Due to their volatile nature, when sulfur and zinc are observed in external galaxies, their determined abundances represent the gas-phase abundances in the interstellar medium. This implies that they can be used as tracers of the chemical enrichment
Externí odkaz:
http://arxiv.org/abs/1704.02981
Autor:
Magrini, L., Randich, S., Kordopatis, G., Prantzos, N., Romano, D., Chieffi, A., Limongi, M., Francois, P., Pancino, E., Friel, E., Bragaglia, A., Tautvaisiene, G., Spina, L., Overbeek, J., Cantat-Gaudin, T., Donati, P., Vallenari, A., Sordo, R., Jimenez-Esteban, F. M., Tang, B., Drazdauskas, A., Sousa, S., Duffau, S., Jofre, P., Gilmore, G., Feltzing, S., Alfaro, E., Bensby, T., Flaccomio, E., Koposov, S., Lanzafame, A., Smiljanic, R., Bayo, A., Carraro, G., Casey, A. R., Costado, M. T., Damiani, F., Franciosini, E., Hourihane, A., Lardo, C., Lewis, J., Monaco, L., Morbidelli, L., Sacco, G., Sbordone, L., Worley, C. C., Zaggia, S.
Publikováno v:
A&A 603, A2 (2017)
The spatial distribution of elemental abundances in the disc of our Galaxy gives insights both on its assembly process and subsequent evolution, and on the stellar nucleogenesis of the different elements. Gradients can be traced using several types o
Externí odkaz:
http://arxiv.org/abs/1703.00762
Autor:
Duffau, S., Vivas, A. K., Navarrete, C., Catelan, M., Hajdu, G., Torrealba, G., Cortes, C., Belokurov, V., Koposov, S., Drake, A. J.
We present an update of a spectroscopic follow-up survey at low-resolution of a large number of RR Lyrae halo overdensity candidates found in the southern sky. The substructure candidates were identified in the RR Lyrae catalog of Torrealba et al. (2
Externí odkaz:
http://arxiv.org/abs/1607.01416
Autor:
Duffau, S., Sbordone, L., Vivas, A. K., Hansen, C. J., Zoccali, M., Catelan, M., Minniti, D., Grebel, E. K.
We present the first detailed chemical abundances for distant RR Lyrae stars members of the Virgo Stellar Stream (VSS), derived from X-Shooter medium-resolution spectra. Sixteen elements from carbon to barium have been measured in six VSS RR Lyrae st
Externí odkaz:
http://arxiv.org/abs/1603.07191