Zobrazeno 1 - 10
of 302
pro vyhledávání: '"Hansen, Camilla P."'
Autor:
Puls, Arthur Alencastro, Kuske, Jan, Hansen, Camilla Juul, Lombardo, Linda, Visentin, Giorgio, Arcones, Almudena, de Melo, Raphaela Fernandes, Reichert, Moritz, Bonifacio, Piercarlo, Caffau, Elisabetta, Fritzsche, Stephan
The third r-process peak (Os, Ir, Pt) is poorly understood due to observational challenges, with spectral lines located in the blue or near-ultraviolet region of stellar spectra. These challenges need to be overcome for a better understanding of the
Externí odkaz:
http://arxiv.org/abs/2412.00195
Autor:
de Melo, Raphaela Fernandes, Lombardo, Linda, Puls, Arthur Alencastro, Romano, Donatella, Hansen, Camilla Juul, Tsiatsiou, Sophie, Meynet, Georges
Context. Carbon, nitrogen, and oxygen are the most abundant elements throughout the universe, after hydrogen and helium. Studying these elements in low-metallicity stars can provide crucial information on the chemical composition in the early Galaxy
Externí odkaz:
http://arxiv.org/abs/2411.04180
Autor:
Medina, Gustavo E., Muñoz, Ricardo R., Carlin, Jeffrey L., Vivas, A. Katherina, Grebel, Eva K., Martínez-Vázquez, Clara E., Hansen, Camilla J.
In order to constrain the evolutionary history of the Milky Way, we hunt for faint RR Lyrae stars (RRLs) using Dark Energy Camera data from the High cadence Transient Survey (HiTS) and the Halo Outskirts With Variable Stars (HOWVAST) survey. We repor
Externí odkaz:
http://arxiv.org/abs/2402.14055
Autor:
Medina, Gustavo E., Hansen, Camilla J., Muñoz, Ricardo R., Grebel, Eva K., Vivas, A. Katherina, Carlin, Jeffrey L., Martínez-Vázquez, Clara E.
Publikováno v:
2023, MNRAS, 519, 5689
We report the spectroscopic analysis of 20 halo ab-type RR Lyrae stars with heliocentric distances between 15 and 165 kpc, conducted using medium-resolution spectra from the Magellan Inamori Kyocera Echelle (MIKE) spectrograph. We obtain the systemic
Externí odkaz:
http://arxiv.org/abs/2309.03271
Autor:
Evans, Chris, Cristiani, Stefano, Opitom, Cyrielle, Cescutti, Gabriele, D'Odorico, Valentina, Alcalá, Juan Manuel, Alencar, Silvia H. P., Balashev, Sergei, Barbuy, Beatriz, Bastian, Nate, Battino, Umberto, Cambianica, Pamela, Carini, Roberta, Carter, Brad, Cassisi, Santi, Castilho, Bruno Vaz, Christlieb, Norbert, Cooke, Ryan, Covino, Stefano, Cremonese, Gabriele, Cunha, Katia, da Silva, André R., D'Elia, Valerio, De Cia, Annalisa, De Silva, Gayandhi, Diaz, Marcos, Di Marcantonio, Paolo, Ernandes, Heitor, Fitzsimmons, Alan, Franchini, Mariagrazia, Gänsicke, Boris T., Genoni, Matteo, Giribaldi, Riano E., Grazian, Andrea, Hansen, Camilla Juul, La Forgia, Fiorangela, Lazzarin, Monica, Marcolino, Wagner, Marconi, Marcella, Migliorini, Alessandra, Noterdaeme, Pasquier, Pereira, Claudio, Pilecki, Bogumil, Quirrenbach, Andreas, Randich, Sofia, Rossi, Silvia, Smiljanic, Rodolfo, Snodgrass, Colin, Stürmer, Julian, Trost, Andrea, Vanzella, Eros, Ventura, Paolo, Wright, Duncan, Zafar, Tayyaba
We introduce the scientific motivations for the development of the Cassegrain U-Band Efficient Spectrograph (CUBES) that is now in construction for the Very Large Telescope. The assembled cases span a broad range of contemporary topics across Solar S
Externí odkaz:
http://arxiv.org/abs/2208.01677
Autor:
Lombardo, Linda, Bonifacio, Piercarlo, François, Patrick, Hansen, Camilla J, Caffau, Elisabetta, Hanke, Michael, Skúladóttir, {Á}sa, Arcones, Almudena, Eichler, Marius, Reichert, Moritz, Psaltis, Athanasios, Hansen, Andreas J Koch, Sbordone, Luca
Publikováno v:
Astronomy and Astrophysics - A&A, EDP Sciences
Aims. The Chemical Evolution of R-process Elements in Stars (CERES) project aims to provide a homogeneous analysis of a sample of metal-poor stars ([Fe/H]<-1.5). We present the stellar parameters and the chemical abundances of elements up to Zr for a
Externí odkaz:
http://arxiv.org/abs/2206.13836
Autor:
Hansen, Camilla Juul
How are the heavy elements formed? This has been a key open question in physics for decades. Recent direct detections of neutron star mergers and observations of evolved stars show signatures of chemical elements in the blue range of their spectra th
Externí odkaz:
http://arxiv.org/abs/2203.07396
Autor:
Lim, Dongwook, Koch-Hansen, Andreas J., Hansen, Camilla Juul, Lépine, Sebastien, Marshall, Jennifer L., Wilkinson, Mark I., Peñarrubia, Jorge
Publikováno v:
A&A 655, A26 (2021)
Recently, an increasing number of wide binaries has been discovered. Their chemical and dynamical properties are studied through extensive surveys and pointed observations. However, the formation of these wide binaries is far from clear, although sev
Externí odkaz:
http://arxiv.org/abs/2108.08850
Autor:
Molero, Marta, Romano, Donatella, Reichert, Moritz, Matteucci, Francesca, Arcones, Almudena, Cescutti, Gabriele, Simonetti, Paolo, Hansen, Camilla Juul, Lanfranchi, Gustavo A.
We study the evolution of Eu and Ba abundances in local group dwarf spheroidal and ultra faint dwarf galaxies by means of detailed chemical evolution models and compare our results with new sets of homogeneous abundances. The adopted models include g
Externí odkaz:
http://arxiv.org/abs/2105.06916
Publikováno v:
A&A 653, A2 (2021)
Our Milky Way (MW) has witnessed a series of major accretion events. One of the later additions, Gaia-Enceladus, has contributed a considerable mass to the inner Galaxy, but also generously donated to the outer halo. So far, associations with present
Externí odkaz:
http://arxiv.org/abs/2104.11243