Zobrazeno 1 - 10
of 625
pro vyhledávání: '"Bergemann, M"'
Autor:
Storm, N., Barklem, P. S., Yakovleva, S. A., Belyaev, A. K., Palmeri, P., Quinet, P., Lodders, K., Bergemann, M., Hoppe, R.
Context. Abundances of s- and r-process elements in Sun-like stars constrain nucleosynthesis in extreme astrophysical events, such as compact binary mergers and explosions of highly magnetised rapidly rotating massive stars. Aims. We measure solar ab
Externí odkaz:
http://arxiv.org/abs/2401.13450
Recently Lian et al. (2023), thanks to Gaia-ESO data, studied the chemical evolution of neutron-capture elements in the regime [Fe/H]>-1. We aim here to complement this study down to [Fe/H]=-3, and focus on Ba, Y, Sr, and abundance ratios of [Ba/Y] a
Externí odkaz:
http://arxiv.org/abs/2311.05459
Spectroscopic analysis of hot, massive stars in large spectroscopic surveys with de-idealised models
Upcoming large-scale spectroscopic surveys with e.g. WEAVE and 4MOST will provide thousands of spectra of massive stars, which need to be analysed in an efficient and homogeneous way. Usually, studies of massive stars are limited to samples of a few
Externí odkaz:
http://arxiv.org/abs/2309.06474
Autor:
da Silva, R., D'Orazi, V., Palla, M., Bono, G., Braga, V. F., Fabrizio, M., Lemasle, B., Spitoni, E., Matteucci, F., Jonsson, H., Kovtyukh, V., Magrini, L., Bergemann, M., Dall'Ora, M., Ferraro, I., Fiorentino, G., Francois, P., Iannicola, G., Inno, L., Kudritzki, R. -P., Matsunaga, N., Monelli, M., Nonino, M., Sneden, C., Storm, J., Thevenin, F., Tsujimoto, T., Zocchi, A.
Publikováno v:
A&A 678, A195 (2023)
Classical Cepheids (CCs) are solid distance indicators and tracers of young stellar populations. Our aim is to provide iron, oxygen, and sulfur abundances for the largest and most homogeneous sample of Galactic CCs ever analyzed. The current sample c
Externí odkaz:
http://arxiv.org/abs/2308.01928
Autor:
Guiglion, G., Nepal, S., Chiappini, C., Khoperskov, S., Traven, G., Queiroz, A. B. A., Steinmetz, M., Valentini, M., Fournier, Y., Vallenari, A., Youakim, K., Bergemann, M., Mészáros, S., Lucatello, S., Sordo, R., Fabbro, S., Minchev, I., Tautvaišienė, G., Mikolaitis, Š., Montalbán, J.
In June 2022, Gaia DR3 has provided the astronomy community with about one million spectra from the Radial Velocity Spectrometer (RVS) covering the CaII triplet region. However, one-third of the published spectra have 15
Externí odkaz:
http://arxiv.org/abs/2306.05086
Autor:
Hourihane, A., Francois, P., Worley, C. C., Magrini, L., Gonneau, A., Casey, A. R., Gilmore, G., Randich, S., Sacco, G. G., Recio-Blanco, A., Korn, A. J., Prieto, C. Allende, Smiljanic, R., Blomme, R., Bragaglia, A., Walton, N. A., Van Eck, S., Bensby, T., Lanzafame, A, Frasca, A., Franciosini, E., Damiani, F., Lind, K., Bergemann, M., Bonifacio, P., Hill, V., Lobel, A., Montes, D., Feuillet, D. K., Tautvaisene, G., Guiglion, G., Tabernero, H. M., Hernandez, J. I. Gonzalez, Gebran, M., Van der Swaelmen, M., Mikolaitis, Daflon, S., Merle, T., Morel, T., Lewis, J. R., Solares, E. A. Gonzalez, Murphy, D. N. A., Jeffries, R. D., Jackson, R. J., Feltzing, S., Prusti, T., Carraro, G., Biazzo, K., Prisinzano, L., Jofre, P., Zaggia, S., Drazdauskas, A., Stonkute, E., Marfil, E., Jimenez-Esteban, F., Mahy, L., Albarran, M. L. Gutierrez, Berlanas, S. R., Santos, W., Morbidelli, L., Spina, L., Minkeviciute, R.
Publikováno v:
A&A 676, A129 (2023)
The Gaia-ESO Survey is a public spectroscopic survey that has targeted $\gtrsim10^5$ stars covering all major components of the Milky Way from the end of 2011 to 2018, delivering its public final release in May 2022. Unlike other spectroscopic survey
Externí odkaz:
http://arxiv.org/abs/2304.07720
Publikováno v:
A&A 672, L6 (2023)
Solar oxygen abundance measurements based on the O I near-infrared triplet have been a much-debated subject for several decades since non-local thermodynamic equilibrium (NLTE) calculations with 3D radiation-hydrodynamics model atmospheres introduced
Externí odkaz:
http://arxiv.org/abs/2304.01048
Autor:
Berlanas, S. R., Apellániz, J. Maíz, Herrero, A., Mahy, L., Blomme, R., Negueruela, I., Dorda, R., Comerón, F., Gosset, E., González, M. Pantaleoni, Lera, J. A. Molina, Sota, A., Furst, T., Alfaro, E. J., Bergemann, M., Carraro, G., Drew, J. E., Morbidelli, L., Vink, J. S.
Publikováno v:
A&A 671, A20 (2023)
The Gaia-ESO survey sample of massive OB stars in the Carina Nebula consists of 234 stars. The addition of brighter sources from the Galactic O-Star Spectroscopic Survey and additional sources from the literature allows us to create the most complete
Externí odkaz:
http://arxiv.org/abs/2301.08310
Publikováno v:
A&A 670, A25 (2023)
An analysis of the CH molecule in non-local thermodynamic equilibrium (NLTE) is performed for the physical conditions of cool stellar atmospheres typical of red giants (log g = 2.0, Teff = 4500 K) and the Sun. The aim of the present work is to explor
Externí odkaz:
http://arxiv.org/abs/2212.06517
Autor:
Magrini, L., Vazquez, C. Viscasillas, Spina, L., Randich, S., Romano, D., Franciosini, E., Recio-Blanco, A., Nordlander, T., D'Orazi, V., Baratella, M., Smiljanic, R., Dantas, M. L. L., Pasquini, L., Spitoni, E., Casali, G., Van der Swaelmen, M., Bensby, T., Stonkute, E., Sacco, S. Feltzing. G. G., Bragaglia, A., Pancino, E., Heiter, U., Biazzo, K., Gilmore, G., Bergemann, M., Tautvaivsiene, G., Worley, C., Hourihane, A., Gonneau, A., Morbidelli, L.
Publikováno v:
A&A 669, A119 (2023)
The spatial distribution of elemental abundances and their time evolution are among the major constraints to disentangle the scenarios of formation and evolution of the Galaxy. We used the sample of open clusters available in the final release of the
Externí odkaz:
http://arxiv.org/abs/2210.15525