Article
Astronomy & Astrophysics
G. Cescutti, C. Morossi, M. Franchini, P. Di Marcantonio, C. Chiappini, M. Steffen, M. Valentini, P. Francois, N. Christlieb, C. Cortes, C. Kobayashi, E. Depagne
Summary: Researchers analyzed the barium lines in two halo stars, HD 6268 and HD 4306, finding that the former showed an s-process composition while the latter displayed an r-process isotopic pattern. This confirms the theoretical expectation that both r-process events and s-process contribution by rotating massive stars have affected the ancient halo of our Galaxy.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Umberto Battino, Claudia Lederer-Woods, Marco Pignatari, Benjamin Soos, Maria Lugaro, Diego Vescovi, Sergio Cristallo, Philip J. Woods, Amanda Karakas
Summary: This study re-evaluates the production of Al-26 and its impact on stellar nucleosynthesis. The new reactivities have a significant effect on both low- and high-mass stars.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
L. Cavallo, G. Cescutti, F. Matteucci
Summary: In this paper, the authors investigate the origin of the large star-to-star variation in the [Eu/Fe] ratios in extremely metal-poor stars. By considering the chemical enrichment of Eu in the building blocks of the Galactic halo, they find that the dynamics of binary systems in the gravitational potential of the host galaxy play a role in the enrichment from neutron star mergers.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Jordan Schofield, Marco Pignatari, Richard J. Stancliffe, Peter Hoppe
Summary: In this study, isotopic abundances of C, N, Al, Si, and Ti measured in presolar grains were compared with predictions from 21 CCSN models. The research found that high energy models favor the formation of a C/Si zone enriched in C-12, Si-28, and Ti-44.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
E. Monpribat, S. Martinet, S. Courtin, M. Heine, S. Ekstrom, D. G. Jenkins, A. Choplin, P. Adsley, D. Curien, M. Moukaddam, J. Nippert, S. Tsiatsiou, G. Meynet
Summary: This study provides new numerical tables for C-12 + C-12 reaction rates and associated uncertainty estimations, along with analytical formulae that can be directly implemented into stellar evolution codes. The impact of these new rates on C-burning in stars was investigated, showing differences in central temperatures and burning lifetimes.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Collin L. Kielty, Kim A. Venn, Federico Sestito, Else Starkenburg, Nicolas F. Martin, David S. Aguado, Anke Arentsen, Sebastien Fabbro, Jonay I. Gonzalez Hernandez, Vanessa Hill, Pascale Jablonka, Carmela Lardo, Lyudmila Mashonkina, Julio F. Navarro, Chris Sneden, Guillaume F. Thomas, Kris Youakim, Spencer Bialek, Ruben Sanchez-Janssen
Summary: High-resolution optical spectra of 30 metal-poor stars from the Pristine survey were analyzed using the GRACES spectrograph at the Gemini Observatory. The study revealed that most of these stars exhibit chemical compositions similar to other extremely metal-poor stars in the Galactic halo, but also show some unusual chemical features, providing insights into the formation and early chemical evolution of the Galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Federico Sestito, Daria Zaremba, Kim A. Venn, Lina D'Aoust, Christian Hayes, Jaclyn Jensen, Julio F. Navarro, Pascale Jablonka, Emma Fernandez-Alvar, Jennifer Glover, Alan W. Mcconnachie, Andre-Nicolas Chene
Summary: Stellar candidates in the extreme outskirts of the Ursa Minor dwarf galaxy have been discovered and confirmed to be part of the galaxy through observations and chemical analysis. The chemical patterns in UMi suggest an outside-in star-formation history and a low star-formation efficiency. Additionally, the analysis of the surface number density profile indicates that UMi's outskirts have been influenced by tidal effects.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
F. Rizzuti, G. Cescutti, F. Matteucci, A. Chieffi, R. Hirschi, M. Limongi, A. Saro
Summary: Studies have shown the importance of considering different production sites and the rotation of massive stars in explaining the chemical evolution of Sr and Ba in the Galaxy. New methods of model-data comparison have been developed to constrain the rotation parameters of massive stars and successfully reproduce the chemical evolution of these elements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Erin R. Higgins, Jorick S. Vink, Raphael Hirschi, Alison M. Laird, Gautham N. Sabhahit
Summary: The most massive stars play a crucial role in providing recycled material for young clusters and galaxies. These stars lose a disproportionately large amount of mass from the beginning of their core H-burning. They also release a significant amount of H-processed elements on the main sequence, which may have implications for observed anticorrelations. The primary source of Al-26 is found to be VMS with enhanced winds, contradicting previous theories.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
O. Clarkson, F. Herwig
Summary: The study reveals significant impacts of H-He interactions on the evolution and nucleosynthesis of the first massive stars, potentially violating traditional 1D stellar evolution modeling assumptions. By investigating 26 stellar evolution simulations, it is found that H-He interactions result in different types of responses in stellar evolution depending on the evolutionary phase.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. Deal, C. J. A. P. Martins
Summary: The success of primordial nucleosynthesis has been limited by the long-standing lithium problem. A self-consistent perturbative analysis is used to explore the problem and its possible solutions in the context of the latest observations and theoretical modeling. The research concludes that the lithium problem most likely has an astrophysical solution, while the Deuterium discrepancy provides a possible indication of new physics.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. P. Roriz, M. Lugaro, C. B. Pereira, N. A. Drake, S. Junqueira, C. Sneden
Summary: Barium (Ba) stars show atmospheric signs of the slow neutron-capture mechanism from asymptotic giant branch (AGB) stars, with rubidium (Rb) playing a key role in the s-process diagnostic. The study of 180 Ba stars reveals that Rb abundances are consistent with s-process models from low-mass AGB stars, indicating the main neutron source is the C-13(alpha,n)O-16 reaction in the companions of these Ba stars. Former IR/OH massive AGB star companions were not found in this study.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. P. Roriz, M. Lugaro, C. B. Pereira, C. Sneden, S. Junqueira, A. Karakas, N. A. Drake
Summary: A new study presents elemental abundances for neutron-capture elements in 180 barium giant stars, revealing discrepancies in La abundances compared to previous literature. The data set shows an overabundance of neutron-capture elements in these stars, but behaves similarly to field stars in some aspects. While model predictions match observations in certain ratios, discrepancies are found in other ratios, requiring further investigation into neutron capture models.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Giulia C. Cinquegrana, Amanda Karakas
Summary: As metallicity increases, the mixing efficiency on the TP-AGB decreases significantly, leading to much of the nucleosynthesis being locked inside white dwarf remnants for very metal-rich stars. Additionally, temperatures at the base of the convective envelope decrease with increasing metallicity, resulting in only partial hydrogen burning for intermediate-mass models. Minor production of heavy elements via the s-process peak at strontium is found in the study, which decreases sharply with increasing metallicity. The dominance of proton capture nucleosynthesis in the models is reflected in the yields, weighted towards the lower mass regime to match the mass distribution within a galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
L. Mashonkina, Yu Pakhomov, T. Sitnova, P. Jablonka, S. A. Yakovleva, A. K. Belyaev
Summary: This study presents accurate atmospheric parameters and NLTE abundances for very metal-poor stars in the Sextans dwarf spheroidal galaxy. The stars exhibit alpha-enhancements and a tight relationship between Ba and Mg, suggesting a common origin in massive stars. Additionally, the study reveals a decline in alpha/Fe for stars with higher [Fe/H] values and a distinctive Ba enrichment pattern in one C-enhanced star.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Carlos Viscasillas Vazquez, L. Magrini, G. Casali, G. Tautvaisiene, L. Spina, M. van der Swaelmen, S. Randich, T. Bensby, A. Bragaglia, E. Friel, S. Feltzing, G. G. Sacco, A. Turchi, F. Jimenez-Esteban, V. D'Orazi, E. Delgado-Mena, S. Mikolaitis, A. Drazdauskas, R. Minkeviciute, E. Stonkute, V. Bagdonas, D. Montes, G. Guiglion, M. Baratella, H. M. Tabernero, G. Gilmore, E. Alfaro, P. Francois, A. Korn, R. Smiljanic, M. Bergemann, E. Franciosini, A. Gonneau, A. Hourihane, C. C. Worley, S. Zaggia
Summary: The past decade has seen significant advancements in understanding the Galaxy, with the help of space missions and spectroscopic surveys. Mapping the ages of stellar populations is crucial to completing our picture of the Galaxy. This study aims to analyze the relation between stellar ages and abundance ratios in different regions of the Galactic disc, using data from the Gaia-ESO survey and open clusters. The results show that there is no universal age-chemical clock relationship in the disc, indicating a dependence on galactocentric position and metallicity.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
G. Tautvaisiene, A. Drazdauskas, A. Bragaglia, S. L. Martell, E. Pancino, C. Lardo, S. Mikolaitis, R. Minkeviciute, E. Stonkute, M. Ambrosch, V. Bagdonas, Y. Chorniy, N. Sanna, E. Franciosini, R. Smiljanic, S. Randich, G. Gilmore, T. Bensby, M. Bergemann, A. Gonneau, G. Guiglion, G. Carraro, U. Heiter, A. Korn, L. Magrini, L. Morbidelli, S. Zaggia
Summary: The study aimed to determine carbon, nitrogen, and oxygen abundances for evolved giants in the globular cluster NGC 1851 to investigate the coeval nature of the double populations of stars. The results showed differences in mean metallicity, C/N ratio, and s-process dominated element-to-iron abundance ratios between the two populations, suggesting that NGC 1851 is composed of two clusters with different ages.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Ian D. Roberts, Laura C. Parker, Stephen Gwyn, Michael J. Hudson, Raymond Carlberg, Alan McConnachie, Jean-Charles Cuillandre, Kenneth C. Chambers, Pierre-Alain Duc, Hisanori Furusawa, Raphael Gavazzi, Vanessa Hill, Mark E. Huber, Rodrigo Ibata, Martin Kilbinger, Simona Mei, Yannick Mellier, Satoshi Miyazaki, Masamune Oguri, Richard J. Wainscoat
Summary: Through a search across more than 50 spectroscopically selected SDSS groups and clusters, we identified 48 ram pressure candidate galaxies, which are generally low-mass galaxies with enhanced star formation rates compared to galaxies in the field. These candidates are predominantly found in groups and clusters, with the enhancement in star formation rates being independent of galaxy mass and most pronounced in clusters.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Nicolas F. Martin, Kim A. Venn, David S. Aguado, Else Starkenburg, Jonay I. Gonzalez Hernandez, Rodrigo A. Ibata, Piercarlo Bonifacio, Elisabetta Caffau, Federico Sestito, Anke Arentsen, Carlos Allende Prieto, Raymond G. Carlberg, Sebastien Fabbro, Morgan Fouesneau, Vanessa Hill, Pascale Jablonka, Georges Kordopatis, Carmela Lardo, Khyati Malhan, Lyudmila I. Mashonkina, Alan W. McConnachie, Julio F. Navarro, Ruben Sanchez-Janssen, Guillaume F. Thomas, Zhen Yuan, Alessio Mucciarelli
Summary: Stellar ejecta gradually enrich the gas, forming fossilized structures of the early Universe. However, the least chemically enriched stellar systems have not been found in globular clusters. Recent observations of a stellar stream with extremely low metallicity suggest the existence of stellar clusters with lower metallicity in the past, contributing to the Milky Way halo.
Article
Astronomy & Astrophysics
S. Randich, G. Gilmore, L. Magrini, G. G. Sacco, R. J. Jackson, R. D. Jeffries, C. C. Worley, A. Hourihane, A. Gonneau, C. Viscasillas Vazquez, E. Franciosini, J. R. Lewis, E. J. Alfaro, C. Allende Prieto, T. Bensby, R. Blomme, A. Bragaglia, E. Flaccomio, P. Francois, M. J. Irwin, S. E. Koposov, A. J. Korn, A. C. Lanzafame, E. Pancino, A. Recio-Blanco, R. Smiljanic, S. Van Eck, T. Zwitter, M. Asplund, P. Bonifacio, S. Feltzing, J. Binney, J. Drew, A. M. N. Ferguson, G. Micela, I Negueruela, T. Prusti, H-W Rix, A. Vallenari, A. Bayo, M. Bergemann, K. Biazzo, G. Carraro, A. R. Casey, F. Damiani, A. Frasca, U. Heiter, V Hill, P. Jofre, P. de Laverny, K. Lind, G. Marconi, C. Martayan, T. Masseron, L. Monaco, L. Morbidelli, L. Prisinzano, L. Sbordone, S. G. Sousa, S. Zaggia, V Adibekyan, R. Bonito, E. Caffau, S. Daflon, D. K. Feuillet, M. Gebran, J. Gonzalez Hernandez, G. Guiglion, A. Herrero, A. Lobel, J. Maiz Apellaniz, D. Montes, T. Morel, C. Soubiran, L. Spina, H. M. Tabernero, G. Traven, M. Valentini, M. Van der Swaelmen, S. Villanova, N. J. Wright, U. Abbas, V. Aguirre Borsen-Koch, J. Alves, L. Balaguer-Nunez, P. S. Barklem, D. Barrado, S. R. Berlanas, A. S. Binks, A. Bressan, R. Capuzzo-Dolcetta, L. Casagrande, L. Casamiquela, R. S. Collins, V D'Orazi, M. L. L. Dantas, V. P. Debattista, E. Delgado-Mena, P. Di Marcantonio, A. Drazdauskas, N. W. Evans, B. Famaey, M. Franchini, Y. Fremat, E. D. Friel, X. Fu, D. Geisler, O. Gerhard, E. A. Gonzalez Solares, E. K. Grebel, M. L. Gutierrez Albarran, D. Hatzidimitriou, E. Held, F. Jimenez-Esteban, H. Jonsson, C. Jordi, T. Khachaturyants, G. Kordopatis, J. Kos, N. Lagarde, L. Mahy, M. Mapelli, E. Marfil, S. L. Martell, S. Messina, A. Miglio, I Minchev, A. Moitinho, J. Montalban, M. J. P. F. G. Monteiro, C. Morossi, N. Mowlavi, A. Mucciarelli, D. N. A. Murphy, N. Nardetto, S. Ortolani, F. Paletou, J. Palous, E. Paunzen, J. C. Pickering, A. Quirrenbach, P. Re Fiorentin, J. Read, D. Romano, N. Ryde, N. Sanna, W. Santos, G. M. Seabroke, A. Spagna, M. Steinmetz, E. Stonkute, E. Sutorius, F. Thevenin, M. Tosi, M. Tsantaki, J. S. Vink, N. Wright, R. F. G. Wyse, M. Zoccali, J. Zorec, D. B. Zucker, N. A. Walton
Summary: This article provides an overview of the implementation, science results, and potential of the Gaia-ESO Public Spectroscopic Survey. The survey has successfully determined radial velocities, stellar parameters, and elemental abundances for a large sample of Galactic stars. The final catalogue of the survey, along with advanced data products, will be released in the first half of 2022.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
G. Gilmore, S. Randich, C. C. Worley, A. Hourihane, A. Gonneau, G. G. Sacco, J. R. Lewis, L. Magrini, P. Francois, R. D. Jeffries, S. E. Koposov, A. Bragaglia, E. J. Alfaro, C. Allende Prieto, R. Blomme, A. J. Korn, A. C. Lanzafame, E. Pancino, A. Recio-Blanco, R. Smiljanic, S. Van Eck, T. Zwitter, T. Bensby, E. Flaccomio, M. J. Irwin, E. Franciosini, L. Morbidelli, F. Damiani, R. Bonito, E. D. Friel, J. S. Vink, L. Prisinzano, U. Abbas, D. Hatzidimitriou, E. Held, C. Jordi, E. Paunzen, A. Spagna, R. J. Jackson, J. Maiz Apellaniz, M. Asplund, P. Bonifacio, S. Feltzing, J. Binney, J. Drew, A. M. N. Ferguson, G. Micela, I Negueruela, T. Prusti, H-W Rix, A. Vallenari, M. Bergemann, A. R. Casey, P. de Laverny, A. Frasca, V Hill, K. Lind, L. Sbordone, S. G. Sousa, V Adibekyan, E. Caffau, S. Daflon, D. K. Feuillet, M. Gebran, J. Gonzalez Hernandez, G. Guiglion, A. Herrero, A. Lobel, D. Montes, T. Morel, G. Ruchti, C. Soubiran, H. M. Tabernero, G. Tautvaisiene, G. Traven, M. Valentini, M. Van der Swaelmen, S. Villanova, C. Viscasillas Vazquez, A. Bayo, K. Biazzo, G. Carraro, B. Edvardsson, U. Heiter, P. Jofre, G. Marconi, C. Martayan, T. Masseron, L. Monaco, N. A. Walton, S. Zaggia, V. Aguirre Borsen-Koch, J. Alves, L. Balaguer-Nunez, P. S. Barklem, D. Barrado, M. Bellazzini, S. R. Berlanas, A. S. Binks, A. Bressan, R. Capuzzo-Dolcetta, L. Casagrande, L. Casamiquela, R. S. Collins, V D'Orazi, M. L. L. Dantas, V. P. Debattista, E. Delgado-Mena, P. Di Marcantonio, A. Drazdauskas, N. W. Evans, B. Famaey, M. Franchini, Y. Fremat, X. Fu, D. Geisler, O. Gerhard, E. A. Gonzalez Solares, E. K. Grebel, M. L. Gutierrez Albarran, F. Jimenez-Esteban, H. Jonsson, T. Khachaturyants, G. Kordopatis, J. Kos, N. Lagarde, H-G Ludwig, L. Mahy, M. Mapelli, E. Marfil, S. L. Martell, S. Messina, A. Miglio, I Minchev, A. Moitinho, J. Montalban, M. J. P. F. G. Monteiro, C. Morossi, N. Mowlavi, A. Mucciarelli, D. N. A. Murphy, N. Nardetto, S. Ortolani, F. Paletou, J. Palous, J. C. Pickering, A. Quirrenbach, P. Re Fiorentin, J. Read, D. Romano, N. Ryde, N. Sanna, W. Santos, G. M. Seabroke, L. Spina, M. Steinmetz, E. Stonkute, E. Sutorius, F. Thevenin, M. Tosi, M. Tsantaki, N. Wright, R. F. G. Wyse, M. Zoccali, J. Zorec, D. B. Zucker
Summary: The Gaia-ESO Public Spectroscopic Survey is an important project that aims to obtain astrophysical parameters and elemental abundances for a large sample of stars, providing valuable data for the homogenisation of other stellar surveys. The survey obtained a significant amount of spectra and the final data set will be released in the coming years.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
T. Xylakis-Dornbusch, N. Christlieb, K. Lind, T. Nordlander
Summary: This study uses flux ratios from Gaia spectra to identify metal-poor stars and infer the iron abundance within a large uncertainty range. The study discovers a relationship between iron abundance and the flux ratio of the Ca H & K region to the H beta line, which is successfully applied to noisy synthetic spectra for reliable identification of metal-poor stars. By selecting stars with lower inferred abundances, it is possible to detect a high proportion of stars with core abundances below -3.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Wako Aoki, Haining Li, Tadafumi Matsuno, Qianfan Xing, Yuqin Chen, Norbert Christlieb, Satoshi Honda, Miho N. Ishigaki, Jianrong Shi, Takuma Suda, Nozomu Tominaga, Hong-Liang Yan, Jingkun Zhao, Gang Zhao
Summary: The chemical abundances of very metal-poor stars provide constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. This study obtained high-resolution spectra for about 400 very metal-poor stars and discussed the kinematics of the sample. It also identified seven double-lined spectroscopic binaries and discussed their frequency at very low metallicity.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
G. Cescutti, P. Bonifacio, E. Caffau, L. Monaco, M. Franchini, L. Lombardo, A. M. Matas Pinto, F. Lucertini, P. Francois, E. Spitoni, R. Lallement, L. Sbordone, A. Mucciarelli, M. Spite, C. J. Hansen, P. Di Marcantonio, A. Kucinskas, V. Dobrovolskas, A. J. Korn, M. Valentini, L. Magrini, S. Cristallo, F. Matteucci
Summary: Galactic archaeology is a vibrant field of astronomy that focuses on the oldest stars in our Galaxy. However, there has been a bias in the observations, with intermediate metal-poor stars often being overlooked. This study successfully obtained high-quality spectra for a sample of intermediate metallicity stars using multiple telescopes and spectrographs, providing valuable information about their radial velocities and Galactic orbits.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
E. Franciosini, S. Randich, P. de Laverny, K. Biazzo, D. K. Feuillet, A. Frasca, K. Lind, L. Prisinzano, G. Tautvaisiene, A. C. Lanzafame, R. Smiljanic, A. Gonneau, L. Magrini, E. Pancino, G. Guiglion, G. G. Sacco, N. Sanna, G. Gilmore, P. Bonifacio, R. D. Jeffries, G. Micela, T. Prusti, E. J. Alfaro, T. Bensby, A. Bragaglia, P. Francois, A. J. Korn, S. Van Eck, A. Bayo, M. Bergemann, G. Carraro, U. Heiter, A. Hourihane, P. Jofre, J. Lewis, C. Martayan, L. Monaco, L. Morbidelli, C. C. Worley, S. Zaggia
Summary: This paper describes the methods used in the final data release of the Gaia-ESO Survey to derive lithium equivalent widths and abundances. The survey measured lithium equivalent widths for about 40,000 stars and derived abundances for about 38,000 stars. The dataset provides valuable information for understanding stellar evolution, internal mixing, and Galactic evolution.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Chris Evans, Stefano Cristiani, Cyrielle Opitom, Gabriele Cescutti, Valentina D'Odorico, Juan Manuel Alcala, Silvia H. P. Alencar, Sergei Balashev, Beatriz Barbuy, Nate Bastian, Umberto Battino, Pamela Cambianica, Roberta Carini, Brad Carter, Santi Cassisi, Bruno Vaz Castilho, Norbert Christlieb, Ryan Cooke, Stefano Covino, Gabriele Cremonese, Katia Cunha, Andre R. da Silva, Valerio D'Elia, Annalisa De Cia, Gayandhi De Silva, Marcos Diaz, Paolo Di Marcantonio, Heitor Ernandes, Alan Fitzsimmons, Mariagrazia Franchini, Boris T. Gansicke, Matteo Genoni, Riano E. Giribaldi, Andrea Grazian, Camilla Juul Hansen, Fiorangela La Forgia, Monica Lazzarin, Wagner Marcolino, Marcella Marconi, Alessandra Migliorini, Pasquier Noterdaeme, Claudio Pereira, Bogumil Pilecki, Andreas Quirrenbach, Sofia Randich, Silvia Rossi, Rodolfo Smiljanic, Colin Snodgrass, Julian Stuermer, Andrea Trost, Eros Vanzella, Paolo Ventura, Duncan Wright, Tayyaba Zafar
Summary: This paper introduces the scientific motivations for the development of the Cassegrain U-Band Efficient Spectrograph (CUBES) for the Very Large Telescope. It covers a wide range of astronomical topics where current ground-based spectrographs are limited. Each topic's background is presented, and specific technical requirements for the instrument design are identified. The CUBES design aims to greatly improve the efficiency of astronomical spectroscopy over a specific wavelength range, and its predicted performance is compared to existing facilities.
EXPERIMENTAL ASTRONOMY
(2023)
Article
Astronomy & Astrophysics
Daniela Carollo, Norbert Christlieb, Patricia B. Tissera, Emanuel Sillero
Summary: We studied the chemodynamical properties of very metal-poor (VMP) stars from the Hamburg/ESO survey matched with Gaia EDR3. By analyzing the phase space using the three integrals of motion, we found VMP stars with disk kinematics and extremely metal-poor stars. We also identified halo stars bound to the gravitational potential of the progenitor halo. Comparison with simulated galaxies suggests that VMP stars with disk kinematics can form through accretion from early satellites and in situ formation.
ASTROPHYSICAL JOURNAL
(2023)
Proceedings Paper
Instruments & Instrumentation
S. Cristiani, J. M. Alcala, S. H. P. Alencar, S. A. Balashev, N. Bastian, B. Barbuy, U. Battino, A. Calcines, G. Calderone, P. Cambianica, R. Carini, B. Carter, S. Cassisi, B. V. Castilho, G. Cescutti, N. Christlieb, R. Cirami, I. Coretti, R. Cooke, S. Covino, G. Cremonese, K. Cunha, G. Cupani, A. R. da Silva, V. De Caprio, A. De Cia, H. Dekker, V. D'Elia, G. De Silva, M. Diaz, P. Di Marcantonio, D. D'Auria, V. D'Odorico, A. Fitzsimmons, H. Ernandes, C. Evans, M. Franchini, M. Genoni, B. Gansicke, R. E. Giribaldi, C. Gneiding, A. Grazian, C. J. Hansen, F. La Forgia, M. Landoni, M. Lazzarin, D. Lunney, W. Maciel, W. Marcolino, M. Marconi, A. Migliorini, C. Miller, P. Noterdaeme, C. Opitom, G. Pariani, B. Pilecki, S. Piranomonte, A. Quirrenbach, E. M. A. Redaelli, C. B. Pereira, S. Randich, S. Rossi, R. Sanchez-Janssen, W. Seifert, R. Smiljanic, C. Snodgrass, I. Stilz, J. Stuermer, E. Vanzella, P. Ventura, O. Verducci, C. Waring, S. Watson, M. Wells, D. Wright, T. Zafar, A. Zanutta
Summary: In the era of Extremely Large Telescopes, current 8-10m facilities are expected to remain competitive in ground-UV wavelengths. The Cassegrain U-Band Efficient Spectrograph (CUBES) is designed to provide high-efficiency observations in the near UV range and offer new possibilities in various fields of astrophysics. The project has entered the detailed design and construction phase, with first science operations planned for 2028.
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IX
(2022)
