Could very low-metallicity stars with rotation-dominated orbits have been shepherded by the bar?

Autor: Yuan, Zhen, Li, Chengdong, Martin, Nicolas F., Monari, Giacomo, Famaey, Benoit, Siebert, Arnaud, Ardern-Arentsen, Anke, Sestito, Federico, Thomas, Guillaume F., Hill, Vanessa, Ibata, Rodrigo A., Kordopatis, Georges, Starkenburg, Else, Viswanathan, Akshara

Publikováno v: A&A 691, L1 (2024)

The most metal-poor stars (e.g. [Fe/H] $\leq-2.5$) are the ancient fossils from the early assembly epoch of our Galaxy, very likely before the formation of the thick disc. Recent studies have shown that a non-negligible fraction of them have prograde

Externí odkaz: http://arxiv.org/abs/2311.08464

The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation

Autor: Jin, Shoko, Trager, Scott C., Dalton, Gavin B., Aguerri, J. Alfonso L., Drew, J. E., Falcón-Barroso, Jesús, Gänsicke, Boris T., Hill, Vanessa, Iovino, Angela, Pieri, Matthew M., Poggianti, Bianca M., Smith, D. J. B., Vallenari, Antonella, Abrams, Don Carlos, Aguado, David S., Antoja, Teresa, Aragón-Salamanca, Alfonso, Ascasibar, Yago, Babusiaux, Carine, Balcells, Marc, Barrena, R., Battaglia, Giuseppina, Belokurov, Vasily, Bensby, Thomas, Bonifacio, Piercarlo, Bragaglia, Angela, Carrasco, Esperanza, Carrera, Ricardo, Cornwell, Daniel J., Domínguez-Palmero, Lilian, Duncan, Kenneth J., Famaey, Benoit, Fariña, Cecilia, Gonzalez, Oscar A., Guest, Steve, Hatch, Nina A., Hess, Kelley M., Hoskin, Matthew J., Irwin, Mike, Knapen, Johan H., Koposov, Sergey E., Kuchner, Ulrike, Laigle, Clotilde, Lewis, Jim, Longhetti, Marcella, Lucatello, Sara, Méndez-Abreu, Jairo, Mercurio, Amata, Molaeinezhad, Alireza, Monguió, Maria, Morrison, Sean, Murphy, David N. A., de Arriba, Luis Peralta, Pérez, Isabel, Pérez-Ràfols, Ignasi, Picó, Sergio, Raddi, Roberto, Romero-Gómez, Mercè, Royer, Frédéric, Siebert, Arnaud, Seabroke, George M., Som, Debopam, Terrett, David, Thomas, Guillaume, Wesson, Roger, Worley, C. Clare, Alfaro, Emilio J., Prieto, Carlos Allende, Alonso-Santiago, Javier, Amos, Nicholas J., Ashley, Richard P., Balaguer-Núñez, Lola, Balbinot, Eduardo, Bellazzini, Michele, Benn, Chris R., Berlanas, Sara R., Bernard, Edouard J., Best, Philip, Bettoni, Daniela, Bianco, Andrea, Bishop, Georgia, Blomqvist, Michael, Boeche, Corrado, Bolzonella, Micol, Bonoli, Silvia, Bosma, Albert, Britavskiy, Nikolay, Busarello, Gianni, Caffau, Elisabetta, Cantat-Gaudin, Tristan, Castro-Ginard, Alfred, Couto, Guilherme, Carbajo-Hijarrubia, Juan, Carter, David, Casamiquela, Laia, Conrado, Ana M., Corcho-Caballero, Pablo, Costantin, Luca, Deason, Alis, de Burgos, Abel, De Grandi, Sabrina, Di Matteo, Paola, Domínguez-Gómez, Jesús, Dorda, Ricardo, Drake, Alyssa, Dutta, Rajeshwari, Erkal, Denis, Feltzing, Sofia, Ferré-Mateu, Anna, Feuillet, Diane, Figueras, Francesca, Fossat, Matteo, Franciosin, Elena, Frasca, Antonio, Fumagalli, Michele, Gallazzi, Anna, García-Benito, Rubén, Fusillo, Nicola Gentile, Gebran, Marwan, Gilbert, James, Gledhill, T. M., Delgado, Rosa M. González, Greimel, Robert, Guarcello, Mario Giuseppe, Guerra, Jose, Gullieuszik, Marco, Haines, Christopher P., Hardcastle, Martin J., Harris, Amy, Haywood, Misha, Helmi, Amina, Hernandez, Nauzet, Herrero, Artemio, Hughes, Sarah, Irsic, Vid, Jablonka, Pascale, Jarvis, Matt J., Jordi, Carme, Kondapally, Rohit, Kordopatis, Georges, Krogager, Jens-Kristian, La Barbera, Francesco, Lam, Man I, Larsen, Søren S., Lemasle, Bertrand, Lewis, Ian J., Lhomé, Emilie, Lind, Karin, Lodi, Marcello, Longobardi, Alessia, Lonoce, Ilaria, Magrin, Laura, Apellániz, Jesús Maíz, Marchal, Olivier, Marco, Amparo, Martin, Nicolas F., Matsuno, Tadafumi, Maurogordato, Sophie, Merluzzi, Paola, Miralda-Escudé, Jordi, Molinari, Emilio, Monari, Giacomo, Morelli, Lorenzo, Mottram, Christopher J., Naylor, Tim, Negueruela, Ignacio, Oñorbe, Jose, Pancino, Elena, Peirani, Sébastien, Peletier, Reynier F., Pozzetti, Lucia, Rainer, Monica, Ramos, Pau, Read, Shaun C., Rossi, Elena Maria, Röttgering, Huub J. A., Rubiño-Martín, Jose Alberto, Montes, Jose Sabater, Juan, José San, Sanna, Nicoletta, Schallig, Ellen, Schiavon, Ricardo P., Schultheis, Mathias, Serra, Paolo, Shimwell, Timothy W., Simón-Díaz, Sergio, Smith, Russell J., Sordo, Rosanna, Sorini, Daniele, Soubiran, Caroline, Starkenburg, Else, Steele, Iain A., Stott, John, Stuik, Remko, Tolstoy, Eline, Tortora, Crescenzo, Tsantaki, Maria, Van der Swaelmen, Mathieu, van Weeren, Reinout J., Vergani, Daniela, Verheijen, Marc A. W., Verro, Kristiina, Vink, Jorick S., Vioque, Miguel, Walcher, C. Jakob, Walton, Nicholas A., Wegg, Christopher, Weijmans, Anne-Marie, Williams, Wendy L., Wilson, Andrew J., Wright, Nicholas J., Xylakis-Dornbusch, Theodora, Youakim, Kris, Zibetti, Stefano, Zurita, Cristina

WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, will see first light in late 2022. WEAVE comprises a new 2-degree field-of-view prime-focus corrector system, a nearly 1000-multiplex f

Externí odkaz: http://arxiv.org/abs/2212.03981

Faint objects in motion: the new frontier of high precision astrometry

Autor: Malbet, Fabien, Boehm, Céline, Krone-Martins, Alberto, Amorim, Antonio, Anglada-Escudé, Guillem, Brandeker, Alexis, Courbin, Frédéric, Enßlin, Torsten, Falcão, Antonio, Freese, Katherine, Holl, Berry, Labadie, Lucas, Léger, Alain, Mamon, Gary, Mcarthur, Barbara, Mora, Alcione, Shao, Mike, Sozzetti, Alessandro, Spolyar, Douglas, Villaver, Eva, Abbas, Ummi, Albertus, Conrado, Alves, João, Barnes, Rory, Bonomo, Aldo Stefano, Bouy, Hervé, Brown, Warren, Cardoso, Vitor, Castellani, Marco, Chemin, Laurent, Clark, Hamish, Correia, Alexandre, Crosta, Mariateresa, Crouzier, Antoine, Damasso, Mario, Darling, Jeremy, Davies, Melvyn, Diaferio, Antonaldo, Fortin, Morgane, Fridlund, Malcolm, Gai, Mario, Garcia, Paulo, Gnedin, Oleg, Goobar, Ariel, Gordo, Paulo, Goullioud, Renaud, Hall, David, Hambly, Nigel, Harrison, Diana, Hobbs, David, Holland, Andrew, Høg, Erik, Jordi, Carme, Klioner, Sergei, Lançon, Ariane, Laskar, Jacques, Lattanzi, Mario, Poncin-Lafitte, Christophe Le, Luri, Xavier, Michalik, Daniel, de Almeida, André Moitinho, Mourão, Ana, Moustakas, Leonidas, Murray, Neil, Muterspaugh, Matthew, Oertel, Micaela, Ostorero, Luisa, Portell, Jordi, Prost, Jean-Pierre, Quirrenbach, Andreas, Schneider, Jean, Scott, Pat, Siebert, Arnaud, Da Silva, Antonio, Silva, Manuel, Thébault, Philippe, Tomsick, John, Traub, Wesley, de Val-Borro, Miguel, Valluri, Monica, Walton, Nicholas, Watkins, Laura, White, Glenn, Wyrzykowski, Lukasz, Wyse, Rosemary, Yamada, Yoshiyuki

Publikováno v: Experimental Astronomy, Springer Link, 2021, 51 (3), pp.845-886

Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint objects, a flexibly-pointed instrument capable of high astrometric accur

Externí odkaz: http://arxiv.org/abs/2111.08709

A panoramic landscape of the Sagittarius stream in Gaia DR2 revealed with the STREAMFINDER spyglass

Autor: Ibata, Rodrigo, Bellazzini, Michele, Thomas, Guillaume, Malhan, Khyati, Martin, Nicolas, Famaey, Benoit, Siebert, Arnaud

We present the first full six-dimensional panoramic portrait of the Sagittarius stream, obtained by searching for wide stellar streams in the Gaia DR2 dataset with the STREAMFINDER algorithm. We use the kinematic behavior of the sample to devise a se

Externí odkaz: http://arxiv.org/abs/2002.11121