Examinando por Autor "Lanza, A.F."

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    Catalog for the ESPRESSO blind radial velocity exoplanet survey
    (Astronomy and Astrophysics, 2019) Hojjatpanah, S.; Figueira, P.; Santos, N.C.; Adibekyan, V.; Sousa, S.G.; Delgado-Mena, E.; Alibert, Y.; Cristiani, S.; González Hernández, J.I.; Lanza, A.F.; Di Marcantonio, P.; Martins, J.H.C.
    Aims. One of the main scientific drivers for ESPRESSO, Échelle SPectrograph, is the detection and characterization of Earth-class exoplanets. With this goal in mind, the ESPRESSO guaranteed time observations (GTO) Catalog identifies the best target stars for a blind search for the radial velocity (RV) signals caused by Earth-class exoplanets. Methods. Using the most complete stellar catalogs available, we screened for the most suitable G, K, and M dwarf stars for the detection of Earth-class exoplanets with ESPRESSO. For most of the stars, we then gathered high-resolution spectra from new observations or from archival data. We used these spectra to spectroscopically investigate the existence of any stellar binaries, both bound or background stars. We derived the activity level using chromospheric activity indexes using log (R0HK), as well as the projected rotational velocity v sin i. For the cases where planet companions are already known, we also looked at the possibility that additional planets may exist in the host's habitable zone using dynamical arguments. Results. We estimated the spectroscopic contamination level, v sin i, activity, stellar parameters and chemical abundances for 249 of the most promising targets. Using these data, we selected 45 stars that match our criteria for detectability of a planet like Earth. The stars presented and discussed in this paper constitute the ESPRESSO GTO catalog for the RV blind search for Earth-class planets. They can also be used for any other work requiring a detailed spectroscopic characterization of stars in the solar neighborhood.
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    Gaia Focused Product Release: Radial velocity time series of long-period variables
    (EDP Sciences, 2023-12) Trabucchi, M.; Mowlavi, N.; Lebzelter, T.; Lecoeur-Taibi, I.; Audard, M.; Eyer, L.; García-Lario, P.; Gavras, P.; Holl, B.; Jevardat De Fombelle, G.; Nienartowicz, K.; Rimoldini, L.; Sartoretti, P.; Blomme, R.; Frémat, Y.; Marchal, O.; Damerdji, Y.; Brown A.G.A.; Guerrier, A.; Panuzzo, P.; Katz, D.; Seabroke, G.M.; Benson, K.; Haigron, R.; Smith, M.; Lobel, A.; Vallenari, A.; Prusti, T.; De Bruijne, J.H.J.; Arenou, F.; Babusiaux, C.; Barbier, A.; Biermann, M.; Creevey, O.L.; Ducourant, C.; Evans, D.W.; Guerra, R.; Hutton, A.; Jordi, C.; Klioner, S.A.; Lammers, U.; Lindegren, L.; Luri, X.; Mignard, F.; Randich, S.; Smiljanic, R.; Tanga, P.; Walton, N.A.; Bailer-Jones, C.A.L.; Bastian, U.; Cropper, M.; Drimmel, R.; Lattanzi, M.G.; Soubiran, C.; Van Leeuwen, F.; Bakker, J.; Castañeda, J.; De Angeli, F.; Fabricius, C.; Fouesneau, M.; Galluccio, L.; Masana, E.; Messineo, R.; Nicolas, C.; Pailler, F.; Riclet, F.; Roux, W.; Sordo, R.; Thévenin, F.; Gracia-Abril G.; Portell, J.; Teyssier, D.; Altmann, M.; Berthier, J; Burgess, P.W.; Busonero, D.; Busso, G.; Cánovas, H.; Carry, B.; Cheek, N.; Clementini, G.; Davidson, M.; De Teodoro, P.; Delchambre, L.; Dell'oro, A.; Fraile Garcia, E.; Garabato, D.; Garralda Torres, N.; Hambly, N.C.; Harrison, D.L.; Hatzidimitriou, D.; Hernández, J.; Hodgkin, S.T.; Jamal, S.; Jordan, S.; Krone-Martins, A.; Lanzafame, A.C.; Löffler, W.; Lorca, A.; Marrese, P.M.; Moitinho, A.; Muinonen, K.; Nuñez Campos, M.; Oreshina-Slezak, I.; Osborne, P.; Pancino, E.; Pauwels, T.; Recio-Blanco, A.; Riello, M.; Robin, A.C.; Roegiers, T.; Sarro, L.M.; Schultheis, M.; Siopis, C.; Siopis, C.; Sozzetti, A.; Utrilla, E.; Van Leeuwen, M.; Weingrill, K.; Abbas, U.; Ábrahám, P.; Abreu Aramburu, A.; Aerts , C.; Altavilla, G.; Álvarez, M.A.; Alves, J.; Anders, F.; Anderson, R.I.; Antoja, T.; Baines, D.; Baker, S.G.; Balog, Z.; Barache, C; Barbato, D.; Barros, M.; Barstow, M.A.; Bartolomé, S.; Bashi, D.; Bauchet, N.; Baudeau, N.; Becciani, U.; Bedin, L.R.; Bellas-Velidis, I.; Bellazzini, M.; Beordo, W.; Berihuete, A.; Bernet, M.; Bertolotto, C.; Bertone, S.; Bianchi, L.; Binnenfeld, A.; Blazere, A.; Boch, T.; Bombrun, A.; Bouquillon, S.; Bragaglia, A.; Braine, J.; Bramante, L.; Breedt, E.; Bressan, A.; Brouillet, N.; Brugaletta, E.; Bucciarelli, B.; Butkevich, A.G.; Buzzi, R.; Caffau, E.; Cancelliere, R.; Cannizzo, S.; Carballo, R.; Carlucci, T.; Carnerero, M.I.; Carrasco, J.M.; Carretero, J.; Carton, S.; Casamiquela, L.; Castellani, M.; Castro-Ginard, A.; Cesare, V.; Charlot, P.; Chemin, L.; Chiaramida, V.; Chiavassa, A.; Chornay, N.; Collins, R.; Contursi, G.; Cooper, W.J.; Cornez, T.; Crosta, M.; Crowley, C.; Dafonte, C.; David, M.; De Laverny, P.; De Luise, F.; De March, R.; De Ridder, J.; De Souza, R.; De Torres A.; Del Peloso, E.F.; Delbo, M.; Delgado, A.; Dharmawardena, T.E.; Diakite, S.; Diener, C.; Distefano, E.; Dolding, C.; Dsilva, K.; Durán, J.; Enke, H.; Esquej, P.; Fabre, C.; Fabrizio, M.; Faigler, S.; Fatović, M.; Fedorets, G.; Fernández-Hernández, J.; Fernique, P.; Figueras, F.; Fournier, Y.; Fouron, C.; Gai, M.; Galinier, M.; Garcia-Gutierrez, A.; García-Torres, M.; Garofalo, A.; Gerlach, E.; Geyer, R.; Giacobbe, P.; Gilmore, G.; Girona, S.; Giuffrida, G.; Gomel, R.; Gomez, A.; González-Núñez, J.; González-Santamaría, I.; Gosset, E.; Granvik, M.; Gregori Barrera, V.; Gutiérrez-Sánchez, R.; Haywood, M.; Helmer, A.; Helmi, A.; Henares, K.; Hidalgo, S.L.; Hilger, T.; Hobbs, D.; Hottier, C.; Huckle, H.E.; Jabłońska, M.; Jansen, F.; Jiménez-Arranz, Ó.; Juaristi Campillo, J.; Khanna, S.; Kordopatis, G.; Kóspál, Á.; Kostrzewa-Rutkowska, Z.; Kun, M.; Lambert, S.; Lanza, A.F.; Le Campion, J.-F.; Lebreton, Y.; Leccia, S.; Lecoutre, G.; Liao, S.; Liberato, L.; Licata, E.; Lindstrøm, H.E.P.; Lister, T.A.; Livanou, E.; Loup, C.; Mahy, L.; Mann, R.G.; Manteiga, M.; Marchant, J.M.; Marconi, M.; Marín Pina, D.; Marinoni, S.; Marshall, D.J.; Martín Lozano. J.; Martín-Fleitas, J.M.; Marton, G.; Mary, N.; Masip, A.; Massari, D.; Mastrobuono-Battisti, A.; Mazeh, T.; McMillan, P.J.; Meichsner, J.; Messina, S.; Michalik , D.; Millar, N.R.; Mints, A.; Molina, D.; Molinaro, R.; Molnár, L.; Monari, G.; Monguió, M.; Montegriffo, P.; Montero, A.; Mor, R.; Mora, A.; Morbidelli, R.; Morel, T.; Morris, D.; Munoz, D.; Muraveva, T.; Murphy, C.P.; Musella, I.; Nagy, Z.; Nieto, S.; Noval, L.; Ogden, A.; Ordenovic, C.; Pagani, C.; Pagano, I.; Palaversa, L.; Palicio, P.A.; Pallas-Quintela, L.; Panahi, A.; Panem, C.; Payne-Wardenaar, S.; Pegoraro, L.; Penttilä, A.; Pesciullesi, P.; Piersimoni, A.M.; Pinamonti, M.; Pineau, F.-X.; Plachy, E.; Plum, G.; Poggio, E.; Pourbaix, D.; Prša, A.; Pulone, L.; Racero, E.; Rainer, M.; Raiteri, C.M.; Ramos, P.; Ramos-Lerate, M.; Ratajczak, M.; Re Fiorentin, P.; Regibo, S.; Reylé, C.; Ripepi, V.; Riva, A.; Rix H.-W.; Rixon, G.; Robichon, N.; Robin, C.; Romero-Gómez, M.; Rowell, N.; Royer, F.; Ruz Mieres, D.; Rybicki, K.A.; Sadowski, G.; Sáez Núñez, A.; Sagristà Sellés, A.; Sahlmann, J.; Sanchez Gimenez, V.; Sanna, N.; Santoveña, R.; Sarasso, M.; Sarrate Riera, C.; Sciacca, E.; Segovia, J.C.; Ségransan, D.; Shahaf, S.; Siebert, A.; Siltala, L.; Slezak, E.; Smart, R.L.; Snaith, O.N.; Solano, E.; Solitro, F.; Souami, D.; Souchay, J.; Spina, L.; Spitoni, E.; Spoto, F.; Squillante, L.A.; Steele, I.A.; Steidelmüller, H.; Surdej, J.; Szabados, L.; Taris, F.; Taylor, M.B.; Teixeira, R.; Tisanić, K.; Tolomei, L.; Torra, F.; Torralba, Elipe G.; Tsantaki, M.; Ulla, A.; Unger, N.; Vanel, O.; Vecchiato, A.; Vicente, D.; Voutsinas, S.; Weiler, M.; Wyrzykowski, Ł.; Zhao, H.; Zorec, J.; Zwitter, T.; Balaguer-Nunez, L.; Leclerc, N.; Morgenthaler, S.; Robert, G.; Zucker, S.
    Context. The third Gaia Data Release (DR3) provided photometric time series of more than 2 million long-period variable (LPV) candidates. Anticipating the publication of full radial-velocity data planned with Data Release 4, this Focused Product Release (FPR) provides radial-velocity time series for a selection of LPV candidates with high-quality observations. Aims. We describe the production and content of the Gaia catalog of LPV radial-velocity time series, and the methods used to compute the variability parameters published as part of the Gaia FPR. Methods. Starting from the DR3 catalog of LPV candidates, we applied several filters to construct a sample of sources with high-quality radial-velocity measurements. We modeled their radial-velocity and photometric time series to derive their periods and amplitudes, and further refined the sample by requiring compatibility between the radial-velocity period and at least one of the G, GBP, or GRP photometric periods. Results. The catalog includes radial-velocity time series and variability parameters for 9614 sources in the magnitude range 6 ≲ G/mag ≲ 14, including a flagged top-quality subsample of 6093 stars whose radial-velocity periods are fully compatible with the values derived from the G, GBP, and GRP photometric time series. The radial-velocity time series contain a mean of 24 measurements per source taken unevenly over a duration of about three years. We identify the great majority of the sources (88%) as genuine LPV candidates, with about half of them showing a pulsation period and the other half displaying a long secondary period. The remaining 12% of the catalog consists of candidate ellipsoidal binaries. Quality checks against radial velocities available in the literature show excellent agreement. We provide some illustrative examples and cautionary remarks. Conclusions. The publication of radial-velocity time series for almost ten thousand LPV candidates constitutes, by far, the largest such database available to date in the literature. The availability of simultaneous photometric measurements gives a unique added value to the Gaia catalog. © The Authors 2023.