Search Results - "Casagrande, Luca"

Connecting the Local Stellar Halo and Its Dark Matter Density to Dwarf Galaxies via Blue Stragglers by Casagrande, Luca

“…The Gaia H-R diagram shows the presence of apparently young stars at high tangential velocities. Using a simple analytical model, I show that these stars are…”
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The SkyMapper-Gaia RVS view of the Gaia–Enceladus–Sausage  – an investigation of the metallicity and mass of the Milky Way’s last major merger by Feuillet, Diane K, Feltzing, Sofia, Sahlholdt, Christian L, Casagrande, Luca

“…ABSTRACT We characterize the Gaia–Enceladus–Sausage kinematic structure recently discovered in the Galactic halo using photometric metallicities from the…”
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The Chemical Homogeneity of Sun-like Stars in the Solar Neighborhood by Bedell, Megan, Bean, Jacob L., Meléndez, Jorge, Spina, Lorenzo, Ramírez, Ivan, Asplund, Martin, Alves-Brito, Alan, Santos, Leonardo dos, Dreizler, Stefan, Yong, David, Monroe, TalaWanda, Casagrande, Luca

“…The compositions of stars are a critical diagnostic tool for many topics in astronomy such as the evolution of our Galaxy, the formation of planets, and the…”
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M dwarfs: effective temperatures, radii and metallicities by Casagrande, Luca, Flynn, Chris, Bessell, Michael

“…We empirically determine effective temperatures and bolometric luminosities for a large sample of nearby M dwarfs, for which high accuracy optical and infrared…”
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On the alleged duality of the Galactic halo by Schönrich, Ralph, Asplund, Martin, Casagrande, Luca

“…We examine the kinematics of the Galactic halo based on SDSS/SEGUE data by Carollo et al. We find that their claims of a counter-rotating halo are the result…”
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Absolute Calibration. III. Improved Absolute Calibration for the Visible through the Mid-infrared by Rieke, G. H., Engelke, Charles, Su, Kate, Casagrande, Luca

“…Abstract We propose Sirius as an improved zero-point-defining star and calibrate its spectrum to an accuracy of ∼0.6% in both the visible and infrared. This…”
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The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system by Casagrande, Luca, Lin, Jane, Rains, Adam D, Liu, Fan, Buder, Sven, Horner, Jonathan, Asplund, Martin, Lewis, Geraint F, Martell, Sarah L, Nordlander, Thomas, Stello, Dennis, Ting, Yuan-Sen, Wittenmyer, Robert A, Bland-Hawthorn, Joss, Casey, Andrew R, De Silva, Gayandhi M, D’Orazi, Valentina, Freeman, Ken C, Hayden, Michael R, Kos, Janez, Lind, Karin, Schlesinger, Katharine J, Sharma, Sanjib, Simpson, Jeffrey D, Zucker, Daniel B, Zwitter, Tomaž

“…ABSTRACT In order to accurately determine stellar properties, knowledge of the effective temperature of stars is vital. We implement Gaia and 2MASS photometry…”
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Interstellar extinction curve variations towards the inner Milky Way: a challenge to observational cosmology by Nataf, David M., Gonzalez, Oscar A., Casagrande, Luca, Zasowski, Gail, Wegg, Christopher, Wolf, Christian, Kunder, Andrea, Alonso-Garcia, Javier, Minniti, Dante, Rejkuba, Marina, Saito, Roberto K., Valenti, Elena, Zoccali, Manuela, Poleski, Radosław, Pietrzyński, Grzegorz, Skowron, Jan, Soszyński, Igor, Szymański, Michał K., Udalski, Andrzej, Ulaczyk, Krzysztof, Wyrzykowski, Łukasz

“…We investigate interstellar extinction curve variations towards ∼4 deg2 of the inner Milky Way in VIJKs photometry from the OGLE-III (third phase of the…”
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Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters by Lund, Mikkel N., Aguirre, Víctor Silva, Davies, Guy R., Chaplin, William J., Christensen-Dalsgaard, Jørgen, Houdek, Günter, White, Timothy R., Bedding, Timothy R., Ball, Warrick H., Huber, Daniel, Antia, H. M., Lebreton, Yveline, Latham, David W., Handberg, Rasmus, Verma, Kuldeep, Basu, Sarbani, Casagrande, Luca, Justesen, Anders B., Kjeldsen, Hans, Mosumgaard, Jakob R.

“…The advent of space-based missions like Kepler has revolutionized the study of solar-type stars, particularly through the measurement and modeling of their…”
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The EMBLA survey – metal-poor stars in the Galactic bulge by Howes, Louise M., Asplund, Martin, Keller, Stefan C., Casey, Andrew R., Yong, David, Lind, Karin, Frebel, Anna, Hays, Austin, Alves-Brito, Alan, Bessell, Michael S., Casagrande, Luca, Marino, Anna F., Nataf, David M., Owen, Christopher I., Da Costa, Gary S., Schmidt, Brian P., Tisserand, Patrick

“…Cosmological models predict the oldest stars in the Galaxy should be found closest to the centre of the potential well, in the bulge. The Extremely Metal-poor…”
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SEGUE-2: Old Milky Way Stars Near and Far by Rockosi, Constance M., Sun Lee, Young, Morrison, Heather L., Yanny, Brian, Johnson, Jennifer A., Lucatello, Sara, Sobeck, Jennifer, Beers, Timothy C., Allende Prieto, Carlos, An, Deokkeun, Bizyaev, Dmitry, Blanton, Michael R., Casagrande, Luca, Eisenstein, Daniel J., Gould, Andrew, Gunn, James E., Harding, Paul, Ivans, Inese I., Jacobson, H. R., Janesh, William, Knapp, Gillian R., Kollmeier, Juna A., Lépine, Sébastien, López-Corredoira, Martín, Ma, Zhibo, Newberg, Heidi J., Pan, Kaike, Prchlik, Jakub, Sayers, Conor, Schlesinger, Katharine J., Simmerer, Jennifer, Weinberg, David H.

“…Abstract The Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2) obtained 128,288 low-resolution spectra ( R ∼ 1800) of 118,958 unique stars…”
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The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era by Casey, Andrew R., Hawkins, Keith, Hogg, David W., Ness, Melissa, Rix, Hans-Walter, Kordopatis, Georges, Kunder, Andrea, Steinmetz, Matthias, Koposov, Sergey, Enke, Harry, Sanders, Jason, Gilmore, Gerry, Zwitter, Tomaž, Freeman, Kenneth C., Casagrande, Luca, Matijevič, Gal, Seabroke, George, Bienaymé, Olivier, Bland-Hawthorn, Joss, Gibson, Brad K., Grebel, Eva K., Helmi, Amina, Munari, Ulisse, Navarro, Julio F., Reid, Warren, Siebert, Arnaud, Wyse, Rosemary

“…The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy…”
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Star Formation Timescales of the Halo Populations from Asteroseismology and Chemical Abundances by Matsuno, Tadafumi, Aoki, Wako, Casagrande, Luca, Ishigaki, Miho N., Shi, Jianrong, Takata, Masao, Xiang, Maosheng, Yong, David, Li, Haining, Suda, Takuma, Xing, Qianfan, Zhao, Jingkun

“…Abstract We combine asteroseismology, optical high-resolution spectroscopy, and kinematic analysis for 26 halo red giant branch stars in the Kepler field in…”
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GRACES observations of young [α/Fe]-rich stars by Yong, David, Casagrande, Luca, Venn, Kim A., Chené, André-Nicolas, Keown, Jared, Malo, Lison, Martioli, Eder, Alves-Brito, Alan, Asplund, Martin, Dotter, Aaron, Martell, Sarah L., Meléndez, Jorge, Schlesinger, Katharine J.

“…We measure chemical abundance ratios and radial velocities in four massive (i.e. young) [α/Fe]-rich red giant stars using high-resolution high-S/N spectra from…”
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Unveiling systematic biases in the 1D LTE excitation-ionization balance of Fe for FGK stars: a novel approach to determination of stellar parameters by Ruchti, Gregory R., Bergemann, Maria, Serenelli, Aldo, Casagrande, Luca, Lind, Karin

“…We present a comprehensive analysis of different techniques available for the spectroscopic analysis of FGK stars and provide a recommended methodology which…”
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Asteroseismic masses of retired planet-hosting A-stars using SONG by Stello, Dennis, Huber, Daniel, Grundahl, Frank, Lloyd, James, Ireland, Mike, Casagrande, Luca, Fredslund, Mads, Bedding, Timothy R., Palle, Pere L., Antoci, Victoria, Kjeldsen, Hans, Christensen-Dalsgaard, Jørgen

“…Abstract To better understand how planets form, it is important to study planet occurrence rates as a function of stellar mass. However, estimating masses of…”
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DOES SEGUE/SDSS INDICATE A DUAL GALACTIC HALO? by Schönrich, Ralph, Asplund, Martin, Casagrande, Luca

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An analytic-geospatial approach for sustainable water resource management: a case study in the province of Perugia by Casadei, Stefano, Bellezza, Michele, Casagrande, Luca, Pierleoni, Arnaldo

“…Water is a strategic, but also highly vulnerable, natural resource. This because the increasing demand from multiple uses, in many cases competing amongst…”
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Selecting accreted populations: metallicity, elemental abundances, and ages of the Gaia-Sausage-Enceladus and Sequoia populations by Feuillet, Diane K, Sahlholdt, Christian L, Feltzing, Sofia, Casagrande, Luca

“…ABSTRACT Identifying stars found in the Milky Way as having formed in situ or accreted can be a complex and uncertain undertaking. We use Gaia kinematics and…”
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The SAGA so far: reading the history of the Galaxy with asteroseismology by Casagrande, Luca, Aguirre, Victor Silva, Serenelli, Aldo M., Stello, Dennis, Feltzing, Sofia, Schlesinger, Katharine J.

“…Asteroseismology has the capability of delivering stellar properties which would otherwise be inaccessible, such as radii, masses and thus ages of stars. When…”
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