Search Results - "Placco, V. M"

Early spectra of the gravitational wave source GW170817: Evolution of a neutron star merger by Shappee, B. J., Simon, J. D., Drout, M. R., Piro, A. L., Morrell, N., Prieto, J. L., Kasen, D., Holoien, T. W.-S., Kollmeier, J. A., Kelson, D. D., Coulter, D. A., Foley, R. J., Kilpatrick, C. D., Siebert, M. R., Madore, B. F., Murguia-Berthier, A., Pan, Y.-C., Prochaska, J. X., Ramirez-Ruiz, E., Rest, A., Adams, C., Alatalo, K., Bañados, E., Baughman, J., Bernstein, R. A., Bitsakis, T., Boutsia, K., Bravo, J. R., Di Mille, F., Higgs, C. R., Ji, A. P., Maravelias, G., Marshall, J. L., Placco, V. M., Prieto, G., Wan, Z.

“…On 17 August 2017, Swope Supernova Survey 2017a (SSS17a) was discovered as the optical counterpart of the binary neutron star gravitational wave event…”
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AN ELEMENTAL ASSAY OF VERY, EXTREMELY, AND ULTRA-METAL-POOR STARS by Hansen, T, Hansen, C J, Christlieb, N, Beers, T C, Yong, D, Bessell, M S, Frebel, A, Perez, A E Garcia, Placco, V M, Norris, J E, Asplund, M

“…We present a high-resolution elemental-abundance analysis for a sample of 23 very metal-poor ([Fe/H] < -2.0) stars, 12 of which are extremely metal-poor…”
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EXPLORING THE ORIGIN OF LITHIUM, CARBON, STRONTIUM, AND BARIUM WITH FOUR NEW ULTRA METAL-POOR STARS by Hansen, T, Hansen, C J, Christlieb, N, Yong, D, Bessell, M S, PEREZ, A E GARCIA, Beers, T C, PLACCO, V M, FREBEL, A, Norris, J E, Asplund, M

“…We present an elemental abundance analysis for four newly discovered ultra metal-poor stars from the Hamburg/ESO survey, with [Fe/H] [< or =, slant] -4. Based…”
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The age structure of the Milky Way’s halo by Carollo, D., Beers, T. C., Placco, V. M., Santucci, R. M., Denissenkov, P., Tissera, P. B., Lentner, G., Rossi, S., Lee, Y. S., Tumlinson, J.

“…We present a new, high-resolution chronographic (age) map of the Milky Way’s halo, based on the inferred ages of ∼130,000 field blue horizontal-branch (BHB)…”
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Characterization of high-velocity stars in the S-PLUS internal fourth data release by Quispe-Huaynasi, F, Roig, F, Placco, V M, Beraldo e Silva, L, Daflon, S, Pereira, C B, Kanaan, A, Mendes de Oliveira, C, Ribeiro, T, Schoenell, W

“…ABSTRACT In general, the atypical high velocity of some stars in the Galaxy can only be explained by invoking acceleration mechanisms related to extreme…”
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Chemodynamical properties and ages of metal-poor stars in S-PLUS by Almeida-Fernandes, F, Placco, V M, Rocha-Pinto, H J, Fernandes, M B, Limberg, G, Silva, L Beraldo e, Amarante, J A S, Perottoni, H D, Overzier, R, Schoenell, W, Ribeiro, T, Kanaan, A, Mendes de Oliveira, C

“…ABSTRACT Metal-poor stars are key to our understanding of the early stages of chemical evolution in the Universe. New multifilter surveys, such as the Southern…”
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Data Release 2 of S-PLUS: Accurate template-fitting based photometry covering ∼1000 deg2 in 12 optical filters by Almeida-Fernandes, F, SamPedro, L, Herpich, F R, Molino, A, Barbosa, C E, Buzzo, M L, Overzier, R A, de Lima, E V R, Nakazono, L M I, Oliveira Schwarz, G B, Perottoni, H D, Bolutavicius, G F, Gutiérrez-Soto, L A, Santos-Silva, T, Vitorelli, A Z, Werle, A, Whitten, D D, Costa Duarte, M V, Bom, C R, Coelho, P, Sodré, L, Placco, V M, Teixeira, G S M, Alonso-García, J, Barbosa, C L, Beers, T C, Bonatto, C J, Chies-Santos, A L, Hartmann, E A, Lopes de Oliveira, R, Navarete, F, Kanaan, A, Ribeiro, T, Schoenell, W, Mendes de Oliveira, C

“…ABSTRACT The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ∼9300 deg2 in the southern sky in a 12-band photometric system. This…”
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Abundance analysis of APOGEE spectra for 58 metal-poor stars from the bulge spheroid by Razera, R, Barbuy, B, Moura, T C, Ernandes, H, Pérez-Villegas, A, Souza, S O, Chiappini, C, Queiroz, A B A, Anders, F, Fernández-Trincado, J G, Friaça, A C S, Cunha, K, Smith, V V, Santiago, B X, Schiavon, R P, Valentini, M, Minniti, D, Schultheis, M, Geisler, D, Sobeck, J, Placco, V M, Zoccali, M

“…ABSTRACT The central part of the Galaxy hosts a multitude of stellar populations, including the spheroidal bulge stars, stars moved to the bulge through…”
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Light elements Na and Al in 58 bulge spheroid stars from APOGEE by Barbuy, B, Friaça, A C S, Ernandes, H, Moura, T, Masseron, T, Cunha, K, Smith, V V, Souto, D, Pérez-Villegas, A, Souza, S O, Chiappini, C, Queiroz, A B A, Fernández-Trincado, J G, da Silva, P, Santiago, B X, Anders, F, Schiavon, R P, Valentini, M, Minniti, D, Geisler, D, Placco, V M, Zoccali, M, Schultheis, M, Nitschelm, C, Beers, T C, Razera, R

“…ABSTRACT We identified a sample of 58 candidate stars with metallicity [Fe/H] ≲ −0.8 that likely belong to the old bulge spheroid stellar population, and…”
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Gemini High-resolution Optical Spectrograph (GHOST) at Gemini South: Instrument Performance and Integration, First Science, and Next Steps by Kalari, V. M., Diaz, R. J., Robertson, G., McConnachie, A., Ireland, M., Salinas, R., Young, P., Simpson, C., Hayes, C., Nielsen, J., Burley, G., Pazder, J., Gomez-Jimenez, M., Martioli, E., Howell, S. B., Jeong, M., Juneau, S., Ruiz-Carmona, R., Margheim, S., Sheinis, A., Anthony, A., Baker, G., Berg, T. A. M., Cao, T., Chapin, E., Chin, T., Chiboucas, K., Churilov, V., Deibert, E., Densmore, A., Dunn, J., Edgar, M. L., Heo, J., Henderson, D., Farrell, T., Font, J., Firpo, V., Fuentes, J., Labrie, K., Lambert, S., Lawrence, J., Lothrop, J., McDermid, R., Miller, B. W., Perez, G., Placco, V. M., Prado, P., Quiroz, C., Ramos, F., Rutten, R., Silva, K. M. G., Thomas-Osip, J., Urrutia, C., Vacca, W. D., Venn, K., Waller, F., Waller, L., White, M., Xu, S., Zhelem, R.

“…Abstract The Gemini South telescope is now equipped with a new high-resolution spectrograph called the Gemini High-resolution Optical SpecTrograph (GHOST)…”
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Assessing the photometric redshift precision of the S-PLUS survey: the Stripe-82 as a test-case by Molino, A, Costa-Duarte, M V, Sampedro, L, Herpich, F R, Sodré, L, Mendes de Oliveira, C, Schoenell, W, Barbosa, C E, Queiroz, C, Lima, E V R, Azanha, L, Muñoz-Elgueta, N, Ribeiro, T, Kanaan, A, Hernandez-Jimenez, J A, Cortesi, A, Akras, S, Lopes de Oliveira, R, Torres-Flores, S, Lima-Dias, C, Castellon, J L Nilo, Damke, G, Alvarez-Candal, A, Jiménez-Teja, Y, Coelho, P, Pereira, E, Montero-Dorta, A D, Benítez, N, Gonçalves, T S, Santana-Silva, L, Werner, S V, Almeida, L A, Lopes, P A A, Chies-Santos, A L, Telles, E, de Souza, Thom, C, R, Gonçalves, D R, de Souza, R S, Makler, M, Buzzo, M L, Placco, V M, Nakazono, L M I, Saito, R K, Overzier, R A, Abramo, L R

“…ABSTRACT In this paper we present a thorough discussion about the photometric redshift (photo-z) performance of the Southern Photometric Local Universe Survey…”
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J-PLUS: characterization of high-velocity stars in the second data release by Quispe-Huaynasi, F, Roig, F, Daflon, S, Pereira, C B, Placco, V M, Jiménez-Esteban, F, Galindo-Guil, F J, Alvarez-Candal, A, Alcaniz, J, Angulo, R E, Cenarro, J, Cristóbal-Hornillos, D, Dupke, R, Ederoclite, A, Hernández-Monteagudo, C, López-Sanjuan, C, Marín-Franch, A, Moles, M, Sodré, L, Varela, J, Vázquez Ramió, H

“…ABSTRACT High-velocity stars in the Milky Way are related to extreme astrophysical phenomena. In this work, we characterize 28 stars with Galactocentric…”
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The miniJPAS survey: stellar atmospheric parameters from 56 optical filters by Yuan, H-B, Yang, L, Cruz, P, Jiménez-Esteban, F, Daflon, S, Placco, V M, Akras, S, Alfaro, E J, Galarza, C Andrés, Gonçalves, D R, Duan, F-Q, Liu, J-F, Laur, J, Solano, E, Borges Fernandes, M, Cenarro, A J, Marín-Franch, A, Varela, J, Ederoclite, A, López-Sanjuan, Carlos, Abramo, R, Alcaniz, J, Benítez, N, Bonoli, S, Cristóbal-Hornillos, D, Dupke, R A, Hernán-Caballero, Antonio, Mendes de Oliveira, C, Moles, M, Sodré, L, Vázquez Ramió, Héctor, Taylor, K

“…ABSTRACT With a unique set of 54 overlapping narrow-band and two broader filters covering the entire optical range, the incoming Javalambre-Physics of the…”
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Carbon-enhanced metal-poor stars in the SDSS–APOGEE data base by Kielty, C. L., Venn, K. A., Loewen, N. B., Shetrone, M. D., Placco, V. M., Jahandar, F., Mészáros, Sz, Martell, S. L.

“…Abstract We identify six new carbon-enhanced metal-poor (CEMP) stars ([C/Fe]>+0.7 and [Fe/H] < −1.8) and another seven likely candidates within the APOGEE data…”
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Abundance analysis of APOGEE spectra for 58 metal-poor stars from the bulge spheroid by Razera, R, Barbuy, B, Moura, T. C, Ernandes, H, Pérez-Villegas, A, Souza, S. O, Chiappini, C, Queiroz, A. B. A, Anders, F, Fernández-Trincado, J. G, Friaça, A. C. S, Cunha, K, Smith, V. V, Santiago, B. X, Schiavon, R. P, Valentini, M, Minniti, D, Schultheis, M, Geisler, D, Sobeck, J, Placco, V. M, Zoccali, M

“…The central part of the Galaxy host a multitude of stellar populations, including the spheroidal bulge stars, stars moved to the bulge through secular…”
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The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies, and redshifts with 12 optical filters by Mendes de Oliveira, C, Ribeiro, T, Schoenell, W, Kanaan, A, Overzier, R A, Molino, A, Sampedro, L, Coelho, P, Barbosa, C E, Cortesi, A, Costa-Duarte, M V, Herpich, F R, Hernandez-Jimenez, J A, Placco, V M, Xavier, H S, Abramo, L R, Saito, R K, Chies-Santos, A L, Ederoclite, A, Lopes de Oliveira, R, Gonçalves, D R, Akras, S, Almeida, L A, Almeida-Fernandes, F, Beers, T C, Bonatto, C, Bonoli, S, Cypriano, E S, Vinicius-Lima, E, de Souza, R S, Fabiano de Souza, G, Ferrari, F, Gonçalves, T S, Gonzalez, A H, Gutiérrez-Soto, L A, Hartmann, E A, Jaffe, Y, Kerber, L O, Lima-Dias, C, Lopes, P A A, Menendez-Delmestre, K, Nakazono, L M I, Novais, P M, Ortega-Minakata, R A, Pereira, E S, Perottoni, H D, Queiroz, C, Reis, R R R, Santos, W A, Santos-Silva, T, Santucci, R M, Barbosa, C L, Siffert, Beatriz B, Sodré, L, Torres-Flores, S, Westera, P, Whitten, D D, Alcaniz, J S, Alonso-García, Javier, Alencar, S, Alvarez-Candal, A, Amram, P, Azanha, L, Barbá, R H, Bernardinelli, P H, Borges Fernandes, M, Branco, V, Brito-Silva, D, Buzzo, M L, Caffer, J, Campillay, A, Cano, Z, Carvano, J M, Castejon, M, Cid Fernandes, R, Dantas, M L L, Daflon, S, Damke, G, de la Reza, R, de Melo de Azevedo, L J, De Paula, D F, Diem, K G, Donnerstein, R, Dors, O L, Dupke, R, Eikenberry, S, Escudero, Carlos G, Faifer, Favio R, Farías, H, Fernandes, B, Fernandes, C, Fontes, S, Galarza, A, Hirata, N S T, Katena, L, Gregorio-Hetem, J, Hernández-Fernández, J D, Izzo, L, Jaque Arancibia, M, Jatenco-Pereira, V

“…ABSTRACT The Southern Photometric Local Universe Survey (S-PLUS) is imaging ∼9300 deg2 of the celestial sphere in 12 optical bands using a dedicated 0.8 m…”
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The miniJPAS survey: stellar atmospheric parameters from 56 optical filters by Yuan, H. -B, Yang, L, Cruz, P, Jiménez-Esteban, F, Daflon, S, Placco, V. M, Akras, S, Alfaro, E. J, Galarza, C. Andrés, Gonçalves, D. R, Duan, F. -Q, Liu, J. -F, Laur, J, Solano, E, Fernandes, M. Borges, Cenarro, A. J, Marín-Franch, A, Varela, J, Ederoclite, A, López-Sanjuan, Carlos, Abramo, R, Alcaniz, J, Benítez, N, Bonoli, S, Cristóbal-Hornillos, D, Dupke, R. A, Hernán-Caballero, Antonio, de Oliveira, C. Mendes, Moles, M, SodréJr, L, Ramió, Héctor Vázquez, Taylor, K

“…With a unique set of 54 overlapping narrow-band and two broader filters covering the entire optical range, the incoming Javalambre-Physics of the Accelerating…”
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J-PLUS: Systematic impact of metallicity on photometric calibration with the stellar locus by López-Sanjuan, C, Yuan, H, Ramió, H. Vázquez, Varela, J, Cristóbal-Hornillos, D, Tremblay, P. -E, Marín-Franch, A, Cenarro, A. J, Ederoclite, A, Alfaro, E. J, Alvarez-Candal, A, Daflon, S, Hernán-Caballero, A, Hernández-Monteagudo, C, Jiménez-Esteban, F. M, Placco, V. M, Tempel, E, Alcaniz, J, Angulo, R. E, Dupke, R. A, Moles, M, SodréJr, L

“…A&A 654, A61 (2021) We present the updated photometric calibration of the twelve optical passbands for the Javalambre Photometric Local Universe Survey…”
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The miniJPAS survey: star-galaxy classification using machine learning by Baqui, P. O, Marra, V, Casarini, L, Angulo, R, Díaz-García, L. A, Hernández-Monteagudo, C, Lopes, P. A. A, López-Sanjuan, C, Muniesa, D, Placco, V. M, Quartin, M, Queiroz, C, Sobral, D, Solano, E, Tempel, E, Varela, J, Vílchez, J. M, Abramo, R, Alcaniz, J, Benitez, N, Bonoli, S, Carneiro, S, Cenarro, A. J, Cristóbal-Hornillos, D, de Amorim, A. L, de Oliveira, C. M, Dupke, R, Ederoclite, A, Delgado, R. M. González, Marín-Franch, A, Moles, M, Ramió, H. Vázquez, Sodré, L, Taylor, K

“…A&A 645, A87 (2021) Future astrophysical surveys such as J-PAS will produce very large datasets, which will require the deployment of accurate and efficient…”
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Abundance analysis of APOGEE spectra for 58 metal-poor stars from the bulge spheroid by Razera, R., Barbuy, B., Moura, T. C., Ernandes, H., Pérez-Villegas, A., Souza, S. O., Chiappini, C., Queiroz, A. B. A., Anders, F., Fernández-Trincado, J. G., Friaça, A. C. S., Cunha, K., Smith, V. V., Santiago, B. X., Schiavon, R. P., Valentini, M., Minniti, D., Schultheis, M., Geisler, D., Sobeck, J., Placco, V. M., Zoccali, M.

“…ABSTRACT The central part of the Galaxy hosts a multitude of stellar populations, including the spheroidal bulge stars, stars moved to the bulge through…”
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