Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Hayes, Christian R."'
Autor:
Berg, Trystyn A. M., Hayes, Christian R., Cristiani, Stefano, McConnachie, Alan, Robertson, J. Gordon, Sestito, Federico, Simpson, Chris, Waller, Fletcher, Chin, Timothy, Densmore, Adam, Diaz, Ruben J., Edgar, Michael L., Lettura, Javier Fuentes, Gómez-Jiménez, Manuel, Kalari, Venu M., Lawrence, Jon, Margheim, Steven, Pazder, John, Ruiz-Carmona, Roque, Salinas, Ricardo, Silva, Karleyne M. G., Silversides, Katherine, Venn, Kim A.
The Gemini High-resolution Optical SpecTrograph (GHOST) is a new echelle spectrograph available on the Gemini-South telescope as of Semester 2024A. We present the first high resolution spectrum of the quasar J1449-1227 (redshift z_em=3.27) using data
Externí odkaz:
http://arxiv.org/abs/2404.10058
Autor:
Sit, Tawny, Weinberg, David H., Wheeler, Adam, Hayes, Christian R., Hasselquist, Sten, Masseron, Thomas, Sobeck, Jennifer
Stellar abundance measurements are subject to systematic errors that induce extra scatter and artificial correlations in elemental abundance patterns. We derive empirical calibration offsets to remove systematic trends with surface gravity $\log(g)$
Externí odkaz:
http://arxiv.org/abs/2403.08067
Autor:
Smith, Simon E. T., Cerny, William, Hayes, Christian R., Sestito, Federico, Jensen, Jaclyn, McConnachie, Alan W., Geha, Marla, Navarro, Julio, Li, Ting S., Cuillandre, Jean-Charles, Errani, Raphaël, Chambers, Ken, Gwyn, Stephen, Hammer, Francois, Hudson, Michael J., Magnier, Eugene, Martin, Nicolas
We present the discovery of Ursa Major III/UNIONS 1, the least luminous known satellite of the Milky Way, which is estimated to have an absolute V-band magnitude of $+2.2^{+0.4}_{-0.3}$ mag, equivalent to a total stellar mass of 16$^{+6}_{-5}$ M$_{\o
Externí odkaz:
http://arxiv.org/abs/2311.10147
Autor:
Placco, Vinicius M., Almeida-Fernandes, Felipe, Holmbeck, Erika M., Roederer, Ian U., Mardini, Mohammad K., Hayes, Christian R., Venn, Kim, Chiboucas, Kristin, Deibert, Emily, Gamen, Roberto, Heo, Jeong-Eun, Jeong, Miji, Kalari, Venu, Martioli, Eder, Xu, Siyi, Diaz, Ruben, Gomez-Jimenez, Manuel, Henderson, David, Prado, Pablo, Quiroz, Carlos, Ruiz-Carmona, Roque, Simpson, Chris, Urrutia, Cristian, McConnachie, Alan W., Pazder, John, Burley, Gregory, Ireland, Michael, Waller, Fletcher, Berg, Trystyn A. M., Robertson, J. Gordon, Hartman, Zachary, Jones, David O., Labrie, Kathleen, Perez, Gabriel, Ridgway, Susan, Thomas-Osip, Joanna
We report on the chemo-dynamical analysis of SPLUS J142445.34-254247.1, an extremely metal-poor halo star enhanced in elements formed by the rapid neutron-capture process. This star was first selected as a metal-poor candidate from its narrow-band S-
Externí odkaz:
http://arxiv.org/abs/2310.17024
Autor:
Dovgal, Anya, Venn, Kim A., Sestito, Federico, Hayes, Christian R., McConnachie, Alan W., Navarro, Julio F., Placco, Vinicius M., Starkenburg, Else, Martin, Nicolas F., Pazder, John S., Chiboucas, Kristin, Deibert, Emily, Gamen, Roberto, Heo, Jeong-Eun, Kalari, Venu M., Martioli, Eder, Xu, Siyi, Diaz, Ruben, Gomez-Jiminez, Manuel, Henderson, David, Prado, Pablo, Quiroz, Carlos, Robertson, J. Gordon, Ruiz-Carmona, Roque, Simpson, Chris, Urrutia, Cristian, Waller, Fletcher, Berg, Trsytyn, Burley, Gregory, Hartman, Zachary, Ireland, Michael, Margheim, Steve, Perez, Gabriel, Thomas-Osip, Joanna
Publikováno v:
MNRAS 527 (2024) 7810-7824
Pristine_183.6849+04.8619 (P1836849) is an extremely metal-poor ([Fe/H]$=-3.3\pm0.1$) star on a prograde orbit confined to the Galactic disk. Such stars are rare and may have their origins in protogalactic fragments that formed the early Milky Way, i
Externí odkaz:
http://arxiv.org/abs/2310.03075
Autor:
Jensen, Jaclyn, Hayes, Christian R., Sestito, Federico, McConnachie, Alan W., Waller, Fletcher, Smith, Simon E. T., Navarro, Julio, Venn, Kim A.
Dwarf galaxies are valuable laboratories for dynamical studies related to dark matter and galaxy evolution, yet it is currently unknown just how physically extended their stellar components are. Satellites orbiting the Galaxy's potential may undergo
Externí odkaz:
http://arxiv.org/abs/2308.07394
Autor:
Sestito, Federico, Hayes, Christian R., Venn, Kim A., Jensen, Jaclyn, McConnachie, Alan W., Pazder, John, Waller, Fletcher, Arentsen, Anke, Jablonka, Pascale, Martin, Nicolas F., Matsuno, Tadafumi, Navarro, Julio F., Starkenburg, Else, Vitali, Sara, Bassett, John, Berg, Trystyn A. M., Diaz, Ruben, Edgar, Michael L., Firpo, Veronica, Gomez-Jimenez, Manuel, Kalari, Venu, Lambert, Sam, Lawrence, Jon, Robertson, Gordon, Ruiz-Carmona, Roque, Salinas, Ricardo, Sebo, Kim M., Venkatesan, Sudharshan
This study focuses on Pristine$\_180956.78$$-$$294759.8$ (hereafter P180956, $[Fe/H] =-1.95\pm0.02$), a star selected from the Pristine Inner Galaxy Survey (PIGS), and followed-up with the recently commissioned Gemini High-resolution Optical SpecTrog
Externí odkaz:
http://arxiv.org/abs/2308.07366
Autor:
Imig, Julie, Price, Cathryn, Holtzman, Jon A., Stone-Martinez, Alexander, Majewski, Steven R., Weinberg, David H., Johnson, Jennifer A., Prieto, Carlos Allende, Beaton, Rachael L., Beers, Timothy C., Bizyaev, Dmitry, Blanton, Michael R., Brownstein, Joel R., Cunha, Katia, Fernández-Trincado, José G., Feuillet, Diane K., Hasselquist, Sten, Hayes, Christian R., Jönsson, Henrik, Lane, Richard R., Lian, Jianhui, Mészáros, Szabolcs, Nidever, David L., Robin, Annie C., Shetrone, Matthew, Smith, Verne, Wilson, John C.
Publikováno v:
ApJ 954 124 (2023)
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), $\alpha$-element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observ
Externí odkaz:
http://arxiv.org/abs/2307.13887
Autor:
McCormick, Caroline, Majewski, Steven R., Smith, Verne V., Hayes, Christian R., Cunha, Katia, Masseron, Thomas, Weiss, Achim, Shetrone, Matthew, Almeida, Andrés, Frinchaboy, Peter M., García-Hernández, Domingo Aníbal, Nitschelm, Christian
Standard stellar evolution theory poorly predicts the surface abundances of chemical species in low-mass, red giant branch (RGB) stars. Observations show an enhancement of p-p chain and CNO cycle products in red giant envelopes, which suggests the ex
Externí odkaz:
http://arxiv.org/abs/2307.11191
Autor:
Hayes, Christian R., Venn, Kim A., Waller, Fletcher, Jensen, Jaclyn, McConnachie, Alan W., Pazder, John, Sestito, Federico, Anthony, Andre, Baker, Gabriella, Bassett, John, Bento, Joao, Burley, Gregory, Brzeski, Jurek, Case, Scott, Chapin, Edward, Chin, Timothy, Chisholm, Eric, Churilov, Vladimir, Densmore, Adam, Diaz, Ruben, Dunn, Jennifer, Edgar, Michael, Farrell, Tony, Firpo, Veronica, Fitzsimmons, Joeleff, Font-Serra, Juan, Fuentes, Javier, Ganton, Colin, Gomez-Jimenez, Manuel, Hardy, Tim, Henderson, David, Hill, Alexis, Hoff, Brian, Ireland, Michael, Kalari, Venu, Kelly, Neal, Klauser, Urs, Kondrat, Yuriy, Labrie, Kathleen, Lambert, Sam, Luvaul, Lance, Lawrence, Jon, Lothrop, Jordan, Macdonald, G. Scott, Mali, Slavko, Margheim, Steve, McDermid, Richard, McGregor, Helen, Miller, Bryan, Miranda, Felipe, Muller, Rolf, Nielsen, Jon, Norbury, Ryan, Oberdorf, Oliver, Pai, Naveen, Perez, Gabriel, Prado, Pablo, Price, Ian, Quiroz, Carlos, Reshetov, Vladimir, Robertson, Gordon, Ruiz-Carmona, Roque, Salinas, Ricardo, Sebo, Kim M., Sheinis, Andrew, Shetrone, Matthew, Shortridge, Keith, Silversides, Katherine, Silva, Karleyne, Simpson, Chris, Smith, Greg, Szeto, Kei, Tims, Julia, Toro, Eduardo, Urrutia, Cristian, Venkatesan, Sudharshan, Waller, Lewis, Wevers, Ivan, Wierzbicki, Ramunas, White, Marc, Young, Peter, Zhelem, Ross
The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high resolution spectrograph to be developed for a large aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present the first s
Externí odkaz:
http://arxiv.org/abs/2306.04804