Search Results - "Venn, Kim"

Tracing the formation of the Milky Way through ultra metal-poor stars by Sestito, Federico, Longeard, Nicolas, Martin, Nicolas F, Starkenburg, Else, Fouesneau, Morgan, González Hernández, Jonay I, Arentsen, Anke, Ibata, Rodrigo, Aguado, David S, Carlberg, Raymond G, Jablonka, Pascale, Navarro, Julio F, Tolstoy, Eline, Venn, Kim A

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Chemical Abundances in the Ultra-faint Dwarf Galaxies Grus I and Triangulum II: Neutron-capture Elements as a Defining Feature of the Faintest Dwarfs by Ji, Alexander P., Simon, Joshua D., Frebel, Anna, Venn, Kim A., Hansen, Terese T.

“…Abstract We present high-resolution spectroscopy of four stars in two candidate ultra-faint dwarf galaxies (UFDs), Grus I (Gru I) and Triangulum II (Tri II)…”
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Chemo-dynamics of outer halo dwarf stars, including Gaia -Sausage and Gaia -Sequoia candidates by Monty, Stephanie, Venn, Kim A, Lane, James M M, Lokhorst, Deborah, Yong, David

“…ABSTRACT The low-metallicity, kinematically interesting dwarf stars studied by Stephens & Boesgaard (2002, SB02) are re-examined using Gaia DR2 astrometry, and…”
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Exploring the origin of low-metallicity stars in Milky-Way-like galaxies with the NIHAO-UHD simulations by Sestito, Federico, Buck, Tobias, Starkenburg, Else, Martin, Nicolas F, Navarro, Julio F, Venn, Kim A, Obreja, Aura, Jablonka, Pascale, Macciò, Andrea V

“…ABSTRACT The kinematics of the most metal-poor stars provide a window into the early formation and accretion history of the Milky Way (MW). Here, we use…”
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The Impact of Modeling Assumptions in Galactic Chemical Evolution Models by Côté, Benoit, O'Shea, Brian W., Ritter, Christian, Herwig, Falk, Venn, Kim A.

“…We use the OMEGA galactic chemical evolution code to investigate how the assumptions used for the treatment of galactic inflows and outflows impact numerical…”
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The Pristine Inner Galaxy Survey (PIGS) II: Uncovering the most metal-poor populations in the inner Milky Way by Arentsen, Anke, Starkenburg, Else, Martin, Nicolas F, Aguado, David S, Zucker, Daniel B, Allende Prieto, Carlos, Hill, Vanessa, Venn, Kim A, Carlberg, Raymond G, González Hernández, Jonay I, Mashonkina, Lyudmila I, Navarro, Julio F, Sánchez-Janssen, Rubén, Schultheis, Mathias, Thomas, Guillaume F, Youakim, Kris, Lewis, Geraint F, Simpson, Jeffrey D, Wan, Zhen, Cohen, Roger E, Geisler, Doug, O’Connell, Julia E

“…ABSTRACT Metal-poor stars are important tools for tracing the early history of the Milky Way, and for learning about the first generations of stars…”
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Binarity in carbon-enhanced metal-poor stars by Starkenburg, Else, Shetrone, Matthew D., McConnachie, Alan W., Venn, Kim A.

“…A substantial fraction of the lowest metallicity stars show very high enhancements in carbon. It is debated whether these enhancements reflect the stars’ birth…”
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Pristine dwarf galaxy survey – I. A detailed photometric and spectroscopic study of the very metal-poor Draco II satellite by Longeard, Nicolas, Martin, Nicolas, Starkenburg, Else, Ibata, Rodrigo A, Collins, Michelle L M, Geha, Marla, Laevens, Benjamin P M, Rich, R Michael, Aguado, David S, Arentsen, Anke, Carlberg, Raymond G, Côté, Patrick, Hill, Vanessa, Jablonka, Pascale, González Hernández, Jonay I, Navarro, Julio F, Sánchez-Janssen, Rubén, Tolstoy, Eline, Venn, Kim A, Youakim, Kris

“…We present a detailed study of the faint Milky Way satellite Draco II (Dra II) from deep CFHT/MegaCam broad-band g and i photometry and narrow-band…”
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The Pristine survey – IX. CFHT ESPaDOnS spectroscopic analysis of 115 bright metal-poor candidate stars by Venn, Kim A, Kielty, Collin L, Sestito, Federico, Starkenburg, Else, Martin, Nicolas, Aguado, David S, Arentsen, Anke, Bonifacio, Piercarlo, Caffau, Elisabetta, Hill, Vanessa, Jablonka, Pascale, Lardo, Carmela, Mashonkina, Lyudmilla, Navarro, Julio F, Sneden, Chris, Thomas, Guillaume, Youakim, Kris, González-Hernández, Jonay I, Sánchez Janssen, Rubén, Carlberg, Ray, Malhan, Khyati

“…ABSTRACT A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT…”
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The Pristine survey – X. A large population of low-metallicity stars permeates the Galactic disc by Sestito, Federico, Martin, Nicolas F, Starkenburg, Else, Arentsen, Anke, Ibata, Rodrigo A, Longeard, Nicolas, Kielty, Collin, Youakim, Kristopher, Venn, Kim A, Aguado, David S, Carlberg, Raymond G, González Hernández, Jonay I, Hill, Vanessa, Jablonka, Pascale, Kordopatis, Georges, Malhan, Khyati, Navarro, Julio F, Sánchez-Janssen, Rubén, Thomas, Guillame, Tolstoy, Eline, Wilson, Thomas G, Palicio, Pedro A, Bialek, Spencer, Garcia-Dias, Rafael, Lucchesi, Romain, North, Pierre, Osorio, Yeisson, Patrick, Lee R, Peralta de Arriba, Luis

“…ABSTRACT The orbits of the least chemically enriched stars open a window on the formation of our Galaxy when it was still in its infancy. The common picture is…”
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The Pristine survey – I. Mining the Galaxy for the most metal-poor stars by Starkenburg, Else, Martin, Nicolas, Youakim, Kris, Aguado, David S., Allende Prieto, Carlos, Arentsen, Anke, Bernard, Edouard J., Bonifacio, Piercarlo, Caffau, Elisabetta, Carlberg, Raymond G., Côté, Patrick, Fouesneau, Morgan, François, Patrick, Franke, Oliver, González Hernández, Jonay I., Gwyn, Stephen D. J., Hill, Vanessa, Ibata, Rodrigo A., Jablonka, Pascale, Longeard, Nicolas, McConnachie, Alan W., Navarro, Julio F., Sánchez-Janssen, Rubén, Tolstoy, Eline, Venn, Kim A.

“…Abstract We present the Pristine survey, a new narrow-band photometric survey focused on the metallicity-sensitive Ca H&K lines and conducted in the Northern…”
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StarUnLink: identifying and mitigating signals from communication satellites in stellar spectral surveys by Bialek, Spencer, Lucatello, Sara, Fabbro, Sebastien, Yi, Kwang Moo, Venn, Kim A

“…ABSTRACT A relatively new concern for the forthcoming massive spectroscopic sky surveys is the impact of contamination from low earth orbit satellites. Several…”
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The Pristine survey IV: approaching the Galactic metallicity floor with the discovery of an ultra-metal-poor star by Starkenburg, Else, Aguado, David S, Bonifacio, Piercarlo, Caffau, Elisabetta, Jablonka, Pascale, Lardo, Carmela, Martin, Nicolas, Sánchez-Janssen, Rubén, Sestito, Federico, Venn, Kim A, Youakim, Kris, Allende Prieto, Carlos, Arentsen, Anke, Gentile, Marc, González Hernández, Jonay I, Kielty, Collin, Koppelman, Helmer H, Longeard, Nicolas, Tolstoy, Eline, Carlberg, Raymond G, Côté, Patrick, Fouesneau, Morgan, Hill, Vanessa, McConnachie, Alan W, Navarro, Julio F

“…The early Universe presented a star formation environment that was almost devoid of heavy elements. The lowest metallicity stars thus provide a unique window…”
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The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal-poor Stars in the Galactic Halo by Sakari, Charli M., Placco, Vinicius M., Farrell, Elizabeth M., Roederer, Ian U., Wallerstein, George, Beers, Timothy C., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese, Holmbeck, Erika M., Sneden, Christopher, Cowan, John J., Venn, Kim A., Davis, Christopher Evan, Matijevi, Gal, Wyse, Rosemary F. G., Bland-Hawthorn, Joss, Chiappini, Cristina, Freeman, Kenneth C., Gibson, Brad K., Grebel, Eva K., Helmi, Amina, Kordopatis, Georges, Kunder, Andrea, Navarro, Julio, Reid, Warren, Seabroke, George, Steinmetz, Matthias, Watson, Fred

“…This paper presents the detailed abundances and r-process classifications of 126 newly identified metal-poor stars as part of an ongoing collaboration, the…”
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The Pristine survey – XII. Gemini-GRACES chemo-dynamical study of newly discovered extremely metal-poor stars in the Galaxy by Kielty, Collin L, Venn, Kim A, Sestito, Federico, Starkenburg, Else, Martin, Nicolas F, Aguado, David S, Arentsen, Anke, Fabbro, Sébastien, González Hernández, Jonay I, Hill, Vanessa, Jablonka, Pascale, Lardo, Carmela, Mashonkina, Lyudmila I, Navarro, Julio F, Sneden, Chris, Thomas, Guillaume F, Youakim, Kris, Bialek, Spencer, Sánchez-Janssen, Rubén

“…ABSTRACT High-resolution optical spectra of 30 metal-poor stars selected from the Pristine survey are presented, based on observations taken with the Gemini…”
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Assessing the performance of LTE and NLTE synthetic stellar spectra in a machine learning framework by Bialek, Spencer, Fabbro, Sébastien, Venn, Kim A, Kumar, Nripesh, O’Briain, Teaghan, Yi, Kwang Moo

“…ABSTRACT In the current era of stellar spectroscopic surveys, synthetic spectral libraries are the basis for the derivation of stellar parameters and chemical…”
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The Pristine Inner Galaxy Survey (PIGS) III: carbon-enhanced metal-poor stars in the bulge by Arentsen, Anke, Starkenburg, Else, Aguado, David S, Martin, Nicolas F, Placco, Vinicius M, Carlberg, Raymond, González Hernández, Jonay I, Hill, Vanessa, Jablonka, Pascale, Kordopatis, Georges, Lardo, Carmela, Mashonkina, Lyudmila I, Navarro, Julio F, Venn, Kim A, Buder, Sven, Lewis, Geraint F, Wan, Zhen, Zucker, Daniel B

“…ABSTRACT The most metal-deficient stars hold important clues about the early buildup and chemical evolution of the Milky Way, and carbon-enhanced metal-poor…”
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The Cosmic Hunt for members in the outskirts of ultra-faint dwarf galaxies: Ursa Major I, Coma Berenices, and Boötes I by Waller, Fletcher, Venn, Kim A, Sestito, Federico, Jensen, Jaclyn, Kielty, Collin L, Borukhovetskaya, Asya, Hayes, Christian, McConnachie, Alan W, Navarro, Julio F

“…ABSTRACT Gaia EDR3 data were used to identify potential members in the outskirts of three ultra-faint dwarf (UFD) galaxies: Coma Berenices (>2Rh), Ursa Major I…”
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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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Stars on the edge: Galactic tides and the outskirts of the Sculptor dwarf spheroidal by Sestito, Federico, Roediger, Joel, Navarro, Julio F, Jensen, Jaclyn, Venn, Kim A, Smith, Simon E T, Hayes, Christian, McConnachie, Alan W

“…ABSTRACT The formation of ‘stellar haloes’ in dwarf galaxies have been discussed in terms of early mergers or Galactic tides, although fluctuations in the…”
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