Zobrazeno 1 - 10
of 383
pro vyhledávání: '"Venn, Kim A"'
Autor:
Sestito, Federico, Fernandez-Alvar, Emma, Brooks, Rebecca, Olson, Emma, Carigi, Leticia, Jofre, Paula, Silva, Danielle de Brito, Eldridge, Camilla J. L., Vitali, Sara, Venn, Kim A., Hill, Vanessa, Ardern-Arentsen, Anke, Kordopatis, Georges, Martin, Nicolas F., Navarro, Julio F., Starkenburg, Else, Tissera, Patricia B., Jablonka, Pascale, Lardo, Carmela, Lucchesi, Romain, Buck, Tobias, Amayo, Alexia
We analyse high-resolution ESPaDOnS/CFHT spectra of 20 very metal-poor stars ([Fe/H]~$<-2.0$) in the solar neighbourhood (within $\sim2$ kpc) selected to be on planar orbits (maximum height of $<4$ kpc). Targets include 11 prograde and 9 retrograde s
Externí odkaz:
http://arxiv.org/abs/2409.13813
Autor:
Viswanathan, Akshara, Byström, Amanda, Starkenburg, Else, Foppen, Anne, Straat, Jill, Montelius, Martin, Sestito, Federico, Venn, Kim A., Navarrete, Camila, Matsuno, Tadafumi, Martin, Nicolas F., Thomas, Guillaume F., Ardern-Arentsen, Anke, Battaglia, Giuseppina, Fouesneau, Morgan, Navarro, Julio, Vitali, Sara
Context: In the context of Galactic archaeology, the outer halo remains relatively unexplored with respect to its metallicity distribution, merger debris, and the abundance of known very/extremely metal-poor ([Fe/H]<-2.5) stars. Aim: We utilize the P
Externí odkaz:
http://arxiv.org/abs/2408.17250
Autor:
Ness, Melissa K., Mendel, J. Trevor, Buder, Sven, Wheeler, Adam, Ji, Alexander P., Mijnarends, Luka, Venn, Kim, Starkenburg, Else, Leaman, Ryan, Grasha, Kathryn, Aquilina, Sarah
The element abundances of local group galaxies connect enrichment mechanisms to galactic properties and serve to contextualise the Milky Way's abundance distributions. Individual stellar spectra in nearby galaxies can be extracted from Integral Field
Externí odkaz:
http://arxiv.org/abs/2407.17661
Autor:
Sestito, Federico, Ardern-Arentsen, Anke, Vitali, Sara, Montelius, Martin, Lucchesi, Romain, Venn, Kim A., Martin, Nicolas F., Navarro, Julio F., Starkenburg, Else
We aim to constrain the chemo-dynamical properties of the Sagittarius (Sgr) dwarf galaxy using carbon abundances. Our sample from the \textit{Pristine} Inner Galaxy Survey (PIGS) includes $\sim 350$ metal-poor ([Fe/H]~$<-1.5$) stars in the main body
Externí odkaz:
http://arxiv.org/abs/2406.18636
Autor:
de La Vernhe, Isaure González Rivera, Hill, Vanessa, Kordopatis, Georges, Gran, Felipe, Fernández-Alvar, Emma, Ardern-Arentsen, Anke, Thomas, Guillaume F., Sestito, Federico, Navarrete, Camila, Martin, Nicolas F., Starkenburg, Else, Viswanathan, Akshara, Battaglia, Giuseppina, Venn, Kim A., Vitali, Sara
Through the chemodynamical characterisation of metal-poor stars, one can efficiently probe the early history of the Milky Way. We aim at decontaminating a sample of $\sim$ 3M giant stars with Gaia DR3 XP-based \textit{Pristine-Gaia} metallicities, to
Externí odkaz:
http://arxiv.org/abs/2406.05728
Autor:
Sestito, Federico, Vitali, Sara, Jofre, Paula, Venn, Kim A., Aguado, David S., Aguilera-Gómez, Claudia, Ardern-Arentsen, Anke, Silva, Danielle de Brito, Carlberg, Raymond, Eldridge, Camilla J. L., Gran, Felipe, Hill, Vanessa, Jablonka, Pascale, Kordopatis, Georges, Martin, Nicolas F., Matsuno, Tadafumi, Rusterucci, Samuel, Starkenburg, Else, Viswanathan, Akshara
Publikováno v:
A&A 689, A201 (2024)
The most metal-poor stars provide valuable insights into the early chemical enrichment history of a system, carrying the chemical imprints of the first generations of supernovae. The most metal-poor region of the Sagittarius dwarf galaxy remains inad
Externí odkaz:
http://arxiv.org/abs/2405.00096
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:
Cheng, Isaac, Woods, Tyrone E., Côté, Patrick, Glover, Jennifer, Bansal, Dhananjhay, Amenouche, Melissa, Marshall, Madeline A., Amen, Laurie, Hutchings, John, Ferrarese, Laura, Venn, Kim A., Balogh, Michael, Blouin, Simon, Cloutier, Ryan, Dickson, Nolan, Gallagher, Sarah, Hellmich, Martin, Hénault-Brunet, Vincent, Khatu, Viraja, Lawlor-Forsyth, Cameron, Morgan, Cameron, Richer, Harvey, Sawicki, Marcin, Sorba, Robert
The Cosmological Advanced Survey Telescope for Optical and ultraviolet Research (CASTOR) is a proposed Canadian-led 1m-class space telescope that will carry out ultraviolet and blue-optical wide-field imaging, spectroscopy, and photometry. CASTOR wil
Externí odkaz:
http://arxiv.org/abs/2402.08137
Autor:
Ardern-Arentsen, Anke, Monari, Giacomo, Queiroz, Anna B. A., Starkenburg, Else, Martin, Nicolas F., Chiappini, Cristina, Aguado, David S., Belokurov, Vasily, Carlberg, Ray, Monty, Stephanie, Myeong, GyuChul, Schultheis, Mathias, Sestito, Federico, Venn, Kim A., Vitali, Sara, Yuan, Zhen, Zhang, Hanyuan, Buder, Sven, Lewis, Geraint F., Oliver, William H., Wan, Zhen, Zucker, Daniel B.
The oldest stars in the Milky Way (born in the first few billion years) are expected to have a high density in the inner few kpc, spatially overlapping with the Galactic bulge. We use spectroscopic data from the Pristine Inner Galaxy Survey (PIGS) to
Externí odkaz:
http://arxiv.org/abs/2312.03847
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