Zobrazeno 1 - 10
of 323
pro vyhledávání: '"KARAKAS, Amanda I."'
Autor:
Kemp, Alex J., Karakas, Amanda I., Casey, Andrew R., Cote, Benoit, Izzard, Robert G., Osborn, Zara
Context. The explosive burning that drives nova eruptions results in unique nucleosynthesis that heavily over-produces certain isotopes relative to the solar abundance. However, novae are often ignored when considering the chemical evolution of our G
Externí odkaz:
http://arxiv.org/abs/2407.18718
Aluminium-26 is a radioactive isotope which can be synthesized within asymptotic giant branch (AGB) stars, primarily through hot bottom burning. Studies exploring $^{26}$Al production within AGB stars typically focus on single-stars; however, observa
Externí odkaz:
http://arxiv.org/abs/2310.09060
Autor:
Yong, David, Liu, Fan, Ting, Yuan-Sen, Joyce, Meridith, Bitsch, Bertram, Dai, Fei, Dotter, Aaron, Karakas, Amanda I., Murphy, Michael T.
We conduct a line-by-line differential analysis of a sample of 125 co-moving pairs of stars (dwarfs and subgiants near solar metallicity). We obtain high precision stellar parameters with average uncertainties in effective temperature, surface gravit
Externí odkaz:
http://arxiv.org/abs/2309.01546
The minimum initial mass required for a star to explode as an Fe core collapse supernova, typically denoted $M_\text{mas}$, is an important quantity in stellar evolution because it defines the border between intermediate mass and massive stellar evol
Externí odkaz:
http://arxiv.org/abs/2308.06002
Autor:
Lian, Jianhui, Storm, Nicholas, Guiglion, Guillaume, Serenelli, Aldo, Cote, Benoit, Karakas, Amanda I., Boardman, Nick, Bergemann, Maria
Most heavy elements beyond the iron peak are synthesized via neutron capture processes. The nature of the astrophysical sites of neutron capture processes is still very unclear. In this work we explore the observational constraints of the chemical ab
Externí odkaz:
http://arxiv.org/abs/2308.01111
Autor:
Ziliotto, Tuila, Milone, Antonino P., Marino, Anna F., Dotter, Aaron L., Renzini, Alvio, Vesperini, Enrico, Karakas, Amanda I., Cordoni, Giacomo, Dondoglio, Emanuele, Legnardi, Maria V., Lagioia, Edoardo P., Mohandasan, Anjana, Baimukhametova, Sarah
Publikováno v:
ApJ 953 62 (2023)
Recent work on metal-intermediate globular clusters (GCs) with [Fe/H]=$-1.5$ and $-0.75$ has illustrated the theoretical behavior of multiple populations in photometric diagrams obtained with the James Webb Space Telescope (JWST). These results are c
Externí odkaz:
http://arxiv.org/abs/2304.06026
Autor:
Monty, Stephanie, Yong, David, Massari, Davide, McKenzie, Madeleine, Myeong, GyuChul, Buder, Sven, Karakas, Amanda I., Freeman, Ken C., Marino, Anna F., Belokurov, Vasily, Evans, N. Wyn
The assembly history of the Milky Way (MW) is a rapidly evolving subject, with numerous small accretion events and at least one major merger proposed in the MW's history. Accreted alongside these dwarf galaxies are globular clusters (GCs), which act
Externí odkaz:
http://arxiv.org/abs/2302.06644
Autor:
De Marco, Orsola, Akashi, Muhammad, Akras, Stavros, Alcolea, Javier, Aleman, Isabel, Amram, Philippe, Balick, Bruce, De Beck, Elvire, Blackman, Eric G., Boffin, Henri M. J., Boumis, Panos, Bublitz, Jesse, Bucciarelli, Beatrice, Bujarrabal, Valentin, Cami, Jan, Chornay, Nicholas, Chu, You-Hua, Corradi, Romano L. M., Frank, Adam, Garcia-Segura, Guillermo, Garcia-Hernandez, D. A., Garcia-Rojas, Jorge, Gomez-Llanos, Veronica, Goncalves, Denise R., Guerrero, Martin A., Jones, David, Karakas, Amanda I., Kastner, Joel H., Kwok, Sun, Lykou, Foteini, Manchado, Arturo, Matsuura, Mikako, McDonald, Iain, Monreal-Ibero, Ana, Monteiro, Hektor, Baez, Paula Moraga, Morisset, Christophe, Miszalski, Brent, Mohamed, Shazrene S., Montez Jr., Rodolfo, Nordhaus, Jason, de Oliveira, Claudia Mendes, Osborn, Zara, Otsuka, Masaaki, Parker, Quentin A., Peeters, Els, Quint, Bruno C., Quintana-Lacaci, Guillermo, Redman, Matt, Ruiter, Ashley J., Sabin, Laurence, Contreras, Carmen Sanchez, Santander-Garcia, Miguel, Seitenzahl, Ivo, Sahai, Raghvendra, Soker, Noam, Speck, Angela K., Stanghellini, Letizia, Steffen, Wolfgang, Toala, Jesus A., Ueta, Toshiya, Van de Steene, Griet, Villaver, Eva, Ventura, Paolo, Vlemmings, Wouter, Walsh, Jeremy R., Wesson, Roger, van Winckel, Hans, Zijlstra, Albert A.
Publikováno v:
Nature Astronomy, 2022, Vol. 6, p. 1421
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Early Release
Externí odkaz:
http://arxiv.org/abs/2301.02775
Autor:
Monty, Stephanie, Yong, David, Marino, Anna F., Karakas, Amanda I., McKenzie, Madeleine, Grundahl, Frank, Mura-Guzmán, Aldo
The view of globular clusters (GCs) as simple systems continues to unravel, revealing complex objects hosting multiple chemical peculiarities. Using differential abundance analysis, we probe the chemistry of the Type I GC, NGC 288 and the Type II GC,
Externí odkaz:
http://arxiv.org/abs/2210.15061
Publikováno v:
The Astrophysical Journal 939.1(2022):50
One--dimensional stellar structure and evolution programs are built using different physical prescriptions and algorithms, which means there can be variations between models' predictions even when using identical input physics. This leads to question
Externí odkaz:
http://arxiv.org/abs/2208.01859