Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Ella Xi Wang"'
Autor:
Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 125 (2024)
We present the discovery of 2MASS J05241392−0336543 (hereafter J0524−0336), a very metal-poor ([Fe/H] = −2.43 ± 0.16), highly r -process-enhanced ([Eu/Fe] = +1.34 ± 0.10) Milky Way halo field red giant star, with an ultrahigh Li abundance of
Externí odkaz:
https://doaj.org/article/787793d6ab884c2fabbad575dfea9b23
Publikováno v:
Wang, E X, Nordlander, T, Asplund, M, Lind, K, Zhou, Y & Reggiani, H 2022, ' Non-detection of 6 Li in Spite plateau stars with ESPRESSO ', Monthly Notices of the Royal Astronomical Society, vol. 509, no. 1, pp. 1521-1535 . https://doi.org/10.1093/mnras/stab2924
The detection of $^6$Li in Spite plateau stars contradicts the standard Big Bang nucleosynthesis prediction, known as the second cosmological lithium problem. We measure the isotopic ratio $^6$Li/$^7$Li in three Spite plateau stars: HD 84937, HD 1402
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b85ca5b4f8b1bd48b948e66e23bf8d9c
http://arxiv.org/abs/2110.03822
http://arxiv.org/abs/2110.03822
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 483:4640-4648
Most cosmological simulations of galaxy evolution include active galactic nucleus (AGN) feedback, typically seeding black holes with masses of $\geq 10^5\, h^{-1}\, \rm{M}_{\odot}$ when the dark matter halo exceeds a given threshold mass. Taylor & Ko
Autor:
Sanjib Sharma, Anish M. Amarsi, G. M. De Silva, Maria Bergemann, Martin Asplund, Sven Buder, Yeisson Osorio, Henrique Reggiani, Klemen Čotar, Thomas Nordlander, X. D. Gao, Sarah L. Martell, Paul S. Barklem, Janez Kos, Geraint F. Lewis, Karin Lind, Daniel B. Zucker, Á. Skúladóttir, Jonathan Horner, Ansgar Wehrhahn, Jeffrey D. Simpson, Amanda I. Karakas, Ella Xi Wang, Joss Bland-Hawthorn, Chiaki Kobayashi
Publikováno v:
Astronomy & Astrophysics
Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major challenges in this endeavour invo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::341afeec65e6ef6ed4a13619eb191e79
http://arxiv.org/abs/2008.09582
http://arxiv.org/abs/2008.09582
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Mon Not R Astron Soc
Mon Not R Astron Soc
Accurately known stellar lithium abundances may be used to shed light on a variety of astrophysical phenomena such as Big Bang nucleosynthesis, radial migration, ages of stars and stellar clusters, and planet engulfment events. We present a grid of s
Autor:
Ella Xi Wang, Chris Lidman, Fiona H. Panther, Roland M. Crocker, Brent Groves, Ashley J. Ruiter, B. Tucker, Ivo R. Seitenzahl
SN1991bg-like supernovae are a distinct subclass of thermonuclear supernovae (SNe Ia). Their spectral and photometric peculiarities indicate their progenitors and explosion mechanism differ from `normal' SNe Ia. One method of determining information
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e039833b3a02522735dd19115ea10d94