Zobrazeno 1 - 10
of 24 343
pro vyhledávání: '"Metallicity"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-20 (2024)
Abstract Ab-initio simulations using density functional theory (DFT) were employed to investigate the structural, mechanical, electronic, magnetic, optical, and thermoelectric properties of halide perovskites $$\hbox {BaCoX}_3$$ (X = Cl, Br, I). Stru
Externí odkaz:
https://doaj.org/article/e87a8b277fd946cc8b92a24e32f7c199
Autor:
Iltaf Muhammad, Muhammad Mushtaq, Naeem Ullah, Shehzad Ahmed, Arzoo Hassan, Xiaoqing Tian, Yong Wang, M. Khalid Hossain
Publikováno v:
Results in Physics, Vol 66, Iss , Pp 108024- (2024)
We systematically investigated the electronic, magnetic, and optical properties of the FeMnSb half-Heusler alloy, its (001) surface, and its interfaces with GaAs and GaP semiconductors by using first-principles calculations based on density functiona
Externí odkaz:
https://doaj.org/article/049b95ca2520422f971b697acd416d5c
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
We study the metallicity distribution and evolution in the galactic disk based on the largest sample of open star clusters in the galaxy. From the catalog of 1,879 open clusters in the range of galactocentric distance (RGC) from 4 to 20 kpc, we inves
Externí odkaz:
https://doaj.org/article/a15c3050ce914158870c82570beedf4e
Autor:
Adam J. Burgasser, Roman Gerasimov, Kyle Kremer, Hunter Brooks, Efrain Alvarado III, Adam C. Schneider, Aaron M. Meisner, Christopher A. Theissen, Emma Softich, Preethi Karpoor, Thomas P. Bickle, Martin Kabatnik, Austin Rothermich, Dan Caselden, J. Davy Kirkpatrick, Jacqueline K. Faherty, Sarah L. Casewell, Marc J. Kuchner, The Backyard Worlds: Planet 9 Collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L25 (2024)
We report the discovery of a high-velocity, very low-mass star or brown dwarf whose kinematics suggest it is unbound to the Milky Way. CWISE J124909.08+362116.0 was identified by citizen scientists in the Backyard Worlds: Planet 9 program as a high-p
Externí odkaz:
https://doaj.org/article/4986ac695b8943b2b4bcb6950e377b9b
Autor:
Chengyu Ma, Kai Wang, Enci Wang, Yingjie Peng, Haochen Jiang, Haoran Yu, Cheng Jia, Zeyu Chen, Haixin Li, Xu Kong
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L14 (2024)
The gas-phase metallicity of galaxies is regulated by multiple astrophysical processes, which makes it a crucial diagnostic of galaxy formation and evolution. Beyond the fundamental mass–metallicity relation, a debate about the secondary galaxy pro
Externí odkaz:
https://doaj.org/article/e3e1745d067843e093cfea00b4d6150f
Autor:
Kai Xiao, Bowen Huang, Yang Huang, Haibo Yuan, Timothy C. Beers, Jifeng Liu, Maosheng Xiang, Xue Lu, Shuai Xu, Lin Yang, Chuanjie Zheng, Zhirui Li, Bowen Zhang, Ruifeng Shi
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L24 (2024)
We search for an optimal filter design for the estimation of stellar metallicity, based on synthetic photometry from Gaia XP spectra convolved with a series of filter-transmission curves defined by different central wavelengths and bandwidths. Unlike
Externí odkaz:
https://doaj.org/article/6c818680dada4f73825b0e899235fd32
Autor:
Andrew Marszewski, Guochao Sun, Claude-André Faucher-Giguère, Christopher C. Hayward, Robert Feldmann
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L41 (2024)
The unprecedented infrared spectroscopic capabilities of JWST have provided high-quality interstellar medium metallicity measurements and enabled characterization of the gas-phase mass–metallicity relation (MZR) for galaxies at z ≳ 5 for the firs
Externí odkaz:
https://doaj.org/article/c2b8e2f4cf3a4c909a74d6a2ebce8fdf
Autor:
Xin Wang, Cheng Cheng, Junqiang Ge, Xiao-Lei Meng, Emanuele Daddi, Haojing Yan, Zhiyuan Ji, Yifei Jin, Tucker Jones, Matthew A. Malkan, Pablo Arrabal Haro, Gabriel Brammer, Masamune Oguri, Meicun Hou, Shiwu Zhang
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L42 (2024)
Cosmic hydrogen reionization and cosmic production of the first metals are major phase transitions of the Universe occurring during the first billion years after the Big Bang; however, these are still underexplored observationally. Using the JWST/NIR
Externí odkaz:
https://doaj.org/article/b0e4a84729264edd97565d7d650ae0be
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 2, p L25 (2024)
Cosmic metals are believed to originate from stellar and supernovae (SNe) nucleosynthesis, dispersed into the interstellar medium (ISM) through stellar winds and supernova explosions. In this paper, we present the clear evidence of metal enrichment b
Externí odkaz:
https://doaj.org/article/e2e67061f8d442fb98a481b9ef67850a
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