Results 21 to 30 of about 241,989 (335)

A Surprising Lack of Metallicity Evolution with Redshift in the Long Gamma-Ray Burst Host Galaxy Population

open access: yesThe Astrophysical Journal, 2023
The number of long-duration gamma-ray burst (LGRB) host galaxies with measured metallicities and host masses has expanded sufficiently to investigate how the distributions of these properties change with redshift.
J. F. Graham, P. Schady, A. S. Fruchter
doaj   +1 more source

Metal–metal bonded compounds and metal clusters [PDF]

open access: yesInorganica Chimica Acta, 2015
Preface.
Falvello, Larry R., Murillo, Carlos A.
openaire   +2 more sources

Heavy Metal Rules. I. Exoplanet Incidence and Metallicity

open access: yesGeosciences, 2019
The discovery of only a handful of exoplanets required establishing a correlation between giant planet occurrence and metallicity of their host stars.
Vardan Adibekyan
doaj   +1 more source

High-resolution Spectroscopic Metallicities of Milky Way Cepheid Standards and Their Impact on the Leavitt Law and the Hubble Constant

open access: yesThe Astrophysical Journal Letters, 2023
Milky Way Cepheid variables with accurate Hubble Space Telescope photometry have been established as standards for primary calibration of the cosmic distance ladder to achieve a percent-level determination of the Hubble constant ( H _0 ).
Anupam Bhardwaj   +12 more
doaj   +1 more source

Photometric Metallicity and Distance Estimates for ∼136,000 RR Lyrae Stars from Gaia Data Release 3

open access: yesThe Astrophysical Journal, 2023
We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity and distance estimates from our newly calibrated P – ϕ _31 – R _21 –[Fe/H]/ P – R _21 –[Fe/H] and G -band absolute magnitude–metallicity relations.
Xin-Yi Li   +4 more
doaj   +1 more source

Spintronic phase transition of graphene/BN/graphene van de Waals heterostructures

open access: yesResults in Physics, 2022
Based on a single-orbital tight-binding (TB) Hubbard model under mean-field approximation, we study band structure and half-metallicity of zigzag graphene/boron nitride/graphene (Z-G/BN/G) trilayer nanoribbon systems.
Quanyuan Cao, Lei Xu, Jun Zhang
doaj   +1 more source

Metal to Orthogonal Metal Transition* [PDF]

open access: yesChinese Physics Letters, 2020
Orthogonal metal is a new quantum metallic state that conducts electricity but acquires no Fermi surface (FS) or quasiparticles, and hence orthogonal to the established paradigm of Landau’s Fermi-liquid (FL). Such a state may hold the key of understanding the perplexing experimental observations of quantum metals that are beyond FL ...
Chen, Chuang   +3 more
openaire   +3 more sources

Nearby supernova host galaxies from the CALIFA Survey: II. SN environmental metallicity [PDF]

open access: yes, 2016
The metallicity of a supernova (SN) progenitor, together with its mass, is one of the main parameters that rules their outcome.
Badenes, C.   +18 more
core   +9 more sources

Chemodynamic evolution of dwarf galaxies in tidal fields [PDF]

open access: yes, 2016
The mass-metallicity relation shows that the galaxies with the lowest mass have the lowest metallicities. As most dwarf galaxies are in group environments, interaction effects such as tides could contribute to this trend.
Martel, Hugo   +2 more
core   +2 more sources

THE STUDY OF GALACTIC BEAT CEPHEIDS WITH APPLICATION OF ITS RESULTS TO THOSE IN THE MAGELLANIC CLOUDS

open access: yesOdessa Astronomical Publications, 2014
A thorough study of the correlation between P1=P0 ratio, fundamental period, and chemical composition (abundances of metals that compose Z) was conducted to investigate the significance of the iron-peak elements on the ratio. The results suggested a more
F. A. Chekhonadskikh   +2 more
doaj   +1 more source

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