Results 21 to 30 of about 656,950 (323)
The Astrophysical Journal, 2023 The atmospheric metallicity greatly influences the composition of exoplanet atmospheres. The effect of metallicity on the thermochemical equilibrium is well studied, though its effect on the disequilibrium abundance is loosely constrained. In this study,
Vikas Soni, Kinsuk Acharyya
doaj +1 more source
The 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
Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity [PDF]
, 2000 We present analytic formulae that approximate the evolution of stars for a wide range of mass M and metallicity Z. Stellar luminosity, radius and core mass are given as a function of age, M and Z, for all phases from the zero-age main sequence up to, and
J. Hurley, O. Pols, C. Tout
semanticscholar +1 more source
The Chocolate Chip Cookie Model: Dust-to-metal Ratio of H ii Regions
The Astrophysical Journal Letters, 2023 Using a sample of face-on star-forming galaxies selected from the Sloan Digital Sky Survey, we statistically derive the typical optical depth τ _cl of individual H ii regions based on the “Chocolate Chip Cookie” model of Lu et al. (2022).
Jiafeng Lu +3 more
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Is the atomic metal vapor a dielectric state? [PDF]
Physica Scripta, 2021, 2020 We propose a simple method for calculating the metal vapor conductivity at the critical point and near-critical isotherms. This method's base is the hypothesis of an electron jellium's existence as an origin of the conduction band in metal vapor's gaseous phase. Satisfactory agreement with the experimental data for alkali metals (Cs, Rb) concludes that
arxiv +1 more source
“Direct” Gas-phase Metallicity in Local Analogs of High-redshift Galaxies: Empirical Metallicity Calibrations for High-redshift Star-forming Galaxies [PDF]
Astrophysical Journal, 2018 We study the direct gas-phase oxygen abundance using the well-detected auroral line [O iii]λ4363 in the stacked spectra of a sample of local analogs of high-redshift galaxies.
F. Bian, L. Kewley, M. Dopita
semanticscholar +1 more source
The 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
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Metallicity Calibrations and the Mass-Metallicity Relation for Star-forming Galaxies [PDF]
, 2008 We investigate the effect of metallicity calibrations, AGN classification, and aperture covering fraction on the local mass-metallicity (M-Z) relation using 27,730 star-forming galaxies from the SDSS Data Release 4.
L. Kewley, S. Ellison
semanticscholar +1 more source
Odessa 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
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Merging black hole binaries: the effects of progenitor's metallicity, mass-loss rate and Eddington factor [PDF]
, 2017 The first four gravitational wave events detected by LIGO were all interpreted as merging black hole binaries (BHBs), opening a new perspective on the study of such systems. Here we use our new population-synthesis code MOBSE, an upgraded version of BSE (
N. Giacobbo, M. Mapelli, M. Spera
semanticscholar +1 more source