Results 21 to 30 of about 682,505 (235)
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
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
“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
doaj +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
doaj +1 more source
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
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
Heavy Metal Rules. I. Exoplanet Incidence and Metallicity
Geosciences, 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
Slater-Pauling behavior and origin of the half-metallicity of the full-Heusler alloys [PDF]
, 2002 Using the full-potential screened Korringa-Kohn-Rostoker method we study the full-Heusler alloys based on Co, Fe, Rh, and Ru. We show that many of these compounds show a half-metallic behavior; however, in contrast to the half-Heusler alloys the energy ...
I. Galanakis +2 more
semanticscholar +1 more source
The evolution of the mass-metallicity relation and its scatter in IllustrisTNG [PDF]
Monthly notices of the Royal Astronomical Society, 2017 The coevolution of galaxies and their metal content serves as an important test for galaxy feedback models. We analyze the distribution and evolution of metals within the IllustrisTNG simulation suite with a focus on the gas-phase mass-metallicity ...
P. Torrey +10 more
semanticscholar +1 more source