Results 21 to 30 of about 234,759 (330)
Computation, 2020 Quantum–chemical calculations of the electronic characteristics of carbon and boron-doped silicon polyprismanes were carried out, and the atomic hydrogen adsorption on these structures was analyzed.
Konstantin Grishakov +2 more
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
Self-Regulation of Star Formation in Low Metallicity Clouds [PDF]
, 2000 We investigate the process of self-regulated star formation via photodissociation of hydrogen molecules in low metallicity clouds. We evaluate the influence region's scale of a massive star in low metallicity gas clouds whose temperatures are between 100
de Jong T. +5 more
core +3 more sources
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
Metal–metal bonded compounds and metal clusters [PDF]
Inorganica Chimica Acta, 2015 Preface.
Falvello, Larry R., Murillo, Carlos A.
openaire +3 more sources
Photometric Metallicity and Distance Estimates for ∼136,000 RR Lyrae Stars from Gaia Data Release 3
The 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
Properties and occurrence rates of $Kepler$ exoplanet candidates as a function of host star metallicity from the DR25 catalog [PDF]
, 2018 Correlations between the occurrence rate of exoplanets and their host star properties provide important clues about the planet formation processes. We studied the dependence of the observed properties of exoplanets (radius, mass, and orbital period) as a
Banyal, R. K. +7 more
core +4 more sources
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
Metallicity gradients in local field star-forming galaxies: Insights on inflows, outflows, and the coevolution of gas, stars and metals [PDF]
, 2015 We present metallicity gradients in 49 local field star-forming galaxies. We derive gas-phase oxygen abundances using two widely adopted metallicity calibrations based on the [OIII]/Hbeta, [NII]/Halpha and [NII]/[OII] line ratios.
Bresolin, Fabio +6 more
core +1 more source