Results 1 to 10 of about 684,546 (234)

Metallicity dependence of HMXB populations [PDF]

open access: yes, 2015
High-mass X-ray binaries (HMXBs) might have contributed a non-negligible fraction of the energy feedback to the interstellar and intergalactic media at high redshift, becoming important sources for the heating and ionization history of the Universe ...
Douna, V. M.   +3 more
core   +14 more sources

The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z ∼ 8 [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2022
We analyse the chemical properties of three z∼ 8 galaxies behind the galaxy cluster SMACS J0723.3-7327, observed as part of the Early Release Observations programme of the James Webb Space Telescope (JWST).
M. Curti   +32 more
semanticscholar   +1 more source

Electrical Conductivity of Multiwall Carbon Nanotube Bundles Contacting with Metal Electrodes by Nano Manipulators inside SEM

open access: yesNanomaterials, 2021
Determining the metallicity and semiconductivity of a multi-walled carbon nanotube (MWCNT) bundle plays a particularly vital role in its interconnection with the metal electrode of an integrated circuit.
Quan Yang   +10 more
doaj   +1 more source

JWST Census for the Mass–Metallicity Star Formation Relations at z = 4–10 with Self-consistent Flux Calibration and Proper Metallicity Calibrators

open access: yesAstrophysical Journal Supplement Series, 2023
We present the evolution of the mass–metallicity (MZ) relation at z = 4–10 derived with 135 galaxies identified in JWST/NIRSpec data taken from the three major public spectroscopy programs of ERO, GLASS, and CEERS.
K. Nakajima   +7 more
semanticscholar   +1 more source

Progenitors of Long-Duration Gamma-ray Bursts

open access: yesGalaxies, 2021
We review the current scenario of long-duration Gamma-ray burst (LGRB) progenitors, and in addition, present models of massive stars for a mass range of 10–150M⊙ with ΔM=10M⊙ and rotation rate v/vcrit=0 to 0.6 with a velocity resolution Δv/vcrit=0.1.
Arpita Roy
doaj   +1 more source

Revisiting the Planet Mass and Stellar Metallicity Relation for Low-Mass Exoplanets Orbiting GKM Class Stars

open access: yesUniverse, 2021
The growing database of exoplanets has shown us the statistical characteristics of various exoplanet populations, providing insight towards their origins.
Jonathan H. Jiang   +4 more
doaj   +1 more source

Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges

open access: yesUniverse, 2022
In this paper, we make use of data collected for open cluster members by high-resolution spectroscopic surveys and programmes (i.e., APOGEE, Gaia-ESO, GALAH, OCCASO, and SPA). These data have been homogenised and then analysed as a whole.
Lorenzo Spina   +2 more
doaj   +1 more source

The effect of the metallicity-specific star formation history on double compact object mergers [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
We investigate the impact of uncertainty in the metallicity-specific star formation rate over cosmic time on predictions of the rates and masses of double compact object mergers observable through gravitational waves.
C. Neijssel   +9 more
semanticscholar   +1 more source

The influence of metallicity on helium and CO core masses in massive stars [PDF]

open access: yesSerbian Astronomical Journal, 2023
We present the results of 58 detailed evolutionary models of massive single stars and close binary systems with the Solar and Small Magellanic Cloud (SMC) metallicity computed with the MESA (Modules for Experiments in Stellar Astrophysics ...
Petrović Jelena
doaj   +1 more source

The mass–metallicity and the fundamental metallicity relation revisited on a fully Te-based abundance scale for galaxies [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
The relationships between stellar mass, gas-phase metallicity and star-formation rate (i.e. the mass–metallicity, MZR, and the fundamental metallicity relation, FMR) in the local Universe are revisited by fully anchoring the metallicity determination ...
M. Curti   +3 more
semanticscholar   +1 more source

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