Results 31 to 40 of about 59,474 (295)
Short-lived Radionuclides in the Milky Way Galaxy [PDF]
EPJ Web of Conferences, 2023 The short-lived radionuclides (SLRs) have a half-life ≤ 100 Myr. The γ-ray observations and excess abundance of their daughter nuclides in various meteoritic phases confirm the existence of SLRs in the Galaxy and early solar system (ESS), respectively ...
Kaur Tejpreet
doaj +1 more source
He abundances in disc galaxies. I. Predictions from cosmological chemodynamical simulations [PDF]
, 2019 Accepted for publication in A&AWe investigate how the stellar and gas-phase He abundances evolve as a function of time within simulated star-forming disc galaxies with different star formation histories.
Kobayashi, Chiaki +4 more
core +5 more sources
On the α/Fe Bimodality of the M31 Disks
The Astrophysical Journal Letters, 2023 An outstanding question is whether the α /Fe bimodality exists in disk galaxies other than in the Milky Way. Here we present a bimodality using our state-of-the-art galactic chemical evolution models that can explain various observations in the Andromeda
Chiaki Kobayashi +3 more
doaj +1 more source
Chemical Evolution of Elliptical Galaxies and the ICM [PDF]
Astrophysics and Space Science, 2003 4 pages, 2 figures, to appear in the ''Proceedings of The evolution of galaxies III.
Pipino, Antonio, Matteucci, Francesca
openaire +2 more sources
Chemical Evolution History of MaNGA Galaxies
The Astrophysical Journal, 2022 Abstract We show the results of a study using the spectral synthesis technique study for the full MaNGA sample showing their chemical enrichment history (ChEH) as well as the evolution of the stellar mass–metallicity relation (MZR) over cosmic time.
Artemi Camps-Fariña +10 more
openaire +3 more sources
A High-precision Survey of the D/H Ratio in the Nearby Interstellar Medium
The Astrophysical Journal, 2023 We present high signal-to-noise ratio measurements of the H i Ly α absorption line toward 16 Galactic targets that are at distances between approximately 190 and 2200 pc, all beyond the wall of the Local Bubble.
Scott D. Friedman +6 more
doaj +1 more source
Stellar populations in gas-rich galaxy mergers I. Dependence on star formation history
, 1998 We investigate the nature of stellar populations of major galaxy mergers between late-type spirals considerably abundant in interstellar medium by performing numerical simulations designed to solve both the dynamical and chemical evolution in a self ...
Bekki, Kenji, Shioya, Yasuhiro
core +1 more source
The Astrophysical Journal, 2023 Growing evidence in support of a connection between active galactic nuclei (AGN) activity and the ram pressure stripping (RPS) phenomenon has been found both observationally and theoretically in the past decades.
Giorgia Peluso +7 more
doaj +1 more source
Chemical evolution of the Small Magellanic Cloud based on planetary nebulae [PDF]
, 2007 We investigate the chemical evolution of the Small Magellanic Cloud (SMC) based on abundance data of planetary nebulae (PNe). The main goal is to investigate the time evolution of the oxygen abundance in this galaxy by deriving an age-metallicity ...
Allende-Prieto +53 more
core +1 more source
The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy [PDF]
, 2009 We present an abundance analysis based on high resolution spectra of 8 stars selected to span the full range in metallicity in the Draco dwarf spheroidal galaxy. We find [Fe/H] for the sample stars ranges from -1.5 to -3.0 dex.
Cohen, Judith G., Huang, Wenjin
core +2 more sources