The Astrophysical Journal, 2023 The stellar initial mass function (IMF) is expressed by ϕ ( m ) ∝ m ^− ^α with the slope α , and known as a poorly constrained but very important function in studies of star and galaxy formation. There are no sensible observational constraints on the IMF
Shohei Aoyama +2 more
doaj +1 more source
Diffuse Neutrino Flux Based on the Rates of Core-collapse Supernovae and Black Hole Formation Deduced from a Novel Galactic Chemical Evolution Model [PDF]
Astrophysical Journal, 2023 Fluxes of the diffuse supernova neutrino background (DSNB) are calculated based on a new modeling of galactic chemical evolution, where a variable stellar initial mass function (IMF), depending on the galaxy type, is introduced and black hole (BH ...
Y. Ashida, K. Nakazato, T. Tsujimoto
semanticscholar +1 more source
Which Component of Solar Magnetic Field Drives the Evolution of Interplanetary Magnetic Field over the Solar Cycle? [PDF]
Astrophysical Journal, 2023 The solar magnetic structure changes over the solar cycle. It has a dipole structure during solar minimum, where the open flux extends mainly from the polar regions into the interplanetary space.
Minami Yoshida, T. Shimizu, S. Toriumi
semanticscholar +1 more source
Downsizing revised: Star formation timescales for elliptical galaxies with an environment-dependent IMF and a number of SNIa [PDF]
Astronomy & Astrophysics, 2021 Previous studies of the stellar mean metallicity and [Mg / Fe] values of massive elliptical (E) galaxies suggest that their stars were formed over a very short timescale that cannot be reconciled with estimates from stellar population synthesis (SPS ...
Zhiqiang Yan, T. Jeřábková, P. Kroupa
semanticscholar +1 more source
The influence of a top-heavy integrated galactic IMF and dust on the chemical evolution of high-redshift starbursts [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We study the effects of the integrated galactic initial mass function (IGIMF) and dust evolution on the abundance patterns of high redshift starburst galaxies.
M. Palla +5 more
semanticscholar +1 more source
CME Magnetic Structure and IMF Preconditioning Affecting SEP Transport [PDF]
Space Weather, 2021 Coronal mass ejections (CMEs) and solar energetic particles (SEPs) are two phenomena that can cause severe space weather effects throughout the heliosphere.
E. Palmerio +17 more
semanticscholar +1 more source
Hα morphologies of star clusters in 16 LEGUS galaxies: Constraints on HII region evolution timescales [PDF]
Monthly notices of the Royal Astronomical Society, 2022 The analysis of star cluster ages in tandem with the morphology of their HII regions can provide insight into the processes that clear a cluster’s natal gas, as well as the accuracy of cluster ages and dust reddening derived from Spectral Energy ...
S. Hannon +16 more
semanticscholar +1 more source
The evolution of CNO isotopes: a new window on cosmic star formation history and the stellar IMF in the age of ALMA [PDF]
, 2017 We use state-of-the-art chemical models to track the cosmic evolution of the CNO isotopes in the interstellar medium of galaxies, yielding powerful constraints on their stellar initial mass function (IMF). We re-assess the relative roles of massive stars,
D. Romano +9 more
semanticscholar +1 more source
Dynamical evolution of star clusters with top-heavy IMF [PDF]
Proceedings of the International Astronomical Union, 2019 AbstractSeveral observational and theoretical studies suggest that the initial mass function (IMF) slope for massive stars in globular clusters (GCs) depends on the initial cloud density and metallicity, such that the IMF becomes increasingly top-heavy with decreasing metallicity and increasing the gas density of the forming object.
Hosein Haghi +3 more
openaire +2 more sources
The Stellar IMF of Galactic Clusters and Its Evolution [PDF]
, 2007 We show that one can obtain a good fit to the measured main sequence mass function (MF) of a large sample of Galactic clusters (young and old) with a tapered Salpeter power law distribution function with an exponential truncation. The average value of the power law index is very close to Salpeter (~2.3), whereas the characteristic mass is in the range ...
De Marchi, Guido +2 more
openaire +2 more sources