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The Stellar Initial Mass Function in The Galactic Center [PDF]
, 2007 Massive stars define the upper limits of the star formation process, dominate the energetics of their local environs, and significantly affect the chemical evolution of galaxies. Their role in starburst galaxies and the early Universe is likely to be important, but we still do not know the maximum mass that a star can possess, i.e.``the upper mass ...
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On the function describing the stellar initial mass function [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We propose a functional form for the IMF, the L_3 IMF, which is a natural heavy-tailed approximation to the log-normal distribution. It is composed of a low-mass power law and a high mass power-law which are smoothly joined together. Three parameters are needed to achieve this.
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The Stellar Initial Mass Function at the Epoch of Reionization [PDF]
The Astrophysical Journal, 2008 I provide estimates of the ultraviolet and visible light luminosity density at z~6 after accounting for the contribution from faint galaxies below the detection limit of deep Hubble and Spitzer surveys. I find the rest-frame V-band luminosity density is a factor of ~2-3 below the ultraviolet luminosity density at z~6.
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Early Enrichment Population Theory at High Redshift
The Astrophysical JournalAn early enrichment population (EEP) has been theorized to produce the observed intracluster medium (ICM) metallicity of galaxy clusters. This population likely existed at high redshifts ( z ∼ 10), relics of which we posit exist today as dwarf galaxies.
Anne E. Blackwell, Joel N. Bregman
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ON THE INITIAL CONDITIONS FOR STAR FORMATION AND THE INITIAL MASS FUNCTION [PDF]
The Astrophysical Journal, 2011 Density probability distribution functions (PDFs) for turbulent self-gravitating clouds should be convolutions of the local log-normal PDF, which depends on the local average density ρave and Mach number , and the PDFs for ρave and , which depend on the overall cloud structure.
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The Initial Mass Function of Stars
, 2006 Observations and theory of the IMF are briefly reviewed. Slight variations have been observed, although they are difficult to prove unambiguously. Most detailed theoretical models reproduce the IMF, but because they use different assumptions and conditions, there is no real convergence of explanations yet.
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The Stellar Initial Mass Function of Early Dark Matter–free Gas Objects
The Astrophysical Journal LettersAmong the remarkable strides made by JWST is the discovery of the earliest star clusters found to date. These have been proposed as early progenitors of globular clusters, which are known to come from the early stages of star formation in the Universe ...
William Lake +8 more
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Direct Evidence for Stellar Initial Mass Function Variation in the Milky Way
The Astrophysical Journal LettersBecause direct measurements require resolved stellar populations, including low-mass stars, determining the stellar initial mass function (IMF) has been a historically difficult problem even within our own Galaxy, and impossible everywhere else.
Charles L. Steinhardt +2 more
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Gauging the Impact of Cosmic-ray Feedback on the Stellar Initial Mass Function
The Astrophysical JournalCosmic rays (CRs) drive ionization and influence gas dynamics in molecular clouds (MCs), potentially impacting the resulting star formation outcomes. Although previous simulations of individual star formation have included methods for CR transport (CRT),
Margot Fitz Axen +3 more
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Impact of Initial Mass Function on the Chemical Evolution of High-redshift Galaxies
The Astrophysical JournalRecent observations by the James Webb Space Telescope (JWST) have found evidence for an invariant relation between stellar mass, metallicity, and star formation rate up to z ∼ 8 and its breakdown at higher redshifts. Understanding the underlying physics
Boyuan Liu +12 more
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