On the variation of the Initial Mass Function [PDF]
, 2000 (shortened) In this contribution an average or Galactic-field IMF is defined, stressing that there is evidence for a change in the power-law index at only two masses: near 0.5 Msun and 0.08 Msun.
Kroupa, Pavel
core +4 more sources
The fragmentation properties of massive star-forming regions in 30Dor-10 at 2000 au resolution [PDF]
Nature CommunicationsThe fragmentation properties of parsec- scale clumps play a fundamental role in shaping the dense gas condensations known as cores, the immediate progenitor of stars.
Alessio Traficante +11 more
doaj +2 more sources
The Initial Mass Function Based on the Full-sky 20 pc Census of ∼3600 Stars and Brown Dwarfs
The Astrophysical Journal Supplement SeriesA complete accounting of nearby objects—from the highest-mass white dwarf progenitors down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of trigonometric parallax determinations from Gaia, ground-based surveys, and Spitzer ...
J. Davy Kirkpatrick +85 more
doaj +2 more sources
The bimodal initial mass function in the Orion Nebula Cloud [PDF]
, 2016 Due to its youth, proximity and richness the Orion Nebula Cloud (ONC) is an ideal testbed to obtain a comprehensive view on the Initial Mass Function (IMF) down to the planetary mass regime.
Bayo, A. +7 more
core +2 more sources
Evidence for a bottom-light initial mass function in massive star clusters [PDF]
Monthly notices of the Royal Astronomical Society, 2023 We have determined stellar mass functions of 120 Milky Way globular clusters and massive LMC/SMC star clusters based on a comparison of archival Hubble Space Telescope photometry with a large grid of direct N-body simulations.
H. Baumgardt +3 more
semanticscholar +1 more source
Nebular dominated galaxies: insights into the stellar initial mass function at high redshift [PDF]
Monthly notices of the Royal Astronomical Society, 2023 We identify a low-metallicity (12 + log (O/H) = 7.59) Lyα-emitting galaxy at z = 5.943 with evidence of a strong Balmer jump, arising from nebular continuum.
A. Cameron +5 more
semanticscholar +1 more source
Stellar initial mass function varies with metallicity and time [PDF]
Nature, 2022 A direct star-counting method of about 93,000 M-dwarf stars in the solar neighbourhood indicates a variable stellar initial mass function that depends on both metallicity and stellar age.
Jia-dong Li +6 more
semanticscholar +1 more source
Effects of the environment and feedback physics on the initial mass function of stars in the STARFORGE simulations [PDF]
Monthly notices of the Royal Astronomical Society, 2022 One of the key mysteries of star formation is the origin of the stellar initial mass function (IMF). The IMF is observed to be nearly universal in the Milky Way and its satellites, and significant variations are only inferred in extreme environments ...
D. Guszejnov +5 more
semanticscholar +1 more source
Implications of a Temperature-dependent Initial Mass Function. I. Photometric Template Fitting [PDF]
Astrophysical Journal, 2022 A universal stellar initial mass function (IMF) should not be expected from theoretical models of star formation, but little conclusive observational evidence for a variable IMF has been uncovered.
A. Sneppen +5 more
semanticscholar +1 more source
Impact of the cosmic background radiation on the initial mass function of metal-poor stars [PDF]
Monthly notices of the Royal Astronomical Society, 2022 We study star cluster formation at low metallicities of Z/Z⊙ = 10−4–10−1 using three-dimensional hydrodynamics simulations. Particular emphasis is put on how the stellar mass distribution is affected by the cosmic microwave background radiation (CMB ...
Sunmyon Chon +3 more
semanticscholar +1 more source