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
Transition of the initial mass function in the metal-poor environments [PDF]
Monthly notices of the Royal Astronomical Society, 2021 We study star cluster formation in a low-metallicity environment using three dimensional hydrodynamic simulations. Starting from a turbulent cloud core, we follow the formation and growth of protostellar systems with different metallicities ranging ...
Sunmyon Chon, K. Omukai, R. Schneider
semanticscholar +1 more source
Testing the role of environmental effects on the initial mass function of low-mass stars [PDF]
Monthly notices of the Royal Astronomical Society, 2021 In the star-formation process, the vital impact of environmental factors such as feedback from massive stars and stellar density on the form of the initial mass function (IMF) at the low-mass end is yet to be understood.
Belinda Damian +9 more
semanticscholar +1 more source
The Astrophysical Journal Letters, 2023 We use recent microlensing observations toward the central bulge of the Galaxy to probe the overall stellar plus brown dwarf initial mass function (IMF) in these regions well within the brown dwarf domain. We find that the IMF is consistent with the same
Gilles Chabrier, Romain Lenoble
doaj +1 more source
The Initial Mass Function and Other Stellar Properties Across the Core of the Hydra I Cluster
The Astrophysical Journal, 2023 The Hydra I cluster offers an excellent opportunity to study and compare the relic old stellar populations in the core of its two brightest galaxies. In addition, the differing kinematics of the two galaxies allows a test of the local validity of general
Ilaria Lonoce +2 more
doaj +1 more source
The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems [PDF]
Science, 2002 The distribution of stellar masses that form in one star formation event in a given volume of space is called the initial mass function (IMF). The IMF has been estimated from low-mass brown dwarfs to very massive stars.
P. Kroupa
semanticscholar +1 more source