Results 21 to 30 of about 3,974,322 (270)

Initial mass function of planetesimals formed by the streaming instability [PDF]

open access: yes, 2016
The streaming instability is a mechanism to concentrate solid particles into overdense filaments that undergo gravitational collapse and form planetesimals.
Urs Schafer, Chao-Chin Yang, A. Johansen
semanticscholar   +3 more sources

The Origin of the Initial Mass Function [PDF]

open access: yes, 2006
PPV conference paper, 16 pages, 11 ...
Bonnell, Ian A.   +2 more
openaire   +3 more sources

The Stellar Initial Mass Function at the Epoch of Reionization [PDF]

open access: yesThe 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.
Dave R.   +3 more
openaire   +8 more sources

The bimodal initial mass function in the Orion Nebula Cloud [PDF]

open access: yes, 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.
H. Drass   +7 more
semanticscholar   +3 more sources

The Local Stellar Initial Mass Function

open access: green, 2000
This contribution describes the difficult task of inferring the IMF from local star-count data, by discussing the mass-luminosity relation, unresolved binary, triple and quadruple systems, abundance and age spreads and Galactic structure, all of which must be accounted for properly for the results to be meaningful.
Pavel Kroupa
openalex   +4 more sources

Converging on the Initial Mass Function of Stars

open access: yesJournal of Physics: Conference Series, 2017
Understanding the origin of stellar masses—the initial mass function (IMF)— remains one of the most challenging problems in astrophysics. The IMF is a key ingredient for simulations of galaxy formation and evolution, and is used to calibrate star ...
C. Federrath, M. Krumholz, P. Hopkins
semanticscholar   +5 more sources

The Origin of The Stellar Initial Mass Function

open access: green, 2000
Observations and theories of the stellar initial mass function are reviewed. The universality and large total mass range of the power law portion of the IMF suggest a connection between stellar mass and cloud structure. The fractal patterns and formation times of young clusters suggest a further connection to turbulence.
Bruce G. Elmegreen
openalex   +4 more sources

On the Initial Mass Function of Population III Stars [PDF]

open access: bronze, 2001
The collapse and fragmentation of filamentary primordial gas clouds are explored using 1D and 2D hydrodynamical simulations coupled with the nonequilibrium processes of H2 formation.
Fumitaka Nakamura, Masayuki Umemura
openalex   +3 more sources

Evidence for a bottom-light initial mass function in massive star clusters [PDF]

open access: yesMonthly 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

The Initial Mass Function of Low-Mass Stars and Brown Dwarfs in Taurus [PDF]

open access: bronze, 2000
By combining deep optical imaging and infrared spectroscopy with data from the Two-Micron All-Sky Survey (2MASS) and from previous studies (e.g., Briceno et al.), I have measured the Initial Mass Function (IMF) for a reddening-limited sample in four ...
K. L. Luhman
openalex   +3 more sources

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