Results 21 to 30 of about 3,387,094 (327)

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

open access: green, 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   +4 more sources

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

open access: green, 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

Probing the Milky Way Stellar and Brown Dwarf Initial Mass Function with Modern Microlensing Observations

open access: yesThe 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

open access: yesThe 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

Constraining the low-mass end of the initial mass function with gravitational lensing [PDF]

open access: green, 2010
The low-mass end of the stellar Initial Mass Function (IMF) is constrained by focusing on the baryon-dominated central regions of strong lensing galaxies. We study in this letter the Einstein Cross (Q2237+0305), a z=0.04 barred galaxy whose bulge acts as
Ignacio Ferreras   +4 more
openalex   +3 more sources

The Formation of Low-Mass Cluster Galaxies and the Universal Initial Galaxy Mass Function [PDF]

open access: green, 2002
Clusters of galaxies have an observed over-density of low-luminosity systems in comparison to the field, although it is not yet agreed whether this effect is the result of initial galaxy mass functions that vary with environment or galaxy evolutionary ...
Christopher J. Conselice
openalex   +3 more sources

Variation of the High-mass Slope of the Stellar Initial Mass Function: Theory Meets Observations

open access: yesThe Astrophysical Journal, 2023
We present observational evidence of a correlation between the high-mass slope of the stellar initial mass function (IMF) in young star clusters and their stellar surface density, σ _* .
Sami Dib
doaj   +1 more source

A Novel Survey for Young Substellar Objects with the W-band Filter. VI. Spectroscopic Census of Substellar Members and the IMF of the σ Orionis Cluster

open access: yesThe Astrophysical Journal, 2023
Low-mass stars and substellar objects are essential in tracing the initial mass function (IMF). We study the nearby young σ Orionis cluster ( d ∼ 408 pc, age ∼ 1.8 Myr) using deep near-infrared (NIR) photometric data in the J , W , and H bands from ...
Belinda Damian   +13 more
doaj   +1 more source

Mapping the core mass function to the initial mass function [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2015
13 pages, 15 figures, accepted by MNRAS on 17 April ...
Guszejnov, Dávid, Hopkins, Philip F.
openaire   +3 more sources

A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function

open access: yesThe Astrophysical Journal Supplement Series, 2023
This work presents and releases a catalog of new photometrically derived physical properties for the ∼10 ^5 most well-measured galaxies in the COSMOS field on the sky.
Vadim Rusakov   +2 more
doaj   +1 more source

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