Results 1 to 10 of about 1,589,274 (291)
New Light on the Initial Mass Function of the Galactic Halo Globular Clusters [PDF]
Mon.Not.Roy.Astron.Soc.363:326-336,2005, 2005 We present new constraints on the initial mass spectrum of the Galactic Old Halo globular clusters. This has remained poorly-known so far, as both an initial power-law mass spectrum and an initial lognormal mass function could have evolved into the presently observed globular cluster mass distribution, making the initial contribution of now lost low ...
G. Parmentier, G. Gilmore
arxiv +3 more sources
Planet Mass Function around M Stars at 1–10 au: A Plethora of Sub-Earth Mass Objects [PDF]
The Astrophysical JournalSmall planets (≲1 M _⊕ ) at intermediate orbital distances (∼1 au) represent an uncharted territory in exoplanetary science. The upcoming microlensing survey by the Nancy Grace Roman Space Telescope will be sensitive to objects as light as Ganymede and ...
Yayaati Chachan, Eve J. Lee
doaj +2 more sources
Identification of a Turnover in the Initial Mass Function of a Young Stellar Cluster Down to 0.5 MJ
The Astrophysical Journal LettersA successful theory of star formation should predict the number of objects as a function of their mass produced through star-forming events. Previous studies in star-forming regions and the solar neighborhood have identified a mass function increasing ...
Matthew De Furio +13 more
doaj +2 more sources
Investigating the effect of massive stars on the dynamical evolution of open clusters, using optimal and random sampling [PDF]
Iranian Journal of Physics Research, 2023 Massive OB stars have an important effect on the dynamical evolution of open star clusters. In the simulation of star clusters, the sampling method to determine the mass function of the cluster affects the number and mass of massive stars. Two methods of
Malihe Rabiee +2 more
doaj +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
Variation of the High-mass Slope of the Stellar Initial Mass Function: Theory Meets Observations
The 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
The 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
The 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
The Astrophysical Journal, 2022 This paper presents improved constraints on the low-mass stellar initial mass function (IMF) of the Boötes I (Boo I) ultrafaint dwarf galaxy, based on our analysis of recent deep imaging from the Hubble Space Telescope.
Carrie Filion +3 more
doaj +1 more source