2025RAA....25b5020L

Query : 2025RAA....25b5020L

2025RAA....25b5020L - Research in Astron. and astroph., 25, part no 2, 5020 (2025/February-0)

Core Mass Function in View of Fractal and Turbulent Filaments and Fibers.

LIU X., LIU T., MAI X., CHENG Y., JIAO S., JIAO W., LIU H. and ZHANG S.

Abstract (from CDS):

We propose that the core mass function (CMF) can be driven by filament fragmentation. To model a star-forming system of filaments and fibers, we develop a fractal and turbulent tree with a fractal dimension of 2 and a Larson's law exponent (β) of 0.5. The fragmentation driven by convergent flows along the splines of the fractal tree yields a Kroupa-IMF-like CMF that can be divided into three power-law segments with exponents α = -0.5, -1.5, and -2, respectively. The turnover masses of the derived CMF are approximately four times those of the Kroupa IMF, corresponding to a star formation efficiency of 0.25. Adopting β = 1/3, which leads to fractional Brownian motion along the filament, may explain a steeper CMF at the high-mass end, with α = -3.33 close to that of the Salpeter IMF. We suggest that the fibers of the tree are basic building blocks of star formation, with similar properties across different clouds, establishing a common density threshold for star formation and leading to a universal CMF.

Abstract Copyright: © 2025. National Astronomical Observatories, CAS and IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.

Journal keyword(s): stars: formation - stars: kinematics and dynamics - turbulence - stars: luminosity function, mass function - ISM: clouds

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Aql Region reg 18 31.1 -02 10           ~ 456 0

Query : 2025RAA....25b5020L

Basic data :
NAME Aql Region -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		18 31 07.2 -02 09 36 [ ] E 2023ApJS..264....7C
FK4 coord. (ep=B1950 eq=1950) : 		18 28 30.9 -02 11 46 [ ]
Gal coord. (ep=J2000) : 		028.6866 +03.5291 [ ]
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Hierarchy : number of linked objects
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Identifiers (4) :
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NAME Aquila Region NAME Aql Region NAME Aquila NAME Aquila Cloud

References (456 between 1850 and 2026) (Total 456)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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