2014MNRAS.439.3420M


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET02:41:28

2014MNRAS.439.3420M - Mon. Not. R. Astron. Soc., 439, 3420-3438 (2014/April-3)

Star cluster formation in turbulent, magnetized dense clumps with radiative and outflow feedback.

MYERS A.T., KLEIN R.I., KRUMHOLZ M.R. and McKEE C.F.

Abstract (from CDS):

We present three orion simulations of star cluster formation in a 1000M, turbulent molecular cloud clump, including the effects of radiative transfer, protostellar outflows, and magnetic fields. Our simulations all use self-consistent turbulent initial conditions and vary the mean mass-to-flux ratio relative to the critical value over µΦ = 2,µΦ = 10, and µΦ = ∞ to gauge the influence of magnetic fields on star cluster formation. We find, in good agreement with previous studies, that magnetic fields corresponding to µΦ = 2 lower the star formation rate by a factor of ~2.4 and reduce the amount of fragmentation by a factor of ~2 relative to the zero-field case. We also find that the field increases the characteristic sink particle mass, again by a factor of ~2.4. The magnetic field also increases the degree of clustering in our simulations, such that the maximum stellar densities in the µΦ = 2 case are higher than the others by again a factor of ~2. This clustering tends to encourage the formation of multiple systems, which are more common in the rad-MHD runs than the rad-hydro run. The companion frequency in our simulations is consistent with observations of multiplicity in Class I sources, particularly for the µΦ = 2 case. Finally, we find evidence of primordial mass segregation in our simulations reminiscent of that observed in star clusters like the Orion Nebula Cluster.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): magnetic fields - radiative transfer - turbulence - stars: formation - stars: luminosity function, mass function - stars: protostars

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1983 Cl* 05 27 44 -68 59.1           ~ 51 0
2 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1920 1
3 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1262 1
4 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1438 1
5 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 639 2
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2952 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-02:41:28

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