2013MNRAS.434...84W

Query : 2013MNRAS.434...84W

2013MNRAS.434...84W - Mon. Not. R. Astron. Soc., 434, 84-101 (2013/September-1)

The mmax-mecl relation, the IMF and IGIMF: probabilistically sampled functions.

WEIDNER C., KROUPA P. and PFLAMM-ALTENBURG J.

Abstract (from CDS):

We introduce a new method to measure the dispersion of mmax values of star clusters and show that the observed sample of mmax is inconsistent with random sampling from a universal stellar initial mass function (IMF) at a 99.9 per cent confidence level. The scatter seen in the mmax-Mecl data can be mainly (76 per cent) understood as being the result of observational uncertainties only. The scatter of mmax values at a given Mecl is consistent with mostly being measurement uncertainties such that the true (physical) scatter may be very small. Additionally, new data on the local star-formation regions Taurus-Auriga and L1641 in Orion make stochastically formed stellar populations rather unlikely. The data are however consistent with the local integrated galactic stellar initial mass function theory according to which a stellar population is a sum of individual star-forming events each of which is described by well-defined physical laws. Randomly sampled IMFs and henceforth scale-free star formation seems to be in contradiction to observed reality.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: formation - stars: luminosity function, mass function - open clusters and associations: general - galaxies: stellar content

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 12

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Number of rows : 12
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 Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
5 LDN 1641 MoC 05 39.0 -07 00           ~ 502 0
6 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
7 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
8 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
9 Cl Danks 1 OpC 13 12 29.0 -62 41 56           ~ 80 0
10 Cl Danks 2 OpC 13 12 53.3 -62 40 52           ~ 73 0
11 NAME G305 Complex SFR 13 13 -62.7           ~ 72 0
12 Lupus 3 SFR 16 09.6 -39 03           ~ 348 0

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