The Impact of Binaries on the Stellar Initial Mass Function
The Impact of Binaries on the Stellar Initial Mass Function
复制标题
双星对恒星初始质量函数的影响
DOI:
10.1017/9781108553070.017
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
T. Jeřábková
中科院分区:
文献类型:
--
作者:
P. Kroupa;T. Jeřábková
(abridged) The stellar initial mass function (IMF) can be conveniently represented as a canonical two-part power law function and is largely invariant for star formation regions evident in the Local Group of galaxies. The IMF is a hilfskonstrukt. It is a mathematical formulation of an idealised population of stars formed together in one star formation event. The nature of the IMF (is it a probability density or an optimal sampling distribution function?) is raised. Binary stars, if unresolved, have a very significant influence at low stellar masses. Especially important is to take care of the changing binary fraction as a result of stellar-dynamical evolution of the embedded clusters which spawn the field populations of galaxies, given that the binary fraction at birth is very high and independent of primary-star mass. The high multiplicity fraction amongst massive stars leads to a substantial fraction of these being ejected out of their birth clusters and to massive stars merging. This explains the top-lightness of the IMF in star clusters in M31. In close binaries also the masses of the components can be changed due to mass transfer. A large amount of evidence points to the IMF becoming top-heavy with decreasing metallicity and above a star-formation-rate density of about 0.1 Msun/(pc^3 yr) of the cluster-forming cloud core. This is also indicated through the observed supernova rates in star-bursting galaxies. At the same time, the IMF may be bottom light at low metallicity and bottom-heavy at high metallicity, possibly accounting for the results on elliptical galaxies and ultra-faint dwarf galaxies, respectively.
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DOI:
10.1111/j.1365-2966.2012.20767.x
发表时间:
2012-02
影响因子:
4.8
作者:
M. Marks;P. Kroupa;J. Dabringhausen;M. Pawlowski
通讯作者:
M. Marks;P. Kroupa;J. Dabringhausen;M. Pawlowski
影响因子:
6.5
作者:
Nina Brinkmann;S. Banerjee;Bhawna Motwani;P. Kroupa
通讯作者:
Nina Brinkmann;S. Banerjee;Bhawna Motwani;P. Kroupa
DOI:
10.1088/0004-637x/747/1/72
发表时间:
2011-10
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Dabringhausen;P. Kroupa;J. Pflamm-Altenburg;S. Mieske
通讯作者:
J. Dabringhausen;P. Kroupa;J. Pflamm-Altenburg;S. Mieske
影响因子:
56.9
作者:
F. Schneider;H. Sana;C. Evans;J. Bestenlehner;J. Bestenlehner;N. Castro;L. Fossati;G. Gräfener;N. Langer;O. Ramírez-Agudelo;C. Sabín-Sanjulián;S. Simón-Díaz;S. Simón-Díaz;F. Tramper;P. Crowther;A. D. Koter;A. D. Koter;S. D. Mink;P. Dufton;María García;M. Gieles;V. Hénault-Brunet;V. Hénault-Brunet;A. Herrero;A. Herrero;R. Izzard;V. Kalari;D. Lennon;J. M. Apellániz;N. Markova;F. Najarro;P. Podsiadlowski;P. Podsiadlowski;J. Puls;W. Taylor;J. V. Loon;J. Vink;C. Norman;C. Norman
通讯作者:
F. Schneider;H. Sana;C. Evans;J. Bestenlehner;J. Bestenlehner;N. Castro;L. Fossati;G. Gräfener;N. Langer;O. Ramírez-Agudelo;C. Sabín-Sanjulián;S. Simón-Díaz;S. Simón-Díaz;F. Tramper;P. Crowther;A. D. Koter;A. D. Koter;S. D. Mink;P. Dufton;María García;M. Gieles;V. Hénault-Brunet;V. Hénault-Brunet;A. Herrero;A. Herrero;R. Izzard;V. Kalari;D. Lennon;J. M. Apellániz;N. Markova;F. Najarro;P. Podsiadlowski;P. Podsiadlowski;J. Puls;W. Taylor;J. V. Loon;J. Vink;C. Norman;C. Norman
影响因子:
4.8
作者:
Zonoozi;Kroupa;Banerjee;Baumgardt
通讯作者:
Baumgardt