The Importance of Binaries in Stellar Population Synthesis Studies

Abstract

Abstract:

Observations show that most stars are in binaries, which indicates that binaries should be taken into account in stellar population synthesis studies. This paper reviews the importance of binaries in the studies of stellar populations. The effects of binaries on the spectral energy distributions, line strength indices, colours, colour-magnitude diagrams, parameter determinations, and star formation histories are discussed. The review shows that binaries are very helpful for the explanations of spectra and colour-magnitude diagrams of galaxies and star clusters, and they also affect the determinations of many important parameters. Therefore, the inclusion of binaries is a natural trend for future stellar population studies.

Key words: binaries, stellar population synthesis, galaxies, star clusters

CLC Number:

P153

LI Zhong-Mu. The Importance of Binaries in Stellar Population Synthesis Studies[J]. J4, 2013, 12(10): 23-26.

References

〔1〕Eggleton P. Evolutionary Processes in Binary and Multiple
Stars〔M〕. Cambridge：Cambridge University Press，2006：
17-253.
〔2〕Salpeter E. The Luminosity Function and Stellar Evolution
〔J〕. Astrophysical Journal，1955，121：161-167.
〔3〕Zhang F H，Han Z W, Li L F，et al. Inclusion of binaries in
evolutionary population synthesis〔J〕. Monthly Notices of
the Royal Astronomical Society，2005，357（3）：1088-1103.
〔4〕Li Z，Han Z W. How Binary Interactions Affect Spectral Stel?
lar Population Synthesis〔J〕.Astrophysical Journal，2008，
685（1）：225-234.
〔5〕Li Z M，Han Z W.Fitting formulae for the effects of binary in?
teractions on lick indices and colors of stellar populations
〔J〕.Research in Astronomy and Astrophysics，2009，9（2）：
191-204.
〔6〕Li Z M，Zhang L Y，Liu J Z. Integrated spectral energy distri?
butions of binary star composite stellar populations〔J〕.
Monthly Notices of the Royal Astronomical Society，2012，
424(2)：874-883.
〔7〕Li Z M，Mao C Y,Chen L, et al. The potential importance of
binary evolution for UV -optical spectral fitting of early -
type galaxies〔J〕.Astrophysical Journal，2013,776（1）:37-62.
〔8〕Li Z M，Mao C Y，Li R H，et al. A binary study of colormag?
nitude diagrams of 12 globular clusters〔J〕.Research in As?
tronomy and Astrophysics，2010，10（2）：135-141.
〔9〕Li Z M, Mao C Y, Chen L,et al. Combined Effects of Bina?
ries and Stellar Rotation on the Color-Magnitude Diagrams
of Intermediate-age Star Clusters〔J〕. Astrophysical Jour?
nal Letters, 2012, 761(2):22-26.
〔10〕Li Z M，Zhang F H，Zhan W H. A Study of Binary Stellar
Population Synthesis of Elliptical Galaxies〔J〕. Chinese
Journal of Astronomy and Astrophysics，2006，6（6）：669-
679.
〔11〕Li Z, Han Z, Zhang F. Potential of colors for determining
age and metallicity of stellar populations〔J〕. Astronomy
and Astrophysics,2007, 464(3): 853-857.
〔12〕Li Z M, Han Z. Colour pairs for constraining the age and
metallicity of stellar populations〔J〕. Monthly Notices of
the Royal Astronomical Society, 2008, 385(3): 1270-1278.
〔13〕Zhang F H，Han Z W，Li L F，et al.The effects of ultraviolet
photometry and binary interactions on photometric redshift
and galaxy morphology〔J〕. Monthly Notices of the Royal
Astronomical Society，2010，408（2）：1283-1306.
〔14〕Hurley J R，Tout C A，Pols O R. Evolution of binary stars
and the effect of tides on binary populations〔J〕.Monthly
Notices of the Royal Astronomical Society，2002，329（4）：
897-928.
〔15〕Eldridge J J, Stanway E R. Spectral population synthesis
including massive binaries〔J〕. Monthly Notices of the
Royal Astronomical Society, 2009, 400（2）：1019-1028.
〔16〕Li Z M，Han Z W. An isochrone data base and a rapid mod?
el for stellar population synthesis〔J〕.Monthly Notices of
the Royal Astronomical Society，2008，387（1）：105-114.
〔17〕Hernández-Pérez F, Bruzual G.Revisiting binary stars in
population synthesis models〔J〕.Monthly Notices of the
Royal Astronomical Society，2013，431（3）：2612- 2621.

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