The information of the Milky Way From Two Micron All Sky Survey whole sky star count: The luminosity function

Chan Kao Chang, Chung Ming Ko, Ting Hung Peng

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The logarithmic differential star count of the Two Micron All Sky Survey in Ks band can be well approximated by a single power-law luminosity function. With a fiducial Galactic structure, we measure the luminosity function for the entire Milky Way. The distribution of the power-law index is roughly isotropic and shows no obvious trend with the Galactic latitude. The value for the power-law index, the bright and the faint ends of the luminosity function are 1.85 ± 0.035, Ks = -7.86 ± 0.60 mag, and Ks = 6.88 ± 0.66 mag, respectively. Our result strongly supports the notion of a universal luminosity function in our Galaxy. We also find that the luminosity function of LMC/SMC is similar to that of the Milky Way.

Original languageEnglish
Pages (from-to)182-188
Number of pages7
JournalAstrophysical Journal
Volume724
Issue number1
DOIs
StatePublished - 20 Nov 2010

Keywords

  • Galaxies: luminosity function, mass function
  • Galaxy: fundamental parameters
  • Galaxy: general
  • Galaxy: stellar content
  • Galaxy: structure
  • Infrared: stars

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