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Some statistical aspects of estimating the local red clump absolute magnitude
- Source :
- Monthly Notices of the Royal Astronomical Society. 343:241-248
- Publication Year :
- 2003
- Publisher :
- Oxford University Press (OUP), 2003.
-
Abstract
- Various statistical issues regarding estimation of the mean absolute magnitude of the red clump stars, using Hipparcos parallaxes, are discussed. The problem is put in the broader context of estimation of the functional dependence of the absolute magnitude on colour of local giant stars, as derived from Hipparcos observations. The methods used include calculation of the medians and modes of the absolute magnitudes of stars binned in narrow colour intervals. The modes are determined by kernel density estimation of the underlying distribution of absolute magnitudes. A weighted least trimmed squares procedure, which allows the incorporation of all information - including negative parallaxes - is described in detail. Standard errors are estimated by bootstrapping. Results are in good agreement with those of Paczynski & Stanek.
- Subjects :
- Absolute magnitude
Physics
Kernel density estimation
Astronomy and Astrophysics
Context (language use)
Least trimmed squares
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Giant star
Stars
Space and Planetary Science
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Red clump
Astrophysics::Galaxy Astrophysics
Bootstrapping (statistics)
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 343
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi...........596781549d6dafe9bee1bfb9aa5ed927