stars: stars data

In mrfDepth: Depth Measures in Multivariate, Regression and Functional Settings

stars data

Description

Data corresponding to a Hertzsprung-Russel diagram of the star cluster CYG OB1 containing 47 stars in the direction of Cygnus. A typical Hertzsprung-Russel diagram shows the logarithm of the temperature in reverse order from high to low.

The data has been taken from Humphreys (1978) by C. Doom who calibrated them according to Vansina and De Greve (1982).

Usage

data(stars)

Format

A data frame containing the following variables:

LogTemp

Logarithm of the effective temperature at the star's surface.

LogLight

Logarithm of a star's light intensity.

Source

Humphreys R.M. (1978). Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the milky way. Astrophysics Journal Supplementary Series, 38, 309–350.

References

Vansima F., De Greve J.P. (1982). Close binary systems before and after mass transfer. Astrophysics and Space Science, 87, 377–401.

Rousseeuw P.J., Leroy A. (1987). Robust Regression and Outlier Detection. New York: Wiley.

Hand D.J., Daly F., Lunn A., McConway A. (1994). A Handbook of Small Data Sets. Londen: Chapman and Hall, dataset 367.

Examples

data(stars)
plot(stars, xlim = rev(range(stars[,1])))

mrfDepth documentation built on May 29, 2024, 5:04 a.m.