censor_Be {astrodatR}

Stellar abundances and planets

Description

This data set allows investigation of whether the presence or absence of a giant planet is correlated with the level of lithium and beryllium in the photosphere of the host star. The dataset consists of 3 measured variables for 68 solar-type stars, roughly half with and half without detected planets (Santos et al. 2002). Some missing data are present. This dataset is useful for survival analysis involving correlation of singly- and doubly-censored data. Note that astronomical data are typically left-censored. Further description and references for the dataset are given in Appendix C.4 of Feigelson & Babu (2012).

Usage

censor_Be

Format

A table containing 68 rows and 8 columns with header row. Column 2 is a sample indicator (1 = star with planet; 2 = star without planet). Columns 4 and 7 are censoring indicators (1 = detected; 0 = undetected, left-censored).

Source

Feigelson and Babu (2012), Santos et al. (2002)

References

Feigelson, E. D. and Babu, G. J. (2012) Modern Statistical Methods for Astronomy with R Applications, Cambridge UK:Cambridge University Press

Santos, N. C., Garcia Lopez, R. J., Israelian, G., Mayor, M., Rebolo, R., Garcia-Gil, A., Perrez de Taoro, M. R. & Randich, S. (2002) Beryllium abundances in stars hosting giant planets, Astropnomy & Astrophysics, 386, 1028-1-38