# White Dwarf Stars

## TL;DR

This paper reviews the identification and properties of white dwarf stars, highlighting the significant increase in their known numbers from spectral data, and discusses their magnetic fields and mass distribution.

## Contribution

It provides an extensive analysis of white dwarf stars using Sloan Digital Sky Survey data, significantly expanding the catalog of spectroscopically identified white dwarfs.

## Key findings

- Number of identified white dwarfs increased from 5,000 to 39,000.
- Analysis of magnetic fields and mass distribution of white dwarfs.
- Focus on white dwarfs with log g >= 6.5, excluding Extremely Low Mass types.

## Abstract

White dwarf stars are the final stage of most stars, born single or in multiple systems. We discuss the identification, magnetic fields, and mass distribution for white dwarfs detected from spectra obtained by the Sloan Digital Sky Survey up to Data Release 13 in 2016, which lead to the increase in the number of spectroscopically identified white dwarf stars from 5000 to 39000. This number includes only white dwarf stars with log g >= 6.5 stars, i.e., excluding the Extremely Low Mass white dwarfs, which are necessarily the byproduct of stellar interaction.