# The Gaia white dwarf revolution

**Authors:** Pier-Emmanuel Tremblay, Antoine Bédard, Mairi W. O'Brien, James Munday, Abbigail K. Elms, Nicola Pietro Gentillo Fusillo, Snehalata Sahu  
**arXiv:** [2402.14960](https://arxiv.org/abs/2402.14960)  
**Date:** 2024-02-22  
**Summary page:** https://www.summarizepaper.com/en/paper/2402.14960v3/

## Key points

- The Gaia space mission has revolutionized white dwarf research by providing crucial data that transformed our understanding of these stellar remnants.
- Gaia identified 260,000 white dwarfs with Data Release 2 in 2018, and subsequent releases increased this number to over 355,000.
- More than 400 studies have utilized Gaia data for white dwarf research, establishing it as a fundamental resource for identifying white dwarfs and determining their fundamental parameters.
- Gaia's photometry has been extensively used in white dwarf surveys, significantly advancing our knowledge of these stellar remnants.
- Recent discoveries based on Gaia data include findings related to white dwarf mergers, exotic compact binaries, and evolved planetary systems.
- The Gaia space mission continues to be a valuable resource for further exploration in the field of white dwarf research.

## Summary

The Gaia space mission has revolutionized white dwarf research by providing crucial data that has transformed our understanding of these stellar remnants. Prior to Gaia, the identification of white dwarfs was hindered by the lack of trigonometric parallaxes. However, with the release of Data Release 2 in 2018, Gaia provided the first unbiased colour-absolute magnitude diagram of the local stellar population, leading to the identification of 260,000 white dwarfs. Subsequent releases, such as Data Release 3, increased this number to over 355,000. Since then, more than 400 studies have utilized Gaia data for white dwarf research, establishing it as a fundamental resource for identifying white dwarfs and determining their fundamental parameters. Additionally, Gaia's photometry has been extensively used in white dwarf surveys. The routine reliance on Gaia parallaxes and photometry has significantly advanced our knowledge of white dwarfs. Furthermore, recent discoveries firmly grounded in Gaia data include findings related to white dwarf mergers, exotic compact binaries, and evolved planetary systems. These discoveries highlight the importance of Gaia in uncovering new phenomena within the realm of white dwarf research. Overall, the Gaia space mission has played a pivotal role in transforming our understanding of white dwarfs and continues to be a valuable resource for further exploration in this field.