Hostname: page-component-f554764f5-sl7kg Total loading time: 0 Render date: 2025-04-10T19:28:16.572Z Has data issue: false hasContentIssue false
  • English
  • Français

Two delays in white dwarf evolution revealed by Gaia

Published online by Cambridge University Press:  09 October 2020

Sihao Cheng Open the ORCID record for Sihao Cheng [Opens in a new window]
Sihao Cheng*
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD21218, SA email: s.cheng@jhu.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

By comparing two age indicators of high-mass white dwarfs (WDs) derived from Gaia data, two discoveries have been made recently: one is the existence of a cooling anomaly that produces the Q branch structure on the Hertzsprung–Russell diagram, and the other is the existence of high-mass WDs as double-WD merger products. The former poses a challenge for WD cooling models, and the latter has implications on binary evolution and type-Ia supernovae.

Keywords

white dwarfsstars: evolutionstars: kinematicsHertzsprung-Russell diagrammethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 175 - 178
Copyright
© International Astronomical Union 2020

References

Bildsten, L. & Hall, D. M. 2001, Ap. Lett., 549, L219CrossRefGoogle Scholar
Brown, W. R., Kilic, M., Kenyon, S. J., & Gianninas, A. 2016, ApJ, 824, 46CrossRefGoogle Scholar
Cheng, S., Cummings, J., & Ménard, B. 2019a, ApJ, 886, 100CrossRefGoogle Scholar
Cheng, S., Cummings, J., Ménard, B., & Toonen, S. 2019b, arXiv:1910.09558Google Scholar
Dufour, P., Liebert, J., Fontaine, G., & Behara, N. 2007, Nature, 450, 522CrossRefGoogle Scholar
Fontaine, G., Brassard, P., & Bergeron, P. 2001, PASP, 113, 409CrossRefGoogle Scholar
Gaia, Collaboration, Babusiaux, C., van Leeuwen, F., et al. 2018, A&A, 616, A10Google Scholar
Holmberg, J., Nordström, B., & Andersen, J. 2009, A&A, 501, 941Google Scholar
Kawka, A., Vennes, S., & Ferrario, L. 2019, MNRAS Letters, 491, L40Google Scholar
Li, W., Chornock, R., Leaman, J., et al. 2011, MNRAS, 412, 1473CrossRefGoogle Scholar
Maoz, D., Hallakoun, N., & Badenes, C. 2018, MNRAS, 476, 2584CrossRefGoogle Scholar
Mestel, L. 1952, MNRAS, 112, 583CrossRefGoogle Scholar
Temmink, K. D., Toonen, S., Zapartas, E., Justham, S., & Gänsicke, B. T. 2019, arXiv:1910.05335Google Scholar
Tremblay, P.-E., Fontaine, G., Fusillo, N. P. G., et al. 2019, Nature, 565, 202CrossRefGoogle Scholar
Wegg, C. & Phinney, E. S. 2012, MNRAS, 426, 427CrossRefGoogle Scholar