Suppression of cooling by strong magnetic fields in white dwarf stars

G. Valyavin (), D. Shulyak, G. A. Wade, K. Antonyuk, S. V. Zharikov, G. A. Galazutdinov, S. Plachinda, S. Bagnulo, L. Fox Machado, M. Alvarez, D. M. Clark, J. M. Lopez, D. Hiriart, Inwoo Han, Young-Beom Jeon, C. Zurita, R. Mujica, T. Burlakova, T. Szeifert and A. Burenkov
Additional contact information
G. Valyavin: Special Astrophysical Observatory of Russian Academy of Science, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic 369167, Russia
D. Shulyak: Institute for Astrophysics, Georg-August-University, Friedrich-Hund-Platz 1, D-37077, Göttingen, Germany
G. A. Wade: Royal Military College of Canada, PO Box 17000 Station Forces, Kingston, Ontario, K7K 7B4, Canada
K. Antonyuk: Crimean Astrophysical Observatory, Nauchny, Crimea 98409, Ukraine
S. V. Zharikov: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
G. A. Galazutdinov: Instituto de Astronomía, Universidad Catolica del Norte, Avenida Angamos 0610, Antofagasta, Chile
S. Plachinda: Crimean Astrophysical Observatory, Nauchny, Crimea 98409, Ukraine
S. Bagnulo: Armagh Observatory, College Hill, Armagh BT61 9DG, UK
L. Fox Machado: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
M. Alvarez: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
D. M. Clark: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
J. M. Lopez: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
D. Hiriart: Instituto de Astronomía, Observatorio Astronómico Nacional San Pedro Martir (SPM), Universidad Nacional Autónoma de México, 22860 Ensenada, Baja California, Mexico
Inwoo Han: Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon 305-348, South Korea
Young-Beom Jeon: Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon 305-348, South Korea
C. Zurita: Instituto de Astrofísica de Canarias, 38200, La Laguna, Tenerife, Spain
R. Mujica: Instituto Nacional de Astrofísica, Óptica y Electróníca, Apartado Postal 51 y 216, 72000 Tonantzintla, Pueblo, Mexico
T. Burlakova: Special Astrophysical Observatory of Russian Academy of Science, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic 369167, Russia
T. Szeifert: European Southern Observatory, Alonso de Córdova 3107, Santiago, Chile
A. Burenkov: Special Astrophysical Observatory of Russian Academy of Science, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic 369167, Russia

Nature, 2014, vol. 515, issue 7525, 88-91

Abstract: Cool white dwarf stars often have mysteriously strong magnetic fields (because their coolness suggests that they are old, and magnetic fields should decline in strength with age) and unexplained brightness variations; here the magnetic field is shown to suppress atmospheric convection, inhibiting cooling evolution and causing dark spots.

Date: 2014
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DOI: 10.1038/nature13836

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