Catalog of magnetic white dwarfs with hydrogen dominated atmospheres
L. L. Amorim, S. O. Kepler, Baybars K\"ulebi, S. Jordan, A. D., Romero

TL;DR
This study provides a comprehensive catalog of 804 hydrogen-rich white dwarfs with measured magnetic fields, revealing correlations between magnetic strength, mass, and temperature, and suggesting magnetic field amplification during cooling.
Contribution
It presents the largest dataset of magnetic field measurements in hydrogen-rich white dwarfs, using spectral fitting to analyze their magnetic properties.
Findings
Magnetic white dwarfs tend to have higher masses than non-magnetic ones.
Magnetic fields are more prevalent in cooler white dwarfs.
Higher magnetic fields correlate with higher masses and lower temperatures, indicating ongoing crystallization.
Abstract
White dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other stellar features, we determined the magnetic field strength for a total of 804 hydrogen-rich white dwarfs of which 287 are not in the literature. We fitted the spectra observed with the Sloan Digital Sky Survey using atmospheric models that consider the Zeeman effect due to the magnetic field at each point in the stellar disk. Comparing magnetic and non-magnetic WDs, the literature already shows that the magnetic ones have on average higher mass than the non-magnetic. In addition to that, magnetic fields are more common in cooler WDs than in hotter WDs. In consonance, we found that those with higher magnetic field strengths tend to have higher masses,…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astro and Planetary Science · Solar and Space Plasma Dynamics
