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Spectrophotometric analysis of magnetic white dwarf: I. Hydrogen-rich compositions

We present a homogeneous analysis of all DA stars labelled as magnetic in the Montreal White Dwarf Database. Our sample is restricted to almost all known magnetic white dwarf showing clear sign of splitting (B ≳ 1-2 MG) that have parallax measurements from the second Gaia data release, photometric d...

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Hauptverfasser: François, Hardy von (VerfasserIn) , Dufour, Patrick (VerfasserIn) , Jordan, Stefan (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 23 January 2023
In: Monthly notices of the Royal Astronomical Society
Year: 2023, Jahrgang: 520, Heft: 4, Pages: 6111-6134
ISSN:1365-2966
DOI:10.1093/mnras/stad196
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stad196
Verlag, lizenzpflichtig, Volltext: https://academic.oup.com/mnras/article/520/4/6111/6998583
Volltext
Verfasserangaben:François Hardy, Patrick Dufour, and Stefan Jordan

MARC

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520 |a We present a homogeneous analysis of all DA stars labelled as magnetic in the Montreal White Dwarf Database. Our sample is restricted to almost all known magnetic white dwarf showing clear sign of splitting (B ≳ 1-2 MG) that have parallax measurements from the second Gaia data release, photometric data from diverse surveys and spectroscopic data from Sloan Digital Sky Survey or archival data from the Montreal group. We determine the atmospheric parameters (effective temperature, surface gravity, and magnetic field strength/geometry) of all objects using state-of-the-art model atmosphere/magnetic synthetic spectra, as well as reclassify many objects that were prematurely labelled as potentially magnetic. Finally, we discuss the atmospheric parameters/field properties distribution as well as the implication on our understanding of magnetic white dwarfs origin and evolution. 
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