Magnetic white dwarf stars in the Sloan Digital Sky Survey

By S. O. Kepler, I. Pelisoli, Stefan Jordan, S. Kleinman, B. Kulebi, D. Koester, Viviane Peccanha, B. Castanheira, A. Nitta, J. E. S. Costa and 3 more. 2012

140 citations recorded by the source corpus.

To obtain better statistics on the occurrence of magnetism among white dwarfs, we searched the spectra of the hydrogen atmosphere white dwarf stars (DAs) in the Data Release 7 of the Sloan Digital Sky Survey (SDSS) for Zeeman splittings and estimated the magnetic fields. We found 521 DAs with detectable Zeeman splittings, with fields in the range from around 1 MG to 733 MG, which amounts to 4% of all DAs observed. As the SDSS spectra has low signal-to-noise ratios, we carefully investigated by simulations with theoretical spectra how reliable our detection of magnetic field was.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/cf7f9ce8ab0ad5f08ee00353b7cf5a86ec2afdfb

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In Astronomy and Astrophysics

1. Bing Zhang
2. D. Maoz
3. B. Gänsicke
4. G. Nelemans
5. F. Mannucci
6. S. Toonen
7. D. Koester
8. P.-E. Tremblay

Citations in the corpus

• Magnetic White Dwarfs (2015, background): “Magnetic White Dwarfs 37 The high field group of MWDs differs from the low field group in terms of average mass (see also Kepler et al. 2013).”
• COSMOLOGICAL FAST RADIO BURSTS FROM BINARY WHITE DWARF MERGERS (2013, background): “Observationally, up to 10 % of WDs have been confirmed to be magnetized, and ∼ 1 % of them have a strong magnetic field of B ∼ 108-9 G (e.g., Kawka et al. 2007; Kepler et al. 2013).”
• New white dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 12 (2015, result): “This number is similar to our findings reported for DR7 in Kepler et al. (2013) and DR10 (Kepler et al. 2015).”
• New white dwarf stars in the Sloan Digital Sky Survey Data Release 10 (2014, result): “Similar to those reported for DR7 in Kleinman et al. (2013) and Kepler et al. (2013), when examining each white dwarf candidate spectrum by eye, we found 206 stars with Zeeman splittings indicating magnetic fields above 2 MG — the limit below which we cannot identify since the line splitting is too…”
• AGaiaData Release 2 catalogue of white dwarfs and a comparison with SDSS (2018, background): “…point in searching for rare sub-types of white dwarfs like: magnetic white dwarfs (Gänsicke et al. 2002; Schmidt et al. 2003; Külebi et al. 2009; Kepler et al. 2013; Hollands et al. 2015), pulsating stars (Castanheira et al. 2004; Greiss et al. 2014; Gentile Fusillo et al. 2016), white dwarfs…”
• Observational Clues to the Progenitors of Type Ia Supernovae (2013, background): “While magnetic WDs tend to be significantly more massive than normal WDs (e.g. Kepler et al. 2013), they rotate just as slowly (Kawaler 3The analysis naturally gives the specific merger rate per WD, i.e. the reciprocal of the mean time until merger.”