A Theoretical Investigation of He I Line Profiles for the Spectroscopic Analysis of DB White Dwarfs
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arXiv
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866914465048428544 |
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| author | Tremblay, Patrick Bergeron, Pierre Beauchamp, Alain |
| author_facet | Tremblay, Patrick Bergeron, Pierre Beauchamp, Alain |
| contents | We present a comprehensive investigation of He I line profile calculations used in the spectroscopic analyses of DB white dwarfs. Our study includes an in-depth photometric and spectroscopic analysis of all DB white dwarfs in the Data Release 17 of the Sloan Digital Sky Survey, examining the effects of frequency sampling, Doppler broadening, line dissolution, broadening by neutral particles, and 3D hydrodynamical corrections on our results. More importantly, we compare the outcomes obtained from the semi-analytical He I Stark profiles commonly used in DB white dwarf spectroscopic analyses with our recent calculations of Stark-broadened profiles derived from computer simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_10195 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Theoretical Investigation of He I Line Profiles for the Spectroscopic Analysis of DB White Dwarfs Tremblay, Patrick Bergeron, Pierre Beauchamp, Alain Solar and Stellar Astrophysics Atomic Physics We present a comprehensive investigation of He I line profile calculations used in the spectroscopic analyses of DB white dwarfs. Our study includes an in-depth photometric and spectroscopic analysis of all DB white dwarfs in the Data Release 17 of the Sloan Digital Sky Survey, examining the effects of frequency sampling, Doppler broadening, line dissolution, broadening by neutral particles, and 3D hydrodynamical corrections on our results. More importantly, we compare the outcomes obtained from the semi-analytical He I Stark profiles commonly used in DB white dwarf spectroscopic analyses with our recent calculations of Stark-broadened profiles derived from computer simulations. |
| title | A Theoretical Investigation of He I Line Profiles for the Spectroscopic Analysis of DB White Dwarfs |
| topic | Solar and Stellar Astrophysics Atomic Physics |
| url | https://arxiv.org/abs/2604.10195 |