2012/04/05 by Carl Melis, P. Dufour, Jay Farihi +10 · 2 citations
Chemistry · Physics and Astronomy · #Astro and Planetary Science #Astrobiology #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Atmosphere (unit) #Chemistry #Chondrite #Parent body #Physics #Spectroscopy #Stars #Stellar, planetary, and galactic studies #White dwarf #astro-ph.SR
paper · pdf · doi:10.1088/2041-8205/751/1/l4
16 pages, 2 figures, 3 tables. Accepted for publication in ApJ Letters
arxiv created 2012/04/05 · openalex publication_date 2012/04/30 · arxiv updated 2015/06/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present new spectroscopic observations of the polluted, dusty, helium-dominated atmosphere white dwarf star HE 1349−2305. Optical spectroscopy reveals weak Ca ii infrared triplet emission indicating that metallic gas debris orbits and is accreted by the white dwarf. Atmospheric abundances are measured for magnesium and silicon while upper limits for iron and oxygen are derived from the available optical spectroscopy. HE 1349−2305 is the first gas disk-hosting white dwarf star identified among previously known polluted white dwarfs. Further characterization of the parent body polluting this star will require ultraviolet spectroscopy.