Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 852, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aaa3d9
Keywords
circumstellar matter; techniques: spectroscopic; white dwarfs
Categories
Funding
- W.M. Keck Foundation
- National Science Foundation through Astronomy and Astrophysics Research Grant [AST-1313268]
- Keck Northeast Astronomy Consortiums REU program [AST-1005024]
- Leverhulme Trust
- European Research Council under the European Union's Seventh Framework Programme (FP)/ERC [320964]
- STFC [ST/M004546/1, ST/R000476/1, ST/J003344/1, ST/J003344/2, ST/M001377/1, ST/J003344/3, ST/K003453/1, ST/K003453/2, ST/N002695/1, ST/N000048/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J003344/3, ST/K003453/2, ST/N000048/1, ST/M004546/1, ST/N002695/1, ST/J003344/2, ST/K003453/1, ST/J003344/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1559865] Funding Source: National Science Foundation
Ask authors/readers for more resources
We present time-series spectra revealing changes in the circumstellar line profiles for the white dwarf WD 1145 + 017. Over the course of 2.2 years, the spectra show complete velocity reversals in the circumstellar absorption, moving from strongly redshifted in 2015 April to strongly blueshifted in 2017 June. The depth of the absorption also varies, increasing by a factor of two over the same period. The dramatic changes in the line profiles are consistent with eccentric circumstellar gas rings undergoing general relativistic precession. As the argument of periapsis of the rings changes relative to the line of sight, the transiting gas shifts from receding in 2016 to approaching in 2017. Based on the precession timescales in the favored model, we make predictions for the line profiles over the next few years. Spectroscopic monitoring of WD 1145 + 017 will test these projections and aid in developing more accurate white dwarf accretion disk models.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available