Christopher J. Manser
Doppler imaging of the planetary debris disc at the white dwarf SDSS J122859.93+104032.9
Manser, Christopher J.; Gänsicke, Boris T.; Marsh, Thomas R.; Veras, Dimitri; Koester, Detlev; Breedt, Elmé; Pala, Anna F.; Parsons, Steven G.; Southworth, John
Authors
Boris T. Gänsicke
Thomas R. Marsh
Dimitri Veras
Detlev Koester
Elmé Breedt
Anna F. Pala
Steven G. Parsons
Dr John Taylor j.k.taylor@keele.ac.uk
Abstract
Debris discs which orbit white dwarfs are signatures of remnant planetary systems. We present 12 yr of optical spectroscopy of the metal-polluted white dwarf SDSS J1228+1040, which shows a steady variation in the morphology of the 8600?Å Ca?II triplet line profiles from the gaseous component of its debris disc. We identify additional emission lines of O?I, Mg?I, Mg?II, Fe?II and Ca?II in the deep co-added spectra. These emission features (including Ca H & K) exhibit a wide range in strength and morphology with respect to each other and to the Ca?II triplet, indicating different intensity distributions of these ionic species within the disc. Using Doppler tomography, we show that the evolution of the Ca?II triplet profile can be interpreted as the precession of a fixed emission pattern with a period in the range 24–30 yr. The Ca?II line profiles vary on time-scales that are broadly consistent with general relativistic precession of the debris disc.
Citation
Manser, C. J., Gänsicke, B. T., Marsh, T. R., Veras, D., Koester, D., Breedt, E., …Southworth, J. (2016). Doppler imaging of the planetary debris disc at the white dwarf SDSS J122859.93+104032.9. Monthly Notices of the Royal Astronomical Society, 455(4), 4467 -4478. https://doi.org/10.1093/mnras/stv2603
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 3, 2015 |
Online Publication Date | Dec 10, 2015 |
Publication Date | Feb 1, 2016 |
Publicly Available Date | May 26, 2023 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 455 |
Issue | 4 |
Pages | 4467 -4478 |
DOI | https://doi.org/10.1093/mnras/stv2603 |
Keywords | astrophysics, accretion, accretion discs line, profiles, circumstellar matter, stars, SDSS J122859.93+104032.9, white dwarfs |
Publisher URL | http://dx.doi.org/10.1093/mnras/stv2603 |
Files
2016MNRAS.455.4467M.pdf
(1.4 Mb)
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