English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report nine years of optical spectroscopy of the metal-polluted whitedwarf SDSS J104341.53+085558.2, which presents morphological variations of theline profiles of the 8600 \AA\ Ca II triplet emission from the gaseouscomponent of its debris disc. Similar changes in the shape of the Ca II triplethave also been observed in two other systems that host a gaseous disc, and arelikely related to the same mechanism. We report the Mg, Si, and Ca abundancesof the debris detected in the photosphere of SDSS J1043+0855, place upperlimits on O and Fe, and derive an accretion rate of (2.5 - 12)x$10^8$ g/s,consistent with those found in other systems with detected debris discs. TheMg/Si ratio and the upper limit on the Fe/Si ratio of the accreted materialbroadly agree with those found for the crust of the Earth. We also review therange of variability observed among white dwarfs with planetary debris discs.

Another one grinds the dust: Variability of the planetary debris disc at the white dwarf SDSS J104341.53+085558.2