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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Spectroscopic observations of white dwarfs reveal that many of them arepolluted by exoplanetary material, whose bulk composition can be uniquelyprobed this way. We present a spectroscopic and photometric analysis of the DAwhite dwarf WDJ181417.84$-$735459.83, an object originally identified to have astrong infrared excess in the 2MASS and WISE catalogues that we confirmed to beintrinsic to the white dwarf, and likely corresponding to the emission of adusty disc around the star. The finding of Ca, Fe and Mg absorption lines intwo X-SHOOTER spectra of the white dwarf, taken 8 years apart, is furtherevidence of accretion from a dusty disc. We do not report variability in theabsorption lines between these two spectra. Fitting a blackbody model to theinfrared excess gives a temperature of 910$\pm50$ K. We have estimated a totalaccretion flux from the spectroscopic metal lines of $|\dot{\rm M}| = 1.784\times 10^{9}\, $g s$^{-1}$.

Serendipitous discovery of a dusty disc around WDJ181417.84-735459.83