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Serendipitous discovery of a dusty disc around WDJ181417.84-735459.83
dc.contributor.author | González-Egea, Elena | |
dc.contributor.author | Raddi, Roberto | |
dc.contributor.author | Koester, Detlev | |
dc.contributor.author | Rogers, Laura K. | |
dc.contributor.author | Marocco, Federico | |
dc.contributor.author | Cooper, William J. | |
dc.contributor.author | Beamín, Juan Carlos | |
dc.contributor.author | Burningham, Ben | |
dc.contributor.author | Day-Jones, Avril C. | |
dc.contributor.author | Forbrich, Jan | |
dc.contributor.author | Pinfield, David J. | |
dc.date.accessioned | 2021-03-03T16:05:54Z | |
dc.date.available | 2021-03-03T16:05:54Z | |
dc.date.issued | 2021-03-01 | |
dc.identifier | 10.1093/mnras/staa3836 | |
dc.identifier.issn | 00358711 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12728/8651 | |
dc.description.abstract | Spectroscopic observations of white dwarfs reveal that many of them are polluted by exoplanetary material, whose bulk composition can be uniquely probed this way. We present a spectroscopic and photometric analysis of the DA white dwarf WDJ181417.84-735459.83, an object originally identified to have a strong infrared (IR) excess in the 2MASS and WISE catalogues that we confirmed to be intrinsic to the white dwarf, and likely corresponding to the emission of a dusty disc around the star. The finding of Ca, Fe, and Mg absorption lines in two X-SHOOTER spectra of the white dwarf, taken 8 years apart, is further evidence of accretion from a dusty disc. We do not report variability in the absorption lines between these two spectra. Fitting a blackbody model to the IR excess gives a temperature of 910 ± 50 K. We have estimated a total accretion flux from the spectroscopic metal lines of |M}| = 1.784 × 10{9},g s-1. | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | Oxford University Press | es_ES |
dc.subject | accretion, accretion discs | es_ES |
dc.subject | stars: white dwarfs | es_ES |
dc.title | Serendipitous discovery of a dusty disc around WDJ181417.84-735459.83 | es_ES |
dc.type | Article | es_ES |