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- W4386980120 endingPage "3831" @default.
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- W4386980120 abstract "ABSTRACT There is a wealth of evidence to suggest that planetary systems can survive beyond the main sequence. Most commonly, white dwarfs are found to be accreting material from tidally disrupted asteroids, whose bulk compositions are reflected by the metals polluting the stellar photospheres. While many examples are known, most lack the deep, high-resolution data required to detect multiple elements, and thus characterize the planetesimals that orbit them. Here, spectra of seven DZ white dwarfs observed with Keck High Resolution Echelle Spectrometer (HIRES) are analysed, where up to nine metals are measured per star. Their compositions are compared against those of Solar system objects, working in a Bayesian framework to infer or marginalize over the accretion history. All of the stars have been accreting primitive material, similar to chondrites, with hints of a Mercury-like composition at one star. The most polluted star is observed several Myr after its last major accretion episode, in which a Moon-sized object met its demise." @default.
- W4386980120 created "2023-09-24" @default.
- W4386980120 creator A5008644041 @default.
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- W4386980120 creator A5061619584 @default.
- W4386980120 creator A5062140274 @default.
- W4386980120 creator A5075607587 @default.
- W4386980120 date "2023-09-22" @default.
- W4386980120 modified "2023-10-15" @default.
- W4386980120 title "Planetesimals at DZ stars I: chondritic compositions and a massive accretion event" @default.
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