The most direct and substantial way to measure the geochemistry of extrasolar objects is to
perform chemical autopsies on their broken-up remains. However, traditional ways of …

Polluted white dwarfs serve as astrophysical mass spectrometers–their photospheric
abundances are used to infer the composition of planetary objects that accrete onto them …

White dwarf planetary science is a rapidly growing field of research featuring a diverse set of
observations and theoretical explorations. Giant planets, minor planets, and debris discs …

A significant fraction of white dwarfs (WDs) exhibit signs of ongoing accretion of refractory
elements at rates∼ 10 3–10 7 kg s− 1, among which, 37 WDs were detected to harbor dusty …

Various white-dwarf (WD) binary scenarios have been proposed trying to understand the
nature and the diversity of type Ia supernovae (SNe Ia). In this work, we study the evolution …

The magnetic field of a host star can impact the orbit of a stellar partner, planet, or asteroid if
the orbiting body is itself magnetic or electrically conducting. Here, we focus on the …

Dynamically active planetary systems orbit a significant fraction of white dwarf stars. These
stars often exhibit surface metals accreted from debris disks, which are detected through …

Abstract About 25%–50% of white dwarfs (WDs) are found to be polluted by heavy elements.
It has been argued that the pollution could be caused by the tidal disruption of an …

This thesis explores extrinsic interaction signatures in cool white dwarfs through
multicomponent optical and infrared spectra coupled with photometry. The first part of the …

Since the discovery of the first exoplanets in the 1990s, our knowledge of planets has
expanded far beyond the Solar System, and surveys like Kepler and Tess have revealed a …