Orbital relaxation and excitation of planets tidally interacting with white dwarfs

  title={Orbital relaxation and excitation of planets tidally interacting with white dwarfs},
  author={Dimitri Veras and Michael Efroimsky and Valeri V. Makarov and Gwena{\"e}l Bou{\'e} and Vera Wolthoff and Sabine Reffert and Andreas Quirrenbach and P.-E. Tremblay and Boris T. G{\"a}nsicke},
  journal={Monthly Notices of the Royal Astronomical Society},
Observational evidence of white dwarf planetary systems is dominated by the remains of exo-asteroids through accreted metals, debris discs, and orbiting planetesimals. However, exo-planets in these systems play crucial roles as perturbing agents, and can themselves be perturbed close to the white dwarf Roche radius. Here, we illustrate a procedure for computing the tidal interaction between a white dwarf and a near-spherical solid planet. This method determines the planet’s inward and/or… Expand

Figures and Tables from this paper

Tidal circularization of gaseous planets orbiting white dwarfs
A gas giant planet which survives the giant branch stages of evolution at a distance of many au and then is subsequently perturbed sufficiently close to a white dwarf will experience orbitalExpand
Short-term stability of particles in the WD J0914+1914 white dwarf planetary system
Nearly all known white dwarf planetary systems contain detectable rocky debris in the stellar photosphere. A glaring exception is the young and still evolving white dwarf WD J0914+1914, which insteadExpand
The dynamical history of the evaporating or disrupted ice giant planet around white dwarf WD J0914+1914
Robust evidence of an ice giant planet shedding its atmosphere around the white dwarf WD J0914+1914 represents a milestone in exoplanetary science, allowing us to finally supplement our knowledge ofExpand
Chaotic Rotation and Evolution of Asteroids and Small Planets in High-eccentricity Orbits around White Dwarfs
Observed planetary debris in white dwarf atmospheres predominately originate from the destruction of small bodies on highly eccentric ($>0.99$) orbits. Despite their importance, these minor planetsExpand
High-resolution Spectra and Biosignatures of Earth-like Planets Transiting White Dwarfs
With the first observations of debris disks as well as proposed planets around white dwarfs, the question of how rocky planets around such stellar remnants can be characterized and probed for signsExpand
Planetary Systems Around White Dwarfs
  • D. Veras
  • Physics
  • Oxford Research Encyclopedia of Planetary Science
  • 2021
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 have all beenExpand
The lifetimes of planetary debris discs around white dwarfs
  • D. Veras, K. Heng
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • 2020
The lifetime of a planetary disc that orbits a white dwarf represents a crucial input parameter into evolutionary models of that system. Here we apply a purely analytical formalism to estimateExpand
Understanding the origin of white dwarf atmospheric pollution by dynamical simulations based on detected three-planet systems
Between 25-50 % of white dwarfs (WD) present atmospheric pollution by metals, mainly by rocky material, which has been detected as gas/dust discs, or in the form of photometric transits in some WDs.Expand
Constraining planet formation around 6–8 M⊙ stars
Identifying planets around O-type and B-type stars is inherently difficult; the most massive known planet host has a mass of only about $3M_{\odot}$. However, planetary systems which survive theExpand
Survivability of radio-loud planetary cores orbiting white dwarfs
The discovery of the intact metallic planetary core fragment orbiting the white dwarf SDSS J1228+1040 within one Solar radius highlights the possibility of detecting larger, unfragmented conductingExpand


Eccentric planets and stellar evolution as a cause of polluted white dwarfs
A significant fraction of white dwarfs (WDs) are observed to be polluted with metals despite high surface gravities and short settling times. The current theoretical model for this pollution isExpand
Formation of planetary debris discs around white dwarfs – I. Tidal disruption of an extremely eccentric asteroid
25–50 per cent of all white dwarfs (WDs) host observable and dynamically active remnant planetary systems based on the presence of close-in circumstellar dust and gas and photospheric metalExpand
A planetesimal orbiting within the debris disc around a white dwarf star
A stable 123.4-minute periodic variation in the strength and shape of the Ca ii emission line profiles originating from the debris disc around the white dwarf SDSS J122859.93+104032 is interpreted as the signature of a solid-body planetesimal held together by its internal strength. Expand
Planetary engulfment as a trigger for white dwarf pollution
The presence of a planetary system can shield a planetesimal disk from the secular gravitational perturbations due to distant outer massive objects (planets or stellar companions). As the host starExpand
It has long been suspected that metal-polluted white dwarfs (types DAZ, DBZ, and DZ) and white dwarfs with dusty disks possess planetary systems, but a specific physical mechanism by whichExpand
Unstable low-mass planetary systems as drivers of white dwarf pollution
At least 25 percent of white dwarfs show atmospheric pollution by metals, sometimes accompanied by detectable circumstellar dust/gas discs or (in the case of WD 1145+017) transiting disintegratingExpand
The frequency of planetary debris around young white dwarfs
Context. Heavy metals in the atmospheres of white dwarfs are thought in many cases to be accreted from a circumstellar debris disk, which was formed by the tidal disruption of a rocky planetary bodyExpand
Liberating exomoons in white dwarf planetary systems
Previous studies indicate that more than a quarter of all white dwarf (WD) atmospheres are polluted by remnant planetary material, with some WDs being observed to accrete the mass of Pluto in 106 yr.Expand
Foretellings of Ragnarök: World-engulfing Asymptotic Giants and the Inheritance of White Dwarfs
The search for planets around white dwarf stars, and evidence for dynamical instability around them in the form of atmospheric pollution and circumstellar disks, raises questions about the nature ofExpand
Detectable close-in planets around white dwarfs through late unpacking
Although 25%-50% of white dwarfs (WDs) display evidence for remnant planetary systems, their orbital architectures and overall sizes remain unknown. Vibrant close-in (~1 Solar radius) circumstellarExpand