173 citations · 958 across the 19 of their papers we have counts for
10 papers · 1 filter
Accretion Rate Changes Detected in a Polluted White Dwarf
Jay Farihi, Hiba Tu Noor, Carl Melis +6
This letter reports statistically significant changes in the equivalent widths of MgII and CaII lines in the dusty and polluted white dwarf WD 0106-328, based on six epochs of spec…
Activity in White Dwarf Debris Disks I: Spitzer Legacy Reveals Variability Incompatible with the Canonical Model
Hiba Tu Noor, Jay Farihi, Scott J. Kenyon +11
This study presents all available, multi-epoch 3.6 and 4.5 m photometry from Spitzer Space Telescope observations of white dwarf debris disks, including weekly cadence observati…
Modelling the KIC8462852 light curves: compatibility of the dips and secular dimming with an exocomet interpretation
M. C. Wyatt, R. van Lieshout, G. M. Kennedy +1
This paper shows how the dips and secular dimming in the KIC8462852 light curve can originate in circumstellar material distributed around a single elliptical orbit (e.g., exocomet…
ALMA and Herschel Observations of the Prototype Dusty and Polluted White Dwarf G29-38
J. Farihi, M. C. Wyatt, J. S. Greaves +3
ALMA Cycle 0 and Herschel PACS observations are reported for the prototype, nearest, and brightest example of a dusty and polluted white dwarf, G29-38. These long wavelength progra…
Stochastic accretion of planetesimals onto white dwarfs: constraints on the mass distribution of accreted material from atmospheric pollution
M. C. Wyatt, J. Farihi, J. E. Pringle +1
This paper explores how the stochastic accretion of planetesimals onto white dwarfs would be manifested in observations of their atmospheric pollution. Archival observations of pol…
Discovery of the Fomalhaut C debris disc
G. M. Kennedy, M. C. Wyatt, P. Kalas +5
Fomalhaut is one of the most interesting and well studied nearby stars, hosting at least one planet, a spectacular debris ring, and two distant low-mass stellar companions (TW PsA…
Confusion limited surveys: using WISE to quantify the rarity of warm dust around Kepler stars
G. M. Kennedy, M. C. Wyatt
We describe a search for infra-red excess emission from dusty circumstellar material around 180,000 stars observed by the Kepler and WISE missions. This study is motivated by i) th…
Debris discs and comet populations around Sun-like stars: the Solar System in context
J. S. Greaves, M. C. Wyatt
Numerous nearby FGK dwarfs possess discs of debris generated by collisions among comets. Here we fit the levels of dusty excess observed by Spitzer at 70$\umu$m and show that they…
Outward Migration of Terrestrial Embryos in Binary Systems
Matthew J. Payne, Mark C. Wyatt, Philippe Thébault
We consider the formation and migration of protoplanetary embryos in disks around the stars in tight binary systems (separations ~ 20 AU. In such systems, the initial stages of run…
Debris disc stirring by secular perturbations from giant planets
Alexander Mustill, Mark Wyatt
Detectable debris discs are thought to require dynamical excitation (`stirring'), so that planetesimal collisions release large quantities of dust. We investigate the effects of th…