338 citations · 4.2k across the 85 of their papers we have counts for
19 papers · 1 filter
Planetesimals at DZ stars I: chondritic compositions and a massive accretion event
Andrew Swan, Jay Farihi, Carl Melis +4
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 di…
TOI-2084 b and TOI-4184 b: two new sub-Neptunes around M dwarf stars
K. Barkaoui, M. Timmermans, A. Soubkiou +67
We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/K…
Unusual Abundances from Planetary System Material Polluting the White Dwarf G238-44
Ted M Johnson, Beth L. Klein, D. Koester +3
Ultraviolet and optical spectra of the hydrogen-dominated atmosphere white dwarf star G238-44 obtained with FUSE, Keck/HIRES, HST/COS, and HST/STIS reveal ten elements heavier than…
Two temperate super-Earths transiting a nearby late-type M dwarf
L. Delrez, C. A. Murray, F. J. Pozuelos +82
In the age of JWST, temperate terrestrial exoplanets transiting nearby late-type M dwarfs provide unique opportunities for characterising their atmospheres, as well as searching fo…
Exomoons as sources of white dwarf pollution
Isabella L Trierweiler, Alexandra E Doyle, Carl Melis +2
Polluted white dwarfs offer a unique way to study the bulk compositions of exoplanetary material, but it is not always clear if this material originates from comets, asteroids, moo…
V488 Per revisited: no strong mid-infrared emission features and no evidence for stellar/sub-stellar companions
Swetha Sankar, Carl Melis, Beth L. Klein +4
We present characterization of the planetary system architecture for V488 Per, the dustiest main sequence star known with a fractional infrared luminosity of ~16%. Far-infrared ima…
Extreme Variability of the V488 Persei Debris Disk
G. H. Rieke, K. Y. L. Su, Carl Melis +1
V488 Persei is the most extreme debris disk known in terms of the fraction of the stellar luminosity it intercepts and reradiates. The infrared output of its disk is extremely vari…
Collisions in a gas-rich white dwarf planetary debris disc
Andrew Swan, Scott J. Kenyon, Jay Farihi +5
WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3-5 micron flux sinc…
Recurring Planetary Debris Transits and Circumstellar Gas around White Dwarf ZTF J03281219
Zachary P. Vanderbosch, Saul Rappaport, Joseph A. Guidry +14
We present follow-up photometry and spectroscopy of ZTF J03281219 strengthening its status as a white dwarf exhibiting transiting planetary debris. Using TESS and Zwicky Transie…
Host-star and exoplanet compositions: a pilot study usinga wide binary with a polluted white dwarf
Amy Bonsor, Paula Jofre, Oliver Shorttle +3
Planets and stars ultimately form out of the collapse of the same cloud of gas. Whilst planets, and planetary bodies, readily loose volatiles, a common hypothesis is that they reta…
A Giant Planet Candidate Transiting a White Dwarf
Andrew Vanderburg, Saul A. Rappaport, Siyi Xu +61
Astronomers have discovered thousands of planets outside the solar system, most of which orbit stars that will eventually evolve into red giants and then into white dwarfs. During…
Mid-infrared Studies of HD 113766 and HD 172555: Assessing Variability in the Terrestrial Zone of Young Exoplanetary Systems
Kate Y. L. Su, George H. Rieke, Carl Melis +4
We present multi-epoch infrared photometry and spectroscopy obtained with warm Spitzer, Subaru and SOFIA to assess variability for the young (20 Myr) and dusty debris systems…
Astro 2020 Science White Paper: Evolved Planetary Systems around White Dwarfs
Boris Gaensicke, Martin Barstow, Amy Bonsor +25
Practically all known planet hosts will evolve into white dwarfs, and large parts of their planetary systems will survive this transition - the same is true for the solar system be…
New Frontiers for Terrestrial-sized to Neptune-sized Exoplanets In the Era of Extremely Large Telescopes
Ji Wang, Michael R. Meyer, Alan Boss +20
Surveys reveal that terrestrial- to Neptune-sized planets (1 4 R) are the most common type of planets in our galaxy. Detecting and characterizing such small…
Does a Differentiated, Carbonate-Rich, Rocky Object Pollute the White Dwarf SDSSJ104341.53+085558.2?
Carl Melis, P. Dufour
We present spectroscopic observations of the dust- and gas-enshrouded, polluted, single white dwarf star SDSSJ104341.53+085558.2 (hereafter SDSSJ1043+0855). Hubble Space Telescope…
Herschel Observations of Dusty Debris Disks
Laura Vican, Adam Schneider, Geoff Bryden +4
We present results from two Herschel observing programs using the Photodetector Array Camera and Spectrometer. During three separate campaigns, we obtained Herschel data for 24 sta…
Directed Energy Missions for Planetary Defense
Philip Lubin, Gary B. Hughes, Mike Eskenazi +14
Directed energy for planetary defense is now a viable option and is superior in many ways to other proposed technologies, being able to defend the Earth against all known threats.…
Orbital Simulations on Deflecting Near-Earth Objects by Directed Energy
Qicheng Zhang, Kevin J. Walsh, Carl Melis +2
Laser ablation of a Near-Earth Object (NEO) on a collision course with Earth produces a cloud of ejecta which exerts a thrust on the NEO, deflecting it from its original trajectory…
The bulk composition of exo-planets
Boris Gaensicke, John Debes, Patrick Dufour +7
Priorities in exo-planet research are rapidly moving from finding planets to characterizing their physical properties. Of key importance is their chemical composition, which feeds…