Research
My research focuses on numerical simulations of planet formation. I am interested
in collisions of planetesimals and protoplanets, and the cumulative effect collisions can have on
the compositions of growing planets. Using a state-of-the-art collision model that
includes erosion and fragmentation, we can track the chemical composition of
accreting rocky planets.
I am also interested in the final fates of planetary systems, long after their host
star has died and left behind a white dwarf. Polluted white dwarfs appear to
accrete remnant planetary material, but it is unclear how this material is
delivered.
more
Biography
I am a postdoctoal scholar in the Department of Earth and Planetary Sciences at the University of California Davis, where I carry out research related to planetary collisions. Previously I was a postdoc in the School of Physics at the University of Bristol. My background is in Astrophysics, having gained my PhD in 2014 from the University of Warwick, where I carried out observational studies of ultra-compact accreting binaries.
Highlights
December 2017: Collisional stripping of planetary crusts
In this paper, published in EPSL,
we explore the effects of collisions on the outer crust of planetesimals and planetary embryos. We find that crust
is preferentially lost during collisions, and show that this can lead to changes in bulk composition of lithophile
elements if reaccretion is inefficient.
September 2017: Magnesium isotope evidence that accretional vapour loss shapes planetary compositions
In this paper by Hin et al., published in Nature,
new measurements are presented that show Earth and other large planetary bodies have isotpically heavier
magnesium compositions than primitive meteorites. We examine vapour loss from planetesimals as a
consequence of collisions during accretion. Loss of significant mass of vapour from
growing planetary embryos could explain the Earth's isotopically heavy Magnesium signature.
See also coverage from:
The Washington Post,
Space.com,
The Independent.
October 2015: Compositional evolution during rocky protoplanet accretion
In this paper, published in ApJ,
we explore the effects of collisional evolution on the compositions of planetesimals and embryos during the
intermediate stages of planet formation. ADS link.
Contact
Philip J Carter
Department of Earth and Planetary Sciences
University of California Davis
One Shields Avenue
Davis
CA 95616
pjcarter (at) ucdavis.edu
Stewart Group
Earth and Planetary Sciences, UC Davis
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