198 citations · 1.7k across the 33 of their papers we have counts for
26 papers · 1 filter
Mercury's formation within the Early Instability Scenario
Matthew S. Clement, John E. Chambers, Nathan A. Kaib +2
The inner solar system's modern orbital architecture provides inferences into the epoch of terrestrial planet formation; a ~100 Myr time period of planet growth via collisions with…
Mercury as the relic of Earth and Venus' outward migration
Matthew S. Clement, Sean N. Raymond, John E. Chambers
In spite of substantial advancements in simulating planet formation, the planet Mercury's diminutive mass, isolated orbit, and the absence of planets with shorter orbital periods i…
Exploring tidal obliquity variations with SMERCURY-T
Steven M. Kreyche, Jason W. Barnes, Billy L. Quarles +1
We introduce our new code, SMERCURY-T, which is based on existing codes SMERCURY (Lissauer et al. 2012) and Mercury-T (Bolmont et al. 2015). The result is a mixed-variable symplect…
The early instability scenario: Mars' mass explained by Jupiter's orbit
Matthew S. Clement, Nathan A. Kaib, Sean N. Raymond +1
The formation of the solar system's giant planets predated the ultimate epoch of massive impacts that concluded the process of terrestrial planet formation. Following their formati…
Born extra-eccentric: A broad spectrum of primordial configurations of the gas giants that match their present-day orbits
Matthew S. Clement, Rogerio Deienno, Nathan A. Kaib +3
In a recent paper we proposed that the giant planets' primordial orbits may have been eccentric (~0.05), and used a suite of dynamical simulations to show outcomes of the giant pla…
Dynamical avenues for Mercury's origin II: in-situ formation in the inner terrestrial disk
Matthew S. Clement, John E. Chambers
Modern terrestrial planet formation models are highly successful at consistently generating planets with masses and orbits analogous to those of Earth and Venus. In stark contrast…
Dynamical avenues for Mercury's origin I: The lone survivor of a primordial generation of short-period proto-planets
Matthew S. Clement, John E. Chambers, Alan P. Jackson
The absence of planets interior to Mercury continues to puzzle terrestrial planet formation models, particularly when contrasted with the relatively high derived occurrence rates o…
Born eccentric: constraints on Jupiter and Saturn's pre-instability orbits
Mattthew S. Clement, Sean N. Raymond, Nathan A. Kaib +3
An episode of dynamical instability is thought to have sculpted the orbital structure of the outer solar system. When modeling this instability, a key constraint comes from Jupiter…
An Analytic Model for an Evolving Protoplanetary Disk with a Disk Wind
John Chambers
We describe an analytic model for an evolving protoplanetary disk driven by viscosity and a disk wind. The disk is heated by stellar irradiation and energy generated by viscosity.…
The Effect of Seafloor Weathering on Planetary Habitability
John Chambers
Conventionally, a habitable planet is one that can support liquid water on its surface. Habitability depends on temperature, which is set by insolation and the greenhouse effect, d…
Embryo formation with GPU acceleration: reevaluating the initial conditions for terrestrial accretion
Matthew S. Clement, Nathan A. Kaib, John E. Chambers
The solar system's terrestrial planets are thought to have accreted over millions of years out of a sea of smaller embryos and planetesimals. Because it is impossible to know the s…
Retrograde-rotating exoplanets experience obliquity excitations in an eccentricity-enabled resonance
Steven M. Kreyche, Jason W. Barnes, Billy L. Quarles +3
Previous studies have shown that planets that rotate retrograde (backwards with respect to their orbital motion) generally experience less severe obliquity variations than those th…
Search for Nearby Earth Analogs. II. detection of five new planets, eight planet candidates, and confirmation of three planets around nine nearby M dwarfs
Fabo Feng, R. Paul Butler, Stephen A. Shectman +9
Zechmeister et al. (2009) surveyed 38 nearby M dwarfs from March 2000 to March 2007 with VLT2 and the UVES spectrometer. This data has recently been reanalyzed (Butler et al. 2019)…
Dynamical Constraints on Mercury's Collisional Origin
Matthew S. Clement, Nathan A. Kaib, John E. Chambers
Of the solar system's four terrestrial planets, the origin of Mercury is perhaps the most mysterious. Modern numerical simulations designed to model the dynamics of terrestrial pla…
The early instability scenario: terrestrial planet formation during the giant planet instability, and the effect of collisional fragmentation
Matthew S. Clement, Nathan A. Kaib, Sean N. Raymond +2
The solar system's dynamical state can be explained by an orbital instability among the giant planets. A recent model has proposed that the giant planet instability happened during…
Obliquity Evolution of the Potentially Habitable Exoplanet Kepler-62f
Billy Quarles, Jason W. Barnes, Jack J. Lissauer +1
Variations in the axial tilt, or obliquity, of terrestrial planets can affect their climates and therefore their habitability. Kepler-62f is a 1.4 R planet orbiting within…
Collisional Fragmentation is Not a Barrier to Close-in Planet Formation
Joshua Wallace, Scott Tremaine, John Chambers
Collisional fragmentation is shown to not be a barrier to rocky planet formation at small distances from the host star. Simple analytic arguments demonstrate that rocky planet form…
Pebble Accretion and the Diversity of Planetary Systems
J. E. Chambers
I examine the standard model of planet formation, including pebble accretion, using numerical simulations. Planetary embryos large enough to become giant planets do not form beyond…
Obliquity Variability of a Potentially Habitable Early Venus
Jason W. Barnes, Billy Quarles, Jack J. Lissauer +2
Venus currently rotates slowly, with its spin controlled by solid-body and atmospheric thermal tides. However, conditions may have been far different 4 billion years ago, when the…
The Frequency of Giant impacts on Earth-like Worlds
Elisa V. Quintana, Thomas Barclay, William Borucki +2
The late stages of terrestrial planet formation are dominated by giant impacts that collectively influence the growth, composition and habitability of any planets that form. Hither…
The Fragility of the Terrestrial Planets During a Giant Planet Instability
Nathan A. Kaib, John E. Chambers
Many features of the outer solar system are replicated in numerical simulations if the giant planets undergo an orbital instability that ejects one or more ice giants. During this…
The Long-Term Dynamical Evolution of Planetary Systems
Melvyn B. Davies, Fred C. Adams, Philip Armitage +5
This chapter concerns the long-term dynamical evolution of planetary systems from both theoretical and observational perspectives. We begin by discussing the planet-planet interact…
A Survey for Very Short-Period Planets in the Kepler Data
Brian Jackson, Christopher C. Stark, Elisabeth R. Adams +2
We conducted a search for very short-period transiting objects in the publicly available Kepler dataset. Our preliminary survey has revealed four planetary candidates, all with orb…
A Combined VLT and Gemini Study of the Atmosphere of the Directly-Imaged Planet, beta Pictoris b
Thayne Currie, Adam Burrows, Nikku Madhusudhan +10
We analyze new/archival VLT/NaCo and Gemini/NICI high-contrast imaging of the young, self-luminous planet Pictoris b in seven near-to-mid IR photometric filters, using advanced…