465 citations · 10.9k across the 187 of their papers we have counts for
59 papers · 1 filter
Low Mass Companions for Five Solar-Type Stars from the Magellan Planet Search Program
Dante Minniti, R. Paul Butler, Mercedes Lopez-Morales +5
We report low mass companions orbiting five Solar-type stars that have emerged from the Magellan precision Doppler velocity survey, with minimum (Msini) masses ranging from 1.2 to…
Mean Motion Resonances in Extrasolar Planetary Systems with Turbulence, Interactions, and Damping
Daniel Lecoanet, Fred C. Adams, Anthony M. Bloch
This paper continues previous work on the effects of turbulence on mean motion resonances in extrasolar planetary systems. Turbulence is expected to arise in the disks that form pl…
Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739
Mercedes Lopez-Morales, R. Paul Butler, Debra A. Fischer +6
We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of M sin i = 4.96 M_Jup and is o…
Stars In Other Universes: Stellar structure with different fundamental constants
Fred C. Adams
Motivated by the possible existence of other universes, with possible variations in the laws of physics, this paper explores the parameter space of fundamental constants that allow…
Turbulence in Extrasolar Planetary Systems Implies that Mean Motion Resonances are Rare
Fred C. Adams, Gregory Laughlin, Anthony M. Bloch
This paper considers the effects of turbulence on mean motion resonances in extrasolar planetary systems and predicts that systems rarely survive in a resonant configuration. A gro…
The Eccentric Frame Decomposition of Central Force Fields
Jared M. Maruskin, Daniel J. Scheeres, Fred C. Adams +1
The rosette-shaped motion of a particle in a central force field is known to be classically solvable by quadratures. We present a new approach of describing and characterizing such…
UV Radiation Fields Produced by Young Embedded Star Clusters
M. Fatuzzo, F. C. Adams
A large fraction of stars form within young embedded clusters, and these environments produce a substantial ultraviolet (UV) background radiation field, which can provide feedback…
Ambipolar Diffusion in Molecular Cloud Cores and the Gravomagneto Catastrophe
Fred C. Adams, Frank H. Shu
This paper re-examines the problem of ambipolar diffusion as a mechanism for the production and runaway evolution of centrally condensed molecular cloud cores, a process that has b…
Orbital Instabilities in a Triaxial Cusp Potential
Fred C. Adams, Anthony M. Bloch, Suzanne C. Butler +2
This paper constructs an analytic form for a triaxial potential that describes the dynamics of a wide variety of astrophysical systems, including the inner portions of dark matter…
Eccentricity evolution of giant planet orbits due to circumstellar disk torques
Althea V. Moorhead, Fred C. Adams
The extrasolar planets discovered to date possess unexpected orbital elements. Most orbit their host stars with larger eccentricities and smaller semi-major axes than similarly siz…
Role of Dynamical Research in the Detection and Characterization of Exoplanets
Eric B. Ford, Fred C. Adams, Phil Armitage +6
(Abridged) The discovery of extrasolar planetary systems revealed an unexpected diversity of planetary systems that has revolutionized planet formation theory. A strong program of…
Cool Stars in Hot Places
S. T. Megeath, E. Gaidos, J. J. Hester +4
During the last three decades, evidence has mounted that star and planet formation is not an isolated process, but is influenced by current and previous generations of stars. Altho…
Terrestrial Planet Formation Around Individual Stars Within Binary Star Systems
Elisa V. Quintana, Fred C. Adams, Jack J. Lissauer +1
We calculate herein the late stages of terrestrial planet accumulation around a solar type star that has a binary companion with semimajor axis larger than the terrestrial planet r…
The Asymptotic Form of Cosmic Structure: Small Scale Power and Accretion History
Michael T. Busha, August E. Evrard, Fred C. Adams
We explore the effects of small scale structure on the formation and equilibrium of dark matter halos in a universe dominated by vacuum energy. We present the results of a suite of…
Relativistic Effects in Extrasolar Planetary Systems
Fred C. Adams, Gregory Laughlin
This paper considers general relativistic (GR) effects in currently observed extrasolar planetary systems. Although GR corrections are small, they can compete with secular interact…
Enhanced Cosmic Ray Flux and Ionization for Star Formation in Molecular Clouds Interacting with Supernova Remnants
M. Fatuzzo, F. C. Adams, F. Melia
Molecular clouds interacting with supernova remnants may be subject to a greatly enhanced irradiation by cosmic rays produced at the shocked interface between the ejecta and the mo…
Baryonic Collapse within Dark Matter Halos and the Formation of Gaseous Galactic Disks
Fred C. Adams, Anthony M. Bloch
This paper constructs an analytic framework for calculating the assembly of galactic disks from the collapse of gas within dark matter halos, with the goal of determining the surfa…
A Statistical Stability Analysis of Earth-like Planetary Orbits in Binary Systems
M. Fatuzzo, F. C. Adams, R. Gauvin +1
This paper explores the stability of an Earth-like planet orbiting a solar-mass star in the presence of a stellar companion using ~ 400,000 numerical integrations. Given the chaoti…
Long Term Evolution of Close Planets Including the Effects of Secular Interactions
Fred C. Adams, Gregory Laughlin
This paper studies the long term evolution of planetary systems containing short-period planets, including the effects of tidal circularization, secular excitation of eccentricity…
Effects of Secular Interactions in Extrasolar Planetary Systems
Fred C. Adams, Gregory Laughlin
This paper studies the effects of dynamical interactions among the planets in observed extrasolar planetary systems, including hypothetical additional bodies, with a focus on secul…
The Structure and Evolution of Young Stellar Clusters
L. Allen, S. T. Megeath, R. Gutermuth +6
We examine the properties of embedded clusters within 1 kiloparsec using new data from the Spitzer Space Telescope, as well as recent results from 2MASS and other ground-based near…
Early Evolution of Stellar Groups and Clusters: Environmental Effects on Forming Planetary Systems
Fred C. Adams, Eva M. Proszkow, Marco Fatuzzo +1
This paper studies the dynamical evolution of young stellar clusters with = 100 - 1000 members. We use N-body simulations to explore how evolution depends on system size an…
Giant Planet Migration through the Action of Disk Torques and Planet Scattering
Althea V. Moorhead, Fred C. Adams
This paper presents a parametric study of giant planet migration through the combined action of disk torques and planet-planet scattering. The torques exerted on planets during Typ…
Orbits in Extended Mass Distributions: General Results and the Spirographic Approximation
Fred C. Adams, Anthony M. Bloch
This paper explores orbits in extended mass distributions and develops an analytic approximation scheme based on epicycloids (spirograph patterns). We focus on the Hernquist potent…