Determination of the Interior Structure of Transiting Planets in Multiple-Planet Systems (2009)
Batygin, Konstantin, Bodenheimer , Peter, Laughlin, Gregory
Tidal dissipation within a short-period transiting extrasolar planet perturbed by a companion object can drive orbital evolution of the system to a so-called tidal fixed point, in which the apses of...
Refining Exoplanet Ephemerides and Transit Observing Strategies (2009)
Kane, Stephen R., Mahadevan, Suvrath, Von Braun, Kaspar, Laughlin, Gregory, Ciardi, David R.
Transiting planet discoveries have yielded a plethora of information regarding the internal structure and atmospheres of extra-solar planets. These discoveries have been restricted to the...
Meschiari, Stefano, Wolf, Aaron S., Rivera, Eugenio, Laughlin, Gregory, Vogt, Steve, Butler, Paul
We present the Systemic Console, a new all-in-one, general-purpose software package for the analysis and combined multiparameter fitting of Doppler radial velocity (RV) and transit timing...
Determination of the Interior Structure of Transiting Planets in Multiple-Planet Systems (2009)
Batygin, Konstantin, Bodenheimer, Peter, Laughlin, Gregory
Tidal dissipation within a short-period transiting extrasolar planet perturbed by a companion object can drive orbital evolution of the system to a so-called tidal fixed point, in which the apsidal...
Meschiari, Stefano, Wolf, Aaron, Rivera, Eugenio, Laughlin, Gregory, Vogt, Steve, Butler, Paul
We present the systemic Console, a new all-in-one, general-purpose software package for the analysis and combined multiparameter fitting of Doppler radial velocity (RV) and transit timing...
A Quasi-stationary Solution to Gliese 436b's Eccentricity (2009)
Batygin, Konstantin, Laughlin, Gregory, Meschiari, Stefano, Rivera, Eugenio, Vogt, Steve, Butler, Paul
We investigate the possibility that the large orbital eccentricity of the transiting Neptune-mass planet Gliese 436b (Gl 436b) is maintained in the face of tidal dissipation by a second planet in the...
A Quasi-Stationary Solution to Gliese 436b's Eccentricity (2009)
Batygin, Konstantin, Laughlin, Gregory, Meschiari, Stefano, Rivera, Eugenio, Vogt, Steve, Butler, Paul
We investigate the possibility that the large orbital eccentricity of the transiting Neptune-mass planet Gliese 436b is maintained in the face of tidal dissipation by a second planet in the system....
A Neptune-mass Planet Orbiting the Nearby G Dwarf HD16417 (2009)
O'Toole, Simon, Tinney, C. G., Butler, R. Paul, Jones, Hugh R. A., Bailey, Jeremy, Carter, Brad D., ...
Precision Doppler measurements from an intensive 48 night "Rocky Planet Search" observing campaign on the Anglo-Australian Telescope (AAT) have revealed the presence of a low-mass exoplanet orbiting...
Saturn forms by core accretion in 3.4 Myr (2008)
Dodson-Robinson, Sarah E., Bodenheimer, Peter, Laughlin, Gregory, Willacy, Karen, Turner, Neal J., Beichman, C. A.
We present two new in situ core accretion simulations of Saturn with planet formation timescales of 3.37 Myr (model S0) and 3.48 Myr (model S1), consistent with observed protostellar disk lifetimes....
Mining the Metal-Rich Stars for Planets (2007)
We examine the correlation between stellar metallicity and the presence of shortperiod planets. It appears that approximately 1 % of dwarf stars in the solar neighborhood harbor short-period planets...
2001): Short-term dynamical interactions among extrasolar planets (2007)
Gregory Laughlin, John E. Chambers
We show that short-term perturbations among massive planets in multiple planet systems can result in radial velocity variations of the central star which dier substantially from velocity variations...
Gregory Laughlin, Fred C. Adams
A number of recently discovered extrasolar planet candidates have surprisingly small orbits, which may indicate that considerable orbital migration takes place in protoplanetary systems. A natural...
TWO SUBSTELLAR COMPANIONS ORBITING HD 1684431 (2007)
Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, Michael C. Liu, Gregory Laughlin, Kevin Apps, ...
Precise Doppler measurements during 4.4 yr from the Keck/HIRES spectrometer reveal two superimposed Keplerian velocity variations for HD 168443 (G6 IV). A simultaneous orbital t to both companions...
A Second Planet Orbiting 47 UMa 1 (2007)
Debra A. Fischer, Geoffreyw. Marcy, R. Paulbutler, Gregory Laughlin
Precise Doppler velocity measurments during 13 years at Lick Observatory reveal the presence of two planets orbiting the star 47 UMa. The previously detected inner planet is confirmed by the newer...
Seven New Keck Planets Orbiting G And K Dwarfs (2007)
Paul Butler Geoffrey, R. Paul Butler, Geoffrey W. Marcy, Steven S. Vogt, Debra A. Fischer, Gregory W. Henry, ...
Planetary mass companions orbiting seven nearby G and K dwarfs have been found from the Keck Precision Doppler Survey. A " 51 Peg--like " planet orbiting HD 49674 has the smallest mass yet...
Scott Seagroves, Justin Harker, Gregory Laughlin, Justin Lacy, Tim Castellano
We describe a project (transitsearch.org) currently attempting to discover transiting intermediateperiod planets orbiting bright parent stars, and we simulate that project's performance. The...
Wolf, Aaron S., Laughlin, Gregory, Henry, Gregory W., Fischer, Debra A., Marcy, Geoff, Butler, Paul, ...
We report 35 radial velocity measurements of HD 149026 taken with the Keck Telescope. Of these measurements, 15 were made during the transit of the companion planet HD 149026b, which occurred on 2005...
Observational Consequences of Hydrodynamic Flows on Hot Jupiters (2007)
Langton, Jonathan, Laughlin, Gregory
We use a grid-based shallow water model to simulate the atmospheric dynamics of the transiting hot Jupiter HD 209458b. Under the usual assumption that the planet is in synchronous rotation with zero...
Sarah E. Robinson, Gregory Laughlin, Steven S. Vogt, Debra A. Fischer, R. Paul Butler, Geoffrey W. Marcy, ...
We report the discovery of two new planets: a 1.94 MJup planet in a 1.8 yr orbit of HD 5319, and a 2.51 MJup planet in a 1.1 yr orbit of HD 75898. The measured eccentricities are 0.12 for HD 5319b...
FIVE INTERMEDIATE-PERIOD PLANETS FROM THE N2K SAMPLE (2007)
Debra A. Fischer, Steven S. Vogt, Geoffrey W. Marcy, R. Paul Butler, Gregory W. Henry, Sarah Robinson, ...
We report the detection of five Jovian-mass planets orbiting high-metallicity stars. Four of these stars were first observed as part of the N2K program, and exhibited low rms velocity scatter after...
On the search for transits of the planets orbiting Gliese 876 (2006)
Shankland, P. D., Rivera, E. J., Laughlin, Gregory, Blank, D. L., Price, A., Gary, B., ...
[Abstract]: We report the results of a globally coordinated photometric campaign to search for transits by the P 30 d and P 60 d outer planets of the 3-planet system orbiting the nearbyM-dwarf Gl...
Relativistic Effects in Extrasolar Planetary Systems (2006)
Adams, Fred C., Laughlin, Gregory
This paper considers general relativistic (GR) effects in currently observed extrasolar planetary systems. Although GR corrections are small, they can compete with secular interactions in these...
The 2:1 resonant exoplanetary system orbiting HD735261 (2006)
Tinney, C. G., Butler, R. Paul, Marcy, Geoffrey W., Jones, Hugh R. A., Laughlin, Gregory, Carter, Brad D., ...
[Abstract]: We report the detection of a second exoplanet orbiting the G6V dwarf HD73526. This second planet has an orbital period of 377 d, putting it in a 2:1 resonance with the previously known...
Are Proxima and Alpha Centauri Gravitationally Bound? (2006)
Wertheimer, Jeremy G., Laughlin, Gregory
Using the most recent kinematic and radial velocity data in the literature, we calculate the binding energy of Proxima Centauri relative to the center of mass of the Alpha Centauri system. When we...
Effects of Secular Interactions in Extrasolar Planetary Systems (2006)
Adams, Fred C., Laughlin, Gregory
This paper studies the effects of dynamical interactions among the planets in observed extrasolar planetary systems, including hypothetical additional bodies, with a focus on secular perturbations....
Long Term Evolution of Close Planets Including the Effects of Secular Interactions (2006)
Adams, Fred C., Laughlin, Gregory
This paper studies the long term evolution of planetary systems containing short-period planets, including the effects of tidal circularization, secular excitation of eccentricity by companion...
The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Period Planets (2006)
Johnson, John A., Marcy, Geoffrey W., Fischer, Debra A., Laughlin, Gregory, Butler, R. Paul, Henry, Gregory W., ...
We present a modification to the iodine cell Doppler technique that eliminates the need for an observed stellar template spectrum. For a given target star, we iterate toward a synthetic template...
The 2:1 resonant exoplanetary system orbiting HD73526 (2006)
Tinney, C. G., Butler, R. Paul, Marcy, Geoffrey W., Jones, Hugh R. A., Laughlin, Gregory, Carter, Brad D., ...
We report the detection of a second exoplanet orbiting the G6V dwarf HD73526. This second planet has an orbital period of 377 d, putting it in a 2:1 resonance with the previously known exoplanet, the...
The 2:1 resonant exoplanetary system orbiting HD735261 (2006)
Tinney, C. G., Butler, R. Paul, Marcy, Geoffrey W., Jones, Hugh R. A., Laughlin, Gregory, Carter, Brad D., ...
[Abstract]: We report the detection of a second exoplanet orbiting the G6V dwarf HD73526. This second planet has an orbital period of 377 d, putting it in a 2:1 resonance with the previously known...
On the search for transits of the planets orbiting Gliese 876 (2006)
Shankland, P. D., Rivera, E. J., Laughlin, Gregory, Blank, D. L., Price, A., Gary, B., ...
[Abstract]: We report the results of a globally coordinated photometric campaign to search for transits by the P 30 d and P 60 d outer planets of the 3-planet system orbiting the nearbyM-dwarf Gl...
THE N2K CONSORTIUM. VI. DOPPLER SHIFTS WITHOUT TEMPLATES AND THREE NEW SHORT-PERIOD PLANETS 1 (2006)
John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Gregory Laughlin, R. Paul Butler, Gregory W. Henry, ...
We present a modification to the iodine cell Doppler technique that eliminates the need for an observed stellar template spectrum. For a given target star, we iterate toward a synthetic template...
The 2:1 resonant exoplanetary system orbiting HD 73526 (2006)
Tinney, C. G., Butler, R. Paul, Marcy, Geoffrey W., Jones, Hugh R. A., Laughlin, Gregory, Carter, Brad D., ...
[Abstract]: We report the detection of a second exoplanet orbiting the G6V dwarf HD73526. This second planet has an orbital period of 377 d, putting it in a 2:1 resonance with the previously known...
On the search for transits of the planets orbiting Gliese 876 (2006)
Shankland, P. D., Rivera, E. J., Laughlin, Gregory, Blank, D. L., Price, A., Gary, B., ...
[Abstract]: We report the results of a globally coordinated photometric campaign to search for transits by the P 30 d and P 60 d outer planets of the 3-planet system orbiting the nearbyM-dwarf Gl...
Aaron S. Wolf, Gregory Laughlin, Gregory W. Henry, Debra A. Fischer, Geoff Marcy, Paul Butler, ...
We report 35 radial velocity measurements of HD 149026 taken with the Keck Telescope. Of these measurements, 15 were made during the transit of the companion planet HD 149026b, which occurred on 2005...
Gregory Laughlin, Geoffrey W. Marcy, Steven S. Vogt, Debra A. Fischer, R. Paul Butler
We report 85 high-precision Doppler radial velocity measurements taken between 1999.5 and 2005.0 of the parent star of the transiting planet HD 209458b. We obtain an orbital fit to the 68 radial...
Eugenio J. Rivera, Jack J. Lissauer, R. Paul Butler, Geoffrey W. Marcy, Steven S. Vogt, Debra A. Fischer, ...
High-precision, high-cadence radial velocity monitoring over the past 8 yr at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The...
Debra A. Fischer, Gregory Laughlin, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, John A. Johnson, ...
We report the detection of two short-period planets discovered at Keck Observatory. HD 149143 is a metal-rich G0 IV star with a planet of M sin i 1:33MJ and an orbital radius of 0.053 AU. The...
Gregory Laughlin, Aaron Wolf, Tonny Vanmunster, Peter Bodenheimer, Debra Fischer, Geoff Marcy, ...
Two extrasolar planets, HD 209458b and TrES-1, are currently known to transit bright parent stars for which physical properties can be accurately determined. The two transiting planets have very...
TEN LOW-MASS COMPANIONS FROM THE KECK PRECISION VELOCITY SURVEY Steven S. Vogt, (2002)
Paul Butler Geoffrey, Steven S. Vogt, Geoffrey W. Marcy, Debra A. Fischer, Dimitri Pourbaix, Gregory Laughlin
Ten new companions have emerged from the Keck precision Doppler velocity survey, with minimum (M sin i) masses ranging from 0.8 M JUP to 0.34 M . Five of these are planet candidates with M sin i <...
A Second Planet Orbiting 47 Ursae Majoris (2002)
Debra A. Fischer, Geoffrey W. Marcy, R. Paul Butler, Gregory Laughlin, Steven S. Vogt
Precise Doppler velocity measurements during 13 yr at Lick Observatory reveal the presence of two planets orbiting the star 47 UMa. The previously detected inner planet is conrmed by the newer...
Astronomical Engineering: A Strategy For Modifying Planetary Orbits (2001)
Korycansky, D.G., Laughlin, Gregory, Adams, Fred C.
The Sun's gradual brightening will seriously compromise the Earth'sbiosphere within ∼ 10 9 years. If Earth's orbit migrates outward,however, the biosphere could remain intact over the...
Astronomical engineering: a strategy for modifying planetary orbits (2001)
Korycansky, D. G., Laughlin, Gregory, Adams, Fred C.
The Sun's gradual brightening will seriously compromise the Earth's biosphere within ~ 1E9 years. If Earth's orbit migrates outward, however, the biosphere could remain intact over the entire...
Constraints on the Birth Aggregate of the Solar System (2000)
Adams, Fred C., Laughlin, Gregory
Using the observed properties of our solar system, in particular the isotopic compositions of meteorites and the regularity of the planetary orbits, we constrain the star formation environment of the...
Protostellar Disk Formation and Early Evolution (2000)
Adams, Fred C., Laughlin, Gregory
This contribution describes the formation of circumstellar disks and their earliest evolutionary phases when self-gravity in the disk plays a crucial role in eliciting the transport of mass and...
A Dying Universe: The Long Term Fate and Evolution of Astrophysical Objects (1997)
Adams, Fred C., Laughlin, Gregory
This paper outlines astrophysical issues related to the long term fate of the universe. We consider the evolution of planets, stars, stellar populations, galaxies, and the universe itself over time...