Refined stellar, orbital and planetary parameters of the eccentric HAT-P-2 planetary system
arXiv:0908.1705 · doi:10.1111/j.1365-2966.2009.15849.x
Abstract
We present refined parameters for the extrasolar planetary system HAT-P-2 (also known as HD 147506), based on new radial velocity and photometric data. HAT-P-2b is a transiting extrasolar planet that exhibits an eccentric orbit. We present a detailed analysis of the planetary and stellar parameters, yielding consistent results for the mass and radius of the star, better constraints on the orbital eccentricity, and refined planetary parameters. The improved parameters for the host star are M_star = 1.36 +/- 0.04 M_sun and R_star = 1.64 +/- 0.08 R_sun, while the planet has a mass of M_p = 9.09 +/- 0.24 M_Jup and radius of R_p = 1.16 +/- 0.08 R_Jup. The refined transit epoch and period for the planet are E = 2,454,387.49375 +/- 0.00074 (BJD) and P = 5.6334729 +/- 0.0000061 (days), and the orbital eccentricity and argument of periastron are e = 0.5171 +/- 0.0033 and omega = 185.22 +/- 0.95 degrees. These orbital elements allow us to predict the timings of secondary eclipses with a reasonable accuracy of ~15 minutes. We also discuss the effects of this significant eccentricity including the characterization of the asymmetry in the transit light curve. Simple formulae are presented for the above, and these, in turn, can be used to constrain the orbital eccentricity using purely photometric data. These will be particularly useful for very high precision, space-borne observations of transiting planets.
Revised version, accepted for publication in MNRAS, 11 pages, 6 figures
References in corpus (23)
- Detection of Thermal Emission from an Extrasolar Planet
- Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
- Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
- HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
- Misaligned spin-orbit in the XO-3 planetary system?
- HD147506b: A Super-Massive Planet in an Eccentric Orbit Transiting a Bright Star
- XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star
- TASS Mark IV Photometric Survey of the Northern Sky
- Effects of Orbital Eccentricity on Extrasolar Planet Transit Detection and Lightcurves
- On the Spin-Orbit Misalignment of the XO-3 Exoplanetary System
- Properties of analytic transit light curve models
- The Transit Light Curve Project. VII. The Not-So-Bloated Exoplanet HAT-P-1b
- HAT-P-5b: A Jupiter-like hot Jupiter Transiting a Bright Star
- Planetary Systems in Binaries. I. Dynamical Classification
- HD 17156b: A Transiting Planet with a 21.2 Day Period and an Eccentric Orbit
- Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b
- The Transit Ingress and the Tilted Orbit of the Extraordinarily Eccentric Exoplanet HD 80606b
- Astrometry in Wide-field Surveys
- Refined parameters and spectroscopic transit of the super-massive planet HD147506b
- Measurement of the Spin-Orbit Angle of Exoplanet HAT-P-1b
- An analytical solution for Kepler's problem
- Tools for discovering and characterizing extrasolar planets
- Solving Linearized Equations of the -body Problem Using the Lie-integration Method
Cited by in corpus (61)
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
- Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
- Improved spectroscopic parameters for transiting planet hosts
- The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
- Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
- Evidence of Possible Spin-Orbit Misalignment Along the Line of Sight in Transiting Exoplanet Systems
- Tidal Evolution of Close-in Planets
- Orbital Phase Variations of the Eccentric Giant Planet HAT-P-2b
- Stellar obliquities in exoplanetary systems
- Simulating the escaping atmospheres of hot gas planets in the solar neighborhood
- HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars
- Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
- Mass-radius relationships for exoplanets
- Forward and Inverse Modeling of the Emission and Transmission Spectrum of GJ 436b: Investigating Metal Enrichment, Tidal Heating, and Clouds
- A Spitzer Transmission Spectrum for the Exoplanet GJ 436b, Evidence for Stellar Variability, and Constraints on Dayside Flux Variations
- Kepler-7b: A Transiting Planet with Unusually Low Density
- A Detection Of H-alpha In An Exoplanetary Exosphere
- Calibration of Equilibrium Tide Theory for Extrasolar Planet Systems II
- Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
- TESS Transit Timing of Hundreds of Hot Jupiters
- A small survey of the magnetic fields of planet-host stars
- Discovery of the Transiting Planet Kepler-5b
- Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse
- CoRoT-10b: a giant planet in a 13.24 day eccentric orbit
- Tidal Dissipation and Obliquity Evolution in Hot Jupiter Systems
- SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet
- Empirical limb-darkening coefficients & transit parameters of known exoplanets from TESS
- A Survey of Alkali Line Absorption in Exoplanetary Atmospheres
- A high binary fraction for the most massive close-in giant planets and brown dwarf desert members
- ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
- A simple model of the reflection effect for the interacting binaries and extrasolar planets
- KELT-3b: A Hot Jupiter Transiting a V=9.8 Late-F Star
- HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and Observational Evidence for the Re-Inflation of Close-In Giant Planets
- Transit Variability in Bow Shock-Hosting Planets
- Kepler Observations of Transiting Hot Compact Objects
- Friends of Hot Jupiters III: An Infrared Spectroscopic Search for Low-Mass Stellar Companions
- The Time Dependence of hot Jupiters' Orbital Inclinations
- Atmospheric Circulation of Eccentric Hot Jupiter HAT-P-2b
- High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
- A Correlation Between Stellar Activity and the Surface Gravity of Hot Jupiters
- Using Stellar Densities to Evaluate Transiting Exoplanetary Candidates
- Radial velocities from the N2K Project: 6 new cold gas giant planets orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810
- Constraints on the Atmospheric Circulation and Variability of the Eccentric Hot Jupiter XO-3b
- Spectroscopic parameters for solar-type stars with moderate/high rotation. New parameters for 10 planet-hosts
- How Low Can You Go? The Photoeccentric Effect for Planets of Various Sizes
- Investigating Trends in Atmospheric Compositions of Cool Gas Giant Planets Using Spitzer Secondary Eclipses
- Exoplanets from the Arctic: The First Wide-Field Survey at 80 Degrees North
- Variable Irradiation on 1D Cloudless Eccentric Exoplanet Atmospheres
- Analysis of radial velocity variations in multiple planetary systems
- Determining Empirical Stellar Masses and Radii Using Transits and Gaia Parallaxes as Illustrated by Spitzer Observations of KELT-11b
- How to Characterize the Atmosphere of a Transiting Exoplanet
- Prospecting transit duration variations in extrasolar planetary systems
- Colour-magnitude diagrams of transiting Exoplanets -- III. A public code, nine strange planets, and the role of Phosphine
- Affordable echelle spectroscopy of the eccentric HAT-P-2, WASP-14 and XO-3 planetary systems with a sub-meter-class telescope
- New approach for modeling of transiting exoplanets for arbitrary limb-darkening law
- Reassessing Exoplanet Light Curves with a Thermal Model
- Characterization of exoplanetary atmospheres through a model-unbiased spectral survey methodology
- Possible Outcomes of Coplanar High-eccentricity Migration: Hot Jupiters, Close-in Super-Earths, and Counter-orbiting Planets
- New Exoplanet Surveys in the Canadian High Arctic at 80 Degrees North
- Understanding exoplanet formation, structure and evolution in 2010
- Examining the detectability of ringing on highly eccentric exoplanets