HAT-P-28b and HAT-P-29b: Two Sub-Jupiter Mass Transiting Planets

Abstract

We present the discovery of two transiting exoplanets. HAT-P-28b orbits a V=13.03 G3 dwarf star with a period P = 3.2572 d and has a mass of 0.63 +- 0.04 MJ and a radius of 1.21 + 0.11 -0.08 RJ yielding a mean density of 0.44 +- 0.09 g cm-3. HAT-P-29b orbits a V=11.90 F8 dwarf star with a period P = 5.7232 d and has a mass of 0.78 +0.08 -0.04 MJ and a radius of 1.11 +0.14 -0.08 RJ yielding a mean density of 0.71 +- 0.18 g cm-3. We discuss the properties of these planets in the context of other known transiting planets.

10 pages, 9 figures, submitted to ApJ on 17 January, 2011, accepted 24 March, 2011

References in corpus (27)

• Analytic Lightcurves for Planetary Transit Searches
• Color Transformations for the 2MASS Second Incremental Data Release
• Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
• Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
• Towards Better Age Estimates for Stellar Populations: The Y^2 Isochrones for Solar Mixture
• No planet for HD 166435
• Detection of Thermal Emission from an Extrasolar Planet
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search
• TrES-1: The Transiting Planet of a Bright K0V Star
• Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
• HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field
• HAT-P-16b: A 4 Mj Planet Transiting A Bright Star On An Eccentric Orbit
• Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System
• Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
• HD147506b: A Super-Massive Planet in an Eccentric Orbit Transiting a Bright Star
• TASS Mark IV Photometric Survey of the Northern Sky
• Two Classes of Hot Jupiters
• HAT-P-3b: A heavy-element rich planet transiting a K dwarf star
• Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
• Discerning Exoplanet Migration Models Using Spin-Orbit Measurements
• A Transiting Hot Jupiter Orbiting a Metal-Rich Star
• Spectroscopic binaries in a sample of ROSAT X-ray sources south of the Taurus molecular clouds
• HAT-P-6b: A Hot Jupiter transiting a bright F star
• The Nordic Optical Telescope
• An Independent Analysis of Kepler-4b through Kepler-8b
• An analytical solution for Kepler's problem

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• Improved spectroscopic parameters for transiting planet hosts
• The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
• Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
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• Constraining Tidal Dissipation in Stars from The Destruction Rates of Exoplanets
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• Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars
• Line-profile variations in radial-velocity measurements: Two alternative indicators for planetary searches
• ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
• HAT-P-65b and HAT-P-66b: Two Transiting Inflated Hot Jupiters and Observational Evidence for the Re-Inflation of Close-In Giant Planets
• Friends of Hot Jupiters III: An Infrared Spectroscopic Search for Low-Mass Stellar Companions
• Correlations between the stellar, planetary and debris components of exoplanet systems observed by $\text{Herschel}$
• ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
• Revisiting the correlation between stellar activity and planetary surface gravity
• HAT-P-25b: a Hot-Jupiter Transiting a Moderately Faint G Star
• HAT-P-31b,c: A Transiting, Eccentric, Hot Jupiter and a Long-Period, Massive Third-Body
• ExoClock Project: An open platform for monitoring the ephemerides of Ariel targets with contributions from the public
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• Transiting Exoplanet Monitoring Project (TEMP). II. Refined System Parameters and Transit Timing Analysis of HAT-P-33b
• Transiting Exoplanet Monitoring Project (TEMP). I. Refined System Parameters and Transit Timing Variations of HAT-P-29b
• The GAPS Programme at TNG: XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems
• Light Curve Analysis of Ground-Based Data from Exoplanets Transit Database
• Measuring Tidal Dissipation in Giant Planets from Tidal Circularization
• HATS-59b,c: A Transiting Hot Jupiter and a Cold Massive Giant Planet Around a Sun-Like Star
• Radius Study of Ten Transiting Hot Jupiter Exoplanets with Ground-Based Observations