HATS-47b, HATS-48Ab, HATS-49b and HATS-72b: Four Warm Giant Planets Transiting K Dwarfs

Abstract

We report the discovery of four transiting giant planets around K dwarfs. The planets HATS-47b, HATS-48Ab, HATS-49b, and HATS-72b have masses of $0.369_{-0.021}^{+0.031}$ $M_J$, $0.243_{-0.030}^{+0.022}$ $M_J$, $0.353_{-0.027}^{+0.038}$ $M_J$ and $0.1254\pm 0.0039$ $M_J$, respectively, and radii of $1.117\pm 0.014$ $R_J$, $0.800\pm 0.015$ $R_J$, $0.765\pm 0.013$ $R_J$, and $0.7224\pm 0.0032$ $R_J$, respectively. The planets orbit close to their host stars with orbital periods of $3.9228$ d, $3.1317$ d, $4.1480$ d and $7.3279$ d, respectively. The hosts are main sequence K dwarfs with masses of $0.674_{-0.012}^{+0.016}$ $M_{\odot }$, $0.7279\pm 0.0066$ $M_{\odot }$, $0.7133\pm 0.0075$ $M_{\odot }$, and $0.7311\pm 0.0028$ $M_{\odot }$ and with $V$-band magnitudes of $V=14.829\pm 0.010$, $14.35\pm 0.11$, $14.998\pm 0.040$ and $12.469\pm 0.010$. The Super-Neptune HATS-72b (a.k.a.\ WASP-191b and TOI 294.01) was independently identified as a transiting planet candidate by the HATSouth, WASP and TESS surveys, and we present a combined analysis of all of the data gathered by each of these projects (and their follow-up programs). An exceptionally precise mass is measured for HATS-72b thanks to high-precision radial velocity (RV) measurements obtained with VLT/ESPRESSO, FEROS, HARPS and Magellan/PFS. We also incorporate TESS observations of the warm Saturn-hosting systems HATS-47 (a.k.a. TOI 1073.01), HATS-48A and HATS-49. HATS-47 was independently identified as a candidate by the TESS team, while the other two systems were not previously identified from the TESS data. The RV orbital variations are measured for these systems using Magellan/PFS. HATS-48A has a resolved $5.{}^{\prime \prime }4$ neighbor in Gaia~DR2, which is a common-proper-motion binary star companion to HATS-48A with a mass of $0.22$ $M_{\odot }$ and a current projected physical separation of $\sim$1,400 au.

arXiv commentAccepted for publication in AJ. 32 pages, 14 figures, 7 tables

References in corpus (61)

• Astropy: A Community Python Package for Astronomy
• Gaia Data Release 2. Summary of the contents and survey properties
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Transiting Exoplanet Survey Satellite
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Analytic Lightcurves for Planetary Transit Searches
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• The K2 Mission: Characterization and Early results
• Detection of Planetary Transits Across a Sun-like Star
• The WASP Project and the SuperWASP Cameras
• Las Cumbres Observatory Global Telescope Network
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• Astrometry.net: Blind astrometric calibration of arbitrary astronomical images
• A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase
• Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
• A box-fitting algorithm in the search for periodic transits
• Automated data reduction workflows for astronomy
• Overview of the Kepler Science Processing Pipeline
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
• The Mass-Metallicity Relation for Giant Planets
• HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field
• The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large-Area Synoptic Surveys
• Efficient identification of exoplanetary transit candidates from SuperWASP light curves
• A correlation between the heavy element content of transiting extrasolar planets and the metallicity of their parent stars
• The Wide Field Spectrograph (WiFeS)
• Water Vapor and Clouds on the Habitable-Zone Sub-Neptune Exoplanet K2-18b
• A Trend Filtering Algorithm for wide field variability surveys
• Water vapour in the atmosphere of the habitable-zone eight Earth-mass planet K2-18 b
• On Galactic density modeling in the presence of dust extinction
• Transiting exoplanets from the CoRoT space mission II. CoRoT-Exo-2b: A transiting planet around an active G star
• SOAR TESS Survey. I: Sculpting of TESS planetary systems by stellar companions
• CERES: A Set of Automated Routines for Echelle Spectra
• HATSouth: a global network of fully automated identical wide-field telescopes
• HAT-P-26b: A Neptune-Mass Exoplanet with a Well Constrained Heavy Element Abundance
• TESS Discovery of a Transiting Super-Earth in the $\pi$ Mensae System
• Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
• HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars
• The KELT-South Telescope
• FITSH -- a software package for image processing
• Two Classes of Hot Jupiters
• HATS-6b: A Warm Saturn Transiting an Early M Dwarf Star, and a Set of Empirical Relations for Characterizing K and M Dwarf Planet Hosts
• A new method to compute limb-darkening coefficients for stellar atmosphere models with spherical symmetry: the space missions TESS, Kepler, Corot, and MOST
• WASP-80b: a gas giant transiting a cool dwarf
• Measuring the Recoverability of Close Binaries in Gaia DR2 with the Robo-AO Kepler Survey
• HATS-1b: The First Transiting Planet Discovered by the HATSouth Survey
• Fundamental properties of lower main-sequence stars
• HATS-4b: A Dense Hot-Jupiter Transiting a Super Metal-Rich G Star
• ZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance from Spectra
• Investigating hot-Jupiter inflated radii with hierarchical Bayesian modelling
• HATS-3b: An inflated hot Jupiter transiting an F-type star
• WASP-64b and WASP-72b: two new transiting highly irradiated giant planets
• Qatar-2: A K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit
• WTS-2 b: a hot Jupiter orbiting near its tidal destruction radius around a K-dwarf
• HAT-P-15b: A 10.9-day Extrasolar Planet Transiting a Solar-type Star
• Non-Linearity Corrections and Statistical Uncertainties Associated with Near-Infrared Arrays
• HATS-60b - HATS-69b: Ten Transiting Planets From HATSouth
• HATS-25b through HATS-30b: A Half-dozen New Inflated Transiting Hot Jupiters from the HATSouth Survey
• A hot Jupiter transiting a mid-K dwarf found in the pre-OmegaCam Transit Survey
• HATS-71b: A giant planet transiting an M3 dwarf star in TESS Sector 1
• Data Analysis for Precision Spectroscopy: the ESPRESSO Case

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• TESS Transit Timing of Hundreds of Hot Jupiters
• ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
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• A detailed analysis of the Gl 486 planetary system
• Characterisation of 92 Southern TESS Candidate Planet Hosts and a New Photometric [Fe/H] Relation for Cool Dwarfs
• Measuring Tidal Dissipation in Giant Planets from Tidal Circularization
• Detection capability of ground-based meter-sized telescopes for shallow exoplanet transits
• Three Hot Jupiters transiting K-dwarfs with a significant heavy element mass
• Search for (sub)stellar companions of exoplanet hosts by exploring the second ESA-Gaia data release
• ExoEcho: Exoplanet Ephemerides Change Observations. III. A JWST Survey for Transit Timing Variations of 37 Exoplanets