MASCARA-3b: A hot Jupiter transiting a bright F7 star in an aligned orbit

Abstract

We report the discovery of MASCARA-3b, a hot Jupiter orbiting its bright (V = 8.33) late F-type host every $5.55149\pm 0.00001$ days in an almost circular orbit ($e=0.050_{-0.017}^{+0.020}$). This is the fourth exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA), and the first of these that orbits a late-type star. Follow-up spectroscopic measurements were obtained in and out of transit with the Hertzsprung SONG telescope. Combining the MASCARA photometry and SONG radial velocities reveals a radius and mass of $1.36\pm 0.05$ $R_{\text{Jup}}$ and $4.2\pm 0.2$ $M_{\text{Jup}}$. In addition, SONG spectroscopic transit observations were obtained on two separate nights. From analyzing the mean out-of-transit broadening function, we obtain $v\sin i_{\star }=20.4\pm 0.4$ km s${}^{-1}$. In addition, investigating the Rossiter-McLaughlin effect, as observed in the distortion of the stellar lines directly and through velocity anomalies, we find the projected obliquity to be $\lambda =1.2_{-7.4}^{+8.2}$ deg, which is consistent with alignment.

arXiv comment8 pages, 7 figures, 6 tables; accepted in A&A. Updated for the accepted and proof-readed version

References in corpus (36)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• The Transiting Exoplanet Survey Satellite
• Analytic Lightcurves for Planetary Transit Searches
• The K2 Mission: Characterization and Early results
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• The WASP Project and the SuperWASP Cameras
• A box-fitting algorithm in the search for periodic transits
• The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
• EXOFAST: A fast exoplanetary fitting suite in IDL
• Hot Stars with Hot Jupiters Have High Obliquities
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• Origins of Hot Jupiters
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• A library of high resolution synthetic stellar spectra from 300nm to 1.8 micron with solar and alpha-enhanced composition
• The Kilodegree Extremely Little Telescope (KELT): A Small Robotic Telescope for Large-Area Synoptic Surveys
• Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
• The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
• On the diversity and statistical properties of protostellar discs
• Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
• Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities
• Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation
• Transiting exoplanets from the CoRoT space mission I - CoRoT-Exo-1b: a low-density short-period planet around a G0V star
• Improved Modeling of the Rossiter-McLaughlin Effect for Transiting Exoplanets
• Radial Velocity Studies of Close Binary Stars.VII. Methods and Uncertainties
• Low stellar obliquities in compact multiplanet systems
• The spin axes orbital alignment of both stars within the eclipsing binary system V1143Cyg using the Rossiter-McLaughlin effect
• First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her
• A Misaligned Prograde Orbit for Kepler-13 Ab via Doppler Tomography
• MASCARA-2 b: A hot Jupiter transiting the $m_V=7.6$ A-star HD185603
• Two Upper Limits on the Rossiter-McLaughlin Effect, with Differing Implications: WASP-1 has a High Obliquity and WASP-2 is Indeterminate
• The Multi-site All-Sky CAmeRA: Finding transiting exoplanets around bright ($m_V<8$) stars
• MASCARA-1 b: A hot Jupiter transiting a bright $m_V=8.3$ A-star in a misaligned orbit
• Conducting the SONG: The robotic nature and efficiency of a fully automated telescope
• KELT-24b: A 5M${}_{\mathrm{J}}$ Planet on a 5.6 day Well-Aligned Orbit around the Young V=8.3 F-star HD 93148
• Data calibration for the MASCARA and bRing instruments

Cited by in corpus (8)

• Stellar obliquities in exoplanetary systems
• TESS Transit Timing of Hundreds of Hot Jupiters
• A backward-spinning star with two coplanar planets
• The BAyesian STellar Algorithm (BASTA): a fitting tool for stellar studies, asteroseismology, exoplanets, and Galactic archaeology
• Obliquities of Exoplanet Host Stars: 19 New and Updated Measurements, and Trends in the Sample of 205 Measurements
• MASCARA-4 b/bRing-1b - A retrograde hot Jupiter around the bright A3V star HD 85628
• Precise Transit Photometry Using TESS: Updated Physical Properties for 28 Exoplanets Around Bright Stars
• The X-ray activity of F stars with hot Jupiters: KELT-24 versus WASP-18