MASCARA-1 b: A hot Jupiter transiting a bright $m_V=8.3$ A-star in a misaligned orbit

Abstract

We report the discovery of MASCARA-1 b, the first exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA). It is a hot Jupiter orbiting a bright $m_V=8.3$, rapidly rotating ($v\sin i_{\star }>100{\mathrm{km}\mathrm{s}}^{-1}$) A8 star with a period of $2.148780\pm 8\times 10^{-6}\mathrm{days}$. The planet has a mass and radius of $3.7\pm 0.9{\mathrm{M}}_{\mathrm{Jup}}$ and $1.5\pm 0.3{\mathrm{R}}_{\mathrm{Jup}}$, respectively. As with most hot Jupiters transiting early-type stars we find a misalignment between the planet orbital axis and the stellar spin axis, which may be signature of the formation and migration histories of this family of planets. MASCARA-1 b has a mean density of $1.5\pm 0.9\mathrm{g}\mathrm{c}{\mathrm{m}}^{-3}$ and an equilibrium temperature of $2570_{-30}^{+50}\mathrm{K}$, one of the highest temperatures known for a hot Jupiter to date. The system is reminiscent of WASP-33, but the host star lacks apparent delta-scuti variations, making the planet an ideal target for atmospheric characterization. We expect this to be the first of a series of hot Jupiters transiting bright early-type stars that will be discovered by MASCARA.

arXiv comment7 pages, 5 figures, Published in A&A. A typo in the value of the spectroscopic impact parameter was corrected

References in corpus (57)

• emcee: The MCMC Hammer
• Validation of the new Hipparcos reduction
• Analytic Lightcurves for Planetary Transit Searches
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• The WASP Project and the SuperWASP Cameras
• batman: BAsic Transit Model cAlculatioN in Python
• A box-fitting algorithm in the search for periodic transits
• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
• On the Unique Solution of Planet and Star Parameters from an Extrasolar Planet Transit Light Curve
• The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
• A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
• Hot Stars with Hot Jupiters Have High Obliquities
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
• Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
• Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
• Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
• HERMES: a high-resolution fibre-fed spectrograph for the Mercator telescope
• A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
• The signature of orbital motion from the dayside of the planet tau Bootis b
• Hubble Space Telescope Transmission Spectroscopy of the Exoplanet HD 189733b: High-altitude atmospheric haze in the optical and near-UV with STIS
• Chaotic star formation and the alignment of stellar rotation with disc and planetary orbital axes
• Line-profile tomography of exoplanet transits -- II. A gas-giant planet transiting a rapidly-rotating A5 star
• Evidence of Possible Spin-Orbit Misalignment Along the Line of Sight in Transiting Exoplanet Systems
• Theoretical Spectral Models of the Planet HD 209458b with a Thermal Inversion and Water Emission Bands
• Ground-based detection of sodium in the transmission spectrum of exoplanet HD209458b
• Fundamental parameters and infrared excesses of Hipparcos stars
• Internal Gravity Waves in Massive Stars: Angular Momentum Transport
• Exploring Exoplanet Populations with NASA's Kepler Mission
• Rotation and winds of exoplanet HD 189733 b measured with high-dispersion transmission spectroscopy
• A fast hybrid algorithm for exoplanetary transit searches
• Transiting exoplanets from the CoRoT space mission I - CoRoT-Exo-1b: a low-density short-period planet around a G0V star
• Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems
• Six New Planets from the Keck Precision Velocity Survey
• Low stellar obliquities in compact multiplanet systems
• Star-Disc-Binary Interactions in Protoplanetary Disc Systems and Primordial Spin-Orbit Misalignments
• A natural formation scenario for misaligned and short-period eccentric extrasolar planets
• 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
• Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems: II. Warped Discs
• Factors Affecting the Radii of Close-in Transiting Exoplanets
• Evidence against a strong thermal inversion in HD 209458 b from high-dispersion spectroscopy
• HAT-P-57b: A Short-Period Giant Planet Transiting A Bright Rapidly Rotating A8V Star Confirmed Via Doppler Tomography
• KELT-17b: A hot-Jupiter transiting an A-star in a misaligned orbit detected with Doppler tomography
• Kepler KOI-13.01 - Detection of beaming and ellipsoidal modulations pointing to a massive hot Jupiter
• First Results from the CHEPS: Exoplanets and the Discovery of an Eccentric Brown Dwarf in the Desert
• The Multi-site All-Sky CAmeRA: Finding transiting exoplanets around bright ($m_V<8$) stars
• Magnetic Origins of the Stellar Mass-Obliquity Correlation in Planetary Systems
• Bayesian mass and age estimates for transiting exoplanet host stars
• Detection of Planetary Emission from the Exoplanet TrES-2 using Spitzer /IRAC
• On the Tidal Dissipation of Obliquity
• DONUTS: A science frame autoguiding algorithm with sub-pixel precision, capable of guiding on defocused stars
• Multiwaveband photometry of the irradiated brown dwarf WD0137-349B
• A Search for Photometric Variability Towards M71 with the Near-Infrared Transiting ExoplanetS Telescope

Cited by in corpus (39)

• Stellar obliquities in exoplanetary systems
• MASCARA-2 b: A hot Jupiter transiting the $m_V=7.6$ A-star HD185603
• A Comprehensive Reanalysis of $\text{Spitzer}$'s 4.5 $\mu$m Phase Curves, and the Phase Variations of the Ultra-hot Jupiters MASCARA-1b and KELT-16b
• TOI-677 b: A Warm Jupiter (P=11.2d) on an eccentric orbit transiting a late F-type star
• High-resolution transmission spectroscopy study of ultra-hot Jupiters HAT-P-57b, KELT-17b, KELT-21b, KELT-7b, MASCARA-1b, and WASP-189b
• XUV Radiation from A-stars: Implications for Ultra-hot Jupiters
• Spi-OPS: Spitzer and CHEOPS confirm the near-polar orbit of MASCARA-1 b and reveal a hint of dayside reflection
• New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE and TRAPPIST-South
• KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System
• KELT-25b and KELT-26b: A Hot Jupiter and a Substellar Companion Transiting Young A-stars Observed by TESS
• Classifying Exoplanet Candidates with Convolutional Neural Networks: Application to the Next Generation Transit Survey
• WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b
• Transmission spectroscopy of MASCARA-1b with ESPRESSO: Challenges of overlapping orbital and Doppler tracks
• Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars
• Chemical analysis of early-type stars with planets
• Studying bright variable stars with the Multi-site All-Sky CAmeRA (MASCARA)
• High-resolution emission spectroscopy retrievals of MASCARA-1b with CRIRES+: Strong detections of CO, H${}_2$O and Fe emission lines and a C$/$O consistent with solar
• Combined analysis of stellar and planetary absorption lines via global forward-transit simulations
• HIP 33609 b: An Eccentric Brown Dwarf Transiting a V=7.3 Rapidly Rotating B-Star
• TOI-1842b: A Transiting Warm Saturn Undergoing Re-Inflation around an Evolving Subgiant
• Discovery of WASP-174b: Doppler tomography of a near-grazing transit
• The PEPSI Exoplanet Transit Survey. III: The detection of FeI, CrI and TiI in the atmosphere of MASCARA-1 b through high-resolution emission spectroscopy
• An Extreme-mass Ratio, Short-period Eclipsing Binary Consisting of a B Dwarf Primary and a Pre-main Sequence M Star Companion Discovered by KELT
• MASCARA-3b: A hot Jupiter transiting a bright F7 star in an aligned orbit
• Lack of close-in, massive planets of main-sequence A-type stars from Kepler
• Detection of rubidium and samarium in the atmosphere of the ultra-hot Jupiter MASCARA-4b
• WASP-190b: Tomographic discovery of a transiting hot Jupiter
• Data calibration for the MASCARA and bRing instruments
• New perspectives on MASCARA-1b: A combined analysis of pre- and post-eclipse emission data using CRIRES+
• NIGHT: a compact, near-infrared, high-resolution spectrograph to survey helium in exoplanet systems
• The Habitable Zones of Rapidly Rotating Main Sequence A/F Stars
• Bright Southern Variable Stars in the bRing Survey
• Spectroscopic Transit Search: a self-calibrating method for detecting planets around bright stars
• Discovery of a substellar companion in the TESS light curve of the $\delta$ Scuti/$\gamma$ Doradus hybrid pulsator HD 31221
• Are Am stars and hot-Jupiter planets related?
• A Substellar Companion to a Hot Star in K2's Campaign 0 Field
• The $\beta$ Pictoris b Hill sphere transit campaign. Paper II: Searching for the signatures of the $\beta$ Pictoris exoplanets through time delay analysis of the $\delta$ Scuti pulsations
• A First Look at CRIRES+: Performance Assessment and Exoplanet Spectroscopy
• TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in its Atmosphere