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Frank Grundahl

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

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  • M. Hjorth
  • ,
  • S. Albrecht
  • G. J.J. Talens, HEC Montréal (Université de Montréal)
  • ,
  • F. Grundahl
  • A. B. Justesen
  • G. P.P.L. Otten, Aix-Marseille Université
  • ,
  • V. Antoci
  • ,
  • P. Dorval, Leiden Observatory Research Institute
  • ,
  • E. Foxell, University of Warwick
  • ,
  • M. Fredslund Andersen, Univ of Arhus
  • ,
  • F. Murgas, Instituto de Astrofísica de Canarias, La Laguna University
  • ,
  • E. Palle, Instituto de Astrofísica de Canarias, La Laguna University
  • ,
  • R. Stuik, Leiden Observatory Research Institute
  • ,
  • I. A.G. Snellen, Leiden Observatory Research Institute
  • ,
  • V. Van Eylen, Department of Astrophysical Sciences, Princeton University, Princeton University

We report the discovery of MASCARA-3b, a hot Jupiter orbiting its bright (V = 8.33) late F-type host every 5.55149 ± 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 ± 0.05 RJup and 4.2 ± 0.2 MJup. 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= 20.4 ± 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 λ = 1.2-7.4+8.2 deg, which is consistent with alignment.

Original languageEnglish
Article numberA76
JournalAstronomy and Astrophysics
Number of pages8
Publication statusPublished - 2019

    Research areas

  • Planets and satellites: individual: MASCARA-3

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