MASCARA-3b. A hot Jupiter transiting a bright F7 star in an aligned orbit - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2019

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

M. Hjorth
  • Function : Author
S. Albrecht
  • Function : Author
G. J. J. Talens
  • Function : Author
F. Grundahl
A. B. Justesen
V. Antoci
  • Function : Author
P. Dorval
  • Function : Author
E. Foxell
  • Function : Author
M. Fredslund Andersen
  • Function : Author
F. Murgas
E. Palle
  • Function : Author
R. Stuik
I. A. G. Snellen
  • Function : Author
V. van Eylen
  • Function : Author


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.

Reduced photometry and RV measurements are also available at the CDS via anonymous ftp to ( or via

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insu-03666710 , version 1 (12-05-2022)



M. Hjorth, S. Albrecht, G. J. J. Talens, F. Grundahl, A. B. Justesen, et al.. MASCARA-3b. A hot Jupiter transiting a bright F7 star in an aligned orbit. Astronomy and Astrophysics - A&A, 2019, 631, ⟨10.1051/0004-6361/201936082⟩. ⟨insu-03666710⟩
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