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 ± 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 http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/631/A76- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 2019
- DOI:
- 10.1051/0004-6361/201936082
- arXiv:
- arXiv:1906.05254
- Bibcode:
- 2019A&A...631A..76H
- Keywords:
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- planets and satellites: individual: MASCARA-3;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 8 pages, 7 figures, 6 tables