# Qatar Exoplanet Survey: Qatar-7b -- A Very Hot Jupiter Orbiting a Metal Rich F-Star

## TL;DR

Qatar-7b is a newly discovered very hot, inflated gas giant orbiting a metal-rich F-star, with extreme temperature and size, making it ideal for atmospheric studies.

## Contribution

This paper reports the discovery and characterization of Qatar-7b, a highly inflated hot Jupiter with unique properties among known exoplanets.

## Key findings

- Planet has a mass of 1.88 Mjup and radius of 1.70 Rjup.
- Orbital period is 2.032 days, with an equilibrium temperature of ~2100 K.
- Qatar-7b is among the top 6% hottest and largest known exoplanets.

## Abstract

We present the discovery of Qatar-7b --- a very hot and inflated giant gas planet orbiting close its parent star. The host star is a relatively massive main sequence F-star with mass and radius Mstar = 1.41 +/- 0.03 Msun and Rstar = 1.56 +/- 0.02 Rsun, respectively, at a distance d = 726 +/- 26 pc, and an estimated age ~1 Gyr. With its orbital period of P = 2.032 days the planet is located less than 5 stellar radii from its host star and is heated to a high temperature Teq ~ 2100 K. From a global solution to the available photometric and radial velocity observations, we calculate the mass and radius of the planet to be Mpl = 1.88 +/- 0.25 Mjup and Rpl = 1.70 +/- 0.03 Rjup, respectively. The planet radius and equilibrium temperature put Qatar-7b in the top 6% of the hottest and largest known exoplanets. With its large radius and high temperature Qatar-7b is a valuable addition to the short list of targets that offer the best opportunity for studying their atmospheres through transmission spectroscopy.