# WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption

@inproceedings{Delrez2015WASP121BA,
title={WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption},
author={Laetitia Delrez and Alexandre Santerne and Jose M. Almenara and D. R. Anderson and Andrew Collier-Cameron and Rodrigo F. D'iaz and Micha{\"e}l Gillon and Coel Hellier and Emmanuel Jehin and Monika Lendl and P. F. L. Maxted and Marion Neveu-VanMalle and Francesco A. Pepe and Don Pollacco and Didier Queloz and Damien S'egransan and Barry Smalley and A M S Smith and Amaury H. M. J. Triaud and St{\'e}phane Udry and Val{\'e}rie Van Grootel and Richard G. West},
year={2015}
}
• Published 8 June 2015
• Physics, Geology
We present the discovery by the WASP-South survey, in close collaboration with the Euler and TRAPPIST telescopes, of WASP-121 b, a new remarkable shortperiod transiting hot Jupiter, whose planetary nature has been statistically validated by the PASTIS software. The planet has a mass of 1.183 −0.062 MJup, a radius of 1.865 ± 0.044 RJup, and transits every 1.2749255 −0.0000025 days an active F6-type main-sequence star (V=10.4, 1.353 −0.079 M , 1.458 ± 0.030 R , Teff = 6460 ± 140 K). A notable…

## Figures and Tables from this paper

### TOI-2109: An Ultrahot Gas Giant on a 16 hr Orbit

• Physics, Geology
The Astronomical Journal
• 2021
We report the discovery of an ultrahot Jupiter with an extremely short orbital period of 0.67247414 ± 0.00000028 days (∼16 hr). The 1.347 ± 0.047 R Jup planet, initially identified by the Transiting

### TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in Its Atmosphere

• Physics, Geology
The Astronomical Journal
• 2021
We present the discovery of TOI-1518b—an ultra-hot Jupiter orbiting a bright star (V = 8.95). The transiting planet is confirmed using high-resolution optical transmission spectra from EXPRES. It is

### TOI-3362b: A Proto Hot Jupiter Undergoing High-eccentricity Tidal Migration

• Geology, Physics
The Astrophysical Journal Letters
• 2021
High-eccentricity tidal migration is a possible way for giant planets to be placed in short-period orbits. If this happens often, one would expect to catch proto hot Jupiters on highly elliptical

### Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer’s Secondary Eclipses

• Physics, Geology
The Astronomical Journal
• 2020
We report 78 secondary eclipse depths for a sample of 36 transiting hot Jupiters observed at 3.6 and 4.5 μm using the Spitzer Space Telescope. Our eclipse results for 27 of these planets are new, and

### A remnant planetary core in the hot-Neptune desert

• Physics, Geology
Nature
• 2020
Observations of TOI-849b reveal a radius smaller than Neptune’s but a large mass of about 40 Earth masses, indicating that the planet is the remnant core of a gas giant, which is likely to be enriched by water or other volatiles from the planetary interior.

### TESS Transit Timing of Hundreds of Hot Jupiters

• Physics, Geology
The Astrophysical Journal Supplement Series
• 2022
We provide a database of transit times and updated ephemerides for 382 planets based on data from the NASA Transiting Exoplanet Survey Satellite (TESS) and previously reported transit times, which

### Mass Loss by Atmospheric Escape from Extremely Close-in Planets

• Physics, Geology
The Astrophysical Journal
• 2022
We explore atmospheric escape from close-in exoplanets with the highest mass-loss rates. First, we locate the transition from stellar X-ray and UV-driven escape to rapid Roche lobe overflow, which

### Revisiting KELT-19Ab, WASP-156b, and WASP-121b in the TESS Era

• Geology, Physics
The Astronomical Journal
• 2022
We present a re-analysis of transit depths of KELT-19Ab, WASP-156b, and WASP-121b, including data from the Transiting Exoplanet Survey Satellite (TESS). The large ∼21″ TESS pixels and point-spread

### Five New Hot Jupiter Transits Investigated with Swift-UVOT

• Physics, Geology
The Astronomical Journal
• 2021
Short-wavelength exoplanet transit measurements have been used to probe mass loss in exoplanet atmospheres. We present the Swift-UVOT transit light curves for five hot Jupiters orbiting UV-bright

### The Hubble Space Telescope PanCET Program: Exospheric Mg ii and Fe ii in the Near-ultraviolet Transmission Spectrum of WASP-121b Using Jitter Decorrelation

• Physics, Geology
The Astronomical Journal
• 2019
We present Hubble Space Telescope (HST) near-ultraviolet (NUV) transits of the hot Jupiter WASP-121b, acquired as part of the PanCET program. Time-series spectra during two transit events were used

## References

SHOWING 1-10 OF 11 REFERENCES

### Exoplanets

• Geology, Physics
Proceedings of the National Academy of Sciences
• 2014
We are in the midst of a revolution in our understanding of planets in the Universe. In the last 20 years, 200-times more planets have been discovered beyond our solar system than reside within it.

### Keplerian Orbits and Dynamics of Exoplanets

• Geology, Physics
• 2010
Understanding the consequences of the gravitational interaction between a star and a planet is fundamental to the study of exoplanets. The solution of the two-body problem shows that the planet moves

### Physics, Formation and Evolution of Rotating Stars

Stellar Equilibrium With and Without Rotation.- The Mechanical Equilibrium of Stars.- The Mechanical Equilibrium of Rotating Stars.- The Energetic Equilibrium of Stars.- The Energy Conservation and

### PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC

Enter the text of the abstract in an " abstract " environment, i.e., within \begin{abstract} and \end{ab abstract} commands, within the context of the paper.

### The Observation and Analysis of Stellar Photospheres

This textbook describes the equipment, observational techniques, and analysis used in the investigation of stellar photospheres. Now in its fourth edition, the text has been thoroughly updated and

### THE MESSENGER

Recently NAFU SA and other role players expressed some criticism about government programmes. The criticism was not so much about the objectives and content of these programmes, but rather about