Unveiling the Cosmic Secrets: Uncovering Rocky Planets in Nearby Star Systems
In a thrilling journey through the TESS data, the Hidden Gems project has uncovered two remarkable rocky planets orbiting nearby M dwarf stars. This discovery, made possible by the specialized Sherlock pipeline, adds to our understanding of the diverse planetary systems in our cosmic neighborhood.
The Hunt for Hidden Gems
The Hidden Gems project is an ambitious endeavor to explore the TESS data for additional planets transiting low-mass stars. Our mission is to identify those elusive planet candidates that have remained hidden, below the detection threshold of the SPOC and QLP pipelines. With Sherlock, a robust tool designed specifically for this purpose, we've been able to uncover these hidden treasures.
Unveiling TOI-237 and TOI-4336 A
We proudly present the discovery of two inner rocky planets, TOI-237 c and TOI-4336 A c, in their respective systems. These planets were confirmed using ground-based photometry from various facilities, including TRAPPIST, SPECULOOS, ExTrA, and LCO. TOI-237 c, with a radius of 1.21 +/- 0.04Re, orbits its mid-M host star every 1.74 days, and is in an intriguing 3:1 mean-motion resonance with TOI-237 b. TOI-4336 A c, with a radius of 1.17 +/- 0.06Re, orbits an M3.5 host star in a hierarchical triple system, with a period of 7.58 days.
Unraveling the Dynamics
To understand the dynamics of these systems, we performed model comparisons to search for non-zero eccentricities. Interestingly, the circular transit models were statistically favored, indicating stable and predictable orbits. Dynamical simulations further confirmed the stability of both systems. For the TOI-237 system, we expect TTVs (Transit Timing Variations) to be on the order of seconds, adding to the precision of our observations.
The Significance of Warm Super-Earths
TOI-237 c and TOI-4336 A c join a select group of warm super-Earths, located below the so-called "radius valley." These planets are of particular interest to astrobiologists and exoplanet researchers, as they offer a unique opportunity to study the characteristics of potentially habitable worlds. TOI-237 c, with its small host star and short orbital period, is an excellent candidate for phase curve observations with JWST/MIRI, providing valuable insights into its atmospheric properties.
The Team Behind the Discovery
This groundbreaking work is a collaborative effort led by Mathilde Timmermans, with contributions from a diverse team of experts, including M. Dévora-Pajares, F. J. Pozuelos, K. Barkaoui, and many others. Their dedication and expertise have brought us one step closer to unraveling the mysteries of our cosmic neighborhood.
A Call for Discussion
As we delve deeper into the world of exoplanets, we invite you to join the conversation. What do you think about these hidden gems? Are they a sign of a vast and diverse universe, or do they challenge our understanding of planetary formation? Share your thoughts and let's explore the possibilities together! Remember, in the vastness of space, every discovery is a step towards a greater understanding of our place in the cosmos.
