TESS Archives

TOI-2266 b’s location in the period-radius plane with the currently known planets orbiting M dwarfs. The planets without sufficiently precise density estimates are shown as grey crosses (From exoplanet.eu, accessed 2023 April 24), while the planets with well-constrained densities from the catalogue by Luque & Pallé (2022) are separated by their likely type: rocky planets are shown as black dots, water worlds as blue circles, and sub-Neptunes as green circles. The upper radius limits for rocky planets for the gas-depleted formation and thermally-driven mass loss scenarios are drawn as dashed lines. -- astro-ph.EP

TOI-2266 b: A Keystone Super-Earth At The Edge Of The M dwarf Radius Valley

by Keith CowingJanuary 24, 2024January 23, 2024

We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 348911) as a small transiting planet (most likely a super-Earth) orbiting a faint M5 dwarf (V=16.54) on […]

Best-fit model from combined fit, showing K2 (top) and TESS data (middle). The three planets are illustrated with different colors. The bottom panel presents phase folds of K2 and TESS data with the transit model. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

The Compact Multi-planet System GJ 9827 Revisited With ESPRESSO

by Keith CowingJanuary 16, 2024January 16, 2024

GJ 9827 is a bright, nearby K7V star orbited by two super-Earths and one mini-Neptune on close-in orbits. The system was first discovered using K2 data and then further characterized […]

The top panel shows the unflattened TESS light curve of HD 63433. The middle panel shows the flattened light curve with our three best-fit transit models for planets b, c, and d, as determined by our edmcmc outputs. The colors of these models correspond to each of the three planets as shown in the bottom panels, which depict the phase-folded light curves for each HD 63433 planet with binned data (red points) plotted over our best-fit models. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

TESS Hunt For Young And Maturing Exoplanets (THYME) XI: An Earth-sized Planet Orbiting a Nearby, Solar-like Host in the 400Myr Ursa Major Moving Group

by Keith CowingJanuary 14, 2024January 14, 2024

Young terrestrial worlds are critical test beds to constrain prevailing theories of planetary formation and evolution. We present the discovery of HD 63433d – a nearby (22pc), Earth-sized planet transiting […]

HD 63433d is the third planet found in orbit around a star called HD 63433.

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release

Earth-sized Planet HD 63433d Discovered In Our Solar Backyard

by Keith CowingJanuary 13, 2024January 13, 2024

A team of astronomers have discovered a planet closer and younger than any other Earth-sized world yet identified. It’s a remarkably hot world whose proximity to our own planet and […]

Like Kepler-10 b, illustrated above, the exoplanet HD 63433 d is a small, rocky planet in a tight orbit of its star. HD 63433 d is the smallest confirmed exoplanet younger than 500 million years old. It's also the closest discovered Earth-sized planet this young, at about 400 million years old. NASA/Ames/JPL-Caltech/T. Pyle

Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release

Earth-sized Planet HD 63433 d Has A Lava Hemisphere

by Keith CowingJanuary 12, 2024January 12, 2024

The discovery: In a system with two known planets, astronomers spotted something new: a small object transiting across the Sun-sized star. This turned out to be another planet: extra hot […]

Kepler-1409b, as listed in the Kepler catalog, orbits its host star KID 12405333 with a period of 0.76486 days. This transit period has been precisely detected by the GPFC method. In the top panel, a clear transit signal is visible in the folded light curve at this identified period of p=0.76486 days. Meanwhile, the bottom panel reveals a peak CNN score of 0.99999964 at the same period, along with another notable score of 0.995469 at its harmonic half-period of p=0.38243. -- astro-ph.EP

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Discovery of Small Ultra-short-period Planets Orbiting KG Dwarfs in Kepler Survey Using GPU Phase Folding and Deep Learning Detection System

by Keith CowingJanuary 2, 2024January 2, 2024

Since the discovery of the first hot Jupiter orbiting a solar-type star, 51 Peg, in 1995, more than 4000 exoplanets have been identified using various observational techniques.

Images of the TESS planet candidate TOI 4148.01 that show the difference in spatial resolution between seeing-limited ground-based observations and TESS data. We show a ground-based image from Pan-STARRS in the left panel and an image of the same field in TESS in the right panel. The cross marker shows the location of original target from TESS in both images and the circle shows the location of the actual signal of this TOI. While both of these stars are clearly visible and easily distinguished in the ground data from Pan-STARRS, the majority of the same field is completely blended in TESS. This blending results in many false positives for TESS. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

DEATHSTAR: A System For Confirming Planets And Identifying False Positive Signals In TESS Data Using Ground-based Time Domain Surveys

by Keith CowingDecember 13, 2023December 13, 2023

We present a technique for verifying or refuting exoplanet candidates from the Transiting Exoplanet Survey Satellite (TESS) mission by searching for nearby eclipsing binary stars using higher-resolution archival images from […]

Left: Histogram of the number of cold Jupiters that should be detected as a function of the size of the inner planet. Right: Scatter plot of stellar distance vs. stellar effective temperature of all TOIs. Color represents the probability of detecting the cold Jupiter. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Prospects From TESS And Gaia To Constrain The Flatness Of Planetary Systems

by Keith CowingDecember 11, 2023December 11, 2023

The mutual inclination between planets orbiting the same star provides key information to understand the formation and evolution of multi-planet systems.

Tracing a link between two neighbour planet at regular time interval along their orbits, creates a pattern unique to each couple. The six planets of the HD110067 system create together a mesmerising geometric pattern due to their resonance-chain. CREDIT Thibaut Roger/NCCR PlanetS

Astronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, TRAPPIST-1

Six Planets Orbit HD110067 System In A Harmonic Rhythm

by Keith CowingNovember 29, 2023April 14, 2026

An international collaboration between astronomers using the CHEOPS and TESS space satellites, including NCCR PlanetS members from the University of Bern and the University of Geneva, have found a key […]

This is an artist's concept of the nearby exoplanet LTT 1445Ac, which is the size of Earth. The planet orbits a red dwarf star. The star is in a triple system, with two closely orbiting red dwarfs seen at upper right. The black dot in front of the bright light-red sphere at image center is planet LTT 1445Ac transiting the face of the star. The planet has a surface temperature of roughly 500 degrees Fahrenheit. In the foreground at lower left is another planet in the system, LTT 1445Ab. The view is from 22 light-years away, looking back toward our Sun, which is the bright dot at lower right. Some of the background stars are part of the constellation Boötes. NASA, ESA, Leah Hustak (STScI)

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release

Hubble Measures the Size of the Nearest Transiting Earth-Sized Planet

by Keith CowingNovember 16, 2023November 16, 2023

NASA’s Hubble Space Telescope has measured the size of the nearest Earth-sized exoplanet that passes across the face of a neighboring star. This alignment, called a transit, opens the door […]

TESS

TOI-2266 b: A Keystone Super-Earth At The Edge Of The M dwarf Radius Valley

The Compact Multi-planet System GJ 9827 Revisited With ESPRESSO

TESS Hunt For Young And Maturing Exoplanets (THYME) XI: An Earth-sized Planet Orbiting a Nearby, Solar-like Host in the 400Myr Ursa Major Moving Group

Earth-sized Planet HD 63433d Discovered In Our Solar Backyard

Earth-sized Planet HD 63433 d Has A Lava Hemisphere

Discovery of Small Ultra-short-period Planets Orbiting KG Dwarfs in Kepler Survey Using GPU Phase Folding and Deep Learning Detection System

DEATHSTAR: A System For Confirming Planets And Identifying False Positive Signals In TESS Data Using Ground-based Time Domain Surveys

Prospects From TESS And Gaia To Constrain The Flatness Of Planetary Systems

Six Planets Orbit HD110067 System In A Harmonic Rhythm

Hubble Measures the Size of the Nearest Transiting Earth-Sized Planet

Relevance of the Avalon Assemblage as an Astrobiological Analog for Icy Ocean Worlds

The Climate and Potential Habitability of a Warm and Oxygenated Mars

Variable X-ray flux May Explain Variable Helium Escape From The Habitable-zone Exoplanet LHS 1140b

Spacetime Contactability in Galactic Civilization Networks: Contact Counts and Percolation

Surprisingly Enriched CO and CH4 in Halley-type Comet 13P/Olbers: Clues to Its Interstellar Heritage