TESS Archives

Lithium abundance and equivalent width vs Teff plots. Left: non-LTE Li abundance, log ǫ(Li), versus effective temperature, Teff. The targets of this work (blue filled dots) are plotted together with the targets from Biazzo et al. (2022) in grey open squares and the members of the Pleiades (∼100 Myr; Sestito & Randich 2005), Hyades (∼600 Myr; Cummings et al. 2017), and M67 (∼4.5 Gyr; Pasquini et al. 2008) clusters (in yellow crosses, red diamonds, and green triangles, respectively). Right: lithium equivalent width (EWLi) versus effective temperature. Here, the empirical model isochrones by Jeffries et al. (2023) at 50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 900 Myr, 1, 1.5, and 2 G. -- astro-ph.SR

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography

The GAPS Programme at TNG. LXI. Atmospheric Parameters and Elemental Abundances of TESS Young Exoplanet Host Stars

by Keith CowingSeptember 5, 2024September 5, 2024

The study of exoplanets at different evolutionary stages can shed light on their formation, migration, and evolution. The determination of exoplanet properties depends on the properties of their host stars. […]

Family portraits of the systems in the middle of the primary eclipse. The secondary moves horizontally across the disk of the primary. Shading for the secondary corresponds to the uncertainty in the posterior values of secondary radius. All systems are drawn to the same scale within boxes that are 6 R⊙ in length. -- astro-ph.SR

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

Five New Eclipsing Binaries With Low-mass Companions

by Keith CowingAugust 15, 2024August 15, 2024

Precise space-based photometry from the Transiting Exoplanet Survey Satellite results in a huge number of exoplanetary candidates. However, the masses of these objects are unknown and must be determined by […]

This artist's concept shows the exoplanet K2-33b transiting its host star. Many citizen science projects at NASA invite the public to use transit data to make discoveries about exoplanets. NASA/JPL-Caltech

Astronomy & Telescopes, Citizen Science / Open Science, Education and Outreach, Exoplanets, -moons, -comets, Press Release

How NASA Citizen Science Fuels Future Exoplanet Research

by Keith CowingAugust 15, 2024August 15, 2024

NASA’s upcoming flagship astrophysics missions, the Nancy Grace Roman Space Telescope and the Habitable Worlds Observatory, will study planets outside our solar system, known as exoplanets. Over 5,000 exoplanets have […]

Observed and best-fit model light-curves (one transit event) for WASP-79 b, WASP-94A b, WASP-131 b and WASP-82 b. For each observed transit, Top: the unprocessed light-curve (cyan), light-curve after wavelet denoising (magenta), the best-fit transit model (blue). Middle: the residual after modelling without GP regression (magenta), the mean (blue) and 1-σ interval (cyan) of the best-fit GP regression model. Bottom: mean residual flux (blue). The mean residual flux corresponds to the residual flux considering the mean of the best fit GP regression model. -- astro-ph.EP

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

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

by Keith CowingAugust 13, 2024August 13, 2024

Precise physical properties of the known transiting exoplanets are essential for their precise atmospheric characterization using modern and upcoming instruments. Leveraging the large volume of high SNR photometric follow-up data […]

Mean−subtracted RV data plotted in gray dotted points for each of the HARPS (top panel), ESPRESSO (middle panel), and PFS (bottom panel) instruments, along with separate model curves for the planet model (blue solid line), the GP model (green solid line) and the full planet + GP model (magenta solid line). The error bars include the jitter component 𝜎 for each instrument, which was added in quadrature to the RV error for each data point. -- astro-ph.EP

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

TOI-757 b: An Eccentric Transiting Mini-Neptune On Aa 17.5-d Orbit

by Keith CowingAugust 12, 2024August 10, 2024

We report the spectroscopic confirmation and fundamental properties of TOI-757 b, a mini-Neptune on a 17.5-day orbit transiting a bright star (V=9.7 mag) discovered by the TESS mission. We acquired […]

NIR AO imaging and sensitivity curve for TOI 5713 (Keck) and TOI 6002 (Palomar). Inset: Images of the central portion of the data. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Status Report

TESS Discovery of Two Super-Earths Orbiting the M-dwarf Stars TOI-6002 and TOI-5713 Near The Radius Valley

by Keith CowingAugust 10, 2024August 10, 2024

We present the validation of two TESS super-Earth candidates transiting the mid-M dwarfs TOI-6002 and TOI-5713 every 10.90 and 10.44 days, respectively. The first star (TOI-6002) is located 32.038±0.019 pc […]

Variation of the orbital radius as a function of the orientation of the line of sight for hyperbolic orbits. Two different orbital eccentricities (e ∈ {1.01, 1.2}) -- astro-ph.EP

Astrochemistry, Astrogeology, Astronomy & Telescopes, Beta Pictoris, Comets and Asteroids, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Exocomet Orbital Distribution Around Beta Pictoris

by Keith CowingAugust 3, 2024

The 23 Myr young star β Pictoris is a laboratory for planet formation studies given its observed debris disk, its two directly imaged super-Jovian planets, and the evidence of transiting […]

Schematics of the CIM inside of which is divided into several compartments by walls. SPECTR fits into the CIM as two removable cartridges: one containing the slit assembly and the other containing the collimator assembly, grism assembly, and imaging assembly. -- astro-ph.EP

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

SPECtrophotometer for TRansmission spectroscopy of exoplanets (SPECTR)

by Keith CowingAugust 1, 2024August 1, 2024

The SPECtrophotometer for TRansmission spectroscopy of exoplanets (SPECTR) is a new low-resolution optical (3800 Å – 6850 Å) spectrophotometer installed at the Bohyunsan Optical Astronomy Observatory (BOAO) 1.8 m telescope.

Segment of the β Pic light curve with the deepest exocomet transit. Top: Similar to the previous figure, it shows the normalized PDC_SAP flux with the harmonic content (blue dots), and the red line represents the modeled harmonic fluctuations. Bottom: Difference between the original flux and the modeled one binned in 30-minute intervals. -- astro-ph.EP

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, Beta Pictoris, Comets and Asteroids, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

Numerical Simulations of Exocomet Transits: Insights From BetaPic and KIC 3542116

by Keith CowingJuly 31, 2024July 31, 2024

In recent years, the topic of existence and exploration of exocomets has been gaining increasing attention. The asymmetrical decrease in the stellar brightness due to the passage of a comet-like […]

Radius-period distribution of the known young planet population. Planets are colored based on their ages, with darker purples representing the younger systems. TIC 434398831 b and c are denoted by the stars. We plot the distribution of the known exoplanet population in greyscale for reference. Both TIC 434398831 b and c lie above the mature exoplanet distribution. As they continue to evolve, both planets will likely evolve to lie in the Kepler distribution. -- astro-ph.EP

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

A Transiting Multi-planet System In The 61 Million Year Old Association Theia 116

by Keith CowingJuly 30, 2024July 30, 2024

Observing and characterizing young planetary systems can aid in unveiling the evolutionary mechanisms that sculpt the mature exoplanet population.

TESS

The GAPS Programme at TNG. LXI. Atmospheric Parameters and Elemental Abundances of TESS Young Exoplanet Host Stars

Five New Eclipsing Binaries With Low-mass Companions

How NASA Citizen Science Fuels Future Exoplanet Research

Precise Transit Photometry Using TESS II: Revisiting 28 Additional Transiting Systems With Updated Physical Properties

TOI-757 b: An Eccentric Transiting Mini-Neptune On Aa 17.5-d Orbit

TESS Discovery of Two Super-Earths Orbiting the M-dwarf Stars TOI-6002 and TOI-5713 Near The Radius Valley

Exocomet Orbital Distribution Around Beta Pictoris

SPECtrophotometer for TRansmission spectroscopy of exoplanets (SPECTR)

Numerical Simulations of Exocomet Transits: Insights From BetaPic and KIC 3542116

A Transiting Multi-planet System In The 61 Million Year Old Association Theia 116

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