Explanipedia

HARPS-N Reveals a Well-aligned Orbit for the Highly Eccentric Warm Jupiter TOI-4127 b Open

Ismael Mireles, F. Murgas, Diana Dragomir, Ε. Πάλλη, Jiayin Dong , et al. · 2025

While many hot Jupiter systems have a measured obliquity, few warm Jupiter systems do. The longer orbital periods and transit durations of warm Jupiters make it more difficult to measure the obliquities of their host stars. However, the lo…

The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets<sup>*</sup> Open

Samuel W. Yee, Joshua N. Winn, J. D. Hartman, Joseph E. Rodriguez, George Zhou , et al. · 2025

We present the discovery of 30 transiting giant planets that were initially detected using data from NASA’s Transiting Exoplanet Survey Satellite mission. These new planets orbit relatively bright ( G ≤ 12.5) FGK host stars with orbital pe…

HD 35843: A Sun-like Star Hosting a Long-period Sub-Neptune and Inner Super-Earth Open

Katharine Hesse, Ismael Mireles, F. Bouchy, Diana Dragomir, Solène Ulmer-Moll , et al. · 2025

We report the discovery and confirmation of two planets orbiting the metal-poor Sun-like star HD 35843 (TOI 4189). HD 35843 c is a temperate sub-Neptune transiting planet with an orbital period of 46.96 days that was first identified by Pl…

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit Open

Zahra Essack, Diana Dragomir, Paul A. Dalba, Matthew P. Battley, David R. Ciardi , et al. · 2025

We report the discovery and confirmation of TOI-4465 b, a 1.25 R J , 5.89 M J ± 0.26 M J giant planet orbiting a G dwarf star at d ≃ 122 pc. The planet was detected as a single-transit event in data from Sector 40 of the Tran…

A Swarm of WASP Planets: Nine Giant Planets Identified by the WASP Survey Open

N. Schanche, G. Hébrard, Keivan G. Stassun, Benjamin J. Hord, Khalid Barkaoui , et al. · 2025

The Wide Angle Search for Planets (WASP) survey provided some of the first transiting hot Jupiter candidates. With the addition of the Transiting Exoplanet Survey Satellite (TESS), many WASP planet candidates have now been revisited and gi…

A transiting multiplanet system in the 61 Myr old association Theia 116 Open

Sydney Vach, George Zhou, Chelsea X. Huang, Andrew W. Mann, Madyson G. Barber , et al. · 2025

Observing and characterizing young planetary systems can aid in unveiling the evolutionary mechanisms that sculpt the mature exoplanet population. As an all-sky survey, NASA’s Transiting Exoplanet Survey Satellite (TESS) has expanded the k…

HD 35843: A Sun-like star hosting a long period sub-Neptune and inner super-Earth Open

Katharine Hesse, Ismael Mireles, F. Bouchy, Diana Dragomir, Solène Ulmer-Moll , et al. · 2025

We report the discovery and confirmation of two planets orbiting the metal-poor Sun-like star, HD 35843 (TOI 4189). HD 35843 c is a temperate sub-Neptune transiting planet with an orbital period of 46.96 days that was first identified by P…

A Swarm of WASP Planets: Nine giant planets identified by the WASP survey Open

N. Schanche, Guillaume Hébrard, Keivan G. Stassun, Benjamin J. Hord, Khalid Barkaoui , et al. · 2025

The Wide Angle Search for Planets (WASP) survey provided some of the first transiting hot Jupiter candidates. With the addition of the Transiting Exoplanet Survey Satellite (TESS), many WASP planet candidates have now been revisited and gi…

Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994* Open

Romy Rodríguez Martínez, Jason D. Eastman, Karen A. Collins, Joseph E. Rodriguez, David Charbonneau , et al. · 2025

We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite. TOI-4994b transits a G-type star ( V = 12.6 mag) with a mass, radius, and…

Discovery and Characterization of an Eccentric, Warm Saturn Transiting the Solar Analog TOI-4994 Open

Romy Rodríguez Martínez, Jason D. Eastman, Karen A. Collins, Joseph Rodriguez, David Charbonneau , et al. · 2024

We present the detection and characterization of TOI-4994b (TIC 277128619b), a warm Saturn-sized planet discovered by the NASA Transiting Exoplanet Survey Satellite (TESS). TOI-4994b transits a G-type star (V = 12.6 mag) with a mass, radiu…

Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission Open

Jack Schulte, Joseph E. Rodriguez, Allyson Bieryla, Samuel N. Quinn, Karen A. Collins , et al. · 2024

Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery the mysteries surrounding their origins have remained. Here we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368…

HD 21520 b: a warm sub-Neptune transiting a bright G dwarf Open

Molly Nies, Ismael Mireles, F. Bouchy, Diana Dragomir, Belinda Nicholson , et al. · 2024

We report the discovery and validation of HD 21520 b, a transiting planet found with Transiting Exoplanet Survey Satellite and orbiting a bright G dwarf (V = 9.2, $T_{\rm eff} = 5871 \pm 62$ K, $R_{\star } = 1.04\pm 0.02\, {\rm R}_{\odot }…

Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b Open

I. Carleo, O. Barragán, C. M. Persson, M. Fridlund, K. W. F. Lam , et al. · 2024

Context. Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters. This challenges our understanding of their actual origin. Aims. We re…

Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b Open

I. Carleo, O. Barragán, Carina M. Persson, M. Fridlund, K. W. F. Lam , et al. · 2024

Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters, challenging our understanding on their actual origin. The present work, which …

A transiting multi-planet system in the 61 million year old association Theia 116 Open

Sydney Vach, George Zhou, Chelsea X. Huang, Andrew W. Mann, Madyson G. Barber , et al. · 2024

Observing and characterizing young planetary systems can aid in unveiling the evolutionary mechanisms that sculpt the mature exoplanet population. As an all-sky survey, NASA's Transiting Exoplanet Survey Satellite (TESS) has expanded the k…

Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission Open

Jack Schulte, Joseph E. Rodriguez, Allyson Bieryla, Samuel N. Quinn, Karen A. Collins , et al. · 2024

Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery the mysteries surrounding their origins have remained. Here we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368…

Evolution of BD-14 3065b (TOI-4987b) from giant planet to brown dwarf as possible evidence of deuterium burning at old stellar ages Open

J. Šubjak, David W. Latham, Samuel N. Quinn, P. Berlind, M. Calkins , et al. · 2024

The present study confirms BD-14 3065b as a transiting planet-brown dwarf in a triple-star system, with a mass near the deuterium-burning boundary. BD-14 3065b has the largest radius observed within the sample of giant planets and brown dw…

HD 21520 b: a warm sub-Neptune transiting a bright G dwarf Open

Molly Nies, Ismael Mireles, F. Bouchy, Diana Dragomir, Belinda Nicholson , et al. · 2024

We report the discovery and validation of HD 21520 b, a transiting planet found with TESS and orbiting a bright G dwarf (V=9.2, $T_{eff} = 5871 \pm 62$ K, $R_{\star} = 1.04\pm 0.02\, R_{\odot}$). HD 21520 b was originally alerted as a syst…

BD-14 3065b (TOI-4987b): from giant planet to brown dwarf: evidence for deuterium burning in old age? Open

J. Šubjak, David W. Latham, Samuel N. Quinn, P. Berlind, M. Calkins , et al. · 2024

The present study reports the confirmation of BD-14 3065b, a transiting planet/brown dwarf in a triple-star system, with a mass near the deuterium burning boundary. BD-14 3065b has the largest radius observed within the sample of giant pla…

TOI-1994b: A Low-mass Eccentric Brown Dwarf Transiting A Subgiant Star Open

Emma Page, Joshua Pepper, D. J. Wright, Joseph E. Rodriguez, Robert A. Wittenmyer , et al. · 2024

We present the discovery of TOI-1994b, a low-mass brown dwarf transiting a hot subgiant star on a moderately eccentric orbit. TOI-1994 has an effective temperature of K, V magnitude of 10.51 mag and log( g ) of . The br…

Migration and Evolution of giant ExoPlanets (MEEP) I: Nine Newly Confirmed Hot Jupiters from the TESS Mission Open

Jack Schulte, Joseph E. Rodriguez, Allyson Bieryla, Samuel N. Quinn, Karen A. Collins , et al. · 2024

Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery, the mysteries surrounding their origins remain. Here, we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368 b, T…

TOI-4641b: an aligned warm Jupiter orbiting a bright (<i>V</i>=7.5) rapidly rotating F-star Open

Allyson Bieryla, George Zhou, Juliana García‐Mejía, Tyler R. Fairnington, David W. Latham , et al. · 2023

We report the discovery of TOI-4641b, a warm Jupiter transiting a rapidly rotating F-type star with a stellar effective temperature of 6560 K. The planet has a radius of 0.73 RJup, a mass smaller than 3.87 MJup(3σ), and a period of 22.09 d…

TOI-4641b: An Aligned Warm Jupiter Orbiting a Bright (V=7.5) Rapidly Rotating F-star Open

Allyson Bieryla, George Zhou, Juliana García‐Mejía, Tyler R. Farnington, David W. Latham , et al. · 2023

We report the discovery of TOI-4641b, a warm Jupiter transiting a rapidly rotating F-type star with a stellar effective temperature of 6560 K. The planet has a radius of 0.73 $R_{Jup}$, a mass smaller than 3.87 $M_{Jup}$ $(3σ)$, and a peri…

Separated Twins or Just Siblings? A Multiplanet System around an M Dwarf Including a Cool Sub-Neptune Open

M. Harris, Diana Dragomir, Ismael Mireles, Karen A. Collins, Solène Ulmer-Moll , et al. · 2023

We report the discovery of two TESS sub-Neptunes orbiting the early M dwarf TOI-904 (TIC 261257684). Both exoplanets, TOI-904 b and c, were initially observed in TESS Sector 12 with twin sizes of and R ⊕ , respectively.…

Separated twins or just siblings? A multi-planet system around an M dwarf including a cool sub-Neptune Open

M. Harris, Diana Dragomir, Ismael Mireles, Karen A. Collins, Solène Ulmer-Moll , et al. · 2023

We report the discovery of two TESS sub-Neptunes orbiting the early M dwarf TOI-904 (TIC 261257684). Both exoplanets, TOI-904 b and c, were initially observed in TESS Sector 12 with twin sizes of ${2.426}_{-0.157}^{+0.163}$ and ${2.167}_{-…

TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica Open

Mélissa J. Hobson, Trifon Trifonov, Thomas Henning, Andrés Jordán, Felipe Rojas , et al. · 2023

We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a…

TOI-199 b: A well-characterized 100-day transiting warm giant planet with TTVs seen from Antarctica Open

Mélissa J. Hobson, Trifon Trifonov, Thomas Henning, Andrés Jordán, Felipe Rojas , et al. · 2023

We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a…

A Massive Hot Jupiter Orbiting a Metal-rich Early M Star Discovered in the TESS Full-frame Images Open

Tianjun Gan, Charles Cadieux, Farbod Jahandar, Allona Vazan, Sharon X. Wang , et al. · 2023

Observations and statistical studies have shown that giant planets are rare around M dwarfs compared with Sun-like stars. The formation mechanism of these extreme systems has remained under debate for decades. With the help of the TESS mis…

TOI-4600 b and c: Two Long-period Giant Planets Orbiting an Early K Dwarf Open

Ismael Mireles, Diana Dragomir, H. P. Osborn, Katharine Hesse, Karen A. Collins , et al. · 2023

We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 ( V = 12.6, T = 11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Singl…

TOI-4600 b and c: Two long-period giant planets orbiting an early K dwarf Open

Ismael Mireles, Diana Dragomir, H. P. Osborn, Katharine Hesse, Karen A. Collins , et al. · 2023

We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 (V=12.6, T=11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Tra…

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