T. Han

The Occurrence of Circumbinary Planets Around TESS M-dwarf Eclipsing Binaries

Dominic Oddo, Diana Dragomir, David V. Martin +2

We present the first determination of the occurrence of transiting circumbinary planets (CBPs) in TESS data. Since tight binaries represent a constrained environment relative to si…

The NEID Earth Twin Survey. VI. Discovery of a Low-Mass Planet Orbiting HD 126053 and RV Signals Near the Rotation Periods of HD 168009 and HD 10780

Arvind F. Gupta, Sarah E. Logsdon, Jacob K. Luhn +19

Extreme precision radial velocity (EPRV) spectrographs are making strides in extending the limits of radial velocity exoplanet detection. Perhaps the best evidence for this is how…

GEMS JWST: Hold on to your HATS(-6 b), a sub-solar metallicity giant planet with water, methane and ammonia in its atmosphere

Giannina Guzmán Caloca, Caleb I. Cañas, Nicole L. Wallack +16

HATS-6 b is one of several recently discovered Giant Exoplanets orbiting M-dwarf Stars (GEMS) and is part of a JWST survey that aims to compare bulk and atmospheric properties of t…

Revisiting the Exo-Mercury Candidate GJ 367 b with ESPRESSO and a Self-Consistent Tidal Distortion Model

Rena A. Lee, Fei Dai, Ellen M. Price +18

We report revised mass and radius measurements for GJ 367 b, an ultra-short-period (7.7 hr) sub-Earth in a multi-planet system orbiting a nearby (~9 pc) M dwarf host. Previous mass…

GEMS JWST: HATS-75 b -- A giant planet with a sub-solar metallicity atmosphere orbiting an M-dwarf

Reza Ashtari, Jacob Lustig-Yaeger, Jessica Libby-Roberts +12

HATS-75 b is one of the recently discovered Giant Exoplanets orbiting M-dwarf Stars (GEMS) with a transmission spectrum shaped by both its atmosphere and the active stellar surface…

Searching for GEMS: Three warm Saturns and a super-Jupiter orbiting four early M-dwarfs

Pranav H. Premnath, Paul Robertson, Shubham Kanodia +33

We report the confirmation and characterization of four transiting giant planets orbiting early-M dwarfs discovered by the Searching for Giant Exoplanets around M-dwarf Stars (GEMS…

QLP Data Release Notes 004: TESS-Gaia Light Curve Photometry Implementation

Glen Petitpas, Jack Haviland, Te Han +7

The Quick-Look Pipeline (QLP; Huang et al. 2020, Kunimoto et al. 2021 and references therein) generates light curves for up to 2 million stars every 27.4 days observed by TESS as p…

GEMS JWST: A sub-Solar metallicity atmosphere for giant planet TOI-5293Ab orbiting a rapidly changing M-dwarf

Shubham Kanodia, Caleb I. Cañas, Jacob Lustig-Yaeger +13

The growing sample of Giant Exoplanets around M-dwarf Stars (GEMS) helps probe the extremes of giant planet formation. Comparing the properties of this sample with their FGK counte…

Searching for GEMS: TOI-5916 b & TOI-6158 b are two Saturn-density planets orbiting M2 dwarfs

Shane O'Brien, Amber Wong, Te Han +20

We confirm the planetary nature of (1) TOI-5916 b and (2) TOI-6158 b, two Exoplanets Transiting M-dwarf Stars (GEMS), both discovered by the Transiting Exoplanet Survey Satellite (…

astro-ph.EP2025★ 1 cited

Searching for GEMS: The Occurrence of Giant Planets orbiting M-dwarfs within 100 pc

Rowen I. Glusman, Caleb I. Cañas, Shubham Kanodia +30

We present results from a systematic search for transiting short-period Giant Exoplanets around M-dwarf Stars (GEMS; $P < 10$ days, $R_{p} ≳ 8 R_{\oplus}$ ) within a distance-limi…

The NEID Earth Twin Survey. IV. Confirming an 89 d, $m sin i = 10 M_{\oplus}$ Planet Orbiting a Nearby Sun-like Star

Mark R. Giovinazzi, Evan Fitzmaurice, Arvind F. Gupta +19

We present the confirmation of HD 190360 d, a warm ( $P = 88.69 0_{- 0.049}^{+ 0.051} d$ ), low-mass ( $m sin i = 10.2 3_{- 0.80}^{+ 0.81} M_{\oplus}$ ) planet orbiting the nearb…

astro-ph.EP2025★ 12 cited

Searching for GEMS: TOI-7149~b an Inflated Giant Planet causing a 12% Transit of a Fully Convective M-dwarf

Shubham Kanodia, Caleb I. Cañas, Suvrath Mahadevan +20

We describe the discovery and characterization of TOI-7149~b, a 0.705 $\pm$ 0.075 $M_{J}$ , 1.18 $\pm$ 0.045 $R_{J}$ gas giant on a $\sim 2.65$ day period orbit transiting an M4V star w…

astro-ph.EP2025★ 2 cited

An Earth-Sized Planet in a 5.4h Orbit Around a Nearby K dwarf

Kaya Han Taş, Gudmundur Stefansson, Syarief N. M. Fariz +25

We present the discovery and confirmation of the ultra-short period (USP) planet TOI-2431 b orbiting a nearby ( $d \sim 36$ pc) late K star ( $T_{eff}$ = $4109 \pm 28 \, {\rm…

astro-ph.EP2025★ 1 cited

TOI-1259Ab: A Warm Jupiter Orbiting a K-dwarf White-Dwarf Binary is on a Well-aligned Orbit

Hugo Veldhuis, Juan I. Espinoza-Retamal, Gudmundur Stefansson +21

The evolution of one member of a stellar binary into a white dwarf has been proposed as a mechanism that triggers the formation of close-in gas giant planets. The star's asymmetric…

Hundreds of TESS exoplanets might be larger than we thought

Te Han, Paul Robertson, Timothy D. Brandt +5

The radius of a planet is a fundamental parameter that probes its composition and habitability. Precise radius measurements are typically derived from the fraction of starlight blo…

Searching for GEMS: Confirmation of TOI-5573b, a Cool, Saturn-like Planet Orbiting An M-dwarf

Rachel B Fernandes, Shubham Kanodia, Megan Delamer +35

We present the confirmation of TOI-5573b, a Saturn-sized exoplanet on an 8.79-day orbit around an early M-dwarf (3790 K, 0.59 R $⊙$ , 0.61 M $⊙$ , 12.30 J mag). TOI-5573b has a…

TOI-6324b: An Earth-Mass Ultra-Short-Period Planet Transiting a Nearby M Dwarf

Rena A. Lee, Fei Dai, Andrew W. Howard +71

We report the confirmation of TOI-6324 b, an Earth-sized (1.059 $\pm$ 0.041 R $_{\oplus}$ ) ultra-short-period (USP) planet orbiting a nearby ( $\sim$ 20 pc) M dwarf. Using the newly com…

astro-ph.EP2025★ 6 cited

GEMS JWST: Transmission spectroscopy of TOI-5205b reveals significant stellar contamination and a metal-poor atmosphere

Caleb I. Cañas, Jacob Lustig-Yaeger, Shang-Min Tsai +21

Recent discoveries of transiting giant exoplanets ( $R_{p} ≳ 8 R_{\oplus}$ ) around M dwarfs (GEMS) present an opportunity to investigate their atmospheric compositions and…

Jitter Across 15 Years: Leveraging Precise Photometry from Kepler and TESS to Extract Exoplanets from Radial Velocity Time Series

Corey Beard, Paul Robertson, Jack Lubin +24

Stellar activity contamination of radial velocity (RV) data is one of the top challenges plaguing the field of extreme precision RV (EPRV) science. Previous work has shown that pho…

Searching for GEMS: Two Super-Jupiters around M-dwarfs -- Signatures of Instability or Accretion?

Andrew Hotnisky, Shubham Kanodia, Jessica Libby-Roberts +20

We present the discovery of TOI-6303b and TOI-6330b, two massive transiting super-Jupiters orbiting a M0 and a M2 star respectively, as part of the Searching for GEMS survey. These…

A Fourth Planet in the Kepler-51 System Revealed by Transit Timing Variations

Kento Masuda, Jessica E. Libby-Roberts, John H. Livingston +49

Kepler-51 is a $≲ 1 Gyr$ -old Sun-like star hosting three transiting planets with radii $\approx 6$ - $9 R_{\oplus}$ and orbital periods $\approx 45$ -$130\,\mathrm{day…

Searching for GEMS: TOI-5688 A b, a low-density giant orbiting a high-metallicity early M-dwarf

Varghese Reji, Shubham Kanodia, Joe Ninan +31

We present the discovery of a low-density planet orbiting the high-metallicity early M-dwarf TOI-5688 A b. This planet was characterized as part of the search for transiting giant…

Searching for GEMS: Characterizing Six Giant Planets around Cool Dwarfs

Shubham Kanodia, Arvind F. Gupta, Caleb I. Canas +42

Transiting giant exoplanets around M-dwarf stars (GEMS) are rare, owing to the low-mass host stars. However, the all-sky coverage of TESS has enabled the detection of an increasing…