J. Doty
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View article: A New Brown Dwarf Orbiting an M Star and an Investigation of the Eccentricity Distribution of Transiting Long-period Brown Dwarfs
A New Brown Dwarf Orbiting an M Star and an Investigation of the Eccentricity Distribution of Transiting Long-period Brown Dwarfs Open
The orbital eccentricities of brown dwarfs encode valuable information on their formation and evolution history, providing insights into whether they resemble giant planets or stellar binaries. Here, we report the discovery of TOI-5575 b, …
View article: Two Earth-size Planets and an Earth-size Candidate Transiting the nearby Star HD 101581*
Two Earth-size Planets and an Earth-size Candidate Transiting the nearby Star HD 101581* Open
We report the validation of multiple planets transiting the nearby ( d = 12.8 pc) K5V dwarf HD 101581 (GJ 435, TOI–6276, TIC 397362481). This system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion…
View article: Two Earth-size Planets and an Earth-size Candidate Transiting the Nearby Star HD 101581
Two Earth-size Planets and an Earth-size Candidate Transiting the Nearby Star HD 101581 Open
We report the validation of multiple planets transiting the nearby ($d = 12.8$ pc) K5V dwarf HD 101581 (GJ 435, TOI-6276, TIC 397362481). The system consists of at least two Earth-size planets whose orbits are near a mutual 4:3 mean-motion…
View article: Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A
Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A Open
M-dwarf stars provide us with an ideal opportunity to study nearby small planets. The HUnting for M Dwarf Rocky planets Using MAROON-X (HUMDRUM) survey uses the MAROON-X spectrograph, which is ideally suited to studying these stars, to mea…
View article: Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy
Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy Open
Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low i…
View article: Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A
Early Results from the HUMDRUM Survey: A Small, Earth-mass Planet Orbits TOI-1450A Open
M dwarf stars provide us with an ideal opportunity to study nearby small planets. The HUMDRUM (HUnting for M Dwarf Rocky planets Using MAROON-X) survey uses the MAROON-X spectrograph, which is ideally suited to studying these stars, to mea…
View article: Complex Rotational Modulation of Rapidly Rotating M Stars Observed with TESS
Complex Rotational Modulation of Rapidly Rotating M Stars Observed with TESS Open
We have searched for short periodicities in the light curves of stars with T eff cooler than 4000 K made from 2-minute cadence data obtained in Transiting Exoplanet Survey Satellite sectors 1 and 2. Herein we report the discovery of 10 rap…
View article: A giant planet candidate transiting a white dwarf
A giant planet candidate transiting a white dwarf Open
Astronomers have discovered thousands of planets outside the Solar System1, most of which orbit stars that will eventually evolve into red giants and then into white dwarfs. During the red giant phase, any close-orbiting planets will be en…
View article: TESS Hunt for Young and Maturing Exoplanets (THYME). III. A Two-planet System in the 400 Myr Ursa Major Group
TESS Hunt for Young and Maturing Exoplanets (THYME). III. A Two-planet System in the 400 Myr Ursa Major Group Open
Exoplanets can evolve significantly between birth and maturity, as their atmospheres, orbits, and structures are shaped by their environment. Young planets (<1 Gyr) offer an opportunity to probe the critical early stages of this evolution,…
View article: The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc
The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc Open
We present the Transiting Exoplanet Survey Satellite (TESS) discovery of the LHS 1678 (TOI-696) exoplanet system, comprised of two approximately Earth-sized transiting planets and a likely astrometric brown dwarf orbiting a bright (V J = 1…
View article: TOI-1695 b: A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley
TOI-1695 b: A Water World Orbiting an Early-M Dwarf in the Planet Radius Valley Open
Characterizing the bulk compositions of transiting exoplanets within the M dwarf radius valley offers a unique means to establish whether the radius valley emerges from an atmospheric mass-loss process or is imprinted by planet formation i…
View article: A full transit of <i>v</i><sup>2</sup> Lupi d and the search for an exomoon in its Hill sphere with CHEOPS
A full transit of <i>v</i><sup>2</sup> Lupi d and the search for an exomoon in its Hill sphere with CHEOPS Open
The planetary system around the naked-eye star v 2 Lupi (HD 136352; TOI-2011) is composed of three exoplanets with masses of 4.7, 11.2, and 8.6 Earth masses ( M ⊕ ). The TESS and CHEOPS missions revealed that all three planets are transiti…
View article: TOI-1695 b: A Water World Orbiting an Early M Dwarf in the Planet Radius Valley
TOI-1695 b: A Water World Orbiting an Early M Dwarf in the Planet Radius Valley Open
Characterizing the bulk compositions of transiting exoplanets within the M dwarf radius valley offers a unique means to establish whether the radius valley emerges from an atmospheric mass loss process or is imprinted by planet formation i…
View article: GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation
GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation Open
We report the detection of GJ 3090 b (TOI-177.01), a mini-Neptune on a 2.9-day orbit transiting a bright ( K = 7.3 mag) M2 dwarf located at 22 pc. The planet was identified by the Transiting Exoplanet Survey Satellite and was confirmed wit…
View article: TOI-1696: A Nearby M4 Dwarf with a 3 R <sub>⊕</sub> Planet in the Neptunian Desert
TOI-1696: A Nearby M4 Dwarf with a 3 R <sub>⊕</sub> Planet in the Neptunian Desert Open
We present the discovery and validation of a temperate sub-Neptune around the nearby mid-M dwarf TIC 470381900 (TOI-1696), with a radius of 3.09 ± 0.11 R ⊕ and an orbital period of 2.5 days, using a combination of Transiting Exoplanets Sur…
View article: The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc
The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc Open
We present the Transiting Exoplanet Survey Satellite (TESS) discovery of the LHS 1678 (TOI-696) exoplanet system, comprised of two approximately Earth-sized transiting planets and a likely astrometric brown dwarf orbiting a bright ( V J = …
View article: The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d
The First Habitable-zone Earth-sized Planet from TESS. II. Spitzer Confirms TOI-700 d Open
© 2020. The American Astronomical Society. All rights reserved. We present Spitzer 4.5 μm observations of the transit of TOI-700 d, a habitable-zone Earth-sized planet in a multiplanet system transiting a nearby M-dwarf star (TIC 150428135…
View article: TESS Eclipsing Binary Stars. I. Short-cadence Observations of 4584 Eclipsing Binaries in Sectors 1–26
TESS Eclipsing Binary Stars. I. Short-cadence Observations of 4584 Eclipsing Binaries in Sectors 1–26 Open
In this paper we present a catalog of 4584 eclipsing binaries observed during the first two years (26 sectors) of the TESS survey. We discuss selection criteria for eclipsing binary candidates, detection of hitherto unknown eclipsing syste…
View article: The TESS–Keck Survey. VI. Two Eccentric Sub-Neptunes Orbiting HIP-97166
The TESS–Keck Survey. VI. Two Eccentric Sub-Neptunes Orbiting HIP-97166 Open
We report the discovery of HIP-97166b (TOI-1255b), a transiting sub-Neptune on a 10.3 day orbit around a K0 dwarf 68 pc from Earth. This planet was identified in a systematic search of TESS Objects of Interest for planets with eccentric or…
View article: The TESS Objects of Interest Catalog from the TESS Prime Mission
The TESS Objects of Interest Catalog from the TESS Prime Mission Open
We present 2,241 exoplanet candidates identified with data from the\nTransiting Exoplanet Survey Satellite (TESS) during its two-year prime mission.\nWe list these candidates in the TESS Objects of Interest (TOI) Catalog, which\nincludes b…
View article: TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf
TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf Open
We report the discovery of TOI-2285b, a sub-Neptune-sized planet transiting a nearby (42 pc) M dwarf with a period of 27.3 d. We identified the transit signal from the Transiting Exoplanet Survey Satellite photometric data, which we confir…
View article: Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with Earth-like Compositions*
Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with Earth-like Compositions* Open
We present observations of two bright M dwarfs (TOI-1634 and TOI-1685: J = 9.5–9.6) hosting ultra-short-period (USP) planets identified by the TESS mission. The two stars are similar in temperature, mass, and radius ( T eff ≈ 3500 K, M ⋆ ≈…
View article: TOI-220 <i>b</i>: a warm sub-Neptune discovered by<i>TESS</i>
TOI-220 <i>b</i>: a warm sub-Neptune discovered by<i>TESS</i> Open
In this paper, we report the discovery of TOI-220 b, a new sub-Neptune detected by the Transiting Exoplanet Survey Satellite (TESS) and confirmed by radial velocity follow-up observations with the HARPS spectrograph. Based on the combined …
View article: Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with\n Earth-like Compositions
Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with\n Earth-like Compositions Open
We present observations of two bright M dwarfs (TOI-1634 and TOI-1685:\n$J=9.5-9.6$) hosting ultra-short period (USP) planets, identified by the TESS\nmission. The two stars are similar in temperature, mass, and radius\n($T_\\mathrm{eff}\\…
View article: TOI-519 b: a short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis
TOI-519 b: a short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis Open
Context: We report the discovery of TOI-519 b (TIC 218795833), a transiting substellar object (R = 1.07 RJup) orbiting a faint M dwarf (V = 17.35) on a 1.26 d orbit. Brown dwarfs and massive planets orbiting M dwarfs on short-period orbits…
View article: TESS Hunt for Young and Maturing Exoplanets (THYME). III. A Two-planet System in the 400 Myr Ursa Major Group
TESS Hunt for Young and Maturing Exoplanets (THYME). III. A Two-planet System in the 400 Myr Ursa Major Group Open
Exoplanets can evolve significantly between birth and maturity, as their atmospheres, orbits, and structures are shaped by their environment. Young planets (<1 Gyr) offer an opportunity to probe the critical early stages of this evolution,…
View article: PTFO 8-8695: Two Stars, Two Signals, No Planet
PTFO 8-8695: Two Stars, Two Signals, No Planet Open
PTFO 8-8695 (CVSO 30) is a star in the 7–10 million year old Orion OB1a cluster that shows brightness dips that resemble planetary transits. Although strong evidence against the planet hypothesis has been presented, the possibility remains…