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The TESS-Keck Survey XVII: Precise Mass Measurements in a Young, High Multiplicity Transiting Planet System using Radial Velocities and Transit Timing Variations
Corey Beard, Paul Robertson, Fei Dai +41
We present a radial velocity (RV) analysis of TOI-1136, a bright TESS system with six confirmed transiting planets, and a seventh single-transiting planet candidate. All planets in…
TOI-1670 c, a 40-day Orbital Period Warm Jupiter in a Compact System, is Well-aligned
Jack Lubin, Xian-Yu Wang, Malena Rice +21
We report the measurement of the sky-projected obliquity angle of the Warm Jovian exoplanet TOI-1670 c via the Rossiter-McLaughlin effect as part of the Stellar Obliquities in…
TOI-5344 b: A Saturn-like planet orbiting a super-Solar metallicity M0 dwarf
Te Han, Paul Robertson, Shubham Kanodia +19
We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0 dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite phot…
Revisiting Eridani with NEID: Identifying New Activity-Sensitive Lines in a Young K Dwarf Star
Sarah Jiang, Arpita Roy, Samuel Halverson +7
Recent improvements in the sensitivity and precision of the radial velocity (RV) method for exoplanets have brought it close, but not quite to, the threshold (10 cm/s) requir…
TOI-2015b: A Warm Neptune with Transit Timing Variations Orbiting an Active mid M Dwarf
Sinclaire E. Jones, Gudmundur Stefansson, Kento Masuda +29
We report the discovery of a close-in () warm Neptune with clear transit timing variations (TTVs) orbiting the nearby ($d=47.3\:\mathrm{pc}…
Astrometry and Precise Radial Velocities Yield a Complete Orbital Solution for the Nearby Eccentric Brown Dwarf LHS 1610 b
Evan Fitzmaurice, Gudmundur Stefánsson, Robert D. Kavanagh +18
The LHS 1610 system consists of a nearby ( pc) M5 dwarf hosting a candidate brown dwarf companion in a day, eccentric () orbit. We confirm this brown dwa…
The Extreme Stellar-Signals Project III. Combining Solar Data from HARPS, HARPS-N, EXPRES, and NEID
Lily L. Zhao, Xavier Dumusque, Eric B. Ford +37
We present an analysis of Sun-as-a-star observations from four different high-resolution, stabilized spectrographs -- HARPS, HARPS-N, EXPRES, and NEID. With simultaneous observatio…
Stable fiber-illumination for extremely precise radial velocities with NEID
Shubham Kanodia, Andrea S. J. Lin, Emily Lubar +24
NEID is a high-resolution red-optical precision radial velocity (RV) spectrograph recently commissioned at the WIYN 3.5 m telescope at Kitt Peak National Observatory, Arizona, USA.…
TOI-4201: An Early M-dwarf Hosting a Massive Transiting Jupiter Stretching Theories of Core-Accretion
Megan Delamer, Shubham Kanodia, Caleb I. Cañas +24
We confirm TOI-4201 b as a transiting Jovian mass planet orbiting an early M dwarf discovered by the Transiting Exoplanet Survey Satellite. Using ground based photometry and precis…
The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems
Joseph M. Akana Murphy, Natalie M. Batalha, Nicholas Scarsdale +44
With JWST's successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for char…
The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope -- III. Single Object Slitless Spectroscopy
Loic Albert, David Lafreniere, Rene Doyon +37
The Near Infrared Imager and Slitless Spectrograph instrument (NIRISS) is the Canadian Space Agency (CSA) contribution to the suite of four science instruments of JWST. As one of t…
The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope -- I. Instrument Overview and in-Flight Performance
Rene Doyon, C. J Willott, John B. Hutchings +60
The Near-Infrared Imager and Slitless Spectrograph (NIRISS) is the science module of the Canadian-built Fine Guidance Sensor (FGS) onboard the James Webb Space Telescope (JWST). NI…
The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars
Mason G. MacDougall, Erik A. Petigura, Gregory J. Gilbert +38
We present the stellar and planetary properties for 85 TESS Objects of Interest (TOIs) hosting 108 planet candidates which comprise the TESS-Keck Survey (TKS) sample. We combine ph…
TOI-1859b: A 64-Day Warm Jupiter on an Eccentric and Misaligned Orbit
Jiayin Dong, Songhu Wang, Malena Rice +31
Warm Jupiters are close-in giant planets with relatively large planet-star separations (i.e., ). Given their weak tidal interactions with their host stars, meas…
A High-Eccentricity Warm Jupiter Orbiting TOI-4127
Arvind F. Gupta, Jonathan M. Jackson, Guillaume Hebrard +36
We report the discovery of TOI-4127 b, a transiting, Jupiter-sized exoplanet on a long-period ( d), high-eccentricity orbit around a late F-type…
An extreme test case for planet formation: a close-in Neptune orbiting an ultracool star
Gudmundur Stefansson, Suvrath Mahadevan, Yamila Miguel +27
In current theories of planet formation, close-orbiting planets as massive as Neptune are expected to be very rare around low-mass stars. We report the discovery of a Neptune-mass…
TOI-3984 A b and TOI-5293 A b: two temperate gas giants transiting mid-M dwarfs in wide binary systems
Caleb I. Cañas, Shubham Kanodia, Jessica Libby-Roberts +30
We confirm the planetary nature of two gas giants discovered by TESS to transit M dwarfs with stellar companions at wide separations. TOI-3984 A () is an M4 dwarf hosting…
The unusual M-dwarf Warm Jupiter TOI-1899~b: Refinement of orbital and planetary parameters
Andrea S. J. Lin, Jessica E. Libby-Roberts, Jaime A. Alvarado-Montes +31
TOI-1899 b is a rare exoplanet, a temperate Warm Jupiter orbiting an M-dwarf, first discovered by Cañas et al. (2020) from a TESS single-transit event. Using new radial velocities…