activity
20152026
most citedFive Decades of Chromospheric Activity in 59 Sun-like Stars and New Maunder Minimum Candidate HD 166620

54 citations · 368 across the 32 of their papers we have counts for

collaborators
Showing 2024Show all

7 papers · 1 filter

astro-ph.EP2024

Origins of Super Jupiters: TOI-2145b Has a Moderately Eccentric and Nearly Aligned Orbit

Jiayin Dong, Ashley Chontos, George Zhou +15

Super Jupiters are giant planets with several Jupiter masses. It remains an open question whether these planets originate with such high masses or grow through collisions. Previous…

astro-ph.EP2024

The NEID Earth Twin Survey. I. Confirmation of a 31-day planet orbiting HD 86728

Arvind F. Gupta, Jacob K. Luhn, Jason T. Wright +21

With close to three years of observations in hand, the NEID Earth Twin Survey (NETS) is starting to unearth new astrophysical signals for a curated sample of bright, radial velocit…

astro-ph.EP2024

The HD 191939 Exoplanet System is Well-Aligned and Flat

Jack Lubin, Erik A. Petigura, Judah Van Zandt +25

We report the sky-projected spin-orbit angle for HD 191939 b, the innermost planet in a 6 planet system, using Keck/KPF to detect the Rossiter-McLaughlin (RM) effect. Planet b…

astro-ph.EP2024★ 1 cited

Data-Driven Modeling of Telluric Features and Stellar Variability with StellarSpectraObservationFitting.jl

Christian Gilbertson, Eric B. Ford, Samuel Halverson +11

A significant barrier to achieving the radial velocity (RV) measurement accuracy and precision required to characterize terrestrial mass exoplanets is the existence of time-variabl…

astro-ph.SR2024

Earths within Reach: Evaluation of Strategies for Mitigating Solar Variability using 3.5 years of NEID Sun-as-a-Star Observations

Eric B. Ford, Chad F. Bender, Cullen H. Blake +15

We present the results of Sun-as-a-star observations by the NEID Solar Telescope at WIYN Observatory, spanning January 1, 2021 through June 30, 2024. We identify 117,060 observatio…

astro-ph.SR2024★ 7 cited

Quiet Please: Detrending Radial Velocity Variations from Stellar Activity with a Physically Motivated Spot Model

Jared C. Siegel, Samuel Halverson, Jacob K. Luhn +15

For solar-type stars, spots and their associated magnetic regions induce radial velocity perturbations through the Doppler rotation signal and the suppression of convective blueshi…

astro-ph.EP2024★ 13 cited

The death of Vulcan: NEID reveals the planet candidate orbiting HD 26965 is stellar activity

Abigail Burrows, Samuel Halverson, Jared C. Siegel +17

We revisit the long-studied radial velocity (RV) target HD26965 using recent observations from the NASA-NSF 'NEID' precision Doppler facility. Leveraging a suite of classical activ…