16 citations · 29 across the 8 of their papers we have counts for
7 papers · 1 filter
Predicting Macroturbulence in F/G/K Dwarfs to 100 m/s Precision
Jack Lubin, Erik Petigura, Kento Masuda +6
We leverage the high resolution and spectral stability of the Keck Planet Finder (KPF) spectrograph to investigate macroturbulence broadening via the stellar cross-correlation func…
Synthetic disk-integrated absorption lines isolating stellar granulation for high-precision RV studies
Ginger Frame, Heather Cegla, Cis Lagae +6
We present a novel method for constructing high-accuracy, time-varying disk-integrated stellar absorption line profiles that isolate the effects of granulation alone. This framewor…
The Limits of Line Broadening: Modeling Stellar Spectra and Formation Temperatures at High Resolution
Michael L. Palumbo
The modeling of stellar spectra is pervasive in astronomy. Conventionally, the shapes of absorption lines are modeled by convolving thermal profiles (computed given some model stel…
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…
GRASS II: Simulations of Potential Granulation Noise Mitigation Methods
Michael L. Palumbo, Eric B. Ford, Elizabeth B. Gonzalez +3
We present an updated version of GRASS (the GRanulation And Spectrum Simulator, Palumbo et al. 2022) which now uses an expanded library of 22 solar lines to empirically model time-…
Characterizing Solar Center-to-Limb Radial-Velocity Variability with SDO
Michael L. Palumbo, Steven H. Saar, Raphaëlle D. Haywood
Stellar photospheric inhomogeneities are a significant source of noise which currently precludes the discovery of Earth-mass planets orbiting Sun-like stars with the radial-velocit…
: Distinguishing Planet-induced Doppler Signatures from Granulation with a Synthetic Spectra Generator
Michael L. Palumbo, Eric B. Ford, Jason T. Wright +3
Owing to recent advances in radial-velocity instrumentation and observation techniques, the detection of Earth-mass planets around Sun-like stars may soon be primarily limited by i…