164 citations · 302 across the 16 of their papers we have counts for
16 papers
Wrinkles in Time. II. Stellar Age Trends in Kinematic Signatures from Transient Spiral Structure
Amy Smock, Kathryne J. Daniel, Rayna Rampalli +4
Spiral arms in the disks of galaxies like the Milky Way can generate kinematic signatures, which appear as ridges or wrinkles in action space. Such signatures have proven difficult…
The Absolute Age of the Open Cluster NGC 6791 and Its Implications for Galactic Archaeology and Asteroseismic Calibration
George Dufresne, Brian Chaboyer, Rayna Rampalli
We present a new absolute age determination for NGC 6791, one of the Milky Way's oldest and most metal-rich open clusters. Its unusual properties make it an important probe of inne…
A Galactic Perspective on the (Unremarkable) Relative Refractory Depletion Observed in the Sun
Rayna Rampalli, James W. Johnson, Melissa K. Ness +5
Over the last two decades, the Sun has been observed to be depleted in refractory elements as a function of elemental condensation temperature (\tcond) relative to of it…
Disentangling Metallicity Effects in Hot Jupiter Occurrence Across Galactic Birth Radius and Phase-Space Density
Rayna Rampalli, Melissa K. Ness, Elisabeth R. Newton +3
We explore how the correlation between host star metallicity and giant planets shapes hot Jupiter occurrence as a function of Galactic birth radius (\rbirth) and phase-space densit…
The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts
Rayna Rampalli, Melissa K. Ness, Graham H. Edwards +2
The elemental abundances of stars, particularly the refractory elements (e.g., Fe, Si, Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not…
Wrinkles in Time -- I: Rapid Rotators Found in High Eccentricity Orbits
Rayna Rampalli, Amy Smock, Elisabeth R. Newton +2
Recent space-based missions have ushered in a new era of observational astronomy, where high-cadence photometric light curves for thousands to millions of stars in the solar neighb…
TOI-4562 b: A highly eccentric temperate Jupiter analog orbiting a young field star
Alexis Heitzmann, George Zhou, Samuel N. Quinn +47
We report the discovery of TOI-4562 b (TIC-349576261), a Jovian planet orbiting a young F7V-type star, younger than the Praesepe/Hyades clusters (< Myr). This planet stands o…
TESS Hunt for Young and Maturing Exoplanets (THYME) VII : Membership, rotation, and lithium in the young cluster Group-X and a new young exoplanet
Elisabeth R. Newton, Rayna Rampalli, Adam L. Kraus +36
The public, all-sky surveys Gaia and TESS provide the ability to identify new young associations and determine their ages. These associations enable study of planetary evolution by…
The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-ray Activity Relation in Praesepe and the Hyades
Alejandro Núñez, Marcel A. Agüeros, Kevin R. Covey +7
X-ray observations of low-mass stars in open clusters are critical to understanding the dependence of magnetic activity on stellar properties and their evolution. Praesepe and the…
Activity and Rotation of Nearby Field M Dwarfs in the TESS Southern Continuous Viewing Zone
Francys Anthony, Alejandro Núñez, Marcel A. Agüeros +8
The evolution of magnetism in late-type dwarfs remains murky, as we can only weakly predict levels of activity for M dwarfs of a given mass and age. We report results from our spec…
NEID Rossiter-McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star
Jiayin Dong, Chelsea X. Huang, George Zhou +56
Close-in gas giants present a surprising range of stellar obliquity, the angle between a planet's orbital axis and its host star's spin axis. It is unclear whether the obliquities…
The Astrophysical Variance in Gaia-RVS Spectra
Rayna Rampalli, Melissa Ness, Shola Wylie
Large surveys are providing a diversity of spectroscopic observations with Gaia alone set to deliver millions of Ca-triplet-region spectra across the Galaxy. We aim to understand t…
Three K2 Campaigns Yield Rotation Periods for 1013 Stars in Praesepe
Rayna Rampalli, Marcel A. Agüeros, Jason L. Curtis +8
We use three campaigns of K2 observations to complete the census of rotation in low-mass members of the benchmark, 670-Myr-old open cluster Praesepe. We measure new rotati…
The H Dots Survey. IV. A Fourth List of Faint Emission-Line Objects
Joseph D. Watkins, John J. Salzer, Angela Van Sistine +3
We present the fourth catalog of serendipitously discovered compact extragalactic emission-line sources -- H Dots. A total of 454 newly discovered objects are included in the cu…
TESS Hunt for Young and Maturing Exoplanets (THYME): A planet in the 45 Myr Tucana-Horologium association
Elisabeth R. Newton, Andrew W. Mann, Benjamin M. Tofflemire +49
Young exoplanets are snapshots of the planetary evolution process. Planets that orbit stars in young associations are particularly important because the age of the planetary system…
A Hot Saturn Near (but unassociated with) the Open Cluster NGC 1817
Rayna Rampalli, Andrew Vanderburg, Allyson Bieryla +14
We report on the discovery of a hot Saturn-sized planet (9.916 +/- 0.985 R_earth) around a late F star, EPIC 246865365, observed in Campaign 13 of the K2 mission. We began studying…