210 citations · 1.5k across the 36 of their papers we have counts for
20 papers · 1 filter
WIYN Open Cluster Study. XC. Barium Surface Abundances of Blue Straggler Stars in the Open Clusters NGC 7789 and M67
Andrew C. Nine, Robert D. Mathieu, Simon C. Schuler +1
We investigate barium (Ba) abundances in blue straggler stars (BSSs) in two open clusters, NGC 7789 (1.6 Gyr) and M67 (4 Gyr), as signatures of asymptotic-giant-branch (AGB) mass t…
Theia 456: Tidally Shredding an Open Cluster
Kyle R. Tregoning, Jeff J. Andrews, Marcel A. Agüeros +4
The application of clustering algorithms to the Gaia astrometric catalog has revolutionized our census of stellar populations in the Milky Way, including the discovery of many new,…
A Spectroscopic Analysis of a Sample of K2 Planet-Host Stars: Stellar Parameters, Metallicities and Planetary Radii
V. Loaiza-Tacuri, Katia Cunha, Verne V. Smith +5
The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on spectra of…
Pushing Automated Abundance Derivations Into the Cool Star Regime: A Test Using Three G and Two K Stars in Praesepe
Marwan Gebran, Marcel A. Agüeros, Keith Hawkins +2
We present the results of an abundance analysis of three G and two K dwarfs in the Praesepe open cluster based on high-resolution, moderate signal-to-noise-ratio spectra obtained w…
PEPSI deep spectra. III. A chemical analysis of the ancient planet-host star Kepler-444
C. E. Mack, K. G. Strassmeier, I. Ilyin +3
We obtained an LBT/PEPSI spectrum with very high resolution and high signal-to-noise ratio (S/N) of the K0V host Kepler-444, which is known to host 5 sub-Earth size rocky planets.…
Detailed Abundances of Planet-Hosting Wide Binaries. II. HD80606 + HD80607
Claude E. Mack, Keivan G. Stassun, Simon C. Schuler +2
We present a detailed chemical abundance analysis of 15 elements in the planet-hosting wide binary system HD80606 + HD80607 using Keck/HIRES spectra. As in our previous analysis of…
Detailed Abundances of Stars with Small Planets Discovered by Kepler I: The First Sample
Simon C. Schuler, Zachary A. Vaz, Orlando J. Katime Santrich +7
We present newly derived stellar parameters and the detailed abundances of 19 elements of seven stars with small planets discovered by NASA's Kepler Mission. Each star save one has…
Barium Surface Abundances of Blue Stragglers in the Open Cluster NGC 6819
Katelyn E. Milliman, Robert D. Mathieu, Simon C. Schuler
We present the barium surface abundance of 12 blue stragglers (BSs) and 18 main-sequence (MS) stars in the intermediate-age open cluster NGC 6819 (2.5 Gyr) based on spectra obtaine…
C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets
Johanna K. Teske, Katia Cunha, Verne V. Smith +2
The relative abundances of carbon and oxygen have long been recognized as fundamental diagnostics of stellar chemical evolution. Now, the growing number of exoplanet observations e…
Carbon and Oxygen Abundances in Cool Metal-rich Exoplanet Hosts: A Case Study of the C/O Ratio of 55 Cancri
Johanna K. Teske, Katia Cunha, Simon C. Schuler +2
The super-Earth exoplanet 55 Cnc e, the smallest member of a five-planet system, has recently been observed to transit its host star. The radius estimates from transit observations…
Carbon and Oxygen Abundances in the Hot Jupiter Exoplanet Host Star XO-2N and its Binary Companion
Johanna K. Teske, Simon C. Schuler, Katia Cunha +2
With the aim of connecting the compositions of stars and planets, we present the abundances of carbon and oxygen, as well as iron and nickel, for the transiting exoplanet host star…
TW Hya: Spectral Variability, X-Rays, and Accretion Diagnostics
A. K. Dupree, N. S. Brickhouse, S. R. Cranmer +8
The nearest accreting T Tauri star, TW Hya was observed with spectroscopic and photometric measurements simultaneous with a long se gmented exposure using the CHANDRA satellite. Co…
Detailed Abundances of the Solar Twins 16 Cygni A and B: Constraining Planet Formation Models
S. C. Schuler, K. Cunha, V. V. Smith +4
Results of a detailed abundance analysis of the solar twins 16 Cyg A and 16 Cyg B based on high-resolution, high signal-to-noise ratio echelle spectroscopy are presented. 16 Cyg B…
Abundances of Stars with Planets: Trends with Condensation Temperature
Simon C. Schuler, Davin Flateau, Katia Cunha +3
Precise abundances of 18 elements have been derived for ten stars known to host giant planets from high signal-to-noise ratio, high-resolution echelle spectroscopy. Internal uncert…
Metallicities of Planet Hosting Stars: A Sample of Giants and Subgiants
L. Ghezzi, K. Cunha, S. C. Schuler +1
This work presents a homogeneous derivation of atmospheric parameters and iron abundances for a sample of giant and subgiant stars which host giant planets, as well as a control sa…
Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
L. Ghezzi, K. Cunha, V. V. Smith +3
The metal content of planet hosting stars is an important ingredient which may affect the formation and evolution of planetary systems. Accurate stellar abundances require the dete…
Fe I and Fe II Abundances of Solar-Type Dwarfs in the Pleiades Open Cluster
S. C. Schuler, A. L. Plunkett, J. R. King +1
We have derived Fe abundances of 16 solar-type Pleiades dwarfs by means of an equivalent width analysis of Fe I and Fe II lines in high-resolution spectra obtained with the Hobby -…
Li I and K I Scatter in Cool Pleiades Dwarfs
J. R. King, S. C. Schuler, L. M. Hobbs +1
We utilize high-resolution (R~60,000), high S/N (~100) spectroscopy of 17 cool Pleiades dwarfs to examine the confounding star-to-star scatter in the 6707 Li I line strengths in th…
Stellar Parameters for a Sample of Stars with Planets
L. Ghezzi, K. Cunha, F. X. de Araújo +3
The study of chemical abundances in stars with planets is an important ingredient for the models of formation and evolution of planetary systems. In order to determine accurate abu…
Stellar Nucleosynthesis in the Hyades Open Cluster
S. C. Schuler, J. R. King, L. -S. The
We report a comprehensive light element (Li, C, N, O, Na, Mg, and Al) abundance analysis of three solar-type main sequence (MS) dwarfs and three red giant branch (RGB) clump stars…