193 citations · 607 across the 12 of their papers we have counts for
12 papers
Red giant asteroseismic binaries in the Kepler field
Francisca Espinoza-Rojas, Nathalie Themeßl, Saskia Hekker
Systems in which two oscillating stars are observed in the same light curve, so-called asteroseismic binaries (ABs), arise from either chance alignments or gravitationally bound st…
New red giants in NGC 6791 and NGC 6819 using Kepler superstamps
A. Covelo-Paz, N. Themeßl, F. Espinoza-Rojas +1
Context. Stars that are members of stellar clusters are assumed to be formed at the same time and place from material with the same initial chemical composition. These additional c…
Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
Jie Yu, Shourya Khanna, Nathalie Themessl +4
Asteroseismology has become widely accepted as a benchmark for accurate and precise fundamental stellar properties. It can therefore be used to validate and calibrate stellar param…
Age dating of an early Milky Way merger via asteroseismology of the naked-eye star Indi
William J. Chaplin, Aldo M. Serenelli, Andrea Miglio +81
Over the course of its history, the Milky Way has ingested multiple smaller satellite galaxies. While these accreted stellar populations can be forensically identified as kinematic…
TOI-257b (HD 19916b): A Warm sub-Saturn Orbiting an Evolved F-type Star
Brett C. Addison, Duncan J. Wright, Belinda A. Nicholson +91
We report the discovery of a warm sub-Saturn, TOI-257b (HD 19916b), based on data from NASA's Transiting Exoplanet Survey Satellite (TESS). The transit signal was detected by TESS…
KIC 2568888: To be or not to be a binary
N. Themeßl, S. Hekker, A. Mints +4
In cases where both components of a binary system show oscillations, asteroseismology has been proposed as a method to identify the system. For KIC 2568888, observed with ,…
Surface effects on the red giant branch
W. H. Ball, N. Themeßl, S. Hekker
Individual mode frequencies have been detected in thousands of individual solar-like oscillators on the red giant branch (RGB). Fitting stellar models to these mode frequencies, ho…
Oscillating red giants in eclipsing binary systems: empirical reference value for asteroseismic scaling relation
N. Themeßl, S. Hekker, J. Southworth +10
The internal structures and properties of oscillating red-giant stars can be accurately inferred through their global oscillation modes (asteroseismology). Based on 1460 days of Ke…
Automated asteroseismic peak detections
Andrés García Saravia Ortiz de Montellano, Saskia Hekker, Nathalie Themeßl
Space observatories such as have provided data that can potentially revolutionise our understanding of stars. Through detailed asteroseismic analyses we are capab…
Presence of mixed modes in red giants in binary systems
Nathalie Themeßl, Saskia Hekker, Yvonne Elsworth
The frequencies of oscillation modes in stars contain valuable information about the stellar properties. In red giants the frequency spectrum also contains mixed modes, with both p…
Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
F. Anders, C. Chiappini, T. S. Rodrigues +42
With the advent of the space missions CoRoT and Kepler, it has become feasible to determine precise asteroseismic masses and ages for large samples of red-giant stars. In this pape…
Young [/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
C. Chiappini, F. Anders, T. S. Rodrigues +34
We report the discovery of a group of apparently young CoRoT red-giant stars exhibiting enhanced [alpha/Fe] abundance ratios (as determined from APOGEE spectra) with respect to Sol…