Detection and characterisation of oscillating red giants: first results from the TESS satellite
Abstract
Since the onset of the `space revolution' of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archaeology investigations. The launch of the NASA TESS mission has enabled seismic-based inferences to go full sky -- providing a clear advantage for large ensemble studies of the different Milky Way components. Here we demonstrate its potential for investigating the Galaxy by carrying out the first asteroseismic ensemble study of red giant stars observed by TESS. We use a sample of 25 stars for which we measure their global asteroseimic observables and estimate their fundamental stellar properties, such as radius, mass, and age. Significant improvements are seen in the uncertainties of our estimates when combining seismic observables from TESS with astrometric measurements from the Gaia mission compared to when the seismology and astrometry are applied separately. Specifically, when combined we show that stellar radii can be determined to a precision of a few percent, masses to 5-10% and ages to the 20% level. This is comparable to the precision typically obtained using end-of-mission Kepler data
Keywords
Cite
@article{arxiv.1912.07604,
title = {Detection and characterisation of oscillating red giants: first results from the TESS satellite},
author = {Víctor Silva Aguirre and Dennis Stello and Amalie Stokholm and Jakob R. Mosumgaard and Warrick Ball and Sarbani Basu and Diego Bossini and Lisa Bugnet and Derek Buzasi and Tiago L. Campante and Lindsey Carboneau and William J. Chaplin and Enrico Corsaro and Guy R. Davies and Yvonne Elsworth and Rafael A. García and Patrick Gaulme and Oliver J. Hall and Rasmus Handberg and Marc Hon and Thomas Kallinger and Liu Kang and Mikkel N. Lund and Savita Mathur and Alexey Mints and Benoit Mosser and Zeynep Çelik Orhan and Thaíse S. Rodrigues and Mathieu Vrard and Mutlu Yıldız and Joel C. Zinn and Sibel Örtel and Paul G. Beck and Keaton J. Bell and Zhao Guo and Chen Jiang and James S. Kuszlewicz and Charles A. Kuehn and Tanda Li and Mia S. Lundkvist and Marc Pinsonneault and Jamie Tayar and Margarida S. Cunha and Saskia Hekker and Daniel Huber and Andrea Miglio and Mario J. P. F. G. Monteiro and Ditte Slumstrup and Mark L. Winther and George Angelou and Othman Benomar and Attila Bódi and Bruno L. De Moura and Sébastien Deheuvels and Aliz Derekas and Maria Pia Di Mauro and Marc-Antoine Dupret and Antonio Jiménez and Yveline Lebreton and Jaymie Matthews and Nicolas Nardetto and Jose D. do Nascimento, and Filipe Pereira and Luisa F. Rodríguez Díaz and Aldo M. Serenelli and Emanuele Spitoni and Edita Stonkutė and Juan Carlos Suárez and Robert Szabó and Vincent Van Eylen and Rita Ventura and Kuldeep Verma and Achim Weiss and Tao Wu and Thomas Barclay and Jørgen Christensen-Dalsgaard and Jon M. Jenkins and Hans Kjeldsen and George R. Ricker and Sara Seager and Roland Vanderspek},
journal= {arXiv preprint arXiv:1912.07604},
year = {2020}
}
Comments
Accepted for publication in ApJ Letters