Detection and characterisation of oscillating red giants: first results from the TESS satellite

Víctor Silva Aguirre, Dennis Stello, Amalie Stokholm, Jakob R. Mosumgaard, Warrick Ball, Sarbani Basu, Diego Bossini, Lisa Bugnet, Derek Buzasi, Tiago L. Campante, Lindsey Carboneau, William J. Chaplin, Enrico Corsaro, Guy R. Davies, Yvonne Elsworth, Rafael A. García, Patrick Gaulme, Oliver J. Hall, Rasmus Handberg, Marc Hon, Thomas Kallinger, Liu Kang, Mikkel N. Lund, Savita Mathur, Alexey Mints, Benoit Mosser, Zeynep Çelik Orhan, Thaíse S. Rodrigues, Mathieu Vrard, Mutlu Yıldız, Joel C. Zinn, Sibel Örtel, Paul G. Beck, Keaton J. Bell, Zhao Guo, Chen Jiang, James S. Kuszlewicz, Charles A. Kuehn, Tanda Li, Mia S. Lundkvist, Marc Pinsonneault, Jamie Tayar, Margarida S. Cunha, Saskia Hekker, Daniel Huber, Andrea Miglio, Mario J. P. F. G. Monteiro, Ditte Slumstrup, Mark L. Winther, George Angelou, Othman Benomar, Attila Bódi, Bruno L. De Moura, Sébastien Deheuvels, Aliz Derekas, Maria Pia Di Mauro, Marc-Antoine Dupret, Antonio Jiménez, Yveline Lebreton, Jaymie Matthews, Nicolas Nardetto, Jose D. do Nascimento Jr., Filipe Pereira, Luisa F. Rodríguez Díaz, Aldo M. Serenelli, Emanuele Spitoni, Edita Stonkutė, Juan Carlos Suárez, Robert Szabó, Vincent Van Eylen, Rita Ventura, Kuldeep Verma, Achim Weiss, Tao Wu, Thomas Barclay, Jørgen Christensen-Dalsgaard, Jon M. Jenkins, Hans Kjeldsen, George R. Ricker, Sara Seager, Roland Vanderspek

Detection and characterisation of oscillating red giants: first results from the TESS satellite
See arXiv version
Accepted for publication in ApJ Letters


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

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