Detection and Characterization of Oscillating Red Giants: First Results from the TESS Satellite
Detection and Characterization of Oscillating Red Giants: First Results from the TESS Satellite
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DOI：
10.3847/2041-8213/ab6443
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发表时间：
2019-12
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通讯作者：
V. S. Aguirre;D. Stello;A. Stokholm;J. Mosumgaard;W. Ball;S. Basu;D. Bossini;L. Bugnet;D. Buzasi;T. Campante;L. Carboneau;W. Chaplin;E. Corsaro;G. Davies;Y. Elsworth;Rafael A. Garc'ia;P. Gaulme;O. Hall;R. Handberg;M. Hon;T. Kallinger;Liu Kang;M. Lund;S. Mathur;A. Mints;B. Mosser;Z. Çelik Orhan;T. Rodrigues;M. Vrard;M. Yıldız;J. Zinn;S. Örtel;P. Beck;K. Bell;Zhao Guo;Chen Jiang;J. Kuszlewicz;C. Kuehn;Tanda Li;M. Lundkvist;M. Pinsonneault;J. Tayar;M. Cunha;S. Hekker;D. Huber;A. Miglio;Mario J. P. F. G. Monteiro;D. Slumstrup;M. Winther;G. Angelou;O. Benomar;A. B'odi;B. L. de Moura;S. Deheuvels;A. Derekas;M. D. Di Mauro;M. Dupret;A. Jim'enez;Y. Lebreton;J. Matthews;N. Nardetto;J. do Nascimento;F. Pereira;Luisa F. Rodríguez Díaz;A. Serenelli;E. Spitoni;E. Stonkutė;J. Su'arez;R. Szab'o;V. Van Eylen;R. Ventura;K. Verma;A. Weiss;Tao Wu;T. Barclay;J. Christensen-Dalsgaard;J. Jenkins;H. Kjeldsen;G. Ricker;S. Seager;R. Vanderspek
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作者：
V. S. Aguirre;D. Stello;A. Stokholm;J. Mosumgaard;W. Ball;S. Basu;D. Bossini;L. Bugnet;D. Buzasi;T. Campante;L. Carboneau;W. Chaplin;E. Corsaro;G. Davies;Y. Elsworth;Rafael A. Garc'ia;P. Gaulme;O. Hall;R. Handberg;M. Hon;T. Kallinger;Liu Kang;M. Lund;S. Mathur;A. Mints;B. Mosser;Z. Çelik Orhan;T. Rodrigues;M. Vrard;M. Yıldız;J. Zinn;S. Örtel;P. Beck;K. Bell;Zhao Guo;Chen Jiang;J. Kuszlewicz;C. Kuehn;Tanda Li;M. Lundkvist;M. Pinsonneault;J. Tayar;M. Cunha;S. Hekker;D. Huber;A. Miglio;Mario J. P. F. G. Monteiro;D. Slumstrup;M. Winther;G. Angelou;O. Benomar;A. B'odi;B. L. de Moura;S. Deheuvels;A. Derekas;M. D. Di Mauro;M. Dupret;A. Jim'enez;Y. Lebreton;J. Matthews;N. Nardetto;J. do Nascimento;F. Pereira;Luisa F. Rodríguez Díaz;A. Serenelli;E. Spitoni;E. Stonkutė;J. Su'arez;R. Szab'o;V. Van Eylen;R. Ventura;K. Verma;A. Weiss;Tao Wu;T. Barclay;J. Christensen-Dalsgaard;J. Jenkins;H. Kjeldsen;G. Ricker;S. Seager;R. Vanderspek
自从高精度高节奏测光的“太空革命”开始以来，星震学已被证明是银河系考古调查的有力工具。NASA凌日系外行星调查卫星(TESS)任务的发射使基于地震的推断得以全面展开--这为对银河系不同组成部分的大型整体研究提供了明显的优势。在这里，我们通过对TESS观测到的红巨星进行第一次星震集合研究，展示了它在研究银河系方面的潜力。我们使用了25颗恒星的样本，我们测量了它们的全球类星可观测性，并估计了它们的基本恒星属性，如半径、质量和年龄。与单独应用地震学和天体测量学相比，将TESS的地震观测数据与GAIA任务的天文测量结果结合起来时，我们估计的不确定度有了显著的改善。具体地说，当结合在一起时，我们发现恒星半径可以被确定到几个百分点的精度，质量可以被确定到5%-10%，年龄可以被确定到20%的水平。这与通常使用任务结束开普勒数据获得的精度相当。
Since the onset of the “space revolution” of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archeology investigations. The launch of the NASA Transiting Exoplanet Survey Satellite (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.