Discovering the First Exoplanets Around White Dwarf Stars with the Zwicky Transient Facility

利用兹威基瞬态设施发现白矮星周围的第一批系外行星

• 批准号: 1903828
• 负责人: Keaton Bell
• 金额: $ 10万
• 依托单位: Bell, Keaton John
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1903828&HistoricalAwards=false
• 关键词: Discovering; First; Exoplanets; Around; White

Keaton Bell is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to conduct a program of research and education at the University of Washington. He will use data from the Zwicky Transient Facility (ZTF) to attempt to make the first discoveries of extrasolar planets (exoplanets) orbiting white dwarf (WD) stars --- collapsed stars, which are no longer producing energy from nuclear fusion like normal stars, but are glowing faintly from residual heat. Bell will determine what fraction of WDs host exoplanets, and study the populations of WD exoplanets, which will lead him to a better understanding of how planetary systems survive the collapse of their star. In conjunction with his research, he will mentor college freshman students from groups underrepresented in science, technology, engineering, and mathematics (STEM) fields, and he will help train astronomy graduate students in methods of data science. The proposed scientific program seeks to characterize the properties of individual WD planetary systems and investigate the physical mechanisms that affect planets during post-main-sequence evolution. Bell proposes to identify candidate planet transits by searching the ZTF data set for statistically significant dips in measured flux. Strong candidates will be confirmed and characterized with follow-up photometric and spectroscopic observations. The educational component of his work will help promote a more capable and diverse STEM workforce by providing students with valuable skills in preparation for possible careers in science or engineering.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

Keaton Bell被授予NSF天文学和天体物理学博士后奖学金，在华盛顿大学进行研究和教育计划。 他将利用Zwicky Transient Facility（ZTF）的数据，试图首次发现围绕白色矮星（WD）运行的太阳系外行星（系外行星）-塌缩恒星，这些恒星不再像正常恒星那样通过核聚变产生能量，而是从余热中发出微弱的光芒。贝尔将确定WD中有多少是系外行星，并研究WD系外行星的数量，这将使他更好地了解行星系统如何在星星崩溃后幸存下来。结合他的研究，他将指导来自科学，技术，工程和数学（STEM）领域代表性不足的群体的大学新生，他将帮助培养天文学研究生的数据科学方法。拟议的科学计划旨在描述单个WD行星系统的特性，并研究在主序后演化期间影响行星的物理机制。贝尔建议通过搜索ZTF数据集来确定候选行星凌日，以便在测量的通量中找到统计上显著的下降。强有力的候选者将被确认，并通过后续的光度和光谱观测进行表征。他的工作的教育部分将有助于促进更有能力和多样化的干劳动力，为学生提供有价值的技能，为可能的职业生涯在科学或工程。这个奖项反映了NSF的法定使命，并已被认为是值得通过评估使用基金会的智力价值和更广泛的影响审查标准的支持。

项目成果

Asteroseismology of PG 1541 + 651 and BPM 31594 with TESS

使用 TESS 对 PG 1541 和 BPM 31594 进行星震学研究

• DOI: 10.1093/mnras/stac3113
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Romero, Alejandra D.;da Rosa, Gabriela Oliveira;Kepler, S. O.;Bradley, Paul A.;Uzundag, Murat;Bell, Keaton J.;Hermes, J. J.;Lauffer, G. R.
• 通讯作者: Lauffer, G. R.

Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS: II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541

用 TESS 观测到的脉动缺氢白矮星和前白矮星：II。

• DOI: 10.1051/0004-6361/202141253
• 发表时间: 2021
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Uzundag, M.;Córsico, A. H.;Kepler, S. O.;Althaus, L. G.;Werner, K.;Reindl, N.;Bell, K. J.;Higgins, M.;da Rosa, G. O.;Vučković, M.
• 通讯作者: Vučković, M.

I Spy Transits and Pulsations: Empirical Variability in White Dwarfs Using Gaia and the Zwicky Transient Facility

• DOI: 10.3847/1538-4357/abee68
• 发表时间: 2021-05-01
• 期刊: ASTROPHYSICAL JOURNAL
• 影响因子: 4.9
• 作者: Guidry, Joseph A.;Vanderbosch, Zachary P.;Kuehne, J. W.
• 通讯作者: Kuehne, J. W.

Discovery, TESS Characterization, and Modeling of Pulsations in the Extremely Low-mass White Dwarf GD 278

• DOI: 10.3847/1538-4357/ac2d28
• 发表时间: 2021-10
• 期刊: The Astrophysical Journal
• 作者: Isaac D. Lopez;J. Hermes;L. M. Calcaferro;K. Bell;Adam Samuels;Z. Vanderbosch;A. Córsico;A. Istrate

Detection and Characterization of Oscillating Red Giants: First Results from the TESS Satellite

• DOI: 10.3847/2041-8213/ab6443
• 发表时间: 2019-12
• 期刊: The Astrophysical Journal Letters
• 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