• Corpus ID: 119464003

Constraining Stellar Photospheres as an Essential Step for Transmission Spectroscopy of Small Exoplanets

  title={Constraining Stellar Photospheres as an Essential Step for Transmission Spectroscopy of Small Exoplanets},
  author={Benjamin V. Rackham and Arazi Pinhas and D{\'a}niel Apai and Rapha{\"e}lle D. Haywood and Heather M. Cegla and N{\'e}stor Espinoza and Johanna K. Teske and Michael A. Gully-Santiago and Gioia Rau and Brett M. Morris and Daniel Angerhausen and Thomas Barclay and Ludmila Carone and P. Wilson Cauley and Julien de Wit and Shawn D. Domagal‐Goldman and Chuanfei Dong and Diana Dragomir and Mark S. Giampapa and Yasuhiro Hasegawa and Natalie R. Hinkel and Renyu Hu and Andr'es Jord'an and Irina N. Kitiashvili and Laura Kreidberg and Carey M. Lisse and Joe Llama and Mercedes L'opez-Morales and Bertrand Mennesson and Karan Molaverdikhani and David James Osip and Elisa V. Quintana},
  journal={arXiv: Solar and Stellar Astrophysics},
Transmission spectra probe the atmospheres of transiting exoplanets, but these observations are also subject to signals introduced by magnetic active regions on host stars. Here we outline scientific opportunities in the next decade for providing useful constraints on stellar photospheres and inform interpretations of transmission spectra of the smallest ($R<4\,R_{\odot}$) exoplanets. We identify and discuss four primary opportunities: (1) refining stellar magnetic active region properties… 

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