Detection of TiO and VO in the Atmosphere of WASP-121b and Evidence For its Temporal Variation

• Published in: Research in astronomy and astrophysics Vol. 23; no. 6; pp. 65010 - 115
• Main Authors: Ouyang, Qinglin, Wang, Wei, Zhai, Meng, Chen, Guo, Rojo, Patricio, Liu, Yujuan, Zhao, Fei, Huang, Jia-Sheng, Zhao, Gang
• Format: Journal Article
• Language: English
• Published: Beijing National Astromonical Observatories, CAS and IOP Publishing 01.06.2023; IOP Publishing; School of Astronomy and Space Science,University of Chinese Academy of Sciences(UCAS),Beijing 100049,China%CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China%Chinese Academy of Sciences South America Center for Astronomy(CASSACA),National Astronomical Observatories,Beijing 100101,China%CAS Key Laboratory of Planetary Sciences,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China%Departamento de Astronomía,Universidad de Chile,Camino El Observatorio 1515,Las Condes,Santiago,Chile%School of Astronomy and Space Science,University of Chinese Academy of Sciences(UCAS),Beijing 100049,China; Chinese Academy of Sciences South America Center for Astronomy(CASSACA),National Astronomical Observatories,Beijing 100101,China; CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China
• Subjects: Abundance; Astrophysical research; Chemical composition; Extrasolar planets; Gas giant planets; Gaussian process; Jupiter; Light curve; methods: data analysis; Planetary Systems; planets and satellites: atmospheres; Rayleigh scattering; Reference stars; Retrieval; Spectra; Spectrophotometry; Spectroscopy; stars: individual (WASP-121); techniques: spectroscopic; Transit; techniques:spectroscopic; planets and satellites:atmospheres; Planetary Systems; methods:data analysis; stars:individual(WASP-121)

We report the transit observations of the ultra-hot Jupiter WASP-121b using the Goodman High Throughput Spectrograph at the 4 m ground-based Southern Astrophysical Research Telescope, covering the wavelength range 502–900 nm. By dividing the target and reference star into 19 spectroscopic passbands...