Table 1
Summary of chemical species detected via high-resolution spectroscopy in UHJ atmospheres, retrieved from the Exoplanet Atmospheres Database as of May 2024.
| Planet | Teq (planet) | Teff(star) | Neutral atoms | Ions | Molecules | References |
|---|---|---|---|---|---|---|
| HAT-P-70b | 2562 K | 8450 K | Ca, Cr, Fe, H, Mg, Mn, Na, V | Ca+, Cr+, Fe+, Ti+ | 1, 2 | |
| KELT-9b | 3921 K | 9329 K | Ca, Co, Cr, Fe, H, Mg, Na, Ni, O, Si, Ti, V | Ba+, Ca+, Cr+, Fe+, Na+, Sc+, Sr+, Tb+, Ti+, Y+ | 3–18 | |
| MASCARA-1b | 2594 K | 7554 K | Cr, Fe, Ti | CO, H2O | 19–22 | |
| MASCARA-2b | 2261 K | 8652 K | Ca, Cr, Fe, H, Mg, Mn, Na, Ni, Si | Ca+, Cr+, Fe+ | 2, 11, 12, 23–34 | |
| MASCARA-4b | 2250 K | 7810 K | Ca, Cr, Fe, H, Mg, Mn, Na, Ni, Rb, Sm, V | Ba+, Ca+, Fe+, Sc+, Ti+ | 2, 35, 36 | |
| TOI-1518b | 2492 K | 7300 K | Fe | 37 | ||
| WASP-12b | 2580 K | 6313 K | H, Na | 38 | ||
| WASP-18b | 2411 K | 6400 K | CO, H2O, OH | 39, 40 | ||
| WASP-19b | 2077 K | 5460 K | TiO | 41 | ||
| WASP-33b | 2710 K | 7430 K | Fe, H, Si, Ti, V | Ca+, Ti+ | CO, H2O, OH, TiO | 6, 30, 42–54 |
| WASP-76b | 2228 K | 6329 K | Ca, Co, Cr, Fe, H, K, Li, Mg, Mn, Na, Ni, O, V | Ba+, Ca+, Fe+, Sr+ | CO, HCN, H2O, OH, VO | 2, 11, 39, 55–72 |
| WASP-121b | 2358 K | 6586 K | Ca, Co, Cr, Fe, H, K, Li, Mg, Mn, Na, Ni, V | Ba+, Ca+, Fe+, Sc+, Sr+ | 2, 11, 63, 73–82 | |
| WASP-178b | 2470 K | 8640 K | H, Fe, Mg, Na | Fe+ | CO, H2O | this work, 83 |
| WASP-189b | 2641 K | 8000 K | Ca, Cr, Fe, H, Mg, Mn, Na, Ni, Sr, Ti, V | Ba+, Ca+, Fe+, Sr+, Ti+ | CO, TiO | 2, 11, 50, 84–88 |
Notes. (1) Bello-Arufe et al. (2022b), (2) Gandhi et al. (2023), (3) Hoeijmakers et al. (2018), (4) Hoeijmakers et al. (2019), (5) Yan & Henning (2018), (6) Yan et al. (2019), (7) Wyttenbach et al. (2020), (8) Kasper et al. (2021), (9) Pino et al. (2022), (10) Sánchez-López et al. (2022b), (11) Langeveld et al. (2022), (12) Bello-Arufe et al. (2022a), (13) Pai Asnodkar et al. (2022), (14) Borsa et al. (2021b), (15) Borsato et al. (2023), (16) Borsato et al. (2024), (17) Ridden-Harper et al. (2023), (18) Lowson et al. (2023), (19) Holmberg & Madhusudhan (2022), (20) Ramkumar et al. (2023), (21) Scandariato et al. (2023), (22) Guo et al. (2024), (23) Casasayas-Barris et al. (2018), (24) Casasayas-Barris et al. (2019), (25) Hoeijmakers et al. (2020a), (26) Nugroho et al. (2020b), (27) Stangret et al. (2020), (28) Borsa et al. (2022), (29) Yan et al. (2022b), (30) Cont et al. (2022b), (31) Fossati et al. (2023), (32) Kasper et al. (2023), (33) Johnson et al. (2023), (34) Petz et al. (2024), (35) Zhang et al. (2022), (36) Jiang et al. (2023), (37) Cabot et al. (2021), (38) Jensen et al. (2018), (39) Yan et al. (2023), (40) Brogi et al. (2023), (41) Sedaghati et al. (2021), (42) Nugroho et al. (2017), (43) Nugroho et al. (2020a), (44) Borsa et al. (2021c), (45) Yan et al. (2021), (46) Cont et al. (2021), (47) Nugroho et al. (2021), (48) Cont et al. (2022a), (49) Herman et al. (2022), (50) Yan et al. (2022a), (51) Finnerty et al. (2023), (52) van Sluijs et al. (2023), (53) Wright et al. (2023), (54) Yang et al. (2024), (55) Seidel et al. (2019), (56) Ehrenreich et al. (2020), (57) Landman et al. (2021), (58) Deibert et al. (2021), (59) Casasayas-Barris et al. (2021), (60) Seidel et al. (2021), (61) Kesseli & Snellen (2021), (62) Tabernero et al. (2021), (63) Azevedo Silva et al. (2022), (64) Kesseli et al. (2022), (65) Sánchez-López et al. (2022a), (66) Gandhi et al. (2022), (67) Kawauchi et al. (2022), (68) Deibert et al. (2023), (69) Pelletier et al. (2023), (70) Gandhi et al. (2024), (71) Maguire et al. (2024), (72) Weiner Mansfield et al. (2024), (73) Hoeijmakers et al. (2020b), (74) Ben-Yami et al. (2020), (75) Cabot et al. (2020), (76) Merritt et al. (2021), (77) Borsa et al. (2021a), (78) Hoeijmakers et al. (2024), (79) Gibson et al. (2022), (80) Seidel et al. (2023), (81) Maguire et al. (2023), (82) Young et al. (2024), (83) Damasceno et al. (2024), (84) Yan et al. (2020), (85) Stangret et al. (2022), (86) Prinoth et al. (2022), (87) Prinoth et al. (2023), (88) Prinoth et al. (2024).
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