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- W3098156795 abstract "Comparing chemical abundances of a planet and the host star reveals the origin and formation path. Stellar abundance is measured with high-resolution spectroscopy. Planet abundance, on the other hand, is usually inferred from low-resolution data. For directly imaged exoplanets, the data are available from a slew of high-contrast imaging/spectroscopy instruments. Here, we study the chemical abundance of HR 8799 and its planet c. We measure stellar abundance using LBT/PEPSI (R=120,000) and archival HARPS data: stellar [C/H], [O/H], and C/O are 0.11$pm$0.12, 0.12$pm$0.14, and 0.54$^{+0.12}_{-0.09}$, all consistent with solar values. We conduct atmospheric retrieval using newly obtained Subaru/CHARIS data together with archival Gemini/GPI and Keck/OSIRIS data. We model the planet spectrum with petitRADTRANS and conduct retrieval using PyMultiNest. Retrieved planetary abundance can vary by $sim$0.5 dex, from sub-stellar to stellar C and O abundances. The variation depends on whether strong priors are chosen to ensure a reasonable planet mass. Moreover, comparison with previous works also reveals inconsistency in abundance measurements. We discuss potential issues that can cause the inconsistency, e.g., systematics in individual data sets and different assumptions in the physics and chemistry in retrieval. We conclude that no robust retrieval can be obtained unless the issues are fully resolved." @default.
- W3098156795 created "2020-11-23" @default.
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- W3098156795 date "2020-09-01" @default.
- W3098156795 modified "2023-10-16" @default.
- W3098156795 title "On the Chemical Abundance of HR 8799 and the Planet c" @default.
- W3098156795 cites W1845592102 @default.
- W3098156795 cites W1978106706 @default.
- W3098156795 cites W1983551693 @default.
- W3098156795 cites W2001281871 @default.
- W3098156795 cites W2003272887 @default.
- W3098156795 cites W2023771571 @default.
- W3098156795 cites W2029384527 @default.
- W3098156795 cites W2039264982 @default.
- W3098156795 cites W2039591498 @default.
- W3098156795 cites W2043446198 @default.
- W3098156795 cites W2045895264 @default.
- W3098156795 cites W2047775701 @default.
- W3098156795 cites W2053609443 @default.
- W3098156795 cites W2055772557 @default.
- W3098156795 cites W2060819359 @default.
- W3098156795 cites W2073457993 @default.
- W3098156795 cites W2076328442 @default.
- W3098156795 cites W2087569457 @default.
- W3098156795 cites W2103997856 @default.
- W3098156795 cites W2105588528 @default.
- W3098156795 cites W2106723742 @default.
- W3098156795 cites W2135529459 @default.
- W3098156795 cites W2143403649 @default.
- W3098156795 cites W2168796777 @default.
- W3098156795 cites W2241283274 @default.
- W3098156795 cites W2340897870 @default.
- W3098156795 cites W2344963419 @default.
- W3098156795 cites W2489420726 @default.
- W3098156795 cites W2531263803 @default.
- W3098156795 cites W2565684633 @default.
- W3098156795 cites W2592855997 @default.
- W3098156795 cites W2752993778 @default.
- W3098156795 cites W2766138814 @default.
- W3098156795 cites W2772825691 @default.
- W3098156795 cites W2849565932 @default.
- W3098156795 cites W2890002093 @default.
- W3098156795 cites W2899497983 @default.
- W3098156795 cites W2920003897 @default.
- W3098156795 cites W2950535405 @default.
- W3098156795 cites W2950917080 @default.
- W3098156795 cites W2967367056 @default.
- W3098156795 cites W2973322687 @default.
- W3098156795 cites W2985117389 @default.
- W3098156795 cites W3098256914 @default.
- W3098156795 cites W3098407089 @default.
- W3098156795 cites W3098895872 @default.
- W3098156795 cites W3099046642 @default.
- W3098156795 cites W3099323328 @default.
- W3098156795 cites W3099350769 @default.
- W3098156795 cites W3099392655 @default.
- W3098156795 cites W3099714297 @default.
- W3098156795 cites W3100040818 @default.
- W3098156795 cites W3100377396 @default.
- W3098156795 cites W3100715420 @default.
- W3098156795 cites W3100716683 @default.
- W3098156795 cites W3100959409 @default.
- W3098156795 cites W3101022735 @default.
- W3098156795 cites W3101063076 @default.
- W3098156795 cites W3101074050 @default.
- W3098156795 cites W3101177523 @default.
- W3098156795 cites W3101303406 @default.
- W3098156795 cites W3101711875 @default.
- W3098156795 cites W3102094901 @default.
- W3098156795 cites W3102404352 @default.
- W3098156795 cites W3102960365 @default.
- W3098156795 cites W3104805830 @default.
- W3098156795 cites W3104990127 @default.
- W3098156795 cites W3105368785 @default.
- W3098156795 cites W3105587583 @default.
- W3098156795 cites W3123680416 @default.
- W3098156795 cites W3125459880 @default.
- W3098156795 cites W4288289876 @default.
- W3098156795 cites W4288485442 @default.
- W3098156795 cites W4289257553 @default.
- W3098156795 cites W4297628273 @default.
- W3098156795 cites W4302075273 @default.
- W3098156795 doi "https://doi.org/10.3847/1538-3881/ababa7" @default.
- W3098156795 hasPublicationYear "2020" @default.
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