CFHTWIR-Oph 98 b
| File:CFHTWIR-Oph 98 AB WFC3.jpg Hubble image of Oph 98 AB | |
| Discovery | |
|---|---|
| Discovered by | Fontanive et al. |
| Discovery date | 2020 |
| Direct imaging | |
| Orbital characteristics | |
| 200±6 AU (mean separation) | |
| Star | CFHTWIR-Oph 98 A |
| Physical characteristics[a] | |
| 1.86±0.05 RJ | |
| Mass | 7.8+0.7 −0.8 MJ |
| Temperature | 1800±40 K |
Spectral type | L2-L6 |
CFHTWIR-Oph 98 B is a substellar object, either an exoplanet or a sub-brown dwarf that orbits CFHTWIR-Oph 98 A, a M-type brown dwarf.[1] The pair form a binary system. The primary is a M9–L1 dwarf and the secondary is an L dwarf with a spectral type of L2–L6. Both spectral types are estimated from photometry. The pair is separated by 200 astronomical units and has a low gravitational binding energy.[2] The primary Oph 98A has a spectrum taken in 2012 with VLT/ISAAC, matching a spectral type of M9.75 and from Spitzer photometry and near-infrared photometry it is surrounded by a class II disk.[3] This disk has a mass of 0.135 MJ according to a study using SED-modelling.[4]
Formation
[edit | edit source]It orbits a star but its formation as an exoplanet is challenging or impossible.[2] If its formation scenario is known, it may explain the formation of Planet Nine. Planetary migration may explain its formation, or it may be a brown dwarf.
See also
[edit | edit source]Notes
[edit | edit source]- ^ for age of 3 Myr
References
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- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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