CFHTWIR-Oph 98 b
Substellar object in a binary system
From Wikipedia, the free encyclopedia
CFHTWIR-Oph 98 B is a planetary-mass companion that orbits CFHTWIR-Oph 98 A, a M-type brown dwarf.[2] 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.[1] 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]
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[1][a] | |
| 1.86±0.05 RJ | |
| Mass | 7.8+0.7 −0.8 MJ |
| Temperature | 1800±40 K |
Spectral type | L2-L6 |
Formation
It orbits a star but its formation as an exoplanet is challenging or impossible.[1] 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.[citation needed]
See also
Notes
- for age of 3 Myr
