Kepler-1625b I
It has been suggested that this article be merged into Kepler-1625b. (Discuss) Proposed since January 2024. |
Discovery[2] | |
---|---|
Discovered by | Alex Teachey, David M. Kipping and Allan R. Schmitt |
Discovery date | 2017 |
Primary transit | |
Orbital characteristics | |
Satellite of | Kepler-1625b |
Physical characteristics | |
Mean radius | 0.437 RJ |
Mass | 19.069 M🜨 0.06 MJ[3] |
Mean density | 0.95 g/cm3 |
Kepler-1625b I, a possible
Kepler Space Telescope.[4] A more thorough observing campaign by the Hubble Space Telescope took place in October 2017, ultimately leading to a discovery paper published in Science Advances in early October 2018. Studies related to the discovery of this moon suggest that the host exoplanet is up to several Jupiter masses in size, and the moon is thought to be approximately the mass of Neptune. Like several moons in the Solar System,[5] the large exomoon would theoretically be able to host its own moon, called a subsatellite, in a stable orbit, although no evidence for such a subsatellite has been found.[6]
Studies and observations
The original papertransit timing variation indicating a Neptune-mass moon, and a photometric dip indicating a Neptune-radius moon. An independent re-analysis of the observations published in February 2019[7] recovered both but suggested that an inclined and hidden hot-Jupiter could also be responsible, which could be tested with future Doppler spectroscopy radial velocity observations. A third study analyzing this data set recovered the transit timing variation signature but not the photometric dip, and thus questioned the exomoon hypothesis.[8] The original discovery team later addressed this paper, finding that their re-reduction exhibits higher systematics that may explain their differing conclusions.[9]
See also
References
- ^ Chou, Felicia; Villard, Ray; Hawkes, Alison; Brown, Katherine (3 October 2018). "Astronomers Find First Evidence of Possible Moon Outside Our Solar System". NASA. Retrieved 5 October 2018.
- ^ PMID 30306135.
- ^ "The Extrasolar Planet Encyclopaedia — Kepler-1625 b I". Extrasolar Planets Encyclopaedia. Archived from the original on 5 October 2018. Retrieved 7 October 2018.
- S2CID 118911978.
- .
- S2CID 118857039.
- S2CID 119311103.
- S2CID 129945202.
- S2CID 135465103.