Evidence for a Large Exomoon Orbiting Kepler-1625b
| Autor: | Alex Teachey, David M. Kipping |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Solar System
010504 meteorology & atmospheric sciences Epoch (astronomy) Astronomy FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Jupiter Planet Neptune 0103 physical sciences 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Research Articles Solar and Stellar Astrophysics (astro-ph.SR) 0105 earth and related environmental sciences Earth and Planetary Astrophysics (astro-ph.EP) Physics Multidisciplinary Astrophysics::Instrumentation and Methods for Astrophysics Exomoon SciAdv r-articles Stars Astrophysics - Solar and Stellar Astrophysics Physics::Space Physics Natural satellite Astrophysics::Earth and Planetary Astrophysics Research Article Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Science Advances |
| Popis: | Hubble Space Telescope observations show a timing offset and an exomoon-like transit associated with a Jupiter-sized planet. Exomoons are the natural satellites of planets orbiting stars outside our solar system, of which there are currently no confirmed examples. We present new observations of a candidate exomoon associated with Kepler-1625b using the Hubble Space Telescope to validate or refute the moon’s presence. We find evidence in favor of the moon hypothesis, based on timing deviations and a flux decrement from the star consistent with a large transiting exomoon. Self-consistent photodynamical modeling suggests that the planet is likely several Jupiter masses, while the exomoon has a mass and radius similar to Neptune. Since our inference is dominated by a single but highly precise Hubble epoch, we advocate for future monitoring of the system to check model predictions and confirm repetition of the moon-like signal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|