V391 Pegasi b
V391 Pegasi b is a possible exoplanet that orbits the hot sub- dwarf V391 Pegasi every 1140 days . Due to its high mass , it is assumed that it is a gas planet .
discovery
The planet was created by Roberto Silvotti et al. discovered in 2007 . In doing so, the short-period pulsations of the subdwarf were used: Since these are very precise and predictable, periodic changes in the pulsation duration become noticeable through the influence of a massive companion. A current work from 2018 by the same group questions this. An upcoming evaluation of the TESS data could help to confirm or reject the exoplanet.
Circulation and mass
The planet orbits its star at a distance of approx. 1.7 astronomical units and has a minimum mass of approx. 1017 earth masses or 3.2 Jupiter masses.
Web links
- The exoplanet in the "Encyclopedia of Extrasolar Planets"
Individual evidence
- ↑ http://www.nature.com/nature/journal/v449/n7159/full/nature06143.html
- ↑ R. Silvotti et. al: The sdB pulsating star V391 Peg and its putative giant planet revisited after 13 years of time-series photometric data . In: Astronomy & Astrophysics . 611, 2018. arxiv : 1711.10942 . doi : 10.1051 / 0004-6361 / 201731473 .