Abstract
TYC 8830 410 1 is a very dusty, intermediate-age, main sequence, Sun-like star. Optical monitoring of the star over several years has identified a transiting body with a period near 167 days that blocks >50% of the host star's optical light in each transit event, but radial velocity monitoring limits any orbiting companion to planet masses. We present a suite of ground- and space-based observations that have been used to characterize the star and its orbiting bodies, resulting in several outstanding enigmas. Chief among them are what appears to be transit timing variations in the arrival of the deep transit events, a dust grain distribution skewed to sub-micron sizes, significant radial velocity jitter that is not due to stellar activity, and what appears to be actively disappearing dust over the 2023-2024 timeframe. We explore an interpretation where TYC 8830 410 1 experienced a dramatic planetary system instability that has driven two major planets to collide.
| Original language | English |
|---|---|
| Number of pages | 1 |
| Publication status | Published - Aug 2024 |
| Event | 32nd General Assembly International Union - Cape Town, South Africa Duration: 6 Aug 2024 → 15 Aug 2024 https://www.iau.org/science/meetings/past/general_assemblies/2396/ |
Conference
| Conference | 32nd General Assembly International Union |
|---|---|
| Abbreviated title | IAUGA 2024 |
| Country/Territory | South Africa |
| City | Cape Town |
| Period | 6/08/24 → 15/08/24 |
| Internet address |
Bibliographical note
Complete author list:Melis, Carl ; Paredes, Leonardo ; Millar-Blanchaer, Maxwell ; Launhardt, Ralf ; Mann, Christopher ; Olofsson, Johan ; Lillo-Box, Jorge ; Weinberger, Alycia ; Kennedy, Grant ; Guillot, Tristan ; Triaud, Amaury