Large Impacts around a Solar Analog Star in the Era of Terrestrial Planet Formation

Abstract

The final assembly of terrestrial planets occurs via massive collisions, which can launch copious clouds of dust that are warmed by the star and glow in the infrared. We report the real-time detection of a debris-producing impact in the terrestrial planet zone around a 35-million year-old solar analog star. We observed a substantial brightening of the debris disk at 3-5 μm, followed by a decay over a year, with quasi-periodic modulations of the disk flux. The behavior is consistent with the occurrence of a violent impact that produced vapor out of which a thick cloud of silicate spherules condensed that were ground into dust by collisions. These results demonstrate how the time domain can become a new dimension for the study of terrestrial planet formation.

25 pages, 7 figures (fixed a typo in name)

References in corpus (7)

• Radial velocity planets de-aliased. A new, short period for Super-Earth 55 Cnc e
• The Monitor project: Rotation of low-mass stars in the open cluster NGC 2516
• A heuristic derivation of the uncertainty of the frequency determination in time series data
• Collisional Stripping and Disruption of Super-Earths
• Variability of the Infrared Excess of Extreme Debris Disks
• The Monitor project: Rotation of low-mass stars in the open cluster NGC 2547
• Debris Disks in NGC 2547

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