Electromagnetic signals from planetary collisions

Details Electromagnetic signals from planetary collisions Electromagnetic signals from planetary collisions

2003-08-12

arxiv.org/abs/astro-ph/0308218v1

Astrophys.J.596:L95-L98,2003

Astronomy and Astrophysics

Astrophysics

5 pages, emulateapj, accepted for publication in ApJ Letters

Scientific paper

10.1086/379186

Planet-planet collisions are expected during the early stages of the formation of extra-solar planets, and are also possible in mature planetary systems through secular planet-planet perturbations. We investigate the electromagnetic signals accompanied with these planetary collisions and their event rate, and explore the possibility of directly detecting such events. A typical Earth-Jupiter collision would give rise to a prompt EUV-soft-X-ray flash lasting for hours and a bright IR afterglow lasting for thousands of years. It is suggested that with the current and forthcoming observational technology and facilities, some of these collisional flashes or the post-collision remnants could be discovered.

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