对土星、乌拉斯与海王星 X 射线辐射的搜索
摘要
We present an analysis of X-ray observations of the trans-Jovian planets Saturn, Uranus and Neptune with the ROSAT PSPC in comparison with X-ray observations of Jupiter. For the first time a marginal X-ray detection of Saturn was found and 95% confidence upper limits for Uranus and Neptune were obtained. These upper limits show that Jupiter-like X-ray luminosities can be excluded for all three planets, while they are consistent assuming intrinsic Saturn-like X-ray luminosities. Similar X-ray production mechanisms on all trans-Jovian planets can therefore not be ruled out, and spectral shape and total luminosity observed from Saturn are consistent with thick-target bremsstrahlung caused by electron precipitation as occurring in auroral emission from the Earth.
关键词
引用
@article{arxiv.astro-ph/0001131,
title = {A Search for X-ray emission from Saturn, Uranus and Neptune},
author = {Jan-Uwe Ness and Juergen H. M. M. Schmitt},
journal= {arXiv preprint arXiv:astro-ph/0001131},
year = {2007}
}
备注
Accepted to Astronomy and Astrophysics, January 2000. 4 pages, no figures