Jupiter's X‐Ray and UV Dark Polar Region

Dunn, W. R. and Weigt, D. M. and Grodent, D. and Yao, Z. H. and May, D. and Feigelman, K. and Sipos, B. and Fleming, D. and McEntee, S. and Bonfond, B. and Gladstone, G. R. and Johnson, R. E. and Jackman, C. M. and Guo, R. L. and Branduardi‐Raymont, G. and Wibisono, A. D. and Kraft, R. P. and Nichols, J. D. and Ray, L. C. (2022) Jupiter's X‐Ray and UV Dark Polar Region. Geophysical Research Letters, 49 (11). ISSN 0094-8276

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Abstract: We present 14 simultaneous Chandra X‐ray Observatory (CXO)‐Hubble Space Telescope (HST) observations of Jupiter's Northern X‐ray and ultraviolet (UV) aurorae from 2016 to 2019. Despite the variety of dynamic UV and X‐ray auroral structures, one region is conspicuous by its persistent absence of emission: the dark polar region (DPR). Previous HST observations have shown that very little UV emission is produced by the DPR. We find that the DPR also produces very few X‐ray photons. For all 14 observations, the low level of X‐ray emission from the DPR is consistent (within 2‐standard deviations) with scattered solar emission and/or photons spread by Chandra's Point Spread Function from known X‐ray‐bright regions. We therefore conclude that for these 14 observations the DPR produced no statistically significant detectable X‐ray signature.

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Journal Article
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Geophysical Research Letters
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08 Jun 2022 08:25
Last Modified:
09 Dec 2022 15:05