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Jupiter's x-ray and UV Dark Polar region

Jupiter's x-ray and UV Dark Polar region
Jupiter's x-ray and UV Dark Polar region
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.
Chandra X-ray Observatory, Hubble Space Telescope, Jupiter, aurora, dark polar region, magnetosphere
0094-8276
Dunn, W. R.
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Weigt, D. M.
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Grodent, D.
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Yao, Z. H.
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May, D.
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Feigelman, K.
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Sipos, B.
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Fleming, D.
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McEntee, S.
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Bonfond, B.
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Gladstone, G. R.
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Jackman, C. M.
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Guo, R. L.
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Branduardi-Raymont, G.
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Wibisono, A. D.
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Kraft, R. P.
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Nichols, J. D.
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Ray, L. C.
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et al.
Dunn, W. R.
ce8d659a-2bbb-4331-9807-b555b9907549
Weigt, D. M.
3ed9f7fd-d7e3-4082-8a61-679e9ffa6c9b
Grodent, D.
a8973000-3a4b-4481-8509-919933aa0a32
Yao, Z. H.
2ebadd26-0227-4aaf-b298-12642b7d8089
May, D.
b2abf502-3a3d-4367-a7fc-38bce3519a97
Feigelman, K.
6f7f6736-f127-424f-ba70-ed279cb29d94
Sipos, B.
6846f620-72d0-4b26-beb0-0f7b42d88545
Fleming, D.
bd738ea2-f84e-455a-ba51-3a36a090ec4d
McEntee, S.
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Bonfond, B.
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Gladstone, G. R.
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Jackman, C. M.
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Guo, R. L.
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Branduardi-Raymont, G.
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Wibisono, A. D.
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Kraft, R. P.
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Nichols, J. D.
d355c18a-4a5e-4d0f-a8f4-d32efa4b5128
Ray, L. C.
3a20898f-0b2e-469a-9112-41ff50f8324f

Dunn, W. R., Weigt, D. M., Grodent, D. and Jackman, C. M. , et al. (2022) Jupiter's x-ray and UV Dark Polar region. Geophysical Research Letters, 49 (11), [e2021GL097390]. (doi:10.1029/2021GL097390).

Record type: Article

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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Accepted/In Press date: 31 May 2022
Published date: 16 June 2022
Additional Information: Funding Information: The authors greatly thank the NASA Chandra and Hubble Space Telescope Projects for their support. WRD and GBR acknowledge support from STFC consolidated grant ST/S000240/1 to University College London (UCL). DMW is supported by the Science and Technology Facilities Council (STFC) studentship ST/S505703/1 and long‐term attachment grant to work at the Dublin Institute for Advanced Studies (DIAS). ADW was supported by the Science and Technology Facilities Council (STFC) (Project no. 2062546). DG and BB acknowledge the financial support from the Belgian Federal Science Policy Office (BELSPO) via the PRODEX Programme of ESA. BB is a Research Associate of the Fonds de la Recherche Scientifique‐FNRS. ZHY acknowledges the Key Research Program of the Institute of Geology and Geophysics, CAS, Grant no. IGGCAS‐201904. ZHY was supported by National Natural Science Foundation of China grants 42074211 and Key Research Program of the Institute of Geology and Geophysics, CAS, Grant No. IGGCAS‐201904. GRG was supported through NASA funding through contract NNM06AA75C with Southwest Research Institute, San Antonio, TX, USA. CMJ and SMcE work at DIAS are funded by Science Foundation Ireland Grant 18/FRL/6199. WRD would further like to thank the UKSA, UCL Widening Participation, and UCL Astro Group for the funding support for Orbyts. He also greatly thanks N. Achilleos, S. Badman, and D. Moral Pombo for their invaluable discussions and support. Publisher Copyright: © 2022. The Authors.
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Keywords: Chandra X-ray Observatory, Hubble Space Telescope, Jupiter, aurora, dark polar region, magnetosphere
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Identifiers

Local EPrints ID: 475434
URI: http://eprints.soton.ac.uk/id/eprint/475434
DOI: doi:10.1029/2021GL097390
ISSN: 0094-8276
PURE UUID: 29d21d13-57aa-461d-9c17-8dcf0859a799
ORCID for C. M. Jackman: ORCID iD orcid.org/0000-0003-0635-7361

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Date deposited: 17 Mar 2023 17:38
Last modified: 05 Jun 2024 19:32

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Contributors

Author: W. R. Dunn
Author: D. M. Weigt
Author: D. Grodent
Author: Z. H. Yao
Author: D. May
Author: K. Feigelman
Author: B. Sipos
Author: D. Fleming
Author: S. McEntee
Author: B. Bonfond
Author: G. R. Gladstone
Author: C. M. Jackman ORCID iD
Author: R. L. Guo
Author: G. Branduardi-Raymont
Author: A. D. Wibisono
Author: R. P. Kraft
Author: J. D. Nichols
Author: L. C. Ray
Corporate Author: et al.

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