Insight into atmospheres of extrasolar planets through plasma processes

Ch Helling; I. Vorgul

doi:10.1553/PRE8s335

Insight into atmospheres of extrasolar planets through plasma processes

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Extrasolar planets appear in a chemical diversity unseen in our own solar system. Despite their atmospheres being cold, continuous and transient plasma processes do affect these atmosphere where clouds form with great efficiency. Clouds can be very dynamic due to winds for example in highly irradiated planets like HD 189733b, and lightning may emerge. Lightning, and discharge events in general, leave spectral fingerprints, for example due to the formation of HCN. During the interaction, lightning or other flash--ionisation events also change the electromagnetic field of a coherent, high energy emission which results a characteristic damping of the initial, unperturbed (e.g. cyclotron emission) radiation beam. We summarise this as 'recipe for observers'. External ionisation by X-ray or UV e.g. from within the interstellar medium or from a white dwarf companion will introduce additional ionisation leading to the formation of a chromosphere. Signatures of plasma processes therefore allow for an alternative way to study atmospheres of extrasolar planets and brown dwarfs.

Original language	English
Title of host publication	Planetary Radio Emissions VIII
Subtitle of host publication	Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016
Editors	Georg Fischer, Gottfried Mann, Mykhaylo Panchenko, Phillipe Zarka
Place of Publication	Wien
Publisher	Austrian Academy of Sciences Press
Pages	335-344
ISBN (Electronic)	9783700183921
ISBN (Print)	9783700182634
DOIs	https://doi.org/10.1553/PRE8s335
Publication status	Published - 16 Aug 2018
Event	8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions - Seggauberg near Graz, Austria Duration: 25 Oct 2016 → 27 Oct 2016 Conference number: 8 http://pre8.oeaw.ac.at/

Workshop

Workshop	8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions
Abbreviated title	PRE VIII
Country/Territory	Austria
City	Seggauberg near Graz
Period	25/10/16 → 27/10/16
Internet address	http://pre8.oeaw.ac.at/

Access to Document

10.1553/PRE8s335

http://arxiv.org/abs/1710.03004v1

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Helling, C., & Vorgul, I. (2018). Insight into atmospheres of extrasolar planets through plasma processes. In G. Fischer, G. Mann, M. Panchenko, & P. Zarka (Eds.), Planetary Radio Emissions VIII: Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016 (pp. 335-344). Austrian Academy of Sciences Press. https://doi.org/10.1553/PRE8s335

Helling, Ch ; Vorgul, I. / Insight into atmospheres of extrasolar planets through plasma processes. Planetary Radio Emissions VIII: Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016. editor / Georg Fischer ; Gottfried Mann ; Mykhaylo Panchenko ; Phillipe Zarka. Wien : Austrian Academy of Sciences Press, 2018. pp. 335-344

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title = "Insight into atmospheres of extrasolar planets through plasma processes",

abstract = "Extrasolar planets appear in a chemical diversity unseen in our own solar system. Despite their atmospheres being cold, continuous and transient plasma processes do affect these atmosphere where clouds form with great efficiency. Clouds can be very dynamic due to winds for example in highly irradiated planets like HD 189733b, and lightning may emerge. Lightning, and discharge events in general, leave spectral fingerprints, for example due to the formation of HCN. During the interaction, lightning or other flash--ionisation events also change the electromagnetic field of a coherent, high energy emission which results a characteristic damping of the initial, unperturbed (e.g. cyclotron emission) radiation beam. We summarise this as 'recipe for observers'. External ionisation by X-ray or UV e.g. from within the interstellar medium or from a white dwarf companion will introduce additional ionisation leading to the formation of a chromosphere. Signatures of plasma processes therefore allow for an alternative way to study atmospheres of extrasolar planets and brown dwarfs. ",

author = "Ch Helling and I. Vorgul",

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editor = "Georg Fischer and Gottfried Mann and Mykhaylo Panchenko and Phillipe Zarka",

booktitle = "Planetary Radio Emissions VIII",

publisher = "Austrian Academy of Sciences Press",

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Helling, C & Vorgul, I 2018, Insight into atmospheres of extrasolar planets through plasma processes. in G Fischer, G Mann, M Panchenko & P Zarka (eds), Planetary Radio Emissions VIII: Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016. Austrian Academy of Sciences Press, Wien, pp. 335-344, 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions, Seggauberg near Graz, Austria, 25/10/16. https://doi.org/10.1553/PRE8s335

Insight into atmospheres of extrasolar planets through plasma processes. / Helling, Ch; Vorgul, I.
Planetary Radio Emissions VIII: Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016. ed. / Georg Fischer; Gottfried Mann; Mykhaylo Panchenko; Phillipe Zarka. Wien: Austrian Academy of Sciences Press, 2018. p. 335-344.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Insight into atmospheres of extrasolar planets through plasma processes

AU - Helling, Ch

AU - Vorgul, I.

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N2 - Extrasolar planets appear in a chemical diversity unseen in our own solar system. Despite their atmospheres being cold, continuous and transient plasma processes do affect these atmosphere where clouds form with great efficiency. Clouds can be very dynamic due to winds for example in highly irradiated planets like HD 189733b, and lightning may emerge. Lightning, and discharge events in general, leave spectral fingerprints, for example due to the formation of HCN. During the interaction, lightning or other flash--ionisation events also change the electromagnetic field of a coherent, high energy emission which results a characteristic damping of the initial, unperturbed (e.g. cyclotron emission) radiation beam. We summarise this as 'recipe for observers'. External ionisation by X-ray or UV e.g. from within the interstellar medium or from a white dwarf companion will introduce additional ionisation leading to the formation of a chromosphere. Signatures of plasma processes therefore allow for an alternative way to study atmospheres of extrasolar planets and brown dwarfs.

AB - Extrasolar planets appear in a chemical diversity unseen in our own solar system. Despite their atmospheres being cold, continuous and transient plasma processes do affect these atmosphere where clouds form with great efficiency. Clouds can be very dynamic due to winds for example in highly irradiated planets like HD 189733b, and lightning may emerge. Lightning, and discharge events in general, leave spectral fingerprints, for example due to the formation of HCN. During the interaction, lightning or other flash--ionisation events also change the electromagnetic field of a coherent, high energy emission which results a characteristic damping of the initial, unperturbed (e.g. cyclotron emission) radiation beam. We summarise this as 'recipe for observers'. External ionisation by X-ray or UV e.g. from within the interstellar medium or from a white dwarf companion will introduce additional ionisation leading to the formation of a chromosphere. Signatures of plasma processes therefore allow for an alternative way to study atmospheres of extrasolar planets and brown dwarfs.

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A2 - Fischer, Georg

A2 - Mann, Gottfried

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Helling C, Vorgul I. Insight into atmospheres of extrasolar planets through plasma processes. In Fischer G, Mann G, Panchenko M, Zarka P, editors, Planetary Radio Emissions VIII: Proceedings of the 8th International Workshop on Planetary, Solar and Heliospheric Radio Emissions held at Seggauberg near Graz, Austria, October 25–27, 2016. Wien: Austrian Academy of Sciences Press. 2018. p. 335-344 doi: 10.1553/PRE8s335

Insight into atmospheres of extrasolar planets through plasma processes

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