Suprathermal Spontaneous Emissions in κ-distributed Plasmas
A suprathermal spectral component is identified in the spontaneous emissions of κ-distributed plasma populations, ubiquitous in astrophysical setups. Theoretical power spectra are confirmed by the simulations and capture the dispersion characteristics of electrostatic and electromagnetic eigenmodes...
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| Veröffentlicht in: | Astrophysical journal. Letters 2018-12, Vol.868 (2), p.L25 |
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| container_title | Astrophysical journal. Letters |
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| creator | Lazar, M. Kim, S. López, R. A. Yoon, P. H. Schlickeiser, R. Poedts, S. |
| description | A suprathermal spectral component is identified in the spontaneous emissions of κ-distributed plasma populations, ubiquitous in astrophysical setups. Theoretical power spectra are confirmed by the simulations and capture the dispersion characteristics of electrostatic and electromagnetic eigenmodes of a quasi-stable magnetized plasma. Selectively enhanced by the suprathermal emissions are the fluctuations of fast modes (e.g., Langmuir, fast magnetosonic, or the low-wavenumber branches of kinetic Alfvén and Bernstein waves) induced resonantly by the energetic (suprathermal) particles. These results have an immediate implication in spectroscopic techniques of in situ or remote diagnosis for the very hot and dense plasmas, e.g., close to the Sun, where direct measurements of plasma particles and their properties are technically impossible. Contrasting patterns of suprathermal emissions may confirm the coronal origin of the suprathermal populations observed in the solar wind. |
| doi_str_mv | 10.3847/2041-8213/aaefec |
| format | Article |
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These results have an immediate implication in spectroscopic techniques of in situ or remote diagnosis for the very hot and dense plasmas, e.g., close to the Sun, where direct measurements of plasma particles and their properties are technically impossible. Contrasting patterns of suprathermal emissions may confirm the coronal origin of the suprathermal populations observed in the solar wind.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/aaefec</identifier><language>eng</language><publisher>Austin: The American Astronomical Society</publisher><subject>Bernstein waves ; Dense plasmas ; Langmuir waves ; methods: analytical ; methods: numerical ; Populations ; Power spectra ; radiation mechanisms: non-thermal ; radiation mechanisms: thermal ; Solar wind ; Sun: corona ; Variation ; Wavelengths</subject><ispartof>Astrophysical journal. Letters, 2018-12, Vol.868 (2), p.L25</ispartof><rights>2018. 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A.</creatorcontrib><creatorcontrib>Yoon, P. H.</creatorcontrib><creatorcontrib>Schlickeiser, R.</creatorcontrib><creatorcontrib>Poedts, S.</creatorcontrib><title>Suprathermal Spontaneous Emissions in κ-distributed Plasmas</title><title>Astrophysical journal. Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>A suprathermal spectral component is identified in the spontaneous emissions of κ-distributed plasma populations, ubiquitous in astrophysical setups. Theoretical power spectra are confirmed by the simulations and capture the dispersion characteristics of electrostatic and electromagnetic eigenmodes of a quasi-stable magnetized plasma. Selectively enhanced by the suprathermal emissions are the fluctuations of fast modes (e.g., Langmuir, fast magnetosonic, or the low-wavenumber branches of kinetic Alfvén and Bernstein waves) induced resonantly by the energetic (suprathermal) particles. These results have an immediate implication in spectroscopic techniques of in situ or remote diagnosis for the very hot and dense plasmas, e.g., close to the Sun, where direct measurements of plasma particles and their properties are technically impossible. Contrasting patterns of suprathermal emissions may confirm the coronal origin of the suprathermal populations observed in the solar wind.</description><subject>Bernstein waves</subject><subject>Dense plasmas</subject><subject>Langmuir waves</subject><subject>methods: analytical</subject><subject>methods: numerical</subject><subject>Populations</subject><subject>Power spectra</subject><subject>radiation mechanisms: non-thermal</subject><subject>radiation mechanisms: thermal</subject><subject>Solar wind</subject><subject>Sun: corona</subject><subject>Variation</subject><subject>Wavelengths</subject><issn>2041-8205</issn><issn>2041-8213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kMtKAzEUhoMoWKt7lwOCK8fm3gy4kVIvUFCorsNpmmDKzCQmMwtfzYfwmWwZqRtxdQ6H7_8PfAidE3zNFJ9OKOakVJSwCYB11hyg0f50uN-xOEYnOW8wplgSNUI3yz4m6N5saqAuljG0HbQ29LmYNz5nH9pc-Lb4-izXPnfJr_rOrovnGnID-RQdOaizPfuZY_R6N3-ZPZSLp_vH2e2iNEyRrmScga2cqAw1U8KEdaCIqsByUM5KqwzHglZGSmDGCQ5sxewUCyKowQIYG6OLoTem8N7b3OlN6FO7fakpk0JyQgjeUnigTAo5J-t0TL6B9KEJ1jtHeidB74TowdE2cjVEfIi_nf_gl3_gEDe1VlJpqhdU6Lh27BsyWHcS</recordid><startdate>20181201</startdate><enddate>20181201</enddate><creator>Lazar, M.</creator><creator>Kim, S.</creator><creator>López, R. A.</creator><creator>Yoon, P. H.</creator><creator>Schlickeiser, R.</creator><creator>Poedts, S.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-3171-5079</orcidid><orcidid>https://orcid.org/0000-0001-8134-3790</orcidid><orcidid>https://orcid.org/0000-0002-8508-5466</orcidid><orcidid>https://orcid.org/0000-0002-1743-0651</orcidid></search><sort><creationdate>20181201</creationdate><title>Suprathermal Spontaneous Emissions in κ-distributed Plasmas</title><author>Lazar, M. ; Kim, S. ; López, R. A. ; Yoon, P. H. ; Schlickeiser, R. ; Poedts, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c381t-343ae9f59c2c7135efa8189ae4a8fe6e8c40529c66a3cf54a3b3e705152c05a33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Bernstein waves</topic><topic>Dense plasmas</topic><topic>Langmuir waves</topic><topic>methods: analytical</topic><topic>methods: numerical</topic><topic>Populations</topic><topic>Power spectra</topic><topic>radiation mechanisms: non-thermal</topic><topic>radiation mechanisms: thermal</topic><topic>Solar wind</topic><topic>Sun: corona</topic><topic>Variation</topic><topic>Wavelengths</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lazar, M.</creatorcontrib><creatorcontrib>Kim, S.</creatorcontrib><creatorcontrib>López, R. A.</creatorcontrib><creatorcontrib>Yoon, P. H.</creatorcontrib><creatorcontrib>Schlickeiser, R.</creatorcontrib><creatorcontrib>Poedts, S.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astrophysical journal. Letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Lazar, M.</au><au>Kim, S.</au><au>López, R. A.</au><au>Yoon, P. H.</au><au>Schlickeiser, R.</au><au>Poedts, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Suprathermal Spontaneous Emissions in κ-distributed Plasmas</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2018-12-01</date><risdate>2018</risdate><volume>868</volume><issue>2</issue><spage>L25</spage><pages>L25-</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>A suprathermal spectral component is identified in the spontaneous emissions of κ-distributed plasma populations, ubiquitous in astrophysical setups. Theoretical power spectra are confirmed by the simulations and capture the dispersion characteristics of electrostatic and electromagnetic eigenmodes of a quasi-stable magnetized plasma. Selectively enhanced by the suprathermal emissions are the fluctuations of fast modes (e.g., Langmuir, fast magnetosonic, or the low-wavenumber branches of kinetic Alfvén and Bernstein waves) induced resonantly by the energetic (suprathermal) particles. These results have an immediate implication in spectroscopic techniques of in situ or remote diagnosis for the very hot and dense plasmas, e.g., close to the Sun, where direct measurements of plasma particles and their properties are technically impossible. Contrasting patterns of suprathermal emissions may confirm the coronal origin of the suprathermal populations observed in the solar wind.</abstract><cop>Austin</cop><pub>The American Astronomical Society</pub><doi>10.3847/2041-8213/aaefec</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-3171-5079</orcidid><orcidid>https://orcid.org/0000-0001-8134-3790</orcidid><orcidid>https://orcid.org/0000-0002-8508-5466</orcidid><orcidid>https://orcid.org/0000-0002-1743-0651</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Bernstein waves Dense plasmas Langmuir waves methods: analytical methods: numerical Populations Power spectra radiation mechanisms: non-thermal radiation mechanisms: thermal Solar wind Sun: corona Variation Wavelengths |
| title | Suprathermal Spontaneous Emissions in κ-distributed Plasmas |
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