FAST INVERSION OF SOLAR Ca II SPECTRA
We present a fast (
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Veröffentlicht in: | The Astrophysical journal 2015-01, Vol.798 (2), p.1-9 |
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container_title | The Astrophysical journal |
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creator | Beck, C Choudhary, D P Rezaei, R Louis, R E |
description | We present a fast ( |
doi_str_mv | 10.1088/0004-637X/798/2/100 |
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The code uses an archive of spectra that are synthesized prior to the inversion under the assumption of local thermodynamic equilibrium (LTE). We show that it can be successfully applied to spectrograph data or more sparsely sampled spectra from two-dimensional spectrometers. From a comparison to a non-LTE inversion of the same set of spectra, we derive a first-order non-LTE correction to the temperature stratifications derived in the LTE approach. The correction factor is close to unity up to log [tau] ~ -3 and increases to values of 2.5 and 4 at log [tau] = -6 in the quiet Sun and the umbra, respectively.</description><identifier>ISSN: 1538-4357</identifier><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/798/2/100</identifier><language>eng</language><publisher>United States</publisher><subject>Archives ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; CALCIUM IONS ; CHROMOSPHERE ; COMPARATIVE EVALUATIONS ; CORRECTIONS ; DATA ANALYSIS ; EMISSION SPECTRA ; Inversions ; LTE ; PHOTOSPHERE ; Spectra ; STRATIFICATION ; SUN ; Two dimensional ; TWO-DIMENSIONAL CALCULATIONS ; Umbras ; Unity</subject><ispartof>The Astrophysical journal, 2015-01, Vol.798 (2), p.1-9</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c318t-40c7f952e45e0bd2de2976725dfe3de8679624d21e67876d2eb568ddb40a3a7e3</citedby><cites>FETCH-LOGICAL-c318t-40c7f952e45e0bd2de2976725dfe3de8679624d21e67876d2eb568ddb40a3a7e3</cites><orcidid>0000-0001-7706-4158</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27903,27904</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22364643$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Beck, C</creatorcontrib><creatorcontrib>Choudhary, D P</creatorcontrib><creatorcontrib>Rezaei, R</creatorcontrib><creatorcontrib>Louis, R E</creatorcontrib><title>FAST INVERSION OF SOLAR Ca II SPECTRA</title><title>The Astrophysical journal</title><description>We present a fast (<<1 s per profile) inversion code for solar Ca II lines. The code uses an archive of spectra that are synthesized prior to the inversion under the assumption of local thermodynamic equilibrium (LTE). We show that it can be successfully applied to spectrograph data or more sparsely sampled spectra from two-dimensional spectrometers. From a comparison to a non-LTE inversion of the same set of spectra, we derive a first-order non-LTE correction to the temperature stratifications derived in the LTE approach. 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subjects | Archives ASTROPHYSICS, COSMOLOGY AND ASTRONOMY CALCIUM IONS CHROMOSPHERE COMPARATIVE EVALUATIONS CORRECTIONS DATA ANALYSIS EMISSION SPECTRA Inversions LTE PHOTOSPHERE Spectra STRATIFICATION SUN Two dimensional TWO-DIMENSIONAL CALCULATIONS Umbras Unity |
title | FAST INVERSION OF SOLAR Ca II SPECTRA |
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