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Quiet-Sun Mg ii h and k Line Profiles Derived from IRIS Full-Sun Mosaics. I. Reference Profiles and Center-to-limb Variation
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SYSNO ASEP 0548010 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Quiet-Sun Mg ii h and k Line Profiles Derived from IRIS Full-Sun Mosaics. I. Reference Profiles and Center-to-limb Variation Author(s) Gunár, Stanislav (ASU-R) RID, ORCID
Koza, J. (SK)
Schwartz, P. (SK)
Heinzel, Petr (ASU-R) RID, ORCID
Liu, Wenjuan (ASU-R) ORCIDArticle number 16 Source Title Astrophysical Journal Supplement Series. - : IoP Publishing - ISSN 0067-0049
Roč. 255, č. 1 (2021)Number of pages 20 s. Publication form Online - E Language eng - English Country US - United States Keywords solar ultraviolet emission ; solar atmosphere ; limb darkening Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) R&D Projects GA19-16890S GA ČR - Czech Science Foundation (CSF) GA19-17102S GA ČR - Czech Science Foundation (CSF) GA19-20632S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support ASU-R - RVO:67985815 UT WOS 000674460300001 EID SCOPUS 85111268813 DOI 10.3847/1538-4365/ac07ab Annotation We derived high-precision reference profiles of the Mg ii h and k lines that represent the quiet Sun during a minimum of the solar activity. To do so, we used the broad catalog of full-Sun mosaics obtained by the Interface Region Imaging Spectrograph (IRIS). To minimize the influence of the local variations due to the on-disk solar features and to achieve low levels of uncertainties, we used 12 IRIS full-Sun mosaics without sunspots or other significant signs of solar activity. These mosaics were obtained between 2019 April and 2020 September in the near-ultraviolet spectral range. In this paper, we present the disk-averaged reference profiles of Mg ii h and Mg ii k lines, together with a series of reference profiles spanning the distance between the disk center and the solar limb. These series of profiles offer a detailed representation of the center-to-limb variation of both Mg ii h and Mg ii k lines. The reference Mg ii h and k line profiles provided in this paper can be used as the incident radiation boundary condition for radiative-transfer modeling of prominences, spicules, and other coronal and chromospheric structures. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2022 Electronic address https://doi.org/10.3847/1538-4365/ac07ab
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