Do Photospheric Brightness Structures Outside Magnetic Flux Tubes Contribute to Solar Luminosity Variation?
Variations in total solar irradiance (TSI) correlate well with changes in projected area of photospheric magnetic flux tubes associated with dark sunspots and bright faculae in active regions and network. This correlation does not, however, rule out possible TSI contributions from photospheric brigh...
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| Veröffentlicht in: | Solar physics 2008-03, Vol.248 (1), p.1-15 |
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| creator | Foukal, Peter Bernasconi, Pietro N. |
| description | Variations in total solar irradiance (TSI) correlate well with changes in projected area of photospheric magnetic flux tubes associated with dark sunspots and bright faculae in active regions and network. This correlation does not, however, rule out possible TSI contributions from photospheric brightness inhomogeneities located
outside
flux tubes and
spatially correlated with them
. Previous reconstructions of TSI report agreement with radiometry that seems to rule out significant “extra-flux-tube” contributions. We show that these reconstructions are more sensitive to the facular contrasts used than has been generally recognized. Measurements with the Solar Bolometric Imager (SBI) provide the first reliable support for the relatively high, wide-band, disk-center contrasts required to produce 10% rms agreement. Longer term bolometric imaging will be required to determine whether the small but systematic TSI residuals we see here are caused by remaining errors in spot and facular areas and contrasts or by extra-flux-tube brightness structures such as bright rings around sunspots or “convective stirring” around active regions. |
| doi_str_mv | 10.1007/s11207-008-9134-7 |
| format | Article |
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outside
flux tubes and
spatially correlated with them
. Previous reconstructions of TSI report agreement with radiometry that seems to rule out significant “extra-flux-tube” contributions. We show that these reconstructions are more sensitive to the facular contrasts used than has been generally recognized. Measurements with the Solar Bolometric Imager (SBI) provide the first reliable support for the relatively high, wide-band, disk-center contrasts required to produce 10% rms agreement. Longer term bolometric imaging will be required to determine whether the small but systematic TSI residuals we see here are caused by remaining errors in spot and facular areas and contrasts or by extra-flux-tube brightness structures such as bright rings around sunspots or “convective stirring” around active regions.</description><identifier>ISSN: 0038-0938</identifier><identifier>EISSN: 1573-093X</identifier><identifier>DOI: 10.1007/s11207-008-9134-7</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Astrophysics and Astroparticles ; Atmospheric Sciences ; Fluctuations ; Magnetism ; Physics ; Physics and Astronomy ; Solar physics ; Space Exploration and Astronautics ; Space Sciences (including Extraterrestrial Physics ; Studies</subject><ispartof>Solar physics, 2008-03, Vol.248 (1), p.1-15</ispartof><rights>Springer Science+Business Media B.V. 2008</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-341d7b01d23eba004db021088a3d34fac4c4fbbfffcf6a787eebca0bf688c8c13</citedby><cites>FETCH-LOGICAL-c378t-341d7b01d23eba004db021088a3d34fac4c4fbbfffcf6a787eebca0bf688c8c13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11207-008-9134-7$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11207-008-9134-7$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Foukal, Peter</creatorcontrib><creatorcontrib>Bernasconi, Pietro N.</creatorcontrib><title>Do Photospheric Brightness Structures Outside Magnetic Flux Tubes Contribute to Solar Luminosity Variation?</title><title>Solar physics</title><addtitle>Sol Phys</addtitle><description>Variations in total solar irradiance (TSI) correlate well with changes in projected area of photospheric magnetic flux tubes associated with dark sunspots and bright faculae in active regions and network. This correlation does not, however, rule out possible TSI contributions from photospheric brightness inhomogeneities located
outside
flux tubes and
spatially correlated with them
. Previous reconstructions of TSI report agreement with radiometry that seems to rule out significant “extra-flux-tube” contributions. We show that these reconstructions are more sensitive to the facular contrasts used than has been generally recognized. Measurements with the Solar Bolometric Imager (SBI) provide the first reliable support for the relatively high, wide-band, disk-center contrasts required to produce 10% rms agreement. Longer term bolometric imaging will be required to determine whether the small but systematic TSI residuals we see here are caused by remaining errors in spot and facular areas and contrasts or by extra-flux-tube brightness structures such as bright rings around sunspots or “convective stirring” around active regions.</description><subject>Astrophysics and Astroparticles</subject><subject>Atmospheric Sciences</subject><subject>Fluctuations</subject><subject>Magnetism</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Solar physics</subject><subject>Space Exploration and Astronautics</subject><subject>Space Sciences (including Extraterrestrial Physics</subject><subject>Studies</subject><issn>0038-0938</issn><issn>1573-093X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp9kU9rGzEQxUVoIa6bD5CbyKE9bTtaaS3tqbRO0hYcEkhaehOSVrKVrleO_kDz7SvjQiGQnGZgfu_BvIfQKYEPBIB_TIS0wBsA0fSEsoYfoRnpOG2gp79eoRkAFftdHKM3Kd0D7FXdDP0-D_hmE3JIu42N3uAv0a83ebIp4dsci8kl2oSvS05-sPhKrSebK3Y5lj_4ruh6W4YpR69LtjgHfBtGFfGqbP0Uks-P-KeKXmUfpk9v0WunxmRP_s05-nF5cbf81qyuv35ffl41hnKRG8rIwDWQoaVWKwA2aGgJCKHoQJlThhnmtHbOGbdQXHBrtVGg3UIIIwyhc_T-4LuL4aHYlOXWJ2PHUU02lCQ5o53oWY1kjt69SLawgJ73ooJnT8D7UOJUv5B00QnRdayvEDlAJoaUonVyF_1WxUdJQO7zloeWZG1J7luSvGragyZVdlrb-N_4edFfhAOXDQ</recordid><startdate>20080301</startdate><enddate>20080301</enddate><creator>Foukal, Peter</creator><creator>Bernasconi, Pietro N.</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L7M</scope><scope>M2P</scope><scope>P5Z</scope><scope>P62</scope><scope>PHGZM</scope><scope>PHGZT</scope><scope>PKEHL</scope><scope>PQEST</scope><scope>PQGLB</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope></search><sort><creationdate>20080301</creationdate><title>Do Photospheric Brightness Structures Outside Magnetic Flux Tubes Contribute to Solar Luminosity Variation?</title><author>Foukal, Peter ; Bernasconi, Pietro N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c378t-341d7b01d23eba004db021088a3d34fac4c4fbbfffcf6a787eebca0bf688c8c13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Astrophysics and Astroparticles</topic><topic>Atmospheric Sciences</topic><topic>Fluctuations</topic><topic>Magnetism</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Solar physics</topic><topic>Space Exploration and Astronautics</topic><topic>Space Sciences (including Extraterrestrial Physics</topic><topic>Studies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Foukal, Peter</creatorcontrib><creatorcontrib>Bernasconi, Pietro N.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Aerospace Database</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Science Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central (New)</collection><collection>ProQuest One Academic (New)</collection><collection>ProQuest One Academic Middle East (New)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Applied & Life Sciences</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><jtitle>Solar physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Foukal, Peter</au><au>Bernasconi, Pietro N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Do Photospheric Brightness Structures Outside Magnetic Flux Tubes Contribute to Solar Luminosity Variation?</atitle><jtitle>Solar physics</jtitle><stitle>Sol Phys</stitle><date>2008-03-01</date><risdate>2008</risdate><volume>248</volume><issue>1</issue><spage>1</spage><epage>15</epage><pages>1-15</pages><issn>0038-0938</issn><eissn>1573-093X</eissn><abstract>Variations in total solar irradiance (TSI) correlate well with changes in projected area of photospheric magnetic flux tubes associated with dark sunspots and bright faculae in active regions and network. This correlation does not, however, rule out possible TSI contributions from photospheric brightness inhomogeneities located
outside
flux tubes and
spatially correlated with them
. Previous reconstructions of TSI report agreement with radiometry that seems to rule out significant “extra-flux-tube” contributions. We show that these reconstructions are more sensitive to the facular contrasts used than has been generally recognized. Measurements with the Solar Bolometric Imager (SBI) provide the first reliable support for the relatively high, wide-band, disk-center contrasts required to produce 10% rms agreement. Longer term bolometric imaging will be required to determine whether the small but systematic TSI residuals we see here are caused by remaining errors in spot and facular areas and contrasts or by extra-flux-tube brightness structures such as bright rings around sunspots or “convective stirring” around active regions.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11207-008-9134-7</doi><tpages>15</tpages></addata></record> |
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| subjects | Astrophysics and Astroparticles Atmospheric Sciences Fluctuations Magnetism Physics Physics and Astronomy Solar physics Space Exploration and Astronautics Space Sciences (including Extraterrestrial Physics Studies |
| title | Do Photospheric Brightness Structures Outside Magnetic Flux Tubes Contribute to Solar Luminosity Variation? |
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