caa a22 4500 445347007 CHVBK 20180317142832.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s11207-010-9706-1 doi (NATIONALLICENCE)springer-10.1007/s11207-010-9706-1 The WHI Corona from Differential Emission Measure Tomography [Elektronische Daten] [Alberto Vásquez, Zhenguang Huang, Ward Manchester IV, Richard Frazin] A three-dimensional (3D) tomographic reconstruction of the local differential emission measure (LDEM) of the global solar corona during the whole heliosphere interval (WHI, Carrington rotation CR2068) is presented, based on STEREO/EUVI images. We determine the 3D distribution of the electron density, mean temperature, and temperature spread, in the range of heliocentric heights 1.03 to 1.23R ⊙. The reconstruction is complemented with a potential-field source-surface (PFSS) magnetic-field model. The streamer-core, streamer-leg, and subpolar regions are analyzed and compared to a similar analysis previously performed for CR2077, very near the absolute minimum of Solar Cycle23. In each region, the typical values of density and temperature are similar in both periods. The WHI corona exhibits a streamer structure of relatively smaller volume and latitudinal extension than during CR2077, with a global closed-to-open density contrast about 6% lower, and a somewhat more complex morphology. The average basal electron density is found to be about 2.23 and 1.08×108cm−3, in the streamer core and subpolar regions, respectively. The electron temperature is quite uniform over the analyzed height range, with average values of about 1.13 and 0.93MK, in the streamer core and subpolar regions, respectively. Within the streamer closed region, both periods show higher temperatures at mid-latitudes and lower temperatures near the Equator. Both periods show β>1 in the streamer core and β<1 in the surrounding open regions, with CR2077 exhibiting a stronger contrast. Hydrostatic fits to the electron density are performed, and the scale height is compared to the LDEM mean electron temperature. Within the streamer core, the results are consistent with an isothermal hydrostatic plasma regime, with the temperatures of ions and electrons differing by up to about10%. In the subpolar open regions, the results are consistent with departures from thermal equilibrium with T ions>T e (and values of T ions/T e up to about1.5), and/or the presence of wave-pressure mechanisms linear in the density. Springer Science+Business Media B.V., 2011 Corona, quiet nationallicence Magnetic fields, corona nationallicence Tomography nationallicence Differential emission measure nationallicence EUV imaging nationallicence STEREO mission nationallicence Vásquez Alberto Instituto de Astronomía y Física del Espacio (CONICET-UBA) and FCEN (UBA), CC 67 - Suc 28, Ciudad de Buenos Aires, Argentina aut Huang Zhenguang Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut Manchester IV Ward Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut Frazin Richard Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut Solar Physics Springer Netherlands 274/1-2(2011-12-01), 259-284 0038-0938 274:1-2<259 2011 274 11207 https://doi.org/10.1007/s11207-010-9706-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9706-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vásquez Alberto Instituto de Astronomía y Física del Espacio (CONICET-UBA) and FCEN (UBA), CC 67 - Suc 28, Ciudad de Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Huang Zhenguang Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Manchester IV Ward Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Frazin Richard Dept. of Atmospheric, Oceanic and Space Sciences, University of Michigan, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 274/1-2(2011-12-01), 259-284 0038-0938 274:1-2<259 2011 274 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer