caa a22 4500 445347139 CHVBK 20180317142832.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11207-011-9846-y doi (NATIONALLICENCE)springer-10.1007/s11207-011-9846-y Properties of Granules in Upflows and Downflows [Elektronische Daten] [Daren Yu, Zongxia Xie, Qinghua Hu, Shuhong Yang, Chunlan Jin] Normal-mode observations of seven quiet regions, obtained by the Hinode spacecraft, are used to analyze the physical properties of granules with mean upward and downward Doppler velocity. We identify 75 146 granules from the observations with a granule-detection method. Then the granules are divided into two subsets: one with negative mean Doppler velocity (granule-upflows), and the other with positive mean Doppler velocity (granule-downflows). Next, the statistical properties and distributions of these two subsets of granules are measured and discussed. We also study the relation between the Doppler velocity of granules and other properties. Several conclusions are drawn from the statistical analysis: i) The majority (73.5%) of granules have negative mean Doppler velocity (blueshift). ii) The continuum-intensity distribution of granule-upflows reaches a peak at 1.05, while that of granules-downflows reaches a peak at 0.99. iii) Granule-upflows are greater than granule-downflows if transverse, absolute longitudinal and unsigned flux density are smaller than 100 G, while granule-upflows are less than granule-downflows if the flux densities are greater than 100 G. iv) Granule-downflows are - on average - slightly smaller and fainter than granule-upflows. Also, the flux densities of granule-downflows are slightly higher. v)The mean Doppler velocity within intergranular lanes is the most highly correlated with that within granules among the eight properties of granules. Springer Science+Business Media B.V., 2011 Granulation nationallicence Magnetic fields nationallicence Photosphere nationallicence Yu Daren Harbin Institute of Technology, 150001, Harbin, China aut Xie Zongxia Harbin Institute of Technology, 150001, Harbin, China aut Hu Qinghua Harbin Institute of Technology, 150001, Harbin, China aut Yang Shuhong Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China aut Jin Chunlan Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China aut Solar Physics Springer Netherlands 273/1(2011-10-01), 1-13 0038-0938 273:1<1 2011 273 11207 https://doi.org/10.1007/s11207-011-9846-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9846-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yu Daren Harbin Institute of Technology, 150001, Harbin, China aut NATIONALLICENCE 700 1- Xie Zongxia Harbin Institute of Technology, 150001, Harbin, China aut NATIONALLICENCE 700 1- Hu Qinghua Harbin Institute of Technology, 150001, Harbin, China aut NATIONALLICENCE 700 1- Yang Shuhong Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China aut NATIONALLICENCE 700 1- Jin Chunlan Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, 100012, Beijing, China aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 273/1(2011-10-01), 1-13 0038-0938 273:1<1 2011 273 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer