MMScience March 2014

mmscience@solar.physics.montana.edu

4 participants
13 discussions

New HMI Nugget #5 "Comparison of sunspot properties in cycle 24 and 23"
by aimee norton 03 Mar '14

03 Mar '14

New HMI Science Nuggets are available at http://hmi.stanford.edu/hminuggetsfeaturing #5 "Comparison of sunspot properties in cycle 24 and 23" contributed by Reza Rezaei We analyze umbral area, magnetic field, and umbral intensity of the sunspots during the rising phase of cycle 24. We do not find a significant variation in either sunspot physical properties or distribution of sunspot umbral area from previous cycles. We invite those who use HMI data for their research, or whose research is closely related to HMI science objectives, to contribute to the HMI science nuggets. -- SDO/HMI team >

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New HMI Science Nugget #6 "Fickle Fields: Are Transient Magnetic Reversals Real?"
by aimee norton 03 Mar '14

03 Mar '14

New HMI Science Nuggets are available at http://hmi.stanford.edu/hminuggets, featuring the following topic #6 "Fickle Fields: Are Transient Magnetic Reversals Real?" contributed by Brian Harker We present observations from SDO/HMI of a magnetic transient observed in NOAA 11429 during the M7.9 flare on 13 March 2012. The observed transient showed an impulsive rotation of the field vector in response to the white-light flare. _________ We invite those who use HMI data for their research, or whose research is closely related to HMI science objectives, to contribute to the HMI science nuggets. -- SDO/HMI team

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New HMI Nugget #7 "Measuring the Solar Radius during the Venus Transit"
by aimee norton 03 Mar '14

03 Mar '14

New HMI Science Nuggets are available at http://hmi.stanford.edu/hminuggets, featuring the following topic #7 "Measuring the Solar Radius with HMI during the Venus Transit of 2012" contributed by Sebastien Couvidat The Venus transit of 2012 allowed us to measure the solar radius around 6173Å with HMI: we obtained a value of 959.58″ at 1 AU, with a systematic uncertainty larger than 0.27″. We invite those who use HMI data for their research, or whose research is closely related to HMI science objectives, to contribute to the HMI science nuggets. -- SDO/HMI team

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MMScience March 2014