Solar Physics seminar by Frederic Clette (ROB) on March 2, 14:30.
Title: New insights in the F10.7cm index and its relation with the sunspot number
Abstract:
Having to apply a proxy relation converting the sunspot number SN into an F10cm radio flux, I found a lot of inconsistencies in past F10.7 studies, which prompted me to undertake a deep study that reconsidered past assumptions and interpretations. Here, I will summarize the key results from a paper published in 2021. By revisiting the SN/F10.7 relation and starting entirely from the raw daily data, I managed to clarify three main aspects:
- the mechanism behind the apparent non-linearity found in previous publications
- pinpointing the elusive F10.7cm all-quiet background flux and showing how its value is influenced by timescale
- the identification of a 10% scale jump in the F10.7cm series in 1981, just when it went through the only major transition in its production.
Where: Meridian room at ROB or Webex: https://observatory.webex.com/observatory/j.php?MTID=mfd700cecc5fdfdda3b15e51c4abeb90c
