Category Archives: Stellar Science

Stellar Activity in the Near-Infrared: We Need a New Ruler!

Introduction We talk about stellar activity a lot on this blog.  Once HPF gets on sky, radial velocity noise from stellar activity will likely be the biggest impediment to finding exoplanets.  Thus, if we want HPF’s chief scientific mission of … Continue reading

Posted in Exoplanet Science, HPF Science, Stellar Science | Leave a comment

The Color of Sunspots: Studying Solar Activity

In this blog, we have highlighted how stellar activity can hinder and even masquerade as planetary signals (see Gliese 581 and Gliese 667C). The stars discussed in those posts were important, not only because they may harbor habitable zone planets, … Continue reading

Posted in HPF Science, Stellar Science | 1 Comment

More on stellar activity: an investigation of Gliese 667C

A few posts back, we explored how even with a highly precise planet-hunting instrument such as HPF, radial velocity noise from magnetic activity on our target stars may hinder our ability to detect exoplanet signals.  In that post, we used … Continue reading

Posted in Exoplanet Science, HPF Science, Stellar Science | 5 Comments