Category Archives: HPF Science

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

Gliese 581 and the Stellar Activity Problem

The primary science objective of HPF is to discover and confirm low-mass exoplanets in or near the habitable zones of nearby M dwarf stars.  The technical challenge of such an endeavor is significant; we must be able to measure sub … Continue reading

Posted in Exoplanet Science, HPF Science, Stellar Science | 16 Comments