Author Archives: Paul M Robertson

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 Plot Thickens: Habitable-Zone Exoplanets around Proxima Centauri and TRAPPIST-1

Introduction As the time approaches to commission HPF on the Hobby-Eberly Telescope, we are learning that the spectrograph will be coming online in truly exciting times for exoplanet science!  The detection of habitable-zone exoplanets around two nearby M dwarf stars—including … Continue reading

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The HPF cryostat test drive: sub-milliKelvin temperature stability

Background: the need to cool HPF down to 180K One of the most frequently discussed topics on this blog has been the need to enclose the HPF instrument in a stable, cold environment.  Because HPF will observe stars in infrared … Continue reading

Posted in HPF Hardware, Project Development | Leave a comment