2021-01-27

the 16th birthday of this blog

Today is the 16th birthday of this blog! Yes, this blog has been going for 16 years, and if I trust my platform, this post will be post number 3753. I had a great research day today. In Stars & Exoplanets meeting Rodrigo Luger (Flatiron) showed his nice information-theoretic results on what you can learn from stellar light curves about stellar surfaces, and Sam Grunblatt (AMNH) showed some planets that have—or should have—changing orbital periods as they inspiral into their host stars. I asked Grunblatt about the resonances that might be there, like the ones I just learned about in Saturn's rings: Are planet inspirals sensitive to asteroseismic resonances?

Before and after this meeting, Adrian Price-Whelan (Flatiron) and I continued working on measuring radial-velocities in SDSS-IV APOGEE sub-exposures. We find so many weird effects we are confused! We find sub-hour velocity trends but they seem to have the wrong slopes (accelerations) given what we know about the targets. It might have to do with badly masked bad pixels in the spectra...

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