247 citations · 1.3k across the 49 of their papers we have counts for
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The spectral Petersen diagram as a new tool to map pulsation modes in variable stars
Michael Hippke
Additional pulsation modes have been discovered in many Cepheids, RR Lyrae, and other variable stars. Fourier transforms are used to find, fit and subtract the main pulsation perio…
Revisiting the exomoon candidate signal around Kepler-1625b
Kai Rodenbeck, René Heller, Michael Hippke +1
Transit photometry of the exoplanet candidate Kepler-1625b has recently been interpreted to show hints of a moon. We aim to clarify whether the exomoon-like signal is really caused…
Spaceflight from Super-Earths is difficult
Michael Hippke
Many rocky exoplanets are heavier and larger than the Earth, and have higher surface gravity. This makes space-flight on these worlds very challenging, because the required fuel ma…
Interstellar communication. XI. Short pulse duration limits of optical SETI
Michael Hippke
Previous and ongoing searches for extraterrestrial optical and infrared nanosecond laser pulses and narrow line-width continuous emissions have so far returned null results. At the…
Interstellar communication. X. The colors of optical SETI
Michael Hippke
It has recently been argued from a laser engineering point of view that there are only a few magic colors for optical SETI. These are primarily the Nd:YAG line at 1064 nm and its s…
Super-Earths in need for Extremly Big Rockets
Michael Hippke
Many rocky exoplanets are heavier and larger than Earth, so-called "Super-Earths". Some of these may be habitable, and a few may be inhabited by Super-Earthlings. Due to the higher…
Interstellar communication. IX. Message decontamination is impossible
Michael Hippke, John G. Learned
A complex message from space may require the use of computers to display, analyze and understand. Such a message cannot be decontaminated with certainty, and technical risks remain…
Interstellar Communication. VIII. Hard limits on the number of bits per photon
Michael Hippke
A photon can encode several bits of information based on an alphabet of its time of arrival, energy, and polarization. Heisenberg's uncertainty principle places a limit on measurin…