247 citations · 1.3k across the 49 of their papers we have counts for
49 papers
Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b
René Heller, Michael Hippke
There are more than 200 moons in our Solar System, but their relatively small radii make similarly sized extrasolar moons very hard to detect with current instruments. The best exo…
Pandora: A fast open-source exomoon transit detection algorithm
Michael Hippke, René Heller
We present Pandora, a new software to model, detect, and characterize transits of extrasolar planets with moons in stellar photometric time series. Pandora uses an analytical descr…
Signal preservation of exomoon transits during light curve folding
René Heller, Michael Hippke
In the search for moons around extrasolar planets, astronomers are confronted with a stunning observation. Although 3400 of the 4500 exoplanets were discovered with the transit met…
Interstellar communication network. III. Locating deep space nodes
Michael Hippke
An interstellar communication network benefits from relay nodes placed in the gravitational lenses of stars. The signal gains are of order with optimal alignment, allowing…
Searching for interstellar quantum communications
Michael Hippke
The modern search for extraterrestrial intelligence (SETI) began with the seminal publications of Cocconi & Morrison (1959) and Schwartz & Townes (1961), who proposed to search for…
Searching for a message in the angular power spectrum of the cosmic microwave background
Michael Hippke
The Creator of the universe could place a message on the most cosmic of all billboards, the Cosmic Microwave Background (CMB) sky. It was proposed by Hsu & Zee (2006) to to search…
Interstellar communication network. II. Deep space nodes with gravitational lensing
Michael Hippke
Data rates in an interstellar communication network suffer from the inverse square law due to the vast distances between the stars. To achieve high (Gbits/s) data rates, some combi…
Low-cost precursor of an interstellar mission
René Heller, Guillem Anglada-Escudé, Michael Hippke +1
The solar photon pressure provides a viable source of thrust for spacecraft in the solar system. Theoretically it could also enable interstellar missions, but an extremely small ma…
Transit least-squares survey -- III. A transit candidate in the habitable zone of Kepler-160 and a nontransiting planet characterized by transit-timing variations
René Heller, Michael Hippke, Jantje Freudenthal +3
The Sun-like star Kepler-160 (KOI-456) has been known to host two transiting planets, Kepler-160 b and c, of which planet c shows substantial transit-timing variations (TTVs). We u…
Interstellar communication network. I. Overview and assumptions
Michael Hippke
It has recently been suggested in this journal by Benford (2019) that "Lurkers" in the form of interstellar exploration probes could be present in the solar system. Similarly, extr…
Wotan: Comprehensive time-series de-trending in Python
Michael Hippke, Trevor J. David, Gijs D. Mulders +1
The detection of transiting exoplanets in time-series photometry requires the removal or modeling of instrumental and stellar noise. While instrumental systematics can be reduced u…
Transit least-squares survey -- II. Discovery and validation of 17 new sub- to super-Earth-sized planets in multi-planet systems from K2
René Heller, Michael Hippke, Kai Rodenbeck
The extended Kepler mission (K2) has revealed more than 500 transiting planets in roughly 500,000 stellar light curves. All of these were found either with the box least-squares al…
Transit Least Squares: Optimized transit detection algorithm to search for periodic transits of small planets
Michael Hippke, René Heller
We present a new method to detect planetary transits from time-series photometry, the Transit Least Squares (TLS) algorithm. TLS searches for transit-like features while taking the…
The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic
Hugh P. Osborn, Matthew Kenworthy, Joseph E. Rodriguez +71
PDS 110 is a young disk-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an ob…
Periodic Spectral Modulations Arise from Non-random Spacing of Spectral Absorption Lines
Michael Hippke
In recent publications, Borra (2013); Borra & Trottier (2016); Borra (2017) claimed the discovery of ultra-short (s) optical pulses originating from stars and galaxies,…
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…
Interstellar communication. VI. Searching X-ray spectra for narrowband communication
Michael Hippke, Duncan H. Forgan
We have previously argued that targeted interstellar communication has a physical optimum at narrowband X-ray wavelengths nm, limited by the surface roughness of focus…