398 citations · 3.9k across the 69 of their papers we have counts for
52 papers · 1 filter
Identifying the Potential Biosphere of Mars
Eriita G. Jones, Charles H. Lineweaver
Our current knowledge of life on Earth indicates a basic requirement for liquid water. The locations of present liquid water are therefore the logical sites to search for current l…
A comprehensive comparison of the Sun to other stars: searching for self-selection effects
Jose A. Robles, Charles H. Lineweaver, Daniel Grether +5
If the origin of life and the evolution of observers on a planet is favoured by atypical properties of a planet's host star, we would expect our Sun to be atypical with respect to…
Dark-Energy Dynamics Required to Solve the Cosmic Coincidence
Chas A. Egan, Charles H. Lineweaver
Dynamic dark energy (DDE) models are often designed to solve the cosmic coincidence (why, just now, is the dark energy density , the same order of magnitude as the matter d…
The Cosmic Coincidence as a Temporal Selection Effect Produced by the Age Distribution of Terrestrial Planets in the Universe
Charles H. Lineweaver, Chas A. Egan
The energy densities of matter and the vacuum are currently observed to be of the same order of magnitude: . The cosmological windo…
The Metallicity of Stars with Close Companions
Daniel Grether, Charles H. Lineweaver
We examine the relationship between the frequency of close companions (stellar and planetary companions with orbital periods < 5 years) and the metallicity of their Sun-like (~ FGK…
A search for water masers toward extrasolar planets
V. Minier, C. Lineweaver
Water is the most common triatomic molecule in the universe and the basis of life on Earth. Astrophysical masers have been widely studied in recent years and have been shown to be…
How Dry is the Brown Dwarf Desert?: Quantifying the Relative Number of Planets, Brown Dwarfs and Stellar Companions around Nearby Sun-like Stars
Daniel Grether, Charles H. Lineweaver
Sun-like stars have stellar, brown dwarf and planetary companions. To help constrain their formation and migration scenarios, we analyse the close companions (orbital period < 5 ye…
The Galactic Habitable Zone and the Age Distribution of Complex Life in the Milky Way
Charles H. Lineweaver, Yeshe Fenner, Brad K. Gibson
We modeled the evolution of the Milky Way to trace the distribution in space and time of four prerequisites for complex life: the presence of a host star, enough heavy elements to…
Testing the CMB Data for Systematic Effects
Louise M. Griffiths, Charles H. Lineweaver
Under the assumption that the concordance Lambda-cold dark matter (CDM) model is the correct model, we test the cosmic microwave background (CMB) anisotropy data for systematic eff…
Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe
Tamara M. Davis, Charles H. Lineweaver
We use standard general relativity to illustrate and clarify several common misconceptions about the expansion of the Universe. To show the abundance of these misconceptions we cit…
What Fraction of Sun-like Stars have Planets?
Charles H. Lineweaver, Daniel Grether
The radial velocities of ~1800 nearby Sun-like stars are currently being monitored by eight high-sensitivity Doppler exoplanet surveys. Approximately 90 of these stars have been fo…
Is the Pre-WMAP CMB Data Self-consistent?
Charles H. Lineweaver, Louise M. Griffiths
Although individual observational groups vigorously test their data sets for systematic errors, the pre-WMAP CMB observational data set has not yet been collectively tested. Under…
Cosmic Thermobiology: Thermal Constraints on the Origin and Evolution of Life in the Universe
Charles H. Lineweaver, David Schwartzman
We review the thermal history of the Universe. We obtain a new estimate for the thermal history of the Earth over the past four billion years using a biological thermometer based o…
Inflation and the Cosmic Microwave Background
Charles H. Lineweaver
I present a pedagogical review of inflation and the cosmic microwave background. I describe how a short period of accelerated expansion can replace the special initial conditions o…
On the Non-observability of Recent Biogenesis
Charles H. Lineweaver, Tamara M. Davis
In a previous paper we addressed the question "Does the Rapid Appearance of Life on Earth Suggest that Life is Common in the Universe?" The non-observability of recent biogenesis i…
Testing the CMB Data for Systematic Effects
Louise M. Griffiths, Charles H. Lineweaver
Under the assumption that the concordance Lambda cold dark matter (CDM) model is the correct model, we test the cosmic microwave background (CMB) anisotropy data for systematic eff…
An Automated Search for Extrasolar Planet Transits
M. G. Hidas, J. K. Webb, M. C. B. Ashley +3
We are setting up a new search for transiting extrasolar planets using the 0.5m Automated Patrol Telescope at Siding Spring Observatory, Australia. We will begin regular observatio…
What can rapid terrestrial biogenesis tell us about life in the universe?
Charles H. Lineweaver, Tamara M. Davis
It is sometimes asserted that the rapidity of biogenesis on Earth suggests that life is common in the Universe. We critically examine the assumptions inherent in this argument. Usi…
How common are Earths? How common are Jupiters?
Charles H. Lineweaver, Daniel Grether, Marton Hidas
Among the billions of planetary systems that fill the Universe, we would like to know how ours fits in. Exoplanet data can already be used to address the question: How common are J…
What can exoplanets tell us about our Solar System?
Charles H. Lineweaver, Daniel Grether, Marton Hidas
We update our analysis of recent exoplanet data that gives us a partial answer to the question: How does our Solar System compare to the other planetary systems in the Universe? Ex…
Does the rapid appearance of life on Earth suggest that life is common in the Universe?
Charles H. Lineweaver, Tamara M. Davis
It is sometimes assumed that the rapidity of biogenesis on Earth suggests that life is common in the Universe. Here we critically examine the assumptions inherent in this if-life-e…
The Observational Case for Jupiter Being a Typical Massive Planet
Charles H. Lineweaver, Daniel Grether
We identify a subsample of the recently detected extrasolar planets that is minimally affected by the selection effects of the Doppler detection method. With a simple analysis we q…
Cosmological Parameters
Charles H. Lineweaver
This article briefly summarizes the increasingly precise observational estimates of the cosmological parameters. After three years on the stump, the Lambda-CDM model is still the l…
Solutions to the tethered galaxy problem in an expanding universe and the observation of receding blueshifted objects
Tamara M. Davis, Charles H. Lineweaver, John K. Webb
We use the dynamics of a galaxy, set up initially at a constant proper distance from an observer, to derive and illustrate two counter-intuitive general relativistic results. Altho…