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Galactic Panspermia
Idan Ginsburg, Manasvi Lingam, Abraham Loeb
We present an analytic model to estimate the total number of rocky or icy objects that could be captured by planetary systems within the Milky Way galaxy and result in panspermia s…
Could Solar Radiation Pressure Explain 'Oumuamua's Peculiar Acceleration?
Shmuel Bialy, Abraham Loeb
`Oumuamua (1I/2017 U1) is the first object of interstellar origin observed in the Solar System. Recently, \citet{Micheli2018} reported that `Oumuamua showed deviations from a Keple…
Identifying Interstellar Objects Trapped in the Solar System through Their Orbital Parameters
Amir Siraj, Abraham Loeb
The first interstellar object, `Oumuamua, was discovered in the Solar System by Pan-STARRS in 2017, allowing for a calibration of the abundance of interstellar objects of its size…
Physical constraints for the evolution of life on exoplanets
Manasvi Lingam, Abraham Loeb
Recently, many Earth-sized planets have been discovered around stars other than the Sun that might possess appropriate conditions for life. The development of theoretical methods f…
Dependence of Biological Activity on the Surface Water Fraction of Planets
Manasvi Lingam, Abraham Loeb
One of the unique features associated with the Earth is that the fraction of its surface covered by land is comparable to that spanned by its oceans and other water bodies. Here, w…
A dynamical origin for planets in triple star systems
Giacomo Fragione, Abraham Loeb, Idan Ginsburg
Recent radial velocity and transit data discovered planets in binary or triple stellar systems out of the entire population of a few thousand known planets. Stellar comp…