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A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system

Journal Article

Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R_⊕) range from low-density sub-Neptunes containing volatile elements¹ to higher-density rocky planets with Earth-like² or iron-rich³ (Mercury-like)...

A role for cyanide in recipe for life

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Harvard research explores ‘RNA world’

Visible-Spanning Flat Supercontinuum for Astronomical Applications

Journal Article

We demonstrate a broad, flat, visible supercontinuum spectrum that is generated by a dispersion-engineered tapered photonic crystal fiber pumped by a 1 GHz repetition rate turn-key Ti:sapphire laser outputting ~30 fs pulses at 800 nm. At a pulse energy...

Photochemical reductive homologation of hydrogen cyanide using sulfite and ferrocyanide

Journal Article

Photoredox cycling during UV irradiation of ferrocyanide in the presence of stoichiometric sulfite is shown to be an extremely effective way to drive the reductive homologation of hydrogen cyanide (HCN) to simple sugars and precursors of hydroxy acids and...

Gaia Mission Helps Improve Classification Scheme for Exoplanet Sizes

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https://scitechdaily.com/gaia-mission-helps-improve-classification-sche…

Solvated-electron production by cyanocuprates is compatible with the UV-environment on the Haden-Archaean Earth

Journal Article

UV-driven photoredox processing of cyanocuprates can generate simple sugars necessary for prebiotic synthesis. We investigate the wavelength dependence of this process from 215 to 295 nm and generally observe faster rates at shorter wavelengths. The most...

S. Furkan Ozturk

Person

Furkan completed his undergraduate degree in physics at Bilkent University in Ankara, Turkiye. During his time there, he focused on studying the theory of ultracold dipolar Bose-Einstein condensates using the Hartree-Fock Bogoliubov method. Later, in 2018...

TESS Discovery of a Transiting Super-Earth in the pi Mensae System

Journal Article

We report the detection of a transiting planet around π Men (HD 39091), using data from the Transiting Exoplanet Survey Satellite (TESS). The solar-type host star is unusually bright (V = 5.7) and was already known to host a Jovian planet on a highly...

K2-263 b: a 50 d period sub-Neptune with a mass measurement using HARPS-N

Journal Article

This paper reports on the validation and mass measurement of K2-263 b, a sub-Neptune orbiting a quiet G9V star. Using K2 data from campaigns C5 and C16, we find this planet to have a period of 50.818947 ± 0.000094 d and a radius of 2.41 ± 0.12 R_⊕. We...

A New Desalination Pump Help Define the pH of Ocean Worlds

Journal Article

We study ocean exoplanets, for which the global surface ocean is separated from the rocky interior by a high-pressure ice mantle. We describe a mechanism that can pump salts out of the ocean, resulting in oceans of very low salinity. Here we focus on the...

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Selective prebiotic conversion of pyrimidine and purine anhydronucleosides into Watson-Crick base-pairing arabino-furanosyl nucleosides in water

Journal Article

Prebiotic nucleotide synthesis is crucial to understanding the origins of life on Earth. There are numerous candidates for life’s first nucleic acid, however, currently no prebiotic method to selectively and concurrently synthesise the canonical Watson...