V. Vuitton
YOU?
Author Swipe
View article: Prebiotic Chemistry on Water-rich Exoplanets: Optical Constants and Detectability of Hydrolyzed Hazes
Prebiotic Chemistry on Water-rich Exoplanets: Optical Constants and Detectability of Hydrolyzed Hazes Open
Observations of temperate sub-Neptunes suggest active chemical environments, finding evidence of both water vapor and photochemical hazes in their atmospheres. Hazes formed in water-rich atmospheres are chemically complex, containing mole…
View article: Using SOFIA’s EXES to Search for C <sub>6</sub> H <sub>2</sub> and C <sub>4</sub> N <sub>2</sub> in Titan’s Atmosphere
Using SOFIA’s EXES to Search for C <sub>6</sub> H <sub>2</sub> and C <sub>4</sub> N <sub>2</sub> in Titan’s Atmosphere Open
In Titan’s atmosphere, the chemistry of simple hydrocarbons (e.g., CH 4 and C 2 H 2 ) and nitrogen bearing species (e.g., N 2 and CN) represents an important link between molecular species and the ubiquitous organic haze that gives Titan i…
View article: Ion induced formation of complex organic nitrogen molecules in solid-phase adenine
Ion induced formation of complex organic nitrogen molecules in solid-phase adenine Open
International audience
View article: Using SOFIA's EXES to search for C$_6$H$_2$ and C$_4$N$_2$ in Titan's atmosphere
Using SOFIA's EXES to search for C$_6$H$_2$ and C$_4$N$_2$ in Titan's atmosphere Open
In Titan's atmosphere, the chemistry of small hydrocarbons and nitriles represent an important link from molecular species to the ubiquitous organic haze that gives Titan its characteristic yellow color. Here we present a new search for tw…
View article: The Impact of Organic Hazes and Graphite on the Observation of CO<sub>2</sub>-rich Sub-Neptune Atmospheres
The Impact of Organic Hazes and Graphite on the Observation of CO<sub>2</sub>-rich Sub-Neptune Atmospheres Open
Many sub-Neptune and super-Earth exoplanets are expected to develop metal-enriched atmospheres due to atmospheric loss processes such as photoevaporation or core-powered mass loss. Thermochemical equilibrium calculations predict that at hi…
View article: Formation of Organic Hazes in CO<sub>2</sub>-rich Sub-Neptune Atmospheres within the Graphite Stability Regime
Formation of Organic Hazes in CO<sub>2</sub>-rich Sub-Neptune Atmospheres within the Graphite Stability Regime Open
Super-Earths and sub-Neptunes are the most common exoplanets, with a “radius valley” suggesting that super-Earths may form by shedding sub-Neptunes’ gaseous envelopes. Exoplanets that lie closer to the super-Earth side of the valley are mo…
View article: The impact of organic hazes and graphite on the observation of CO2-rich sub-Neptune atmospheres
The impact of organic hazes and graphite on the observation of CO2-rich sub-Neptune atmospheres Open
Many sub-Neptune and super-Earth exoplanets are expected to develop metal-enriched atmospheres due to atmospheric loss processes such as photoevaporation or core-powered mass loss. Thermochemical equilibrium calculations predict that at hi…
View article: Ion irradiation of adenine: Implications for molecular growth in Titan’s atmosphere
Ion irradiation of adenine: Implications for molecular growth in Titan’s atmosphere Open
The Cassini-Huygens mission revealed that energetic (1 – 1000 keV) water ions (OHx+, x = 0,1,2), originating from Enceladus' geysers, precipitate in Titan's upper atmosphere where molecules reaching a mass-to-charge (m/z) of several thousa…
View article: Isomer specific photochemistry in Titan’s atmosphere
Isomer specific photochemistry in Titan’s atmosphere Open
Titan’s atmosphere is an active organic laboratory instigated by the photolysis of its main components, N2 and CH4, and terminating with the formation of photochemical hazes (Hörst et al. 2017, Coustenis et al. 2021). Its complex chemical …
View article: Using SOFIA’s EXES to improve the upper limits for C6H2 and C4N2 in Titan’s atmosphere
Using SOFIA’s EXES to improve the upper limits for C6H2 and C4N2 in Titan’s atmosphere Open
IntroductionSaturn’s largest moon, Titan, has a dense atmosphere comprised mostly of nitrogen and methane. The photolysis and ionization of these major componentsleads to complex chemical reactions, which create substantial diversity among…
View article: Methyl Radical Detected on Titan with JWST/MIRI
Methyl Radical Detected on Titan with JWST/MIRI Open
Saturn’s largest moon Titan has a nitrogen-methane atmosphere and a rich organic photochemistry. Dissociation of Titan’s molecular methane and nitrogen into N and methyl (CH3) radicals forms the basis of this photochemistry and results in …
View article: Effects of Ultraviolet Radiation on Sub-Neptune Exoplanet Hazes through Laboratory Experiments
Effects of Ultraviolet Radiation on Sub-Neptune Exoplanet Hazes through Laboratory Experiments Open
Temperate sub-Neptune exoplanets could contain large inventories of water in various phases, such as water worlds with water-rich atmospheres or even oceans. Both space-based and ground-based observations have shown that many exoplanets li…
View article: Effects of Ultraviolet Radiation on Sub-Neptune Exoplanet Hazes Through Laboratory Experiments
Effects of Ultraviolet Radiation on Sub-Neptune Exoplanet Hazes Through Laboratory Experiments Open
Temperate sub-Neptune exoplanets could contain large inventories of water in various phases, such as water-worlds with water-rich atmospheres or even oceans. Both space-based and ground-based observations have shown that many exoplanets li…
View article: Improved Carbon and Nitrogen Isotopic Ratios for CH<sub>3</sub>CN in Titan’s Atmosphere Using ALMA
Improved Carbon and Nitrogen Isotopic Ratios for CH<sub>3</sub>CN in Titan’s Atmosphere Using ALMA Open
Titan, Saturn’s largest satellite, maintains an atmosphere composed primarily of nitrogen (N 2 ) and methane (CH 4 ) that leads to complex organic chemistry. Some of the nitriles (CN-bearing organics) on Titan are known to have substantial…
View article: Improved Carbon and Nitrogen Isotopic Ratios for CH3CN in Titan’s Atmosphere Using ALMA
Improved Carbon and Nitrogen Isotopic Ratios for CH3CN in Titan’s Atmosphere Using ALMA Open
Titan, Saturn's largest satellite, maintains an atmosphere composed primarily of nitrogen (N 2 ) and methane (CH 4 ) that creates complex chemistry. Within this complex chemistry exist nitrile (or cyanide) molecules that have a -CN group. …
View article: Ion induced formation of complex HCN-species in solid-phase adenine
Ion induced formation of complex HCN-species in solid-phase adenine Open
IntroductionThe pathways from simple organic molecules to prebiotics and complex life on Earth remain poorly understood. Adenine and other organic compounds involved in biochemistry have been detected in carbonaceous chondrites and laborat…
View article: Experimental investigation of the molecular composition of organic hazes in a water-rich exoplanet atmosphere
Experimental investigation of the molecular composition of organic hazes in a water-rich exoplanet atmosphere Open
Transmission spectra have suggested that condensate clouds and/ or photochemical haze are present in the atmospheres of many temperate to warm exoplanets [1]. Aerosols can affect atmospheric composition directly through condensation and he…
View article: Exploring the influence of chemical extraction on the complexity of the Soluble Organic Matter (SOM) in carbonaceous chondrites
Exploring the influence of chemical extraction on the complexity of the Soluble Organic Matter (SOM) in carbonaceous chondrites Open
The complexity and origin of organic matter in carbonaceous chondrites has been a topic of interest for over 60 years1. This organic matter has been studied through the bulk, the Insoluble Organic Matter (IOM) and the Soluble Organic Matte…
View article: Enantioselective three-dimensional high-performance liquid chromatographic determination of amino acids in the Hayabusa2 returned samples from the asteroid Ryugu
Enantioselective three-dimensional high-performance liquid chromatographic determination of amino acids in the Hayabusa2 returned samples from the asteroid Ryugu Open
The chirality of amino acids in extraterrestrial materials may provide an insight into the origin of the essential l-enantiopure amino acids in the terrestrial biosphere. In 2020, the Hayabusa2 mission succeeded in bringing back surface ma…
View article: Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium
Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium Open
Polycyclic aromatic hydrocarbons (PAHs) contain ≲20% of the carbon in the interstellar medium. They are potentially produced in circumstellar environments (at temperatures ≳1000 kelvin), by (~10 kelvin) interstellar clouds, or by processin…
View article: Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body
Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body Open
The sample from the near-Earth carbonaceous asteroid (162173) Ryugu is analyzed in the context of carbonaceous meteorites soluble organic matter. The analysis of soluble molecules of samples collected by the Hayabusa2 spacecraft shines lig…
View article: Measuring Isotopic Ratios in Titan's Atmospheric Nitriles
Measuring Isotopic Ratios in Titan's Atmospheric Nitriles Open
International audience
View article: Implications of the Cassini Grand Finale INMS measurements for atmospheric chemistry on Saturn (and vice versa)
Implications of the Cassini Grand Finale INMS measurements for atmospheric chemistry on Saturn (and vice versa) Open
International audience
View article: Molecular Screening with Liquid Chromatography Coupled to Ultra-High-Resolution Mass Spectrometry: Chromatographic Methods and Data Treatment for Application to Complex Organic Matter in Astrophysical Materials
Molecular Screening with Liquid Chromatography Coupled to Ultra-High-Resolution Mass Spectrometry: Chromatographic Methods and Data Treatment for Application to Complex Organic Matter in Astrophysical Materials Open
International audience