Science

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Et qui n'est pas adapté!

• Boite noire
• Problème de riplicabilité

• Source

Note

Inserer diagrame de la methode scientifique

Introduction

My name is Vincent Deguin, Astrophysics PhD student at the Open University. I am passionate about my scientific topic, outreach and education, as well as an aspiring web developer. The image on the right is the edge of a nearby, young, star-forming region called NGC 3324 in the Carina Nebula, pictured by the recently launched James Webb Space Telescope (JWST). This brand new Infrared space telescope will bring exciting times for astronomers like me, but also for you, provided that scientific discoveries are shared in an accessible format (cf Manifesto). Fortunately, I have an insatiable appetite for Open Science and this web-site is an attempt to make the outputs of my scientific journey as open, accesible and reproducible as possible, as well as providing a plateform for self minded researcher to contribute in the production of a research compendium, in an Encyclopaedia style.

Fig. 1 James Web Space Telescope JWST

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My niche

I am a laboratory astrophysicists studying the icy mantle coating interstellar dust grains.

Fig. 2 [Source](to find)

My Scientific Interests

Interstellar Dust Grains

» Interstellar ?

Not the the movie, but actually the medium we find between the stars

Hover the figure to switch between images - Image 1 Gaia image of the Galactic plane - Image 2 Molecular cloud mapping

Hopefully you have had the chance to see the galaxie in your lifetime... Now focus on the dark feature:

Molecular Clouds

This a typical and vary famous interstellar environment, the Pillars of Creation.

• Molecular Cloud

Pillars of creation

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Tutorials

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Astronomy 101

The ISM

» Dust Grains

Formation

Solar Winds

Stellar Atmosphere

Fig. 3 Source

Supernovae

Fig. 4 Source

Evolution

Note

Dust grain evolve throughout the ISM and play an important role …

Fig. 5 .jpg :name: Dust cycle in Galaxy Source

Role

Astrochemistry

link note.A

Planet formation

link note.B

Ices in Space

In space, ice is not a crystal like here on earth, but an amorphous material with very distinct properties. It is present in many environments:

Fig. 6 Interstellar Dust Grain. Source

Want to know more ?

• Astronomy 101
• Interstellar Medium
• Interstellar Dust Grains
• Astrochemistry

» Covering Interstellar Dusts

Dust is ubiquitus in space. They are produced by Stars as sub-µm grains made of either carbon or silicate and are subsequently dispersed by the solar winds in the ISM. In the high vacuum of space, they provide a surface for atoms and small molecules to stick and react, and are hence the main catalyst of chemical reactions in the Universe. When the dust is embeded within Molecular Clouds (Fig. 1), they are protected from radiation and an icy layer can form around the dust grain. Molecular Clouds are the birth place of Stars, and all those tiny µm interstellar dust grains (and gas) contained within the cloud will be the building blocks of all the solar system bodies.

Interesting subject to study, don’t you think ?

Note: Fig. 6 is actually not an interstellar dust grain but an interplanetary grain (easier to catch - with the Stardust mission)

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Fig. 7 Protoplanetary Disk image taken with ALMA (DSHARP project) Source

Want to know more ?

• Star formation
• Planet formation I
• Planet formation II
• JWST

» In Protoplanetary Disks

Star formation is a complicated process that is not yet perfectly understood. They are the result of the gravitational collapse of a dense part of a molecular cloud (referred as clump). Protoplanetary Disks are a byproduct of star formation. They contain both Dust and Gas (ratio of 1:99) and in a time scale of a few million years will result in a solar system like our own…

• substructure
• snowline: thought to promote planet formation …
• Include video on hover of PPD with text explaining that we find our dust grain there

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Fig. 8 Comet 67P Churyumov-Gerasimenko Source

Want to know more ?

• Astronomy 101

» Within Comets & Icy Moons

Where ice is present today in the solar system

Comets are pristine solar system bodies that can give us information about the processes at play during the earliest stages of planet formation.

Enceladus, Jupyter Moon … Water, life tout ca tout ca …

Observations, Experiments & Modelling

No astronomical questions is solved without the interplay of those three disciplines

» Observations

JWST

Fig. 9 JWST

Want to know more ?

• Astronomy 101
• JWST

The James Webb Space Telescope is a revolution for Astronomers. It will give new insights about …

» Amorphous ice experiments

My Expertise

This is my confort zone (almost)

Vapor deposited

Hyperquenched

» Water Ice Models

Astrochemistry vs Geochemistry

Most of the chemistry in space occurs within the ice mantle covering interstellar dust.

» Molecules in space

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• Insert table of molecules, links to molecular zoo
• Insert Ross picture of a meteroite

» Cosmochemistry

The Ariane Thread for Planet Formation

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Bridging the gap

• Deuterium fractionation

Science questions

From those topics, there is an incredible sets of science questions arising, where Scientists from multiple disciplines have to make a joint effort:

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• insert here a list of the scientific questions relevant to the above fields

This lead me to the last of my scientific intrerest

Tools for Open Science

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• link to the help section

Comments

Notes

Trello Card

Page

• Author: Vincent Deguin;

• Status: 🔎

• Reviewed: ❌

• Updated: 28/05/2023

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