Nicolas Martin
nfmartin1980.bsky.social
Nicolas Martin
@nfmartin1980.bsky.social
470 followers 170 following 29 posts
Astronomer, CNRS/INSU researcher at Strasbourg Observatory. Local Group inhabitant.
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Quelle chance de pouvoir présenter ses travaux de recherche sur le dôme du planétarium ! Et de pouvoir le faire avec Claire Guillaume, doctorante à l’ @obsstrasbourg.bsky.social 😀
Dernières préparations avant le spectacle de ce soir, organisé avec le @cnrs.fr et le Jardin des Sciences de l’ @unistra.fr au Planétarium de Strasbourg. “L’archéologie Galactique avec les courants stellaires.” Salle comble !
Reposted by Nicolas Martin
Reposted by Nicolas Martin
Happy to announce that the line-detector.oca.eu website is now online!
It allows the user to select the stellar type, [M/H], λ- range, and resolving power and the page returns:
-purity of the line and minimum S/N required to detect it.
-interactive plot to identify the lines in the spectra
Reposted by Nicolas Martin
[Atelier philo-sciences] "Temps des humains, temps des étoiles", #Médiathèque de #Cronenbourg, mercredi 23/04. Avec Nicolas Martin, astrophysicien à @obsstrasbourg.bsky.social , la philosophe Élise Tourte et la facilitatrice graphique Violaine Leroy. Retour en images.
@agencerecherche.bsky.social
This review was an absolute joy to write. Thank you Amandine and @runningastronomer.bsky.social ! :)
Reposted by Nicolas Martin
The ESA #Gaia mission has delivered the best Milky Way maps to date and taken its last starlight before spacecraft retirement 🔭

www.esa.int/Science_Expl...
En effet, c’est @nicomartinfc.bsky.social dont Fragile/s sort en cette rentrée. 😉
Reposted by Nicolas Martin
Hello there! Are you on the job market? Do you love astrophysics? Then how about applying for one of our 3 open Research Fellow positions at the University of Surrey? One of them is with me! Find and study dwarf galaxies with Michelle! 🔭🧪 jobs.surrey.ac.uk/Vacancy.aspx...
Very happy to be visiting the Royal Observatory of Edinburgh today and giving a talk about the low-metallicity Milky Way this afternoon. And Scottish weather didn’t disappoint this morning!
👋
Some root to the name + RA + Dec is a very sensible way to name things! I’ll stand by it! Now, sure, if the mask making code truncates that to root + RA degrees and the field is a few arcmin on the side, yeah, that’s… a problem… 😰
Reposted by Nicolas Martin
Very happy to share my new paper on arxiv: arxiv.org/abs/2309.06137 releasing a catalogue of spectroscopic metallicities of VMP stars using the amazing Gaia DR3 RVS spectra. Did you know that there exists a lot of archival VMP spectra out there with no published parameters?
Gaia's brightest very metal-poor (VMP) stars: A metallicity...
Context. Gaia DR3 has offered the scientific community a remarkable dataset of approximately one million spectra acquired with the Radial Velocity Spectrometer (RVS) in the Calcium II triplet...
arxiv.org
Still looks better than my “metal-poo star” in a recent draft… 🤣
Reposted by Nicolas Martin
Very proud of this work, a huge collaborative effort from the Pristine team! It's great to finally see it out in the wild 🥳🤩🔭
The 23rd paper of the main series of papers from the Pristine survey is out! It's been a lot of work by a lot of people since Gaia's Data Release 3 came out. It's also the first Data Release from the survey and we publish catalogues for ~30+ million stellar metallicities.
And If course I’m very numb so I forgot to link to the actual paper 🙄. Here it is: https://arxiv.org/abs/2308.01344