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sagateam.bsky.social
SAGA Team
@sagateam.bsky.social
77 followers 52 following 92 posts
#SAGATeamCAMK 🔭🌟 Research group on Stellar Abundances and Galactic Archaeology. We explore the secrets of the #MilkyWay using stellar chemical abundances. #astronomy #astrophysics #research #science #stars https://linktr.ee/saga.team
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 10d
⚠️ "Krytyczna sytuacja finansowa CAMK PAN: Instytut naukowy płaci za błędy państwa sprzed dekad

www.camk.edu.pl/pl/archiwum/...

#Nauka #Polska
Reposted by SAGA Team
emily.space
Emily Hunt @emily.space · 12d
Oooh the Nobel Prize is out today, so it's time for my yearly round of ignoring that news and reading about many of the women who were snubbed of the prize in the past and who the Nobel Prize committee refuses to apologise for. 🧪🔭
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Reposted by SAGA Team
lcgordon.bsky.social
lindsey ✨ @lcgordon.bsky.social · 12d
how to win a nobel physics prize 🔭✨☄️
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 16d
The work was funded by a grant from the Polish National Science Centre (NCN) @ncn.gov.pl
sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 16d
🧑‍🤝‍🧑 We calibrated a similarity metric that can identify stars with parameters that differ by ± 200 K, ± 0.3 dex, and ± 0.2 dex in effective temperatures, surface gravities, and metallicities, respectively. We achieved completeness between 74-98 % and typical purity between 39-54 % in this selection
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 16d
⌨️ In this paper, we present a procedure for the identification of stars with similar atmospheric parameters, before any radiative transfer analysis is performed

We used projection maps created by the t-SNE dimensionality reduction algorithm applied directly to the spectra using pixels as dimensions
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 16d
♟️CHESS stands for the CHEmical Survey analysis System, a pipeline that aims to provide precise and accurate atmospheric parameters and abundances for large samples of FGK-type stars

⭐ For that, we use multiple instances of differential analysis done against samples of reference stars
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · 16d
🔭 New paper of the @sagateam.bsky.social accepted in A&A!

This is the first paper of the upcoming "Playing CHESS with stars" series!

The paper was lead by John Martínez Fernández and Sergen Özdemir, Ph.D. students at the SAGA Team

arxiv.org/abs/2509.19443

#stellarastro #SagaTeamCAMK
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Aug 14
The High-Resolution Multi-Object Spectrograph (HRMOS) has a new webpage:

www.hrmos.eu

HRMOS will be proposed as a new instrument for the Very Large Telescope of ESO as part of the VLT2030 roadmap

It will combine very high-resolution (80k), >50 multiplex, and high RV precision

#instrumentation 🔭
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Aug 7
Congrats to the CUBES consortium!
eso.org ESO @eso.org · Aug 7
It's a go for manufacturing CUBES, a future instrument for our VLT.

The VLT's ultraviolet eye, CUBES will search for water in the asteroid belt & explore the UV cosmic background, among other scientific goals.

https://www.eso.org/public/announcements/ann25006/

🔭 🧪
#instrumentation
A rendering of an astronomical observation instrument featuring various components and wires, with two blue metallic boxes visible on either side. Two human figures are included beside the instrument to convey its scale.
Reposted by SAGA Team
ebellm.bsky.social
Eric Bellm @ebellm.bsky.social · Jun 27
🔭 Friendly advice for astronomers in the US and Chile--if you are excited to access @vrubinobs.bsky.social Data Preview 1 on Monday, request your account *now*--it has to get approved by a human. For best results use your university single-sign on, if available.

rsp.lsst.io/guides/getti...
Getting an account on the RSP
Before getting started: Understand whether you have Rubin data rights.- Rubin data rights are required in order to hold an account in the Rubin Science Platform., All scientists and students affili...
rsp.lsst.io
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Reposted by SAGA Team
emily.space
Emily Hunt @emily.space · Jun 26
Finding out about Gaia at #EAS2025Cork! ☄️

Just announced: Gaia DR4 will be released in December 2026!
A photo of the slide with the December 2026 release date
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Reposted by SAGA Team
johndebes.bsky.social
John Debes @johndebes.bsky.social · Jun 25
Oh, and teaser: We have plans to release high level spectra like HASP but for each unique COS and STIS target ever observed by #Hubble since STIS started operating in 1997 🔭🧪
johndebes.bsky.social John Debes @johndebes.bsky.social · Jun 25
Like #Hubble spectra, but it's hard to access? My working group @stsci.edu launched the Hubble Advanced Spectral Products, joining COS and STIS spectra across different modes and instruments for every HST program for the first time 🧪🔭https://archive.stsci.edu/missions-and-data/hst/hasp (1/4)
The logo for the Hubble Advanced Spectral Products, or HASP. White lettering with a rainbow border below. To the right is a set of stylized spectra ranging from violet to red that are in the process of "hooking" together. A hasp is a latching mechanism, which is similar to what HASP does--link different gratings from HST spectroscopy together.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Jun 24
🇪🇺 Members of the #SAGATeamCAMK are involved in the working group responsible for the exoplanet, stellar, and Galactic science case. The WST project is funded by the European Union under Grant ID 101183153 awarded within the HORIZON-INFRA-2024-DEV-01 call (cordis.europa.eu/project/id/1...)
sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Jun 24
👩‍🏫 This first issue of the WST Chronicle includes descriptions of the WST consortium and its organisation, an overview of the science drivers and the top‐level requirements, and a presentation of the project timeline, among other information
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Jun 24
🤯 The Wide-Field Spectroscopic Telescope is a project to build a 12m telescope fully dedicated to multi-object spectroscopy. It will have a large FoV (>3 deg^2) and combine high‐multiplex spectrographs of both low‐ and high‐resolution and a giant panoramic integral field spectrograph
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Jun 24
🔭 ☄️ #stellarastro #galactic #instrumentation

🤩First issue of the WST Chronicle

www.wstelescope.com/wst-chronicle

📰 The WST Chronicle is an electronic magazine designed to keep the WST science teams and the broader scientific community updated on the latest developments of the project
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Jun 24
🔭 ☄️ #stellarastro
astrogeorges.bsky.social Georges Kordopatis @astrogeorges.bsky.social · Jun 23
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
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
The attached figure shows how our two stars compare to other known metal-poor stars that are rich in neutron capture elements (showing in particular, the chemical element europium).
sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
👨‍🏫 Finally, we also found that the chemical abundances in the two stars seem consistent with expectations for stars enriched by a single population III core collapse supernova. If true, this would make the two stars part of the second generation of stars being formed in the Universe.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
🚀 The other star, called TYC 9219-2422-1, is part of the Galactic halo and was formed outside the Milky Way, in the dwarf galaxy that merged with the Milky Way some 9 billion years ago and is now called the Gaia-Enceladus merger event.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
👵 We found that the star called BPS CS 29529-0089 was formed in proto-disk of the Milky Way, the structure that was just starting to form the disk of our Galaxy some 12 billion years ago.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
🛠💻 In this work, we investigated in detail the properties of two old metal-poor stars. We determined abundances of 27 neutron-capture elements for them. We also investigated their orbits in the Galaxy and tried to understand the origin of these stars.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
💥 In these processes, the atoms are gradually capturing several neutrons until at a later time some of the additional neutrons decay and transform into protons. When this happens, the atom becomes a new, heavier, chemical element.
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sagateam.bsky.social
SAGA Team @sagateam.bsky.social · Mar 14
⭐️ The bottom half of the periodic table, containing the elements heavier than Fe, cannot be produced by normal nuclear burning inside stars. They are produced by what astronomers call "neutron-capture processes".
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