ees2023.sciencesconf.org
Ecole Evry Schatzman 2023, La physique stellaire avec Gaia - Sciencesconf.org
A science-oriented feed about stars! Part of the Astronomy feeds network. Astronomers can sign up to post here via @bot.astronomy.blue Contains posts from signed up users with #stellarastrononomy or #stellarastro. Posts here are also included in the main Astronomy feed.
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The website for the school it was presented at has recordings of all the lectures - looks like a great resource for anyone wanting an introduction to modern stellar physics #astroedu #stellarastro 🔭 🧪
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Interested in stellar physics? Orlagh L. Creevey has posted their lecture notes & recorded lecture from a day-long introduction to stellar physics with Gaia!
#astroedu #stellarastro 🔭 🧪
arxiv.org
Stellar Physics Across the HR Diagram with Gaia
Gaia Data Release 3 (GDR3) contains a wealth of information to advance our knowledge of stellar physics. In these lecture notes we introduce the data products from GDR3 that can be exploited by the st...
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This stunning #Hubble image shows AFGL 5180, a beautiful and vast star-forming region in Gemini.
➡️ nasa.gov/image-featur...
Hubble’s WFC3 is able to capture images in visible and infrared light and so to see more clearly the young stars hidden in a dusty stellar nursery
🔭 🧪 #stellarastro #HST
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This alluring false-color composition from WISE (Wide-field Infrared Survey Explorer) shows the Rho Ophiuchi cloud complex glowing in various colors that represent different wavelengths of infrared light.
➡️ apod.nasa.gov/apod/ap11041...
Credit: NASA, JPL-Caltech, WISE Team
🔭 🧪 #stellarastro
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This ethereal beauty image, taken by JWST's Mid-Infrared Instrument (MIRI), showcases NGC 346, a young open star cluster with the associated nebula located some 200,000 ly away in the nearby Small Magellanic Cloud (SMC).
➡️ esa.int/ESA_Multimed...
🔭 🧪 #extragalactic #stellarastro #Webb #JWST
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NGC 6302, also known as the Butterfly Nebula, is a remarkable example of how stars, as they age, can take on some nice shapes sometimes resembling flowers or insects.
➡️ apod.nasa.gov/apod/ap22112...
This #Hubble image has been processed to highlight incredible
🔭 🧪 #stellarastro #galactic
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This splendid, new image of the young star cluster NGC 346 is part of the celebrations for the 35th anniversary of Hubble.
Credits: ESA/Hubble & NASA, A. Nota, P. Massey, E. Sabbi, C. Murray, M. Zamani (ESA/Hubble)
science.nasa.gov/missions/hub...
🔭 🧪 #stellarastro #cosmology #HST #extragalactic
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Excited to share our latest paper exploring binarity at SMC's low metallicity! 🌌 We've uncovered intriguing results about the binary fraction of B stars. Feedback and discussions warmly welcomed! arxiv.org/abs/2503.21936 #stellarastro #Binarity #MassiveStars
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This fantastic composite, depicting the double star cluster NGC 1850, is one of the images released to commemorate the 25th anniversary of Chandra X-Ray Observatory.
➡️ chandra.cfa.harvard.edu/photo/2024/2...
NGC 1850 is rather unusual as no other objects
🔭 🧪 #extragalactic #stellarastro
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This study, led by UNSW Sydney researchers, focuses on 27 stars with similar ages and compositions to our Sun, but in different evolutionary stages.
Let's dig deeper...
More at my post ➡️ www.tutto-scienze.org/2025/04/m67-...
🔭 🧪 #galactic #stellarastro #cosmology
www.tutto-scienze.org
M67 Stars Sing The Past And The Future: New Discoveries About The Red Giants
A recent study explores how the acoustic vibrations of stars in the open cluster M67, located 2,700 ly from Earth in the Milky Way, can reve...
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A recent study explores how the acoustic vibrations of stars in the open cluster M67, located 2,700 ly from Earth in the Milky Way, can reveal crucial information about their internal structure and evolution.
Image credit: Sloan Digital Sky Survey | CC BY 4.0
🔭 🧪 #galactic #stellarastro
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Terzan 5, a similar object, has been classified as a globular cluster for decades, but revealed as Liller 1 the presence of both very young and very old stellar populations.
Article➡️ cosmic-lab.eu/Cosmic-Lab/L...
Image Credit: F.R. Ferraro/C. Pallanca (UniBO)
🔭 🧪 #galactic #stellarastro
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Paper: #galactic #stellarastro
arxiv.org
Beyond the Main Sequence: Binary Evolution Pathways to Blue Stragglers in the Gaia Era I. Galactic Open and Globular Clusters
Context. The study of blue straggler stars (BSS) provides insight into the mechanisms of stellar mass exchange during binary stellar evolution and the complex gravitational interactions within dense s...
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Nice paper out today by Francisco Carrasco-Varela et al. looking at blue straggler stars in #galactic open and globular clusters! ☄️ #stellarastro
These weird stars form in mergers, and in their comprehensive survey they find an increasing fraction with age and multiple 'bumps' over time.
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ESA's Gaia mission has been a milestone in our understanding of the Universe.
Its farewell closes a chapter, but it leaves behind a remarkable legacy of discoveries that will continue to influence astronomy for decades to come.
Thank you, Gaia.
🔭 🧪 #Gaia #ESA #histsci #stellarastro #cosmology
ESA Operations@operations.esa.int
Today we say goodbye to ESA’s Milky Way-mapper Gaia! The Gaia spacecraft has completed its sky-scanning and will be switched off this morning.
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Hi #stellarastro #Astronomy 🔭
Is there a Delta Scuti type stars expert here? I have some questions!
Thaaaanks 😁
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today my first first author paper came out on arxiv (arxiv.org/abs/2503.05867)! this archive was a labor of love and there are still more updates to come in 2025 🤩 if you need high resolution archival NIR spectra check out RRISA for IGRINS :-) #astro #stellarastro
arxiv.org
10 Years of Archival High-Resolution NIR Spectra: The Raw and Reduced IGRINS Spectral Archive (RRISA)
The Immersion GRating INfrared Spectrometer (IGRINS) is a compact, high-resolution (R~45,000) near-infrared spectrograph spanning 1.45 to 2.45 um in a single exposure. We introduce the Raw and Reduced...
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Did you know solar flares usually come from Sun's active regions, often around sunspots, several times the Earth's size or more?
An X2.2 class solar flare was captured by NASA’s SDO on March 11, 2015.
Credit: NASA/GSFC/SDO
➡️ svs.gsfc.nasa.gov/11805/
🔭 🧪 ⚛️ #Astrophysics #stellarastro
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Interestingly, the star, which is marked by four long diffraction spikes, is located in our Milky Way just 7,109 ly from Earth.
This highlights how images of the cosmos can include objects at very different distances, creating a sort of perspective illusion.
🔭 🧪 #extragalactic #HST #stellarastro
ESA Space Science@science.esa.int
This star & spiral galaxy may appear to be neighbours, but they're actually separated by 45 million light-years. The image of the pair combines data from two instruments on the NASA/ESA #Hubble Space Telescope, taken more than 20 years apart. Read more 👉 esahubble.org/images/potw2... 🔭
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JWST's instruments, NIRCam and MIRI, reveal spectacular details of the spiral galaxy NGC 2283, in this image created by combining six shots with different filters in the near and mid-infrared.
Credit: ESA/Webb, NASA & CSA, A. Leroy
➡️ esawebb.org/images/potm2...
🔭 🧪 #extragalactic #stellarastro
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Hubble has captured a detailed image of the spiral galaxy UGC 5460, which is not only an object of cosmic beauty, but also a natural laboratory for studying extreme stellar phenomena such as supernovae.
Reference➡️ science.nasa.gov/missions/hub...
🔭 🧪 #extragalactic #stellarastro #HST #Hubble
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Ok, there is a SERIOUSLY cool online visualization that they made to go with the paper, which shows some very very pretty visualisations of the motion and parameters of our galaxy's stars #galactic #stellarastro
allsky.s3-website.us-east-2.amazonaws.com
allsky
An animated map of Galactic motion.
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Paper #3 of today for me is another by Josh Speagle et al., where they create a massive catalogue of 170 million stars (mostly in the halo/thick disk) that have accurate parameters derived with their BRUTUS code. #galactic #stellarastro arxiv.org/abs/2503.02200
Some very pretty figures!
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One thing that particularly caught my eye is that they also do empirical photometric corrections using open clusters. Stellar models are usually still a bit wrong, so this correction step is probably a big bonus for their accuracy #galactic #stellarastro
paper: arxiv.org/abs/2503.02227
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