@sacscience

Stellar Astrophysics Centre (SAC) is a Danish Center of Excellence at Aarhus University, Denmark, doing research on the sun, stars and extra-solar planets.

 Aarhus, Denmark
sac.au.dk
Joined September 2014
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  • Followers215
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Allerede som barn eksperimenterede prof. Jørgen Christensen-Dalsgaard fra @sacscience med kemiforsøg i barndomshjemmets kælder. Du kan læse om dette og meget mere i det 9. kapitel i ”Fortællinger fra Grundforskningens Grænseland" her: dg.dk/fortaellinger-fra-grun… #dkforsk #dkvid

Kapitel 9: Professor Jørgen Christensen-Dalsgaard - Danmarks Grundforskningsfond

Uddrag:     ” Jørgen Christensen-Dalsgaard har været interesseret i naturvidenskab, så længe han kan huske.”  »Jeg tror, jeg var syv år gammel, da jeg skrev…

dg.dk
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Yesterday TASOC released 12 million TESS light curves! Raw and systematics corrected using two different methods! Go do amazing science! #TDAWG0 @sacscience doi.org/10.5281/zenodo.45490… – at Arhus, Denmark
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Går du med en astronaut i maven? ESA søger nye astronauter - og det kunne være dig! Jeg har været med til at lave vores nye danske side blivastronaut.dk hvor du kan læse alt om hvordan du kan blive den næste dansker i rummet! #BlivAstronaut @sacscience – at Arhus, Denmark
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Looking at the Insides of Stars aasnova.org/2020/02/28/looki… @AarhusUni @sacscience @vsilvagui @NASA_TESS
Illustration of a space telescope with extended solar panels in the foreground, and a dim star with three planetary bodies around it in the background.

ALT Illustration of a space telescope with extended solar panels in the foreground, and a dim star with three planetary bodies around it in the background.

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Our paper presenting the first asteroseismic analysis of red giants observed by the TESS satellite has been highlighted by AAS Nova. Now off to unleash its potential for Galactic archaeology!
AAS Nova@AASNova28 Feb 2020
Looking at the Insides of Stars aasnova.org/2020/02/28/looki… @AarhusUni @sacscience @vsilvagui @NASA_TESS
Illustration of a space telescope with extended solar panels in the foreground, and a dim star with three planetary bodies around it in the background.

ALT Illustration of a space telescope with extended solar panels in the foreground, and a dim star with three planetary bodies around it in the background.

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Delphini-1 02:47 UTC 9K6 Telemetry over Japan @Delphini_1 @sacscience #cubesats
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Opdagelsen af 7 milliarder år gamle støvkorn ændrer vores forståelse af solsystemets dannelse. Morten Remar har talt med astronom Christoffer @karoff fra Geoscience Center ved Århus Universitet: soundcloud.com/science_stori… @sacscience @AarhusUni #mortenremar
Photo:Alex Antropov on Pixabay

ALT Photo:Alex Antropov on Pixabay

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Et studie af stjerneskælv fra en gammel stjerne afslører, at Mælkevejen stødte sammen med en dværggalakse for ca 11 milliarder år siden. Forskere fra grundforskningscentret @sacscience er med på holdet bag studiet. @vsilvagui @AarhusUni dg.dk/nyt-studie-fra-sac-ska… #dkvid #dkforsk

Nyt studie fra SAC: Skælv fra gammel stjerne afslører galaktisk sammenstød - Danmarks Grundforskn...

Et nyt studie af stjerneskælvet fra en gammel stjerne afslører, at Mælkevejen stødte sammen med en dværggalakse for omkring 11 milliarder år siden. Bag studiet,…

dg.dk
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Nu Indi is a very old star, kinematically heated by a galactic merger with our Milky Way, most likely the Gaia-Enceladus merger. Constraining the age of nu Indi with @NASA_TESS puts the merger at more than 11 Gyr ago (95% confidence). Chaplin et al.: nature.com/articles/s41550-0…
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Our paper in Nature Astronomy is out! Putting constraints on the time of the Gaia Enceladus merger, led by our colleague Bill Chaplin. @sacscience @AarhusUni
Nature Astronomy@NatureAstronomy13 Jan 2020
Nu Indi is a very old star, kinematically heated by a galactic merger with our Milky Way, most likely the Gaia-Enceladus merger. Constraining the age of nu Indi with @NASA_TESS puts the merger at more than 11 Gyr ago (95% confidence). Chaplin et al.: nature.com/articles/s41550-0…
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I don't often contribute to Open Source projects (not as much as I should), but when I do it's for the really awesome projects! Astropy 4.0 is out! #padmyownback #minorcontribution @sacscience – at Arhus, Denmark
Astropy@astropy9 Jan 2020
Astropy v4.0 has been released! See the announcement at astropy.org/announcements/re… to find out more about what's new, and how to update or install with pip and conda. 4.0 is an LTS release, which means it will be supported for the next 2 years! #python #science #astronomy

Astropy v4.0 Released!

Dear colleagues, We are very happy to announce the v4.0 release of the Astropy package, a core Python package for Astronomy: https://www.astropy.org Astropy is a community-driven Python package int...

astropy.org
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Paper out today! Detection and characterisation of oscillating red giants: first results from the TESS satellite. What did we find? arxiv.org/abs/1912.07604

Detection and characterisation of oscillating red giants: first...

Since the onset of the `space revolution' of high-precision high-cadence photometry, asteroseismology has been demonstrated as a powerful tool for informing Galactic archaeology investigations....

arxiv.org
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Have you been wondering what is the uncertainty introduced by your choice of stellar evolution models when determining the properties of your favourite star? The first paper of the series is out in the arxiv today: The Aarhus red giants challenge arxiv.org/abs/1912.04909

The Aarhus Red Giants Challenge I: Stellar structures in the red...

(Abridged). We introduce the Aarhus Red Giants Challenge, a series of detailed comparisons between widely used stellar evolution and oscillation codes aiming at establishing the minimum level of...

arxiv.org
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I’m thrilled to announce: as of today I’m an associate professor in astronomy at @AarhusUni and @sacscience
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🎥 Kicking off our #HowWeMakeASpaceMission week, find out more about the essential enabling and support activities that go into making each and every ESA space mission happen #BestEngineeringInEurope #MakersAndDoers youtu.be/uz_tcjY_t-U

How do you build a spaceship?

How do you build a spaceship? It’s not easy – because space is hard. It takes clever engineering – and costly research and development – to operate in orbit.

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SAC retweeted
ESO@ESO22 Mar 2019
How strange does a star have to be in order to be named “What Is This?” Find out in our latest post of the #ESOblog. #Stars #ExtremeScience socsi.in/UDOFA
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STEM PÅ DIT FAVORITBILLEDE: Så er det muligt at stemme på dit favoritbillede blandt de 10 udvalgte bidrag indsendt til vores #Fotokonkurrence 2019. Alle forskere baseret i DK har haft mulighed for at indsende deres bedste fotos fra forskningens verden. #dkvid #dkforsk
Videnskab.dk@videnskabdk12 Mar 2019
Fotokonkurrence: Nu kan du endelig stemme på din favorit blandt de ti forsker-billeder, som en jury nedsat af @GrundforskFond har valgt📷 Følg linket for at se de ti billeder og afgive din stemme. videnskab.dk/naturvidenskab/… #dkvid #dkforsk @eriksen_ie
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Orion Nebula with our SkyCam-2 at the #SONGtelescope @sacscience
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Enormt planetsammenstød kan forklare tvillingplaneter - Nyt i @NatureAstronomy fra bl.a. Grundforskningscentret @sacscience ved @AarhusUni #Kepler-107 #dkvid #dkforsk #dkastro dg.dk/sac-enormt-planetsamme…
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Kepler-107 c has the same radius as Kepler-107 b but has a Mercury-like density, more than twice its innermost twin: was it hit by a giant impact? Bonomo et al.: rdcu.be/bj4pI
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