John R. Weaver

Charting cosmic history | Astrophysicist | Brinson Fellow @MIT | PhD @DAWNCopenhagen | MPhys @univofstandrews | Believer in open, inclusive science

[John R. Weaver @AstroWeave]

I’m thrilled to share that I’ve been awarded a 2025 #BrinsonPrizeFellowship and will be joining @MIT this fall!
I’ll be using #ESAEuclid to study cosmic dawn and the first galaxies.
Grateful to The Brinson Foundation and @STScI for this opportunity.
🔗 https://t.co/ixYPzcmw8j

[John R. Weaver @AstroWeave]

This is just the beginning for Euclid! Soon we’ll have even deeper data over a total of 53 sq. degrees: the Euclid Deep Fields. Take a peek from optical images taken by our team to complement Euclid’s near-infrared survey: https://t.co/xBCbl26Lik

Stay tuned for more!

[John R. Weaver @AstroWeave]

BIG paper day for #ESAEuclid! Thanks to Euclid’s infrared sensitivity and wide field of view, myself and a 100+ team (incl. @SinaTml, @dyonysos ) found 29 ultra-rare UV-bright z~6-8 galaxies! They’re missing in visible light, many with huge 2 mag breaks! https://t.co/JMYar8zTZM

[John R. Weaver @AstroWeave]

Beyond the 29 z~6-8 galaxy candidates, we also found a whopping 139 extremely red objects that also lack visible light. Likely a mixture of extremely dusty and quiescent galaxies at z~1-3 — need far-infrared data to confirm!

[ESA Science @esascience]

Euclid celebrates first science with sparkling cosmic views! 🤩

From faint to bright, from distant to nearby, from the most massive of galaxy clusters to small planets, these images demonstrate @ESA_Euclid 's ability to unravel the secrets of the cosmos.

Access them here👉 https://t.co/N1c7EL3Wiu and read more about each image below 🧵👇

[DAWN - The Cosmic Dawn Center @DAWNCopenhagen]

The first scientific studies from @ESA_Euclid have just been released, and many years of Danish involvement is paying off.

One study, led by @AstroWeave, explores invisible galaxies.

🇬🇧 https://t.co/SAoJa7yYBS
🇩🇰 https://t.co/OLfbD18WQZ
@GrundforskFond @Carlsbergfondet

[Rohan Naidu @Rohan_Naidu]

Gorgeous #JWST spectrum of a z=9.76 galaxy from @grobertsborsani and team on the arXiv tonight!!! A vivid demonstration of how easily JW can confirm/refute the similarly luminous/more luminous Universe-breaking candidates at even higher redshifts!

[gbrammer @gbrammer]

Let's just see what JWST observed yesterday...
Oh, good god.

[Brittany @physenvy]

@AstroWeave kicking off our science talks for #COSMOS2022Paris at the IAP in Paris! Before that we had some updates on the COSMOS2020 data.

[RAS Journals @RAS_Journals]

In MNRAS and open access: "Dust and the intrinsic spectral index of quasar variations: hints of finite stress at the innermost stable circular orbit", Weaver & Horne. This is Fig. 12: for the caption and to read the paper visit https://t.co/pK09KALY8N

[gbrammer @gbrammer]

#JWST is looking awesome

[John R. Weaver @AstroWeave]

How do supermassive black holes interact with their accretion discs? Long-term variability can teach us a lot. Find out the unexpected physics we may have uncovered:
https://t.co/UUxpHIbNmB

@DAWNCopenhagen
@PhysAstroStAnd
@GrundforskFond

Credit: NOIRLab/NSF/AURA/J. da Silva

[John R. Weaver @AstroWeave]

At long last, #cosmos2020 has been officially published! Read about it here: https://t.co/pvSWY1klYQ Now we’re gearing up to observe them with @NASAWebb!

@cosmosastro @DAWNCopenhagen @GrundforskFond

[John R. Weaver @AstroWeave]

#cosmos2020 is live! I am thrilled to finally have this enormous galaxy catalog accepted to ApJS and posted to arXiv today!

https://t.co/6ZulcEtH75

Catalogs are now public: https://t.co/nkzGf6VZql

@cosmosastro @DAWNCopenhagen

[John R. Weaver @AstroWeave]

Opening day of #NAM2021! Looking forward to seeing familiar faces, and meeting new ones. I’ll be discussing the latest results from the #COSMOS survey during the FLARE I Session later today.

@cosmosastro @DAWNCopenhagen

[John R. Weaver @AstroWeave]

Excited to talk about “Beasts in the Bubbles” - ultra-luminous galaxies at cosmic dawn - at the #SAZERAC2 meeting in ~40mins. You can tune in live here: https://t.co/djznNqDleQ

[John R. Weaver @AstroWeave]

@Jurgenvilla @Caltech @caltechipac @cosmosastro Had to sort out some technical/security details, but here it is! https://t.co/AMTo2OBY3s The link will expire after 48 hours. Please let me know if you have any questions, thanks!

[John R. Weaver @AstroWeave]

Excited to talk about my latest work on the COSMOS2020 Galaxy Catalog later today “at” @Caltech

@caltechipac @cosmosastro

Info here: https://t.co/jqeHddsYIU

[John R. Weaver @AstroWeave]

@Jurgenvilla @Caltech @caltechipac @cosmosastro Not sure! They did record it, but I’m not sure where it’s being hosted (public or internal). I’ll check!