Callum Donnan (@cdonnanastro) 's Twitter Profile
Callum Donnan

@cdonnanastro

Postdoc at NOIRLab. Galaxy formation/evolution at high z.

ID: 1495803675477950466

linkhttp://ctdonnan.github.io calendar_today21-02-2022 16:52:54

86 Tweet

340 Followers

255 Following

Emma Curtis Lake (@astronomeremma) 's Twitter Profile Photo

Guys, not long until we hear about that redshift 16.4 galaxy. Observations scheduled this Friday! Is it z~5 or z~16? Can't wait to find out!

Steve Finkelstein 🪐 (@astrosteven) 's Twitter Profile Photo

It is very exciting that Pablo Arrabal Haro’s JWST CEERS Collaboration DDT observations of #Maisiesgalaxy and Callum Donnan’s galaxy were obtained overnight. The JWST CEERS Collaboration and Edinburgh teams are hard at work on a joint paper, and we will be excited to share our results here when we submit!

Pablo Arrabal Haro (@richarwirman) 's Twitter Profile Photo

I can barely think of words to tweet after what we have done these last 2.5 days... 🫠 But here you have the first results of the greatly awaited DDT observations 😃 (Spoiler: two new spectroscopically confirmed z > 10 galaxies! 😱) arxiv.org/abs/2303.15431

Jeyhan (@jeyhan) 's Twitter Profile Photo

Pablo Arrabal Haro Callum Donnan Adam Carnall Dr. Rebecca Larson Dr Taylor Hutchison 🍉 Jorge Zavala For me, a huge takeaway from working with these public datasets is that we have an incredible chance to collaborate, rather than compete, with each other. This project was a lot more fun working together!

Thomas Stanton (@hetmstanton) 's Twitter Profile Photo

Excited to be presenting a poster at nam 2023, showing preliminary results from the joint analysis of rest-frame optical and UV spectra of star-forming galaxies at z~3.5, with the aim of investigating how oxygen/iron abundances scale with galaxy properties, and alpha enhancement.

Excited to be presenting a poster at nam 2023, showing preliminary results from the joint analysis of rest-frame optical and UV spectra of star-forming galaxies at z~3.5, with the aim of investigating how oxygen/iron abundances scale with galaxy properties, and alpha enhancement.
Fergus Cullen (@ferguslpcullen) 's Twitter Profile Photo

New paper on the arXiv today - investigating the UV continuum SEDs of galaxy candidates at z > 8. Our main new finding is that at z > 10 the UV continuum looks uniformly `dust-free' . arxiv.org/abs/2311.06209

Thomas Stanton (@hetmstanton) 's Twitter Profile Photo

My first lead-author paper is on arxiv today! 🤠 By measuring the O and Fe abundances of star-forming galaxies at z≈3.5, we constrain the stellar + gas-phase mass-metallicity relationships and find our galaxies have ubiquitously supersolar O/Fe ratios! arxiv.org/abs/2405.00774

Thomas Stanton (@hetmstanton) 's Twitter Profile Photo

New paper today!🤠 For a sample of star-forming galaxies at z ≈ 4 from the EXCELS survey, we measure the electron temperatures, densities, and the Ar/O and Ne/O abundance ratios. Our main result is that Ar/O is lower at high-z compared to local sources! arxiv.org/abs/2411.11837

Physics Astro @ Edin (@physastroed) 's Twitter Profile Photo

The School awards annual prizes to postgraduate research students who have produced the best PhD thesis. Many congratulations to the latest winners: · Jordan Marsh · Matteo Sergola · Ryan Begley · Massi Hamadouche · Ivan Lobaskin 🙌 Full story: edin.ac/4ihORaa

The School awards annual prizes to postgraduate research students who have produced the best PhD thesis. Many congratulations to the latest winners:

· Jordan Marsh
· Matteo Sergola
· Ryan Begley
· Massi Hamadouche
· Ivan Lobaskin

🙌

Full story: edin.ac/4ihORaa