Romain Meyer
@astrorameyer.bsky.social
Astronomy postdoc UNIGE - Studying the Universe in the 1st Gyr: Galaxies, SMBH, Reionisation - All views are my own. (he/him)
http://rameyer.github.io
http://rameyer.github.io
A delayed announcement - the 2nd chapter of the Saas-Fee 2025 Lectures is now out on arXiv. Marta Volonteri did a fantastic job reviewing how we model the formation and growth of early massive black holes, and how JWST results are helping: arxiv.org/abs/2510.04599 (another 2 chapters will follow)
November 7, 2025 at 10:01 AM
A delayed announcement - the 2nd chapter of the Saas-Fee 2025 Lectures is now out on arXiv. Marta Volonteri did a fantastic job reviewing how we model the formation and growth of early massive black holes, and how JWST results are helping: arxiv.org/abs/2510.04599 (another 2 chapters will follow)
Reposted by Romain Meyer
Quand notre ministre de tutelle nous insulte devant la représentation nationale. "Bande de nuls" "complètement à la ramasse".
Nous reprocher des taux de réussite faible à Horizon Europe et ERC, quand manquent les moyens pour assurer nos missions de service public. Surtout changez rien!👌
Nous reprocher des taux de réussite faible à Horizon Europe et ERC, quand manquent les moyens pour assurer nos missions de service public. Surtout changez rien!👌
October 31, 2025 at 8:55 AM
Quand notre ministre de tutelle nous insulte devant la représentation nationale. "Bande de nuls" "complètement à la ramasse".
Nous reprocher des taux de réussite faible à Horizon Europe et ERC, quand manquent les moyens pour assurer nos missions de service public. Surtout changez rien!👌
Nous reprocher des taux de réussite faible à Horizon Europe et ERC, quand manquent les moyens pour assurer nos missions de service public. Surtout changez rien!👌
Reposted by Romain Meyer
Another STUNNING image from JWST, this time of the Red Spider Nebula—the vast, wispy, gaseous remains of a now-dead star, the white dwarf core still glowing in the centre.
October 28, 2025 at 5:59 PM
Another STUNNING image from JWST, this time of the Red Spider Nebula—the vast, wispy, gaseous remains of a now-dead star, the white dwarf core still glowing in the centre.
You probably missed it because of some deadline but on Tuesday we published the results of an [OIII] emitters search in the COMOS(-3D) field using slitlless spectroscopy. That's *237* 6.7<z<9 uniformly-selected spec-z galaxies over 0.3 degrees square. See the piled 2D plots below, that's a lot!
October 17, 2025 at 2:41 PM
You probably missed it because of some deadline but on Tuesday we published the results of an [OIII] emitters search in the COMOS(-3D) field using slitlless spectroscopy. That's *237* 6.7<z<9 uniformly-selected spec-z galaxies over 0.3 degrees square. See the piled 2D plots below, that's a lot!
October 17, 2025 at 2:34 PM
You probably missed it because of some deadline but on Tuesday we published the results of an [OIII] emitters search in the COMOS(-3D) field using slitlless spectroscopy. That's *237* 6.7<z<9 uniformly-selected spec-z galaxies over 0.3 degrees square. See the piled 2D plots below, that's a lot!
Reposted by Romain Meyer
On astro-ph today, a nice set of lecture notes from Richard Ellis (UCL) on Galaxies and Black Holes in the first Billion years - with special focus on new results from JWST. It also illustrates why MIRI is essential for accurately estimating galaxies' stellar masses ✨ arxiv.org/abs/2508.16948 🔭
Galaxies and Black Holes in the First Billion Years
I present written notes from three lectures given at the 54th Saas-Fee Advanced Course of the Swiss Society of Astrophysics and Astronomy in January 2025 entitled "Galaxies and Black Holes in the Firs...
arxiv.org
August 27, 2025 at 1:12 AM
On astro-ph today, a nice set of lecture notes from Richard Ellis (UCL) on Galaxies and Black Holes in the first Billion years - with special focus on new results from JWST. It also illustrates why MIRI is essential for accurately estimating galaxies' stellar masses ✨ arxiv.org/abs/2508.16948 🔭
In January we held the very successful Saas-Fee Lectures on the revolution JWST is unleashing in high-redshift studies, covering BH and galaxies, observations and theory.
The first set of lecture notes by Richard Ellis is now available on arXiv (3 more will follow): arxiv.org/abs/2508.16948 .
The first set of lecture notes by Richard Ellis is now available on arXiv (3 more will follow): arxiv.org/abs/2508.16948 .
Galaxies and Black Holes in the First Billion Years
I present written notes from three lectures given at the 54th Saas-Fee Advanced Course of the Swiss Society of Astrophysics and Astronomy in January 2025 entitled "Galaxies and Black Holes in the Firs...
arxiv.org
August 26, 2025 at 8:08 AM
In January we held the very successful Saas-Fee Lectures on the revolution JWST is unleashing in high-redshift studies, covering BH and galaxies, observations and theory.
The first set of lecture notes by Richard Ellis is now available on arXiv (3 more will follow): arxiv.org/abs/2508.16948 .
The first set of lecture notes by Richard Ellis is now available on arXiv (3 more will follow): arxiv.org/abs/2508.16948 .
Reposted by Romain Meyer
We are excited to make the first official announcement for the 𝗖𝗵𝗮𝗿𝘁𝗶𝗻𝗴 𝗖𝗼𝘀𝗺𝗶𝗰 𝗗𝗮𝘄𝗻 conference in Copenhagen in 12–17 April next year 🤩
cosmicdawn.dk/meetings-and...
cosmicdawn.dk/meetings-and...
Charting Cosmic Dawn in Copenhagen 2026 - Cosmic Dawn Center
An overview of the 2026 workshop "Charting Cosmic Dawn in Copenhagen."
cosmicdawn.dk
August 13, 2025 at 12:40 PM
We are excited to make the first official announcement for the 𝗖𝗵𝗮𝗿𝘁𝗶𝗻𝗴 𝗖𝗼𝘀𝗺𝗶𝗰 𝗗𝗮𝘄𝗻 conference in Copenhagen in 12–17 April next year 🤩
cosmicdawn.dk/meetings-and...
cosmicdawn.dk/meetings-and...
Reposted by Romain Meyer
Extremely excited to share that the PHOENIX team, led by PhD student Sander Schouws in Leiden, has been awarded 113 hours of ALMA time in Cycle 12—along with JWST MIRI spectroscopy! We’ll be targeting [OIII]88 and the dust continuum in 15 of the brightest spectroscopically confirmed galaxies 1/n
August 7, 2025 at 3:25 PM
Extremely excited to share that the PHOENIX team, led by PhD student Sander Schouws in Leiden, has been awarded 113 hours of ALMA time in Cycle 12—along with JWST MIRI spectroscopy! We’ll be targeting [OIII]88 and the dust continuum in 15 of the brightest spectroscopically confirmed galaxies 1/n
Reposted by Romain Meyer
Whoa. Three Little Red Dots have now been found in SDSS! arxiv.org/abs/2507.10659
But due to their compact morphology and bizarre colors, they are originally selected as *quasar candidates*, not galaxies! In any event, LRDs are not unique to the high-z universe.
#astrosci
But due to their compact morphology and bizarre colors, they are originally selected as *quasar candidates*, not galaxies! In any event, LRDs are not unique to the high-z universe.
#astrosci
The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes
JWST observations have revealed a population of high-redshift "little red dots" (LRDs) that challenge conventional AGN models. We report the discovery of three local LRDs at $z = 0.1-0.2$, initially s...
arxiv.org
July 16, 2025 at 10:57 AM
Whoa. Three Little Red Dots have now been found in SDSS! arxiv.org/abs/2507.10659
But due to their compact morphology and bizarre colors, they are originally selected as *quasar candidates*, not galaxies! In any event, LRDs are not unique to the high-z universe.
#astrosci
But due to their compact morphology and bizarre colors, they are originally selected as *quasar candidates*, not galaxies! In any event, LRDs are not unique to the high-z universe.
#astrosci
and once again, the JWST call for proposal is in exact sync with the ERC StG deadline.. 🥲
July 8, 2025 at 1:52 PM
and once again, the JWST call for proposal is in exact sync with the ERC StG deadline.. 🥲
Reposted by Romain Meyer
May 19, 2025 at 6:42 AM
🧵 Today is paper day for me! Usually I don’t post about papers but I have a special soft spot for this one: the detection of the Gunn-Peterson trough in high-redshift *galaxies* !!
arxiv.org/abs/2504.02683
#astrosci #extragalactic #cosmology
arxiv.org/abs/2504.02683
#astrosci #extragalactic #cosmology
April 4, 2025 at 1:32 PM
🧵 Today is paper day for me! Usually I don’t post about papers but I have a special soft spot for this one: the detection of the Gunn-Peterson trough in high-redshift *galaxies* !!
arxiv.org/abs/2504.02683
#astrosci #extragalactic #cosmology
arxiv.org/abs/2504.02683
#astrosci #extragalactic #cosmology
Reposted by Romain Meyer
For a video explainer, I'm looking for scientists working in the US, or in collaboration with US scientists, or with US data's, whose work is impacted by the new Trump administration.
🙏If you are willing to be interviewed (video interview in a French newspaper) DM me !
🙏If you are willing to be interviewed (video interview in a French newspaper) DM me !
March 18, 2025 at 3:06 PM
For a video explainer, I'm looking for scientists working in the US, or in collaboration with US scientists, or with US data's, whose work is impacted by the new Trump administration.
🙏If you are willing to be interviewed (video interview in a French newspaper) DM me !
🙏If you are willing to be interviewed (video interview in a French newspaper) DM me !
Reposted by Romain Meyer
These are woke 🔭 things according to Ted "gave Craig Mazin the general vibe for Chernobyl" Cruz:
Studying reionization (and making vague promises to train students from underrepresented groups doing so, like NSF requested)
Studying reionization (and making vague promises to train students from underrepresented groups doing so, like NSF requested)
February 12, 2025 at 6:17 AM
These are woke 🔭 things according to Ted "gave Craig Mazin the general vibe for Chernobyl" Cruz:
Studying reionization (and making vague promises to train students from underrepresented groups doing so, like NSF requested)
Studying reionization (and making vague promises to train students from underrepresented groups doing so, like NSF requested)
Reposted by Romain Meyer
We are experiencing technical problems which are part of some growing pains (more content, more users, same infrastructure). At the moment there are no funding or programmatic threats to ADS. Thank you for your patience while we sort things out.
February 11, 2025 at 2:04 PM
We are experiencing technical problems which are part of some growing pains (more content, more users, same infrastructure). At the moment there are no funding or programmatic threats to ADS. Thank you for your patience while we sort things out.
Reposted by Romain Meyer
I'm getting increasingly worried about NASA/ADS, which has not been working for some time...
bsky.app/profile/tele...
bsky.app/profile/tele...
The Threat to the Astrophysics Data System
Many times on this blog I have mentioned many times is the SAO/NASA Astrophysics Data System which (for the uninitiated) is a Digital Library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory (SAO)…
Many times on this blog I have mentioned many times is the SAO/NASA Astrophysics Data System which (for the uninitiated) is a Digital Library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory (SAO)…
The Threat to the Astrophysics Data System
Many times on this blog I have mentioned many times is the SAO/NASA Astrophysics Data System which (for the uninitiated) is a Digital Library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 14.0 million records covering publications in Astronomy and Astrophysics, Physics, and (of course) the arXiv e-prints.
telescoper.blog
February 11, 2025 at 11:53 AM
I'm getting increasingly worried about NASA/ADS, which has not been working for some time...
bsky.app/profile/tele...
bsky.app/profile/tele...
NASA ADS is really struggling today and I really hope this is not due to some Musk interference.. 🫣 #astronomy
February 11, 2025 at 10:45 AM
NASA ADS is really struggling today and I really hope this is not due to some Musk interference.. 🫣 #astronomy
For the first time in my astronomer's life, I submitted TWO full days in advance for a major grant deadline - what am I supposed to do now?
January 14, 2025 at 8:58 AM
For the first time in my astronomer's life, I submitted TWO full days in advance for a major grant deadline - what am I supposed to do now?
Perks of working in Switzerland: nothing can beat the office window view
January 10, 2025 at 3:11 PM
Perks of working in Switzerland: nothing can beat the office window view
Reposted by Romain Meyer
Further to this: please share my joy at this bonkers JWST image of star cluster Westerlund 1, released in Oct. Read more about this amazing cluster and the image: esawebb.org/images/potm2...
Image credit:ESA/Webb, NASA & CSA, M. Zamani (ESA/Webb), M. G. Guarcello (INAF-OAPA) and the EWOCS team 🔭
Image credit:ESA/Webb, NASA & CSA, M. Zamani (ESA/Webb), M. G. Guarcello (INAF-OAPA) and the EWOCS team 🔭
November 12, 2024 at 4:53 PM
Further to this: please share my joy at this bonkers JWST image of star cluster Westerlund 1, released in Oct. Read more about this amazing cluster and the image: esawebb.org/images/potm2...
Image credit:ESA/Webb, NASA & CSA, M. Zamani (ESA/Webb), M. G. Guarcello (INAF-OAPA) and the EWOCS team 🔭
Image credit:ESA/Webb, NASA & CSA, M. Zamani (ESA/Webb), M. G. Guarcello (INAF-OAPA) and the EWOCS team 🔭
Are you an ECR? Do you like #JWST ? High-z galaxies/SMBHs? Skiing/curling/ice-skating/eating fondue in the Swiss Alps? 🔭
Applications are now open for the 54th Saas-Fee Course on "Galaxies and Black Holes in the 1 Gyr as seen with the JWST" - Jan 27-31, 2025 - more info: astro.unige.ch/saasfee2025/
Applications are now open for the 54th Saas-Fee Course on "Galaxies and Black Holes in the 1 Gyr as seen with the JWST" - Jan 27-31, 2025 - more info: astro.unige.ch/saasfee2025/
September 6, 2024 at 2:07 PM
Are you an ECR? Do you like #JWST ? High-z galaxies/SMBHs? Skiing/curling/ice-skating/eating fondue in the Swiss Alps? 🔭
Applications are now open for the 54th Saas-Fee Course on "Galaxies and Black Holes in the 1 Gyr as seen with the JWST" - Jan 27-31, 2025 - more info: astro.unige.ch/saasfee2025/
Applications are now open for the 54th Saas-Fee Course on "Galaxies and Black Holes in the 1 Gyr as seen with the JWST" - Jan 27-31, 2025 - more info: astro.unige.ch/saasfee2025/
Do never complain again about JWST/ALMA being oversubscribed: "The number of hours requested by proposals in period 114 on UT4 amounted to 28.7 the available time" 🤯😱😂
July 9, 2024 at 6:35 AM
Do never complain again about JWST/ALMA being oversubscribed: "The number of hours requested by proposals in period 114 on UT4 amounted to 28.7 the available time" 🤯😱😂