M. Brinch

The JWST Emission Line Survey (JELS): Multi-wavelength properties of Paschen line-emitters at Cosmic Noon

Malte Brinch, Edo Ibar, Luis Ossa-Fuentes +14

Context: Narrowband JWST/NIRCam selection isolates star-forming galaxies in well-defined redshift slices, while ALMA and archival far-IR/submm data reveal obscured growth. We combi…

Constraining reionization-era Ly $α$ escape with JELS-MUSE: a highly complete H $α$ -selected sample at $z \sim 6.1$

A. L. Patrick, K. J. Duncan, Z. Li +16

The Ly $α$ escape fraction, $f_{esc}^{Ly α}$ , probes both the interstellar medium (ISM) conditions governing ionizing photon escape and the rising neutral fraction of the I…

The JWST Emission Line Survey (JELS): A narrow-band determination of the H $α$ Luminosity Function and Cosmic Star Formation into the Epoch of Reionization

C. A. Pirie, K. J. Duncan, P. N. Best +19

The recent star-formation activity in galaxies can be optimally traced by the H $α$ emission line, with the resulting H $α$ luminosity function (LF) at a given epoch providing a reli…

Ly $α$ Escape in JWST/NIRCam F430M-Selected H $α$ Emitters at $z ≃ 5.5$

Cheng Cheng, Zhen-Ya Zheng, Chunyan Jiang +8

We study the Ly $α$ escape fraction ( $f_{esc}$ ) in an H $α$ -selected sample of star-forming galaxies at $z ≃ 5.5$ , identified via JWST/NIRCam F430M excess and covered by archi…

astro-ph.CO2026★ 4 cited

An ultra-high-resolution map of (dark) matter

Diana Scognamiglio, Gavin Leroy, David Harvey +38

Ordinary matter-including particles such as protons and neutrons-accounts for only about one sixth of all matter in the Universe. The rest is dark matter, which does not emit or ab…

astro-ph.GA2025

Large-Scale Structure in COSMOS-Web: Tracing Galaxy Evolution in the Cosmic Web up to $z \sim 7$ with the Largest JWST Survey

Hossein Hatamnia, Bahram Mobasher, Sina Taamoli +31

We present a reconstruction of the large-scale structure using the James Webb Space Telescope's (JWST) COSMOS-Web program to trace environmentally driven galaxy evolution up to $z\…

The stellar mass function of quiescent and star-forming galaxies and its dependence on morphology in COSMOS-Web

Marko Shuntov, Olivier Ilbert, Claudia del P. Lagos +33

We study the stellar mass function (SMF) of quiescent and star-forming galaxies and its dependence on morphology in 10 redshift bins at $0.2 < z < 5.5$ using the COSMOS2025 catalog bui…

The JWST Emission Line Survey (JELS): The sizes and merger fraction of star-forming galaxies during the Epoch of Reionization

H. M. O. Stephenson, J. P. Stott, C. A. Pirie +18

We used observations from the JWST Emission Line Survey (JELS) to measure the half-light radii ( $r_{e}$ ) of 23 H $α$ -emitting star-forming (SF) galaxies at $z = 6.1$ in the PRIMER/COS…

astro-ph.GA2025★ 45 cited

Cosmic Vine: High abundance of massive galaxies and dark matter halos in a forming cluster at z=3.44

Nikolaj B. Sillassen, Shuowen Jin, Georgios E. Magdis +10

The Cosmic Vine is a massive protocluster at z=3.44 in the JWST CEERS field, offering an ideal laboratory for studying the early phases of cluster formation. Using the data from th…

astro-ph.GA2025

Probing Obscured Star Formation in Galaxy Clusters Using JWST Medium Band Images: 3.3 $μ m$ PAH Emitter Sample in Abell 2744

Cheng Cheng, Xin Wang, Piaoran Liang +7

Star-forming galaxies in galaxy clusters play a crucial role in understanding the advanced stages of galaxy evolution within dense environments. We present a sample of 3.3 $μ$ m PAH-…

COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging

Marko Shuntov, Hollis B. Akins, Louise Paquereau +55

We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts and physical parameters for more than 700,000 galaxies in the Cosmic Evolution Survey…

astro-ph.GA2025★ 12 cited

COSMOS Spectroscopic Redshift Compilation (First Data Release): 488k Redshifts Encompassing Two Decades of Spectroscopy

Ali Ahmad Khostovan, Jeyhan S. Kartaltepe, Mara Salvato +54

We present the COSMOS Spectroscopic Redshift Compilation encompassing ~ 20 years of spectroscopic redshifts within a 10 deg $^{2}$ area centered on the 2 deg $^{2}$ COSMOS legacy field.…

astro-ph.GA2025★ 6 cited

Revealing the hidden cosmic feast: A z=4.3 galaxy group hosting two optically dark, efficiently star-forming galaxies

Malte Brinch, Shuowen Jin, Raphael Gobat +11

We present the confirmation of a compact galaxy group candidate, CGG-z4, at $z = 4.3$ in the COSMOS field. This structure was identified by two spectroscopically confirmed $z = 4.3$ $K…

The COSMOS-Web deep galaxy group catalog up to $z = 3.7$

Greta Toni, Ghassem Gozaliasl, Matteo Maturi +41

Galaxy groups with $M_{t o t} ≲ 1 0^{14}$ $M_{⊙}$ and up to a few tens of members are the most common galaxy environment, marking the transition between field and massive clu…

astro-ph.GA2024★ 5 cited

Behind the dust veil: A panchromatic view of an optically dark galaxy at z=4.82

Nikolaj B. Sillassen, Shuowen Jin, Georgios E. Magdis +30

Optically dark dusty star-forming galaxies (DSFGs) play an essential role in massive galaxy formation at early cosmic time, however their nature remains elusive. Here we present a…

astro-ph.GA2024★ 13 cited

EELG1002: A Record-Breaking [OIII]+H $β$ EW $\sim 3700$ Å~Galaxy at $z \sim 0.8$ -- Analog of Early Galaxies?

Ali Ahmad Khostovan, Jeyhan S. Kartaltepe, Malte Brinch +6

We present a detailed analysis of EELG1002: a $z = 0.8275$ EELG identified within archival Gemini/GMOS spectroscopy as part of the on-going COSMOS Spectroscopic Archive. We find EE…

COSMOS-Web: A history of galaxy migrations over the stellar mass-star formation rate plane

R. C. Arango-Toro, O. Ilbert, L. Ciesla +39

The stellar mass-star formation rate ( $M_{*}$ - $SFR$ ) plane is a fundamental diagnostic for distinguishing galaxy populations. However, the evolutionary pathways of…

astro-ph.GA2024★ 2 cited

SCUBADive I: JWST+ALMA Analysis of 289 sub-millimeter galaxies in COSMOS-Web

Jed McKinney, Caitlin M. Casey, Arianna S. Long +36

JWST has enabled detecting and spatially resolving the heavily dust-attenuated stellar populations of sub-millimeter galaxies, revealing detail that was previously inaccessible. In…

astro-ph.GA2024★ 17 cited

The RAdio Galaxy Environment Reference Survey (RAGERS): Evidence of an anisotropic distribution of submillimeter galaxies in the 4C 23.56 protocluster at z=2.48

Dazhi Zhou, Thomas R. Greve, Bitten Gullberg +41

High-redshift radio(-loud) galaxies (H $z$ RGs) are massive galaxies with powerful radio-loud active galactic nuclei (AGNs) and serve as beacons for protocluster identification. Howe…

NOEMA formIng Cluster survEy (NICE): Characterizing eight massive galaxy groups at $1.5 < z < 4$ in the COSMOS field

Nikolaj B. Sillassen, Shuowen Jin, Georgios E. Magdis +41

The NOEMA formIng Cluster survEy (NICE) is a large program targeting 69 massive galaxy group candidates at $z > 2$ in six deep fields. We report spectroscopic confirmation of eight g…

astro-ph.GA2024★ 16 cited

COSMOS-Web: The over-abundance and physical nature of "little red dots"--Implications for early galaxy and SMBH assembly

Hollis B. Akins, Caitlin M. Casey, Erini Lambrides +38

JWST has revealed a population of compact and extremely red galaxies at $z > 4$ , which likely host active galactic nuclei (AGN). We present a sample of 434 ``little red dots'' (LRDs)…

astro-ph.GA2024★ 39 cited

The Structure of Massive Star-Forming Galaxies from JWST and ALMA: Dusty, High Redshift Disk Galaxies

Steven Gillman, Ian Smail, Bitten Gullberg +15

We present an analysis of the JWST NIRCam and MIRI morphological properties of 80 massive ( $lo g_{10} (M_{*} [M_{⊙}])$ =11.2 $\pm$ 0.1) dusty star-forming galaxies at $z$ $=$ 2.7$^{+…

COSMOS-Web: The Role of Galaxy Interactions and Disk Instabilities in Producing Starbursts at z<4

A. L. Faisst, L. Yang, M. Brinch +51

We study of the role of galaxy-galaxy interactions and disk instabilities in producing starburst activity in galaxies out to z = 4. For this, we use a sample of 387 galaxies with r…