R. C. Arango-Toro
A5083696665- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Scientific Research and Discoveries
- Methane Hydrates and Related Phenomena
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
Laboratoire d’Astrophysique de Marseille
2024
Château Gombert
2024
Aix-Marseille Université
2023-2024
Centre National de la Recherche Scientifique
2023-2024
Abstract We present the survey design, implementation, and outlook for COSMOS-Web, a 255 hr treasury program conducted by James Webb Space Telescope in its first cycle of observations. COSMOS-Web is contiguous 0.54 deg 2 NIRCam imaging four filters (F115W, F150W, F277W, F444W) that will reach 5 σ point-source depths ranging ∼27.5–28.2 mag. In parallel, we obtain 0.19 MIRI one filter (F770W) reaching ∼25.3–26.0 build on rich heritage multiwavelength observations data products available COSMOS...
Star formation histories (SFHs) of early galaxies (6 < z 12) have been found to be highly stochastic in both simulations and observations, while at ≲6 the presence a main sequence (MS) star-forming implies secular processes play. In this work we characterise SFH variability as function their stellar mass redshift. We used JADES public catalogue derived physical properties well SFHs using spectral energy distribution modelling code CIGALE . To end, implemented non-parametric with flat...
We study the stellar mass assembly of galaxies via function (SMF) and coevolution with dark matter halos abundance matching in largest redshift range to date, $0.2<z<12$. used $0.53 deg ^2$ imaged by JWST from COSMOS-Web survey, combination ancillary imaging over 30 photometric bands, select highly complete samples (down log$ ⋆ /M_ ⊙ = 7.5-8.8$) 15 bins. Our results show that normalization SMF monotonically decreases z=0.2 z=12 strong mass-dependent evolution. At z>5, we find...
Abstract We study of the role galaxy–galaxy interactions and disk instabilities in producing starburst activity galaxies out to z = 4. For this, we use a sample 387 with robust total star formation rate measurements from Herschel, gas masses Atacama Large Millimeter/submillimeter Array, stellar redshifts multiband photometry, JWST/NIRCam rest-frame optical imaging. Using mass-controlled samples, find an increased fraction interacting regime at all This increase correlates efficiency (SFE)...
Context. Faint, star-forming galaxies are likely to play a dominant role in cosmic reionisation. Great strides have been made recent years characterise these populations at high redshifts ( z > 3). Now, for the first time, with JWST photometry beyond 1 μm rest frame, we can derive accurate stellar masses and position on galaxy main sequence. Aims. We seek assess place of 96 individual Lyman- α emitters (LAEs) selected behind A2744 lensing cluster MUSE IFU spectroscopy also compare derived...
Radio used as a star formation rate (SFR) tracer presents enormous advantages by being unaffected dust and radio sources pinpointed at the sub-arc-second level. The interpretation of low frequency 1.4 GHz luminosity is hampered difficulty in modeling cosmic ray paths interstellar medium, their interactions with magnetic field. In this work, we compare SFR derived from observations, ones spectral energy distribution (SED) modeling. We aim better understand behavior tracer, specific emphasis...
Galaxy groups with $M_{tot} \lesssim 10^{14}$ $M_\odot$ and up to a few tens of members are the most common galaxy environment, marking transition between field massive clusters. Identifying plays crucial role in understanding structure formation evolution. Modern deep surveys allow us build well-characterized samples regime where structures were taking shape. We aimed largest catalog date over COSMOS-Web effective area 0.45 deg$^2$, leveraging high quality data new photometric resulted from...
The stellar mass-star formation rate (SFRM) plane is an essential diagnostic to separate galaxy populations. However, we still lack a clear picture of how galaxies move within this along cosmic time. This study aims provide observational description migrations in the SFRM based on reconstructed star histories (SFH) sample at redshift z<4. Ultimately, seeks insight into physical processes driving formation. We used data from COSMOS field, which provides extensive multi-wavelength coverage....
We report the spectroscopic confirmation of background source most distant Einstein ring known to date, COSMOS-Web ring. This system consists a complete at z=5.1, which is lensed by massive early-type galaxy z∼2. The redshift z=5.1043±0.0004 unambiguously identified with our NOEMA and Keck/MOSFIRE spectroscopy; observations reveal CO(4-3) CO(5-4) lines $>8,σ$, MOSFIRE data detect O ii ∼ 6,σ. Using multiwavelength photometry spanning near-infrared radio bands, we find that dust-obscured...
We propose a novel method for reconstructing the full posterior distribution of star formation histories (SFHs) galaxies from broad-band photometry. Our combines simulation-based inference (SBI) framework using neural network trained with SFHs and photometry Horizon-AGN hydrodynamical cosmological simulation. applied our technique in COSMOS Treasury field only COSMOS2020 redshift range $0<z<3$. The is able to accurately estimate SFH quantify Bayesian uncertainty on simulated data, an...
We present the survey design, implementation, and outlook for COSMOS-Web, a 255 hour treasury program conducted by James Webb Space Telescope in its first cycle of observations. COSMOS-Web is contiguous 0.54 deg$^2$ NIRCam imaging four filters (F115W, F150W, F277W, F444W) that will reach 5$\sigma$ point source depths ranging $\sim$27.5-28.2 magnitudes. In parallel, we obtain 0.19 MIRI one filter (F770W) reaching $\sim$25.3-26.0 build on rich heritage multiwavelength observations data...
Star formation histories (SFH) of early (6$<z<$12) galaxies have been found to be highly stochastic in both simulations and observations, while at $z\lesssim$6 the presence a main sequence (MS) star-forming imply secular processes play. In this work, we aim characterising SFH variability as function their stellar mass redshift. We use JADES public catalogue derive physical properties well using spectral energy distribution modelling code CIGALE. To aim, implement non-parametric with flat...
The stellar mass-star formation rate (M$_\star$ - SFR) plane is essential for distinguishing galaxy populations, but how galaxies move within this over cosmic time remains unclear. This study aims to describe migrations in the M$_\star$ SFR by reconstructing star histories (SFHs) a sample of out redshift $z < 4$. provides insights into physical processes driving formation. We use data from COSMOS field, selecting 299131 at 4$ with COSMOS-Web NIRCam (m$_\mathrm{F444W} 27$) 0.54 deg$^2$. Using...
We study the stellar mass function (SMF) and co-evolution with dark matter halos via abundance matching in largest redshift range to date $0.2<z<12$ $0.53 \, {\rm deg}^2$ imaged by JWST from COSMOS-Web survey. At $z>5$, we find increased abundances of massive (log$\, M_{\star}/M_{\odot}>10.5$) implying integrated star formation efficiencies (SFE) $\epsilon_{\star}\equiv M_{\star}\, f_{\rm b}^{-1} M_{\rm halo}^{-1} \gtrsim 0.5$. a flattening SMF at high-mass end that is better described...
We propose a novel method to reconstruct the full posterior distribution of star formation histories (SFHs) galaxies from broad-band photometry. Our combines simulation-based inference (SBI) using neural network trained with SFHs and photometry {\sc Horizon-AGN} hydrodynamical cosmological simulation. apply it COSMOS2020 at redshift $0<z<3$. are able accurately estimate SFH quantify uncertainty on simulated data, an unbiased mean well calibrated credible intervals. in broad agreement...
Faint, star-forming galaxies likely play a dominant role in cosmic reionisation. Strides have been made recent years to characterise these populations at high redshifts ($z>3$). Now for the first time, with JWST photometry beyond 1$\,\mu m$ rest frame, we can derive accurate stellar masses and position on galaxy main sequence. We seek assess place of 96 individual Lyman-alpha emitters (LAEs) selected behind A2744 lensing cluster MUSE spectroscopy also compare derived luminosities equivalent...
We study of the role galaxy-galaxy interactions and disk instabilities in producing starburst activity galaxies out to z=4. For this, we use a sample 387 with robust total star formation rate measurements from Herschel, gas masses ALMA, stellar redshifts multi-band photometry, JWST/NIRCam rest-frame optical imaging. Using mass-controlled samples, find an increased fraction interacting regime at all This increase correlates efficiency (SFE), but not fraction. However, correlation is weak (and...