A5000316892- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Statistical and numerical algorithms
- Relativity and Gravitational Theory
- Computational Physics and Python Applications
- Astrophysical Phenomena and Observations
- Pharmacological Effects and Assays
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2023-2024
Sapienza University of Rome
2022-2024
Astronomical Observatory of Rome
2022-2024
European Southern Observatory
2022
ABSTRACT The increasing number of distant galaxies observed with ALMA by the ALPINE and REBELS surveys early release observations JWST promise to revolutionize our understanding cosmic star formation assembly normal, dusty galaxies. Here, we introduce a new suite cosmological simulations performed dustyGadget interpret high-redshift data. We investigate comoving history, stellar mass density, galaxy scaling relations such as main sequence, stellar-to-halo mass, dust-to-stellar at z >...
ABSTRACT Despite extensive search efforts, direct observations of the first [Population III (Pop III)] stars have not yet succeeded. Theoretical studies suggested that late Pop star formation is still possible in pristine clouds high-mass galaxies, co-existing with II stars, down to epoch reionization. Here, we re-assess this finding by exploring six 50 h−1 cMpc simulations performed hydrodynamical code dustyGadget. We find (∼10−3.4–10−3.2 M⊙ yr−1 cMpc−3) occurring z ∼ 6–8, i.e. well within...
We present the results of a ~60-hr observational campaign with ALMA targeting spectroscopically confirmed and lensed sub-$L^\star$ galaxy at z=6.07, identified during Lensing Cluster Survey (ALCS). sample dust continuum emission from rest frame 90 to 370 $\mu$m six different frequencies set constraining upper limits on molecular gas line content via CO(7-6) [CI](2-1) for two images $\mu\gtrsim20$. Complementing these sub-mm observations deep optical near-IR photometry spectroscopy JWST, we...
Recent observations suggest a significant and rapid buildup of dust in galaxies at high redshift (z>4); this presents new challenges to our understanding galaxy formation the early Universe. Although physics production destruction galaxy's interstellar medium (ISM) is improving, investigating baryonic processes universe remains complex task owing inherent degeneracies cosmological simulations chemical evolution models. In work we characterized 98 z∼5 star-forming observed as part ALMA...
Compact, star-forming galaxies with high star formation rate surface densities ($\Sigma_{\text{SFR}}$) are often efficient Lyman continuum (LyC) emitters at $z\leq 4.5$, likely as intense stellar feedback creates low-density channels that allow photons to escape. Irregular or disturbed morphologies, such those resulting from mergers, can also facilitate LyC escape by creating anisotropic gas distributions. We investigate the influence of galaxy morphology on production and redshifts $5 \leq...
Determining when the first galaxies formed remains an outstanding goal of modern observational astronomy. Theory and current stellar population models imply that at least $z = 14-15$. But to date, only one galaxy > 13$ (GS-z13-0) has been spectroscopically confirmed.. The `HD1' was recently proposed be a z=13.27 based on its potential Lyman break tentative [O III] 88 {\mu}m detection with ALMA. We hereby aim test this scenario new ALMA Band 4, DDT observations what would [C II] 158 emission,...
Context. Galaxies evolve through a dynamic exchange of material with their immediate surrounding environment, the so-called circumgalactic medium (CGM). Understanding physics gas flows and nature CGM is fundamental to studying galaxy evolution, especially at 4 ≤ z 6 (i.e., after Epoch Reionization) when galaxies rapidly assembled masses reached chemical maturity. Galactic outflows are predicted enrich metals, although it has also been suggested that stripping in systems undergoing major...
Dwarf galaxies hold the key to crucial frontiers of astrophysics, however, their faintness renders spectroscopy challenging. Here we present JWST Cycle 2 survey, All Little Things (ALT, PID 3516), which is designed seek late-forming Pop III stars and drivers reionization at $z\sim6-7$. ALT has acquired deepest NIRCam grism yet (7-27 hr), JWST's most sensitive wavelengths (3-4 $\mu$m), covering powerful lensing cluster Abell 2744. Over same 30 arcmin$^2$, ALT's ultra-deep F070W+F090W imaging...
Despite extensive search efforts, direct observations of the first (Pop III) stars have not yet succeeded. Theoretical studies suggested that late Pop III star formation is still possible in pristine clouds high-mass galaxies, coexisting with II stars, down to Epoch Reionization (EoR). Here we reassess this finding by exploring six $50h^{-1} ~$cMpc simulations performed hydrodynamical code dustyGadget. We find ($\sim 10^{-3.4} - 10^{-3.2} ~ \mathrm{M_\odot yr^{-1} cMpc^{-3}}$) occurring $z...
The increasing number of distant galaxies observed with ALMA by the ALPINE and REBELS surveys early release observations JWST promise to revolutionize our understanding cosmic star formation assembly normal, dusty galaxies. Here we introduce a new suite cosmological simulations performed \texttt{dustyGadget} interpret high-redshift data. We investigate comoving history, stellar mass density galaxy scaling relations such as main sequence, stellar-to-halo dust-to-stellar at $z > 4$....
Determining when the first galaxies formed remains an outstanding goal of modern observational astronomy. Theory and current stellar population models imply that at least $z = 14-15$. But to date, only one galaxy > 13$ (GS-z13-0) has been spectroscopically confirmed.. The `HD1' was recently proposed be a z=13.27 based on its potential Lyman break tentative [O III] 88 μm detection with ALMA. We hereby aim test this scenario new ALMA Band 4, DDT observations what would [C II] 158 emission,...
Galaxies evolve through a dynamic exchange of material with their immediate surrounding environment, the circumgalactic medium (CGM). Understanding physics gas flows and nature CGM is thus fundamental to studying galaxy evolution, especially at $4 \leq z 6$ when galaxies rapidly assembled masses reached chemical maturity. Galactic outflows are predicted enrich metals, although stripping in systems undergoing major merger has also been suggested play role. In this work, we explore metal...
Recent observations reveal a rapid dust build-up in high-redshift galaxies (z > 4), challenging current models of galaxy formation. While our understanding production and destruction the interstellar medium (ISM) is advancing, probing baryonic processes early Universe remains complex task. We characterize evolution 98 z~5 star-forming observed as part ALPINE survey by constraining physical underpinning gas production, consumption, their ISM. make use chemical to simultaneously reproduce...
JWST observations have unveiled faint active galactic nuclei (AGN) at high-redshift that provide insights on the formation of supermassive black holes (SMBHs) and their coevolution with galaxies. However, disentangling stellar from AGN light in these sources is challenging. Here, we use an empirical approach to infer average mass 6 broad line (BL) Halpha emitters z = 4 - 5 BH masses ~ (4 15)x10^6 Msun, a method independent spectral energy distribution (SED). We deep JWST/NIRcam grism survey...