A5043841089- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Solar and Space Plasma Dynamics
- Satellite Communication Systems
- Adaptive optics and wavefront sensing
Sapienza University of Rome
2022-2023
Astronomical Observatory of Rome
2022-2023
University of Rome Tor Vergata
2022-2023
The University of Texas at Austin
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2023
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...
Detecting the first generation of stars, Population III (PopIII), has been a long-standing goal in astrophysics, yet they remain elusive even JWST era. Here we present novel NIRCam-based selection method for PopIII galaxies, and carefully validate it through completeness contamination simulations. We systematically search ~500 arcmin$^{2}$ across legacy fields candidates, including GLIMPSE which, assisted by gravitational lensing, produced JWST's deepest NIRCam imaging thus far. discover one...
ABSTRACT With the launch of JWST and other scheduled missions aimed at probing distant universe, we are entering a new promising era for high-z astronomy. One our main goals is detection first population stars (Population III or Pop stars), models suggest that star formation allowed well into Epoch Reionization (EoR), rendering this an attainable achievement. In paper, focus on chance detecting massive IIIs moment their death as Pair-Instability Supernovae (PISNe). We estimate probability...
Abstract The gas surrounding first-generation (Population III, hereafter Pop III) stars is expected to emit a distinct signature in the form of He ii recombination line at 1640 Å(He λ 1640). Here we explore challenges and opportunities identifying this elusive stellar population via M ⋆ > 10 7.5 ⊙ galaxies during Epoch Reionization ( z ≃ 6–10), using JWST/NIRSpec. With aim mind, combine cosmological dustyGadget simulations with analytical modeling intrinsic emission. While tentative...
The gas surrounding first-generation (Pop III) stars is expected to emit a distinct signature in the form of HeII recombination line at 1640 \r{A} (HeII$\lambda$1640). Here we explore challenges and opportunities identifying this elusive stellar population via HeII$\lambda$1640 $M_\star > 10^{7.5} ~ \mathrm{M_\odot}$ galaxies during Epoch Reionization (EoR, $z \simeq 6 - 10$), using JWST/NIRSpec. With aim mind, combine cosmological dustyGadget simulations with analytical modeling intrinsic...
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 $z > 4$....
With the launch of JWST and other scheduled missions aimed at probing distant Universe, we are entering a new promising era for high-$z$ astronomy. One our main goals is detection first population stars (Population III or Pop stars), models suggest that star formation allowed well into Epoch Reionization (EoR), rendering this an attainable achievement. In paper, focus on chance detecting massive IIIs moment their death as Pair-Instability Supernovae (PISNe). We estimate probability...