Sofia Pasquini
A5038610137- Molecular Spectroscopy and Structure
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Galaxies: Formation, Evolution, Phenomena
- Advanced Chemical Physics Studies
- Astrophysics and Cosmic Phenomena
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Planetary Science and Exploration
- Astronomical Observations and Instrumentation
- Spacecraft and Cryogenic Technologies
- Adaptive optics and wavefront sensing
Western University
2023-2024
RIKEN
2024
Pioneer (Japan)
2024
Context . JWST has taken the sharpest and most sensitive infrared (IR) spectral imaging observations ever of Orion Bar photodis-sociation region (PDR), which is part nearest massive star-forming Nebula, often considered to be ‘prototypical’ strongly illuminated PDR. Aims We investigate impact radiative feedback from stars on their natal cloud focus transition H II atomic PDR – crossing ionisation front (IF) –, subsequent molecular dissociation (DF). Given prevalence PDRs in interstellar...
(Abridged) Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs found at 3.3, 6.2, 7.7, 8.6, and 11.2 $\mu$m. sensitive, highest-resolution spectral imaging data ever taken the prototypical PDR, Orion Bar, have been captured JWST. We provide an inventory in along with mid-IR template spectra from five distinct Bar: molecular atomic HII region. use JWST NIRSpec IFU MIRI MRS Bar...
Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict this FUV radiation produces photodissociation regions (PDRs) on the surfaces protoplanetary disks around affects planet formation within disks. We report James Webb Space Telescope and Atacama Large Millimeter Array observations a FUV-irradiated disk Orion Nebula. Emission lines detected from PDR; modeling their kinematics excitation...
Context . The James Webb Space Telescope (JWST) has captured the most detailed and sharpest infrared (IR) images ever taken of inner region Orion Nebula, nearest massive star formation region, a prototypical highly irradiated dense photo-dissociation (PDR). Aims We investigate fundamental interaction far-ultraviolet (FUV) photons with molecular clouds. transitions across ionization front (IF), dissociation (DF), cloud are studied at high-angular resolution. These relevant to understanding...
Context . Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs found at 3.3, 6.2, 7.7, 8.6, and 11.2 µm. sensitive, highest-resolution spectral imaging data ever taken the prototypical PDR, Orion Bar, have been captured JWST. These high-quality allow for an unprecedentedly detailed view AIBs. Aims We provide inventory in along with mid-IR template spectra from five distinct Bar:...
Context. Extraordinary observations of the Orion Bar by JWST have shown, for first time, incredible richness polycyclic aromatic hydrocarbon (PAH) emission bands and their variation on very small scales. These variations are result photochemical evolution PAH carrier. Aims. We aim to probe PAHs across key zones ideal photodissociation region (PDR) that is using unsupervised machine learning. Methods. used NIRSpec IFU MIRI MRS from Early Release Science programme PDRs4All (ID: 1288). levered...
Measuring broad emission-line widths in active galactic nuclei (AGN) is not straightforward owing to the complex nature of flux variability these systems. Line-width measurements become especially challenging when signal-to-noise low, profiles are narrower, or spectral resolution low. We conducted an extensive correlation analysis between from optical spectra Markarian 142 (Mrk 142; a narrow-line Seyfert galaxy) taken with Gemini North Telescope (Gemini) at 185.6+\-10.2 km/s and Lijiang...
Context. Mid-infrared emission features are important probes of the properties ionized gas and hot or warm molecular gas, which difficult to probe at other wavelengths. The Orion Bar photodissociation region (PDR) is a bright, nearby, frequently studied target containing large amounts under these conditions. Under “PDRs4All” Early Release Science Program for JWST, part was observed with MIRI integral field unit (IFU) spectroscopy, high-sensitivity IR spectroscopic images very high angular...
(Abridged) We investigate the impact of radiative feedback from massive stars on their natal cloud and focus transition HII region to atomic PDR (crossing ionisation front (IF)), subsequent molecular dissociation (DF)). use high-resolution near-IR integral field spectroscopic data NIRSpec JWST observe Orion Bar as part PDRs4All Early Release Science Program. The reveal a forest lines including, but not limited to, HeI, HI, CI recombination lines, ionic OI NI fluorescence Aromatic Infrared...
Abstract We performed a rigorous reverberation-mapping analysis of the broad-line region (BLR) in highly accreting ( L / Edd = 0.74–3.4) active galactic nucleus, Markarian 142 (Mrk 142), for first time using concurrent observations inner accretion disk and BLR to determine lag H β λ 4861 emission relative ultraviolet (UV) continuum variations. used data taken with Niel Gehrels Swift Observatory UVW 2 band, Las Cumbres Observatory, Dan Zowada Memorial Liverpool Telescope g as part broader Mrk...
(Abridged) Mid-infrared observations of photodissociation regions (PDRs) are dominated by strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs found at 3.3, 6.2, 7.7, 8.6, and 11.2 $μ$m. sensitive, highest-resolution spectral imaging data ever taken the prototypical PDR, Orion Bar, have been captured JWST. We provide an inventory in along with mid-IR template spectra from five distinct Bar: molecular atomic HII region. use JWST NIRSpec IFU MIRI MRS Bar...
Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict this FUV radiation produces photo-dissociation regions (PDRs) on the surfaces protoplanetary disks around impacting planet formation within disks. We report JWST and Atacama Large Millimetere Array observations a FUV-irradiated disk Orion Nebula. Emission lines detected from PDR; modelling their kinematics excitation allows us to...
The JWST has captured the most detailed and sharpest infrared images ever taken of inner region Orion Nebula, nearest massive star formation region, a prototypical highly irradiated dense photo-dissociation (PDR). We investigate fundamental interaction far-ultraviolet photons with molecular clouds. transitions across ionization front (IF), dissociation (DF), cloud are studied at high-angular resolution. These relevant to understanding effects radiative feedback from stars dominant physical...
Measuring broad emission-line widths in active galactic nuclei (AGN) is not straightforward owing to the complex nature of flux variability these systems. Line-width measurements become especially challenging when signal-to-noise low, profiles are narrower, or spectral resolution low. We conducted an extensive correlation analysis between from optical spectra Markarian 142 (Mrk 142; a narrow-line Seyfert galaxy) taken with Gemini North Telescope (Gemini) at 185.6+\-10.2 km/s and Lijiang...
We performed a rigorous reverberation-mapping analysis of the broad-line region (BLR) in highly accreting ($L/L_{\mathrm{Edd}}=0.74-3.4$) active galactic nucleus, Markarian 142 (Mrk 142), for first time using concurrent observations inner accretion disk and BLR to determine lag $H\beta$ $\mathrm{\lambda}$4861 emission relative ultraviolet (UV) continuum variations. used data taken with Niel Gehrels Swift Observatory UVW2 band, Las Cumbres Observatory, Dan Zowada Memorial Liverpool Telescope...
[Abridged] JWST observations of the Orion Bar have shown incredible richness PAH bands and their variation on small scales. We aim to probe photochemical evolution PAHs across key zones photodissociation region (PDR) that is using unsupervised machine learning. use NIRSpec MIRI IFU data from ERS Program PDRs4All. lever bisecting k-means clustering generate detailed spatial maps spectral variability in several wavelength regions. discuss variations cluster profiles connect them local physical...
Water is a key ingredient for the emergence of life as we know it. Yet, its destruction and reformation in space remains unprobed warm gas. Here, detect hydroxyl radical (OH) emission from planet-forming disk exposed to external far-ultraviolet (FUV) radiation with James Webb Space Telescope. The observations are confronted results quantum dynamical calculations. highly excited OH infrared rotational lines tell-tale signs H2O by FUV. ro-vibrational attributed chemical excitation via reaction...