A5062253536- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Atmospheric and Environmental Gas Dynamics
- Cardiac Imaging and Diagnostics
- Astrophysics and Star Formation Studies
- Scientific Research and Discoveries
- Media, Religion, Digital Communication
- Misinformation and Its Impacts
- Advanced Measurement and Metrology Techniques
- Medical Imaging Techniques and Applications
Liverpool John Moores University
2025
University of Manchester
2023-2024
Abstract We present an analysis of the quenching star formation in massive galaxies ( M * > 10 9.5 ⊙ ) within first 0.5–3 Gyr Universe’s history utilizing JWST-CEERS data. utilize a combination advanced statistical methods to accurately constrain intrinsic dependence multidimensional and intercorrelated parameter space. Specifically, we apply random forest classification, area statistics, partial correlation First, identify key testable predictions from two state-of-the-art cosmological...
ABSTRACT We present the results of a size and structural analysis 1395 galaxies at 0.5 ≤ z ≲ 8 with stellar masses log (M*/M⊙)> 9.5 within James Webb Space Telescope Public CEERS field that overlaps Hubble Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey EGS observations. use GALFIT to fit single Sérsic models rest-frame optical profile our galaxies, which is mass-selected sample complete redshift mass limit. Our primary result fixed wavelength mass, get progressively...
We present an early analysis on the search for high redshift galaxies using deepest public JWST imaging to date, NGDEEP field. This data consists of 6-band NIRCam Hubble Ultra Deep Field-Par2, covering a total area 6.3 arcmin$^{2}$. Based our initial reduction first half this survey, we reach 5$\sigma$ depths up mag = 29.5--29.9 between $1-5$ um. Such unprecedented opportunity begin exploring Universe with JWST. As such, find in field by examining spectral energy distribution these systems...
We present an analysis of a sample robust high redshift galaxies selected photometrically from the `blank' fields Prime Extragalactic Areas for Reionization Science (PEARLS) survey and Early Release Observations (ERO) data James Webb Space Telescope (JWST) with aim selecting candidate active galactic nuclei (AGN). Sources were identified parent using threefold selection procedure, which includes spectral energy distribution (SED) fitting to identify sources that are best fitted by AGN SED...
Abstract We utilize deep JWST Near Infrared Camera (NIRCam) observations for the first direct constraints on Galaxy Stellar Mass Function (GSMF) at z > 10. Our EPOCHS v1 sample includes 1120 galaxy candidates 6.5 < 13.5 taken from a consistent reduction and analysis of publicly available NIRCam data covering Prime Extragalactic Areas Reionization Science, CEERS, GLASS, JADES GOOD-S, NGDEEP, SMACS0723 surveys, totaling 187 arcmin 2 . investigate impact spectral energy distribution...
Abstract We present measurements of the dust attenuation curves 12 massive (9 &lt; log (M⋆/M⊙) 10) Lyman-break galaxies at z = 6.5 − 7.7 derived from James Webb Space Telescope (JWST) NIRSpec integral field unit (IFU) spectroscopy. The are drawn Atacama Large Millimeter/submillimeter Array (ALMA) Reionization Era Bright Emission Line Survey (REBELS) large program. were obtained by fitting spectral energy distribution (SED) models with a flexible curve to full galaxy spectra over observed...
ABSTRACT We present the analysis of stellar population and star formation history 181 MIRI selected galaxies at z = 0 − 3.5 in massive galaxy cluster field SMACS J0723.3–7327, commonly referred to as SMACS0723, using JWST Mid-Infrared Instrument (MIRI). combine data with Near Infrared Camera (NIRCam) catalogue, conjunction Hubble Space Telescope (HST) WFC3/IR ACS imaging. find that bands capture PAH features dust emission, significantly enhancing accuracy photometric redshift measurements...
We present measurements of the dust attenuation curves 12 massive ($9~<~\log$($M_{\star}/{M}_{\odot})$ $<~10$) Lyman-break galaxies at $z=6.5-7.7$ derived from James Webb Space Telescope (JWST) NIRSpec integral field unit (IFU) spectroscopy. The are drawn Atacama Large Millimeter/submillimeter Array (ALMA) Reionization Era Bright Emission Line Survey (REBELS) large program. were obtained by fitting spectral energy distribution (SED) models with a flexible law to full galaxy spectra over...
Metallicity is a crucial tracer of galaxy evolution, providing insights into gas accretion, star formation, and feedback. At high redshift, these processes reveal how early galaxies assembled enriched their interstellar medium. In this work, we present rest-frame optical spectroscopy 12 massive ($\log(M_*/\mathrm{M_{\odot}})>9$) at $z\sim 6$-$8$ from the REBELS ALMA large program, observed with JWST NIRSpec/IFU in prism mode. These observations span emission lines [OII]$\lambda$3727,9 to...
Abstract We present in this paper the discovery, properties, and a catalog of 1165 high-redshift 6.5 < z 18 galaxies found deep JWST NIRCam imaging from GTO PEARLS survey combined with data public fields. describe our bespoke homogeneous reduction process analysis these areas including NEP, CEERS, GLASS, NGDEEP, JADES, ERO SMACS-0723 fields over 214 arcmin 2 imaged to depths ∼30 mag. rigorous methods for identifying galaxies, involving use Lyman-break strength, detection significance...
ABSTRACT We measure the broad impact of galaxy structure on formation by examining ongoing star and integrated history as revealed through stellar masses galaxies at z &lt; 7 based JWST CEERS data from Extended Groth Strip (EGS). Using morphological catalog 3965 visually classified Ferreira et al. (2023), we investigate evolution stars, when they form, a function type well passive starburst spectral energy distributions. Although disc dominate structures 7, find that these discs are in...
We utilize deep JWST NIRCam observations for the first direct constraints on Galaxy Stellar Mass Function (GSMF) at z>10. Our EPOCHS v1 sample includes 1120 galaxy candidates 6.5<z<13.5 taken from a consistent reduction and analysis of publicly available data covering PEARLS, CEERS, GLASS, JADES GOOD-S, NGDEEP, SMACS0723 surveys, totalling 187 arcmin2. investigate impact SED fitting methods, assumed star formation histories (SFH), dust laws, priors masses resultant GSMF. Whilst our fiducial...
ABSTRACT In this paper, we discuss measurements of the stellar population and star-forming properties for 43 spectroscopically confirmed publicly available high-redshift z &gt; 7 JWST galaxies in JADES CEERS observational programs. We carry out a thorough study investigating relationship between spectroscopic features photometrically derived ones, including from spectral energy distribution (SED) fitting models, as well morphological structural properties. find that star formation rates...
We present an analysis of rest-frame UV continuum slopes, $\beta$, using a sample 1011 galaxies at $6.5<z<13$ from the EPOCHS photometric collated GTO PEARLS and public ERS/GTO/GO (JADES, CEERS, NGDEEP, GLASS) JWST NIRCam imaging across $178.9~\mathrm{arcmin}^2$ unmasked blank sky. correct our slopes for error coupling bias $200,000$ power law SEDs each $\beta=\{-1,-1.5,-2,-2.5,-3\}$ in field, finding biases as large $\Delta\beta\simeq-0.55$ lowest SNR sample. Additionally, we simulate...
We present the analysis of stellar population and star formation history 181 MIRI selected galaxies at redshift 0-3.5 in massive galaxy cluster field SMACS J0723.3-7327, commonly referred to as SMACS0723, using James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI). combine data with JWST Near Infrared Camera (NIRCam) catalogue, conjunction Hubble (HST) WFC3/IR ACS imaging. find that bands capture PAH features dust emission, significantly enhancing accuracy photometric measurements...
We measure the broad impact of galaxy structure on formation by examining ongoing star and integrated history as revealed through stellar masses galaxies at $z < 7$ based JWST CEERS data from Extended Groth Strip (EGS). Using morphological catalog 3965 visually classified Ferreira et al. (2023), we investigate evolution stars, when they form, a function type well passive starburst spectral energy distributions. Although disk dominate structures 7$, find that these disks are in general either...
We present in this paper the discovery, properties, and a catalog of 1165 high redshift $6.5 < z 18$ galaxies found deep JWST NIRCam imaging from GTO PEARLS survey combined with data public fields. describe our bespoke homogeneous reduction process analysis these areas including NEP, CEERS, GLASS, NGDEEP, JADES, ERO SMACS-0723 fields over 214 arcmin$^{2}$ imaged to depths $\sim 30$ mag. rigorous methods for identifying galaxies, involving use Lyman-break strength, detection significance...
In this paper, we discuss measurements of the stellar population and star forming properties for 43 spectroscopically confirmed publicly available high-redshift $z > 7$ JWST galaxies in JADES CEERS observational programs. We carry out a thorough study investigating relationship between spectroscopic features photometrically derived ones, including from spectral energy distribution (SED) fitting models, as well morphological structural properties. find that formation rates (SFRs) measured...
We present an analysis of the quenching star formation in massive galaxies ($M_* > 10^{9.5} M_\odot$) within first 0.5 - 3 Gyr Universe's history utilizing JWST-CEERS data. utilize a combination advanced statistical methods to accurately constrain intrinsic dependence multi-dimensional and inter-correlated parameter space. Specifically, we apply Random Forest (RF) classification, area statistics, partial correlation First, identify key testable predictions from two state-of-the-art...
We present an analysis of a sample robust high redshift galaxies selected photometrically from the `blank' fields Prime Extragalactic Areas for Reionization Science (PEARLS) survey and Early Release Observations (ERO) data James Webb Space Telescope (JWST) with aim selecting candidate active galactic nuclei (AGN). Sources were identified parent using threefold selection procedure, which includes spectral energy distribution (SED) fitting to identify sources that are best fitted by AGN SED...