123 citations · 1.4k across the 45 of their papers we have counts for
39 papers · 1 filter
Euclid Quick Data Release (Q1) Euclid spectroscopy of quasars. 2. Physical properties from spectral fitting
Euclid Collaboration, J. Calhau, G. Calderone +312
A substantial volume of spectroscopic data has become available with the Euclid Data Release (Q1), which represents a unique opportunity to study quasars (QSOs) in the Euclid Deep…
A gradient boosting and broadband approach to finding Lyman-α emitting galaxies beyond narrowband surveys
A. Vale, A. Paulino-Afonso, A. Humphrey +5
In this work, we test whether gradient-boosting algorithms, trained on broadband photometric data from traditional Lyman- emitting (LAE) surveys, can efficiently and accurately…
Through the fog: a complementary optical galaxy classification scheme for 'intermediate' redshifts
Duarte Muñoz Santos, Cirino Pappalardo, Henrique Miranda +10
Understanding galaxy classification depends on our interpretation of their spectra. To date, the hydrogen Balmer lines remain the most consistent way to classify galaxies, but at '…
Exploring the physical properties of Type II Quasar candidates at intermediate redshifts with CIGALE
P. A. C. Cunha, A. Humphrey, J. Brinchmann +4
Active Galactic Nuclei (AGN) significantly influence galaxy evolution. Specific sources such as obscured AGNs, especially Type II quasars (QSO2), still remain understudied. We char…
Euclid Quick Data Release (Q1). Active galactic nuclei identification using diffusion-based inpainting of Euclid VIS images
Euclid Collaboration, G. Stevens, S. Fotopoulou +271
Light emission from galaxies exhibit diverse brightness profiles, influenced by factors such as galaxy type, structural features and interactions with other galaxies. Elliptical ga…
Euclid Quick Data Release (Q1). Exploring galaxy morphology across cosmic time through Sersic fits
Euclid Collaboration, L. Quilley, I. Damjanov +333
We present the results of the single-component Sérsic profile fitting for the magnitude-limited sample of \IE galaxies within the 63.1 deg area of the Euclid Quick Data Re…
Compact Size, High SFR: Defining Morphological Features of Ly-Emitters
Keunho Kim, Anahita Alavi, Christopher Snapp-Kolas +7
The mechanisms of Ly photon escape are key to understanding galaxy evolution and cosmic reionization, yet remain poorly understood. We investigate the UV-continuum sizes of 23 L…
Importance of modelling the nebular continuum in galaxy spectra
Henrique Miranda, Ciro Pappalardo, José Afonso +7
The neglect of modelling both stellar and nebular emission significantly affects the derived physical properties of galaxies, particularly those with high star formation rates. Whi…
Euclid: The Early Release Observations Lens Search Experiment
J. A. Acevedo Barroso, C. M. O'Riordan, B. Clément +206
We investigated the ability of the Euclid telescope to detect galaxy-scale gravitational lenses. To do so, we performed a systematic visual inspection of the Eucl…
Selection of powerful radio galaxies with machine learning
R. Carvajal, I. Matute, J. Afonso +12
We developed and trained a pipeline of three machine learning (ML) models than can predict which sources are more likely to be an AGN and to be detected in specific radio surveys.…
Improving machine learning-derived photometric redshifts and physical property estimates using unlabelled observations
A. Humphrey, P. A. C. Cunha, A. Paulino-Afonso +5
In the era of huge astronomical surveys, machine learning offers promising solutions for the efficient estimation of galaxy properties. The traditional, `supervised' paradigm for t…
An investigation of the star-forming main sequence considering the nebular continuum emission at low-z
Henrique Miranda, Ciro Pappalardo, Polychronis Papaderos +7
The code FADO is the first publicly available population spectral synthesis tool that treats the contribution from ionised gas to the observed emission self-consistently. We study…
A Sample of Dust Attenuation Laws for DES Supernova Host Galaxies
J. Duarte, S. González-Gaitán, A. Mourao +58
Type Ia supernovae (SNe Ia) are useful distance indicators in cosmology, provided their luminosity is standardized by applying empirical corrections based on light-curve properties…
Revisiting stellar properties of star-forming galaxies with stellar and nebular spectral modelling
Leandro S. M. Cardoso, Jean Michel Gomes, Polychronis Papaderos +5
Spectral synthesis is a powerful tool for interpreting the physical properties of galaxies by decomposing their spectral energy distributions into the main luminosity contributors…
z~2-9 Galaxies magnified by the Hubble Frontier Field Clusters I: Source Selection and Surface Density-Magnification Constraints from >2500 galaxies
R. J. Bouwens, G. Illingworth, R. S. Ellis +4
We assemble a large comprehensive sample of 2534 z~2, 3, 4, 5, 6, 7, 8, and 9 galaxies lensed by the six clusters from the Hubble Frontier Fields (HFF) program. Making use of the a…
The LEGA-C of nature and nurture in stellar populations of galaxies at z~0.6-1.0: D4000 and H-delta reveal different assembly histories for quiescent galaxies in different environments
David Sobral, Arjen van der Wel, Rachel Bezanson +11
Galaxy evolution is driven by a variety of physical processes which are predicted to proceed at different rates for different dark matter haloes and environments across cosmic time…
The Synchrony of Production & Escape: Half the Bright Ly Emitters at have Lyman Continuum Escape Fractions
Rohan P. Naidu, Jorryt Matthee, Pascal A. Oesch +14
The ionizing photon escape fraction (LyC ) of star-forming galaxies is the single greatest unknown in the reionization budget. Stochastic sightline effects prohibit t…
(Re)Solving Reionization with Lyα: How Bright Lyα Emitters account for the Cosmic Ionizing Background
Jorryt Matthee, Rohan P. Naidu, Gabriele Pezzulli +12
The cosmic ionizing emissivity from star-forming galaxies has long been anchored to UV luminosity functions. Here we introduce an emissivity framework based on Ly emitters (LAEs…
The evolution of the UV luminosity and stellar mass functions of Lyman-alpha emitters from z~2 to z~6
Sérgio Santos, David Sobral, Josh Butterworth +7
We measure the evolution of the rest-frame UV luminosity function (LF) and the stellar mass function (SMF) of Lyman-alpha (Lya) emitters (LAEs) from z~2 to z~6 by exploring ~4000 L…
The X-SHOOTER Lyman- survey at z=2 (XLS-z2) I: What makes a galaxy a Lyman- emitter?
Jorryt Matthee, David Sobral, Matthew Hayes +9
We present the first results from the X-SHOOTER Lyman- survey at (XLS-). XLS- is a deep spectroscopic survey of 35 Lyman- emitters (LAEs) utilising …
The VIMOS Ultra-Deep Survey: the Ly emission line morphology at
B. Ribeiro, O. Le Fèvre, A. Paulino-Afonso +20
The Lyman- (Ly) emission line has been ubiquitously used to confirm and study high redshift galaxies. We report on the line morphology as seen in the 2D spectra from the VIMO…
Spectroscopic Confirmation of a Coma Cluster Progenitor at z ~ 2.2
Behnam Darvish, Nick Z. Scoville, Christopher Martin +17
We report the spectroscopic confirmation of a new protocluster in the COSMOS field at 2.2, COSMOS Cluster 2.2 (CC2.2), originally identified as an overdensity of narrowb…
Structural analysis of massive galaxies using HST deep imaging at z < 0.5
Sandra N. dos Reis, Fernando Buitrago, Polychronis Papaderos +11
Taking advantage of HST CANDELS data, we analyze the lowest redshift (z<0.5) massive galaxies in order to disentangle their structural constituents and study possible faint non-axi…
VIS3COS: III. environmental effects on the star formation histories of galaxies at z~0.8 seen in [OII], H, and Dn4000
Ana Paulino-Afonso, David Sobral, Behnam Darvish +5
[ABRIDGED] We present spectroscopic observations of 466 galaxies in and around a superstructure at targeted by the VIMOS Spectroscopic Survey of a Supercluster in the C…