Outputs (604)

Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks (2022)
Journal Article

We compare the two largest galaxy morphology catalogues, which separate early- and late-type galaxies at intermediate redshift. The two catalogues were built by applying supervised deep learning (convolutional neural networks, CNNs) to the Dark Energ... Read More about Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks.

Gravitational lensing effects of supermassive black holes in cluster environments (2022)
Journal Article

This study explores the gravitational lensing effects of supermassive black holes (SMBHs) in galaxy clusters. While the presence of central SMBHs in galaxies is firmly established, recent work from high-resolution simulations predict the existence of... Read More about Gravitational lensing effects of supermassive black holes in cluster environments.

ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background (2022)
Journal Article

Wide, deep, blind continuum surveys at submillimetre/millimetre (submm/mm) wavelengths are required to provide a full inventory of the dusty, distant Universe. However, conducting such surveys to the necessary depth, with sub-arcsec angular resolutio... Read More about ALMACAL IX: Multiband ALMA survey for dusty star-forming galaxies and the resolved fractions of the cosmic infrared background.

QWIND3: UV line-driven accretion disc wind models for AGN feedback (2022)
Journal Article

The ultraviolet (UV) bright accretion disc in active galactic nuclei (AGNs) should give rise to line driving, producing a powerful wind that may play an important role in AGN feedback as well as in producing structures like the broad-line region. How... Read More about QWIND3: UV line-driven accretion disc wind models for AGN feedback.

Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet (2022)
Journal Article

We use H I absorption along the lines-of-sight to the Q0107 quasar triplet in order to model potential disc and outflow structures in the circumgalactic medium of intervening galaxies at z ≲ 1, as well as the intergalactic medium on scales of up to a... Read More about Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet.

Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources (2022)
Journal Article

State-of-the-art techniques to identify Hα emission-line sources in narrow-band photometric surveys consist of searching for  Hα excess with reference to nearby objects in the sky (position-based selection). However, while this approach usually yield... Read More about Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources.

Reconstruction of the emissivity and flow for Doppler coherence imaging spectroscopy (CIS) on J-TEXT (2022)
Journal Article

Doppler coherence imaging spectroscopy (CIS) has been installed on J-TEXT tokamak to provide a wealth of information for carbon impurity ions (CIII). To obtain the local emissivity and flow from the line-integrated information measured by the camera,... Read More about Reconstruction of the emissivity and flow for Doppler coherence imaging spectroscopy (CIS) on J-TEXT.

JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results (2022)
Journal Article

We give an overview and describe the rationale, methods, and first results from NIRCam images of the JWST “Prime Extragalactic Areas for Reionization and Lensing Science” (PEARLS) project. PEARLS uses up to eight NIRCam filters to survey several prim... Read More about JWST PEARLS. Prime Extragalactic Areas for Reionization and Lensing Science: Project Overview and First Results.

Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence (2023)
Journal Article

We report what is believed to be the first example of fully continuous, 24-hour vertical monitoring of atmospheric optical turbulence. This is achieved using a novel instrument, the 24-hour Shack-Hartmann Image Motion Monitor (24hSHIMM). Optical turb... Read More about Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence.

The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information (2022)
Journal Article

A complete census of active galactic nuclei (AGNs) is a prerequisite for understanding the growth of supermassive black holes across cosmic time. A significant challenge towards this goal is the whereabouts of heavily obscured AGN that remain uncerta... Read More about The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information.

Multiple locations of near-infrared coronal lines in NGC 5548 (2022)
Journal Article

We present the first intensive study of the variability of the near-infrared coronal lines in an active galactic nucleus (AGN). We use data from a 1-yr-long spectroscopic monitoring campaign with roughly weekly cadence on NGC 5548 to study the variab... Read More about Multiple locations of near-infrared coronal lines in NGC 5548.

XGAPS: a sub-arcsec cross-match of galactic plane surveys (2022)
Journal Article

We present a sub-arcsec cross-match of Gaia Data Release 3 (DR3) against the INT Galactic Plane Surveys (IGAPS) and the United Kingdom Infrared Deep Sky Survey (UKIDSS). The resulting cross-match of Galactic Plane Surveys (XGAPS) provides additional... Read More about XGAPS: a sub-arcsec cross-match of galactic plane surveys.

A light-cone catalogue from the Millennium-XXL simulation: improved spatial interpolation and colour distributions for the DESI BGS (2022)
Journal Article

The use of realistic mock galaxy catalogues is essential in the preparation of large galaxy surveys, in order to test and validate theoretical models and to assess systematics. We present an updated version of the mock catalogue constructed from the... Read More about A light-cone catalogue from the Millennium-XXL simulation: improved spatial interpolation and colour distributions for the DESI BGS.

Warm molecular and ionized gas kinematics in the type-2 quasar J0945+1737 (2022)
Journal Article

We analyse Near-Infrared Integral Field Spectrograph (NIFS) observations of the type-2 quasar (QSO2) SDSS J094521.33+173753.2 to investigate its warm molecular and ionized gas kinematics. This QSO2 has a bolometric luminosity of 1045.7 erg s−1 and a... Read More about Warm molecular and ionized gas kinematics in the type-2 quasar J0945+1737.

The buildup of galaxies and their spheroids: The contributions of mergers, disc instabilities, and star formation (2022)
Journal Article

We use the GALFORM semi-analytical model of galaxy formation and the Planck-Millennium simulation to investigate the origins of stellar mass in galaxies and their spheroids. We compare the importance of mergers and disc instabilities, as well as the... Read More about The buildup of galaxies and their spheroids: The contributions of mergers, disc instabilities, and star formation.

What powers the wind from the black hole accretion disc in GRO J1655-40? (2022)
Journal Article

Black hole accretion discs can produce powerful outflowing plasma (disc winds), seen as blue-shifted absorption lines in stellar and supermassive systems. These winds in Quasars have an essential role in controlling galaxy formation across cosmic tim... Read More about What powers the wind from the black hole accretion disc in GRO J1655-40?.

Solving small-scale clustering problems in approximate light-cone mocks (2022)
Journal Article

Realistic light-cone mocks are important in the clustering analyses of large galaxy surveys. For simulations where only the snapshots are available, it is common to create approximate light-cones by joining together the snapshots in spherical shells.... Read More about Solving small-scale clustering problems in approximate light-cone mocks.

Detection of an unidentified soft X-ray emission feature in NGC 5548 (2022)
Journal Article

Context. NGC 5548 is an X-ray bright Seyfert 1 active galaxy. It exhibits a variety of spectroscopic features in the soft X-ray band, in particular including the absorption by the active galactic nucleus (AGN) outflows of a broad range of ionization... Read More about Detection of an unidentified soft X-ray emission feature in NGC 5548.

Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks (2022)
Journal Article

We present predictions, derived from the EAGLE ΛCDM cosmological hydrodynamical simulations, for the abundance and properties of galaxies expected to be detected at high redshift by the James Webb Space Telescope (JWST). We consider the galaxy popula... Read More about Observing EAGLE galaxies with JWST: predictions for Milky Way progenitors and their building blocks.

Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019 (2022)
Journal Article

Context. A growing number of transient X-ray obscuration events in type I active galactic nuclei suggest that our line of sight to the central engine is not always free. Multiple X-ray obscuration events were reported in the nearby Seyfert 1.5 galaxy... Read More about Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019.