All Outputs (81)

Identifying Strong Lenses with Unsupervised Machine Learning using Convolutional Autoencoder (2020)
Journal Article

In this paper we develop a new unsupervised machine learning technique comprised of a feature extractor, a convolutional autoencoder (CAE), and a clustering algorithm consisting of a Bayesian Gaussian mixture model (BGM). We apply this technique to v... Read More about Identifying Strong Lenses with Unsupervised Machine Learning using Convolutional Autoencoder.

Erratum: The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations (2020)
Journal Article

NOEMA redshift measurements of bright Herschel galaxies (2019)
Journal Article

Using the IRAM NOrthern Extended Millimeter Array (NOEMA), we conducted a program to measure redshifts for 13 bright galaxies detected in the Herschel Astrophysical Large Area Survey (H-ATLAS) with S500 _m _ 80 mJy. We report reliable spectroscopic r... Read More about NOEMA redshift measurements of bright Herschel galaxies.

Exploring Reionization-era Quasars. III. Discovery of 16 Quasars at 6.4 ? z ? 6.9 with DESI Legacy Imaging Surveys and the UKIRT Hemisphere Survey and Quasar Luminosity Function at z ? 6.7 (2019)
Journal Article

This is the third paper in a series aimed at finding reionization-era quasars with the combination of DESI Legacy imaging Surveys (DELS), the Pan-STARRS1 (PS1) Survey, and near-infrared imaging surveys, such as the UKIRT Hemisphere Survey (UHS), as w... Read More about Exploring Reionization-era Quasars. III. Discovery of 16 Quasars at 6.4 ? z ? 6.9 with DESI Legacy Imaging Surveys and the UKIRT Hemisphere Survey and Quasar Luminosity Function at z ? 6.7.

Spitzer Catalog of Herschel-selected Ultrared Dusty Star-forming Galaxies (2019)
Journal Article

The largest Herschel extragalactic surveys, H-ATLAS and HerMES, have selected a sample of “ultrared” dusty, star-forming galaxies (DSFGs) with rising SPIRE flux densities (S500 > S350 > S250, so-called “500 μm-risers”) as an efficient way for identif... Read More about Spitzer Catalog of Herschel-selected Ultrared Dusty Star-forming Galaxies.

The use of convolutional neural networks for modelling large optically-selected strong galaxy-lens samples (2019)
Journal Article

We explore the effectiveness of deep learning convolutional neural networks (CNNs) for estimating strong gravitational lens mass model parameters. We have investigated a number of practicalities faced when modelling real image data, such as how netwo... Read More about The use of convolutional neural networks for modelling large optically-selected strong galaxy-lens samples.

The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836 (2019)
Journal Article

Follow-up observations of (sub-)mm-selected gravitationally-lensed systems have allowed a more detailed study of the dust-enshrouded phase of star-formation up to very early cosmic times. Here, the case of the gravitationally lensed merger in HATLAS... Read More about The molecular-gas properties in the gravitationally lensed merger HATLAS J142935.3-002836.

CO, H 2 O, H 2 O + line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales (2019)
Journal Article

Using the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z =3.63 galaxy H-ATLAS J083051.0+013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Hers... Read More about CO, H 2 O, H 2 O + line and dust emission in a z = 3.63 strongly lensed starburst merger at sub-kiloparsec scales.

Filling in the Quasar Redshift Gap at z ∼ 5.5. II. A Complete Survey of Luminous Quasars in the Post-reionization Universe (2019)
Journal Article

We present the final results from our survey of luminous z ~ 5.5 quasars. This is the first systematic quasar survey focusing on quasars at z ~ 5.5, during the post-reionization epoch. It has been challenging to select quasars at 5.3 < z < 5.7 using... Read More about Filling in the Quasar Redshift Gap at z ∼ 5.5. II. A Complete Survey of Luminous Quasars in the Post-reionization Universe.

A magnified view of circumnuclear star formation and feedback around an active galactic nucleus at z = 2.6 (2018)
Journal Article

We present Atacama Large Millimeter/submillimeter Array observations of an intrinsically radio-bright (L 1.4 GHz = (1.7 ± 0.1) × 1025 W Hz−1) and infrared luminous (L IR ≈ 1013 L ⊙) galaxy at z = 2.6. The infrared-to-radio luminosity ratio, q = 1.8,... Read More about A magnified view of circumnuclear star formation and feedback around an active galactic nucleus at z = 2.6.

The causes of the red sequence, the blue cloud, the green valley, and the green mountain (2018)
Journal Article

The galaxies found in optical surveys fall in two distinct regions of a diagram of optical colour versus absolute magnitude: the red sequence and the blue cloud, with the green valley in between. We show that the galaxies found in a submillimetre sur... Read More about The causes of the red sequence, the blue cloud, the green valley, and the green mountain.

AutoLens: automated modeling of a strong lens’s light, mass and source (2018)
Journal Article

This work presents AutoLens, the first entirely automated modeling suite for the analysis of galaxy-scale strong gravitational lenses. AutoLens simultaneously models the lens galaxy’s light and mass whilst reconstructing the extended source galaxy on... Read More about AutoLens: automated modeling of a strong lens’s light, mass and source.

The Herschel-ATLAS data release 2. Paper II. Catalogs of far-infrared and submillimeter sources in the fields at the south and north Galactic poles (2018)
Journal Article

The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg2 with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500 μm. This is the second of three papers describing the data release for the... Read More about The Herschel-ATLAS data release 2. Paper II. Catalogs of far-infrared and submillimeter sources in the fields at the south and north Galactic poles.

Testing star formation laws in a starburst galaxy at redshift 3 resolved with ALMA (2018)
Journal Article

Using high-resolution (sub-kiloparsec scale) data obtained by ALMA, we analyse the star formation rate (SFR), gas content, and kinematics in SDP 81, a gravitationally lensed starburst galaxy at redshift 3. We estimate the SFR surface density (ΣSFR) i... Read More about Testing star formation laws in a starburst galaxy at redshift 3 resolved with ALMA.

Modelling high resolution ALMA observations of strongly lensed highly star forming galaxies detected by Herschel (2018)
Journal Article

We have modelled ∼0.1 arcsec resolution ALMA imaging of six strong gravitationally lensed galaxies detected by the Herschel Space Observatory. Our modelling recovers mass properties of the lensing galaxies and, by determining magnification factors, i... Read More about Modelling high resolution ALMA observations of strongly lensed highly star forming galaxies detected by Herschel.

ALMA observations of lensed Herschel sources: testing the dark matter halo paradigm (2018)
Journal Article

With the advent of wide-area submillimetre surveys, a large number of high-redshift gravitationally lensed dusty star-forming galaxies have been revealed. Because of the simplicity of the selection criteria for candidate lensed sources in such survey... Read More about ALMA observations of lensed Herschel sources: testing the dark matter halo paradigm.

The second Herschel–ATLAS Data Release – III. Optical and near-infrared counterparts in the North Galactic Plane field (2018)
Journal Article

This paper forms part of the second major public data release of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). In this work, we describe the identification of optical and near-infrared counterparts to the submillimetre detected so... Read More about The second Herschel–ATLAS Data Release – III. Optical and near-infrared counterparts in the North Galactic Plane field.

Candidate high-z proto-clusters among the Planck compact sources, as revealed by Herschel-SPIRE (2018)
Journal Article

By determining the nature of all the Planck compact sources within 808.4 deg2 of large Herschel surveys, we have identified 27 candidate proto-clusters of dusty star forming galaxies (DSFGs) that are at least 3σ overdense in either 250, 350 or 500 μm... Read More about Candidate high-z proto-clusters among the Planck compact sources, as revealed by Herschel-SPIRE.

The Herschel-ATLAS: magnifications and physical sizes of 500-?m-selected strongly lensed galaxies (2018)
Journal Article

We perform lens modelling and source reconstruction of Sub-millimetre Array (SMA) data for a sample of 12 strongly lensed galaxies selected at 500μm in the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). A previous analysis of the same... Read More about The Herschel-ATLAS: magnifications and physical sizes of 500-?m-selected strongly lensed galaxies.

The Herschel–ATLAS data release 2, Paper I. Submillimeter and far-infrared images of the South and North Galactic Poles: the largest Herschel survey of the extragalactic sky (2017)
Journal Article

We present the largest submillimeter images that have been made of the extragalactic sky. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg2 with the PACS and SPIRE cameras in five photometric bands: 100, 160, 25... Read More about The Herschel–ATLAS data release 2, Paper I. Submillimeter and far-infrared images of the South and North Galactic Poles: the largest Herschel survey of the extragalactic sky.