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33 papers · 2 filters
J-PLUS: Tools to identify compact planetary nebulae in the Javalambre and southern photometric local universe surveys
L. A. Gutiérrez-Soto, D. R. Gonçalves, S. Akras +28
From the approximately 3,500 planetary nebulae (PNe) discovered in our Galaxy, only 14 are known to be members of the Galactic halo. Nevertheless, a systematic search for hal…
The colors and sizes of recently quenched galaxies: a result of compact starburst before quenching
Po-Feng Wu, Arjen van der Wel, Rachel Bezanson +11
We analyze the colors and sizes of 32 quiescent (UVJ-selected) galaxies with strong Balmer absorption ($\mbox{EW}(Hδ) \geq 4$Å) at drawn from DR2 of the LEGA-C survey to…
The East Asian Observatory SCUBA--2 survey of the COSMOS field: unveiling 1147 bright sub-millimeter sources across 2.6 square degrees
J. M. Simpson, Ian Smail, A. M. Swinbank +28
We present sensitive 850m imaging of the COSMOS field using 640hr of new and archival observations taken with SCUBA-2 at the East Asian Observatory's James Clerk Maxwell Telesco…
Unveiling the most luminous Lyman-α emitters in the epoch of reionisation
Jorryt Matthee, David Sobral
Distant luminous Lyman-alpha emitters are excellent targets for detailed observations of galaxies in the epoch of reionisation. Spatially resolved observations of these galaxies al…
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…
Multi-wavelength properties of radio and machine-learning identified counterparts to submillimeter sources in S2COSMOS
FangXia An, J. M. Simpson, Ian Smail +36
We identify multi-wavelength counterparts to 1,147 submillimeter sources from the S2COSMOS SCUBA-2 survey of the COSMOS field by employing a recently developed radiomachine-lear…
An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: High-resolution dust continuum morphologies and the link between sub-millimetre galaxies and spheroid formation
B. Gullberg, I. Smail, A. M. Swinbank +15
We present an analysis of the morphology and profiles of the dust continuum emission in 153 bright sub-millimetre galaxies (SMGs) detected with ALMA at S/N ratios of in high-r…
An ALMA survey of the SCUBA-2 CLS UDS field: Physical properties of 707 Sub-millimetre Galaxies
U. Dudzevičiūtė, Ian Smail, A. M. Swinbank +27
We analyse the physical properties of a large, homogeneously selected sample of ALMA-located sub-mm galaxies (SMGs). This survey, AS2UDS, identified 707 SMGs across the ~1 sq.deg.…
The evolution of rest-frame UV properties, Lya EWs and the SFR-Stellar mass relation at z~2-6 for SC4K LAEs
Sérgio Santos, David Sobral, Jorryt Matthee +6
We explore deep rest-frame UV to FIR data in the COSMOS field to measure the individual spectral energy distributions (SED) of the ~4000 SC4K (Sobral et al. 2018) Lyman-alpha (Lya)…
Secularly powered outflows from AGN: the dominance of non-merger driven supermassive black hole growth
Rebecca Smethurst, Brooke Simmons, Chris Lintott +1
Recent observations and simulations have revealed the dominance of secular processes over mergers in driving the growth of both supermassive black holes (SMBH) and galaxy evolution…
The X-ray and radio activity of typical and luminous Lya emitters from z~2 to z~6: evidence for a diverse, evolving population
João Calhau, David Sobral, Sérgio Santos +6
Despite recent progress in understanding Lyman-alpha (Lya) emitters (LAEs), relatively little is known regarding their typical black hole activity across cosmic time. Here, we stud…
Resolved Lyman-α properties of a luminous Lyman-break galaxy in a large ionised bubble at z = 6.53
Jorryt Matthee, David Sobral, Max Gronke +5
The observed properties of the Lyman- (Ly) emission line are a powerful probe of neutral gas in and around galaxies. We present spatially resolved Ly spectroscopy with VLT…
Spitzer catalog of Herschel-selected ultrared dusty, star-forming galaxies
Jingzhe Ma, Asantha Cooray, Hooshang Nayyeri +24
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 ($S_{500}…
VIS3COS: II. Nature and nurture in galaxy structure and morphology
Ana Paulino-Afonso, David Sobral, Behnam Darvish +7
We study the impact of local density and stellar mass on the morphology of ~500 quiescent (Q) and SFGs from the VIS3COS survey. We perform B/D decomposition of the SBPs and find ~4…
[OII] emitters in MultiDark-Galaxies and DEEP2
G. Favole, V. Gonzalez-Perez, A. Orsi +13
We use three semi-analytic models (SAMs) of galaxy formation and evolution, run on the same 1Gpc MultiDark Planck2 cosmological simulation, to investigate the properties of…
AGNs at the cosmic dawn: predictions for future surveys from a CDM cosmological model
Andrew J. Griffin, Cedric G. Lacey, Violeta Gonzalez-Perez +3
Telescopes to be launched over the next decade-and-a-half, such as JWST, EUCLID, ATHENA and Lynx, promise to revolutionise the study of the high redshift Universe and greatly advan…
J-PLUS: the impact of bars on quenching time-scales in nearby green valley disc galaxies
J. P. Nogueira-Cavalcante, R. Dupke, P. Coelho +28
In a framework where galaxies mostly migrate on the colour-magnitude diagram from star-forming to quiescent, the green valley is considered a transitional galaxy stage. The details…
Discovery of a giant and luminous Lya+CIV+HeII nebula at z=3.326 with extreme emission line ratios
R. Marques-Chaves, I. Pérez-Fournon, M. Villar-Martín +17
We present the discovery of HLock01-LAB, a luminous and large Lya nebula at z=3.326. Medium-band imaging and long-slit spectroscopic observations with the Gran Telescopio Canarias…
Signatures of stellar accretion in MaNGA early-type galaxies
Grecco A. Oyarzun, Kevin Bundy, Kyle B. Westfall +10
The late assembly of massive galaxies is thought to be dominated by stellar accretion in their outskirts (beyond 2 effective radii Re) due to dry, minor galaxy mergers. We use obse…
The kiloparsec-scale gas kinematics in two star-forming galaxies at seen with ALMA and VLT-SINFONI
J. Molina, Edo Ibar, I. Smail +5
We present Atacama Large Millimeter/submillimeter Array (ALMA) CO() observations of two main-sequence star-forming galaxies at taken from the High-Z Emission Lin…
Constraining Radio Mode Feedback in Galaxy Clusters with the Cluster Radio AGN Properties to z1
N. Gupta, M. Pannella, J. J. Mohr +58
We study the properties of the Sydney University Molonglo Sky Survey (SUMSS) 843~MHz radio AGN population in galaxy clusters from two large catalogs created using the Dark Energy S…
Deep-CEE I: Fishing for Galaxy Clusters with Deep Neural Nets
Matthew C. Chan, John P. Stott
We introduce Deep-CEE (Deep Learning for Galaxy Cluster Extraction and Evaluation), a proof of concept for a novel deep learning technique, applied directly to wide-field colour im…
Rejuvenation in quiescent galaxies in LEGA-C
Priscilla Chauke, Arjen van der Wel, Camilla Pacifici +12
We use reconstructed star-formation histories (SFHs) of quiescent galaxies at in the LEGA-C survey to identify secondary star-formation episodes that, after an initial pe…
Revealing the Stellar Mass and Dust Distributions of Submillimeter Galaxies at Redshift 2
P. Lang, E. Schinnerer, Ian Smail +35
We combine high-resolution ALMA and HST/CANDELS observations of 20 submillimeter galaxies (SMGs) predominantly from the AS2UDS survey at z~2 with bright rest-frame optical counterp…