Publications
672 results found
Borsato E, Marchetti L, Negrello M, et al., 2024, Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observations, Monthly Notices of the Royal Astronomical Society, Vol: 528, Pages: 6222-6279, ISSN: 0035-8711
We have carried out Hubble Space Telescope (HST) snapshot observations at 1.1 μm of 281 candidate strongly lensed galaxies identified in the wide-area extragalactic surveys conducted with the Herschel Space Observatory. Our candidates comprise systems with flux densities at 500 μm, S500 ≥ 80 mJy. We model and subtract the surface brightness distribution for 130 systems, where we identify a candidate for the foreground lens candidate. After combining visual inspection, archival high-resolution observations, and lens subtraction, we divide the systems into different classes according to their lensing likelihood. We confirm 65 systems to be lensed. Of these, 30 are new discoveries. We successfully perform lens modelling and source reconstruction on 23 systems, where the foreground lenses are isolated galaxies and the background sources are detected in the HST images. All the systems are successfully modelled as a singular isothermal ellipsoid. The Einstein radii of the lenses and the magnifications of the background sources are consistent with previous studies. However, the background source circularized radii (between 0.34 and 1.30 kpc) are ∼3 times smaller than the ones measured in the sub-millimetre/millimetre for a similarly selected and partially overlapping sample. We compare our lenses with those in the Sloan Lens Advanced Camera for Surveys (ACS) Survey confirming that our lens-independent selection is more effective at picking up fainter and diffuse galaxies and group lenses. This sample represents the first step towards characterizing the near-infrared properties and stellar masses of the gravitationally lensed dusty star-forming galaxies.
Pearson J, Serjeant S, Wang WH, et al., 2024, A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys inferred from JWST imaging, Monthly Notices of the Royal Astronomical Society, Vol: 527, Pages: 12044-12052, ISSN: 0035-8711
Bright galaxies at submillimetre wavelengths from Herschel are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this strongly lensed population also predict about 1 per cent of faint 450 μm-selected galaxies from deep James Clerk Maxwell Telescope (JCMT) surveys will also be strongly lensed. Follow-up ALMA campaigns have so far found one potential lens candidate, but without clear compelling evidence, for example, from lensing arcs. Here, we report the discovery of a compelling gravitational lens system confirming the lensing population predictions, with a zs = 3.4 ± 0.4 submm source lensed by a zspec = 0.360 foreground galaxy within the COSMOS field, identified through public JWST imaging of a 450 μm source in the SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) catalogue. These systems will typically be well within the detectable range of future wide-field surveys such as Euclid and Roman, and since submillimetre galaxies are predominantly very red at optical/near-infrared wavelengths, they will tend to appear in near-infrared channels only. Extrapolating to the Euclid-Wide survey, we predict tens of thousands of strongly lensed near-infrared galaxies. This will be transformative for the study of dusty star-forming galaxies at cosmic noon, but will be a contaminant population in searches for strongly lensed ultra-high-redshift galaxies in Euclid and Roman.
Greaves JS, Petkowski JJ, Richards AMS, et al., 2023, Comment on “Phosphine in the Venusian Atmosphere: A Strict Upper Limit From SOFIA GREAT Observations” by Cordiner et al., Geophysical Research Letters, Vol: 50, ISSN: 0094-8276
Searches for phosphine in Venus' atmosphere have sparked a debate. Cordiner et al. (2022, https://doi.org/10.1029/2022gl101055) analyze spectra from the Stratospheric Observatory For Infrared Astronomy (SOFIA) and infer <0.8 ppb of PH3. We noticed that some spectral artifacts arose from non-essential calibration-load signals. By-passing these signals allows simpler post-processing and a 5.7σ candidate detection, suggesting ∼3 ppb of PH3 above the clouds. Compiling six phosphine results hints at an inverted abundance trend: decreasing above the clouds but rising again in the mesosphere from some unexplained source. However, no such extra source is needed if phosphine is undergoing destruction by sunlight (photolysis), to a similar degree as on Earth. Low phosphine values/limits are found where the viewed part of the super-rotating Venusian atmosphere had passed through sunlight, while high values are from views moving into sunlight. We suggest Venusian phosphine is indeed present, and so merits further work on models of its origins.
Garratt TK, Geach JE, Tamura Y, et al., 2023, The SCUBA-2 Large eXtragalactic Survey: 850μm map, catalogue and the bright-end number counts of the XMM-LSS field, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 520, Pages: 3669-3687, ISSN: 0035-8711
Farrah D, Croker KS, Zevin M, et al., 2023, Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy, ASTROPHYSICAL JOURNAL LETTERS, Vol: 944, ISSN: 2041-8205
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- Citations: 7
Farrah D, Petty S, Croker KSS, et al., 2023, A Preferential Growth Channel for Supermassive Black Holes in Elliptical Galaxies at <i>z</i> ≲ 2, ASTROPHYSICAL JOURNAL, Vol: 943, ISSN: 0004-637X
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- Citations: 6
Cramer WJ, Noble AG, Massingill K, et al., 2023, A Large-scale Kinematic Study of Molecular Gas in High-<i>z</i> Cluster Galaxies: Evidence for High Levels of Kinematic Asymmetry, ASTROPHYSICAL JOURNAL, Vol: 944, ISSN: 0004-637X
Cairns J, Clements DL, Greenslade J, et al., 2023, The nature of 500 micron risers - II. Multiplicities and environments of sub-mm faint dusty star-forming galaxies, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 519, Pages: 709-728, ISSN: 0035-8711
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- Citations: 1
Farrah D, Efstathiou A, Afonso J, et al., 2023, Molecular Gas Heating, Star Formation Rate Relations, and AGN Feedback in Infrared-Luminous Galaxy Mergers, UNIVERSE, Vol: 9
Gao F, Wang L, Ramos Padilla AF, et al., 2022, Probing the megaparsec-scale environment of hyperluminous infrared galaxies at 2 < <i>z</i> < 4, ASTRONOMY & ASTROPHYSICS, Vol: 668, ISSN: 0004-6361
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- Citations: 1
Clements DLL, 2022, Venus, phosphine and the possibility of life, CONTEMPORARY PHYSICS, Vol: 63, Pages: 180-199, ISSN: 0010-7514
Symeonidis M, Maddox N, Jarvis MJ, et al., 2022, The star formation rates of QSOs, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 514, Pages: 4450-4464, ISSN: 0035-8711
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- Citations: 5
Greaves JS, Rimmer PB, Richards AMS, et al., 2022, Low levels of sulphur dioxide contamination of Venusian phosphine spectra, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 514, Pages: 2994-3001, ISSN: 0035-8711
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- Citations: 6
Shim H, Lee D, Kim Y, et al., 2022, Multiwavelength properties of 850-μm selected sources from the North Ecliptic Pole SCUBA-2 survey, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 514, Pages: 2915-2935, ISSN: 0035-8711
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- Citations: 3
Klyce W, Suresh KV, Jain A, et al., 2022, Pedicle Screw Plowing in Adolescent Idiopathic Scoliosis How Common Is It and Is It a Problem?, SPINE, Vol: 47, Pages: 873-878, ISSN: 0362-2436
Farrah D, Efstathiou A, Afonso J, et al., 2022, Stellar and black hole assembly in <i>z</i> < 0.3 infrared-luminous mergers: intermittent starbursts versus super-Eddington accretion, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 513, Pages: 4770-4786, ISSN: 0035-8711
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- Citations: 10
Efstathiou A, Farrah D, Afonso J, et al., 2022, A new look at local ultraluminous infrared galaxies: the atlas and radiative transfer models of their complex physics, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 512, Pages: 5183-5213, ISSN: 0035-8711
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- Citations: 8
Runburg J, Farrah D, Sajina A, et al., 2022, Consistent Analysis of the AGN LF in X-Ray and MIR in the XMM-LSS Field, ASTROPHYSICAL JOURNAL, Vol: 924, ISSN: 0004-637X
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- Citations: 5
Manning SM, Casey CM, Zavala JA, et al., 2022, Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies, ASTROPHYSICAL JOURNAL, Vol: 925, ISSN: 0004-637X
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- Citations: 15
Casey CM, Zavala JA, Manning SM, et al., 2021, Mapping Obscuration to Reionization with ALMA (MORA): 2 mm Efficiently Selects the Highest-redshift Obscured Galaxies, ASTROPHYSICAL JOURNAL, Vol: 923, ISSN: 0004-637X
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- Citations: 22
Smith MWL, Eales SA, Williams TG, et al., 2021, The HASHTAG Project: The First Submillimeter Images of the Andromeda Galaxy from the Ground, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol: 257, ISSN: 0067-0049
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- Citations: 3
Shaikh F, Dar S, Shenderey R, et al., 2021, FAECAL ELASTASE MAY HAVE A ROLE IN THE INVESTIGATION OF IRON DEFICIENCY ANAEMIA, Publisher: BMJ PUBLISHING GROUP, Pages: A204-A204, ISSN: 0017-5749
Greaves JS, Richards AMS, Bains W, et al., 2021, Phosphine gas in the cloud deck of Venus (vol 5, pg 655, 2021), Nature Astronomy, Vol: 5, Pages: 726-728, ISSN: 2397-3366
Greaves JS, Richards AMS, Bains W, et al., 2021, Reply to: No evidence of phosphine in the atmosphere of Venus from independent analyses, NATURE ASTRONOMY, Vol: 5, Pages: 636-+, ISSN: 2397-3366
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- Citations: 18
Sufian AT, Abdullah BM, Ateeq M, et al., 2021, Six-Gear Roadmap towards the Smart Factory, APPLIED SCIENCES-BASEL, Vol: 11
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- Citations: 8
Zavala JA, Casey CM, Manning SM, et al., 2021, The Evolution of the IR Luminosity Function and Dust-obscured Star Formation over the Past 13 Billion Years, ASTROPHYSICAL JOURNAL, Vol: 909, ISSN: 0004-637X
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- Citations: 53
Lacy M, Surace JA, Farrah D, et al., 2021, A <i>Spitzer</i> survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 501, Pages: 892-910, ISSN: 0035-8711
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- Citations: 11
Riechers DA, Nayyeri H, Burgarella D, et al., 2021, Rise of the titans: gas excitation and feedback in a binary hyper-luminous dusty starburst galaxy at z~6, Astrophysical Journal Supplement Series, Vol: 907, Pages: 1-18, ISSN: 0067-0049
We report new observations toward the hyper-luminous dusty starbursting majormerger ADFS-27 (z=5.655), using ATCA and ALMA. We detect CO 2-1, 8-7, 9-8, 10-9and H2O(321-221) emission, and a P-Cygni-shaped OH+(11-01) absorption/emissionfeature. We also tentatively detect H2O(321-312) and OH+(12-01) emission andCH+(1-0) absorption. We find a total cold molecular mass of M_gas = (2.1+/-0.2)x 10^11 (alpha_CO/1.0) Msun. We also find that the excitation of thestar-forming gas is overall moderate for a z>5 dusty starburst, which isconsistent with its moderate dust temperature. A high density, high kinetictemperature gas component embedded in the gas reservoir is required to fullyexplain the CO line ladder. This component is likely associated with the"maximum starburst" nuclei in the two merging galaxies, which are separated byonly (140+/-13) km/s along the line of sight and 9.0 kpc in projection. Thekinematic structure of both components is consistent with galaxy disks, butthis interpretation remains limited by the spatial resolution of the currentdata. The OH+ features are only detected towards the northern component, whichis also the one that is more enshrouded in dust and thus remains undetected upto 1.6 um even in our sensitive new HST/WFC3 imaging. The absorption componentof the OH+ line is blueshifted and peaks near the CO and continuum emissionpeak while the emission is redshifted and peaks offset by 1.7 kpc from the COand continuum emission peak, suggesting that the gas is associated with amassive molecular outflow from the intensely star-forming nucleus that supplies125 Msun/yr of enriched gas to its halo.
Dudzeviciute U, Smail I, Swinbank AM, et al., 2021, Tracing the evolution of dust-obscured activity using sub-millimetre galaxy populations from STUDIES and AS2UDS, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 500, Pages: 942-961, ISSN: 0035-8711
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- Citations: 11
Clements DL, Serjeant S, Jin S, 2020, Explain ESA's late ditching of new space telescope, NATURE, Vol: 587, Pages: 548-548, ISSN: 0028-0836
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- Citations: 4
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