Search Publications
Non-parametric analysis of the rest-frame UV sizes and morphological disturbance amongst L* galaxies at 4 < z < 8
Ferguson, H. C.; McLure, R. J.; Dunlop, J. S. +12 more
We present the results of a study investigating the sizes and morphologies of redshift 4 < z < 8 galaxies in the CANDELS (Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey) GOODS-S (Great Observatories Origins Deep Survey southern field), HUDF (Hubble Ultra-Deep Field) and HUDF parallel fields. Based on non-parametric measuremen…
The evolution of the equivalent width of the Hα emission line and specific star formation rate in star-forming galaxies at 1 < z < 5
Cullen, F.; McLure, R. J.; Dunlop, J. S. +3 more
We present the results of a study which uses spectral energy distribution (SED) fitting to investigate the evolution of the equivalent width (EW) of the Hα emission line in star-forming galaxies over the redshift interval 1 < z < 5. After first demonstrating the ability of our SED-fitting technique to recover EW(Hα) using a sample of galaxie…
Direct Simulation Monte Carlo modelling of the major species in the coma of comet 67P/Churyumov-Gerasimenko
Altwegg, K.; Huang, Z.; Erard, S. +26 more
We analyse the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) - the Double Focusing Mass Spectrometer data between 2014 August and 2016 February to examine the effect of seasonal variations on the four major species within the coma of 67P/Churyumov-Gerasimenko (H2O, CO2, CO, and O2), resulting f…
Comet 67P/Churyumov-Gerasimenko preserved the pebbles that formed planetesimals
Rodriguez, J.; Colangeli, L.; Della Corte, V. +16 more
Solar system formation models predict that the building blocks of planetesimals were mm- to cm-sized pebbles, aggregates of ices and non-volatile materials, consistent with the compact particles ejected by comet 67P/Churyumov-Gerasimenko (67P hereafter) and detected by GIADA (Grain Impact Analyzer and Dust Accumulator) on-board the Rosetta spacecr…
Jellyfish: the origin and distribution of extreme ram-pressure stripping events in massive galaxy clusters
Ebeling, Harald; McPartland, Conor; Roediger, Elke +1 more
We investigate the observational signatures and physical origin of ram-pressure stripping (RPS) in 63 massive galaxy clusters at z = 0.3-0.7, based on images obtained with the Hubble Space Telescope. Using a training set of a dozen `jellyfish' galaxies identified earlier in the same imaging data, we define morphological criteria to select 211 addi…
Optically thick outflows in ultraluminous supersoft sources
Soria, R.; Urquhart, R.
Ultraluminous supersoft sources (ULSs) are defined by a thermal spectrum with colour temperatures ∼0.1 keV, bolometric luminosities ∼ a few 1039 erg s-1, and almost no emission above 1 keV. It has never been clear how they fit into the general scheme of accreting compact objects. To address this problem, we studied a sample o…
Mass assembly and morphological transformations since z ∼ 3 from CANDELS
Daddi, E.; Kartaltepe, J. S.; Koekemoer, A. M. +14 more
We quantify the evolution of the stellar mass functions (SMFs) of star-forming and quiescent galaxies as a function of morphology from z ∼ 3 to the present. Our sample consists of ∼50 000 galaxies in the CANDELS fields (∼880 arcmin2), which we divide into four main morphological types, I.e. pure bulge-dominated systems, pure spiral disc…
Searching for decaying dark matter in deep XMM-Newton observation of the Draco dwarf spheroidal
Boyarsky, Alexey; Ruchayskiy, Oleg; Bulbul, Esra +6 more
We present results of a search for the 3.5 keV emission line in our recent very long (∼ 1.4 Ms) XMM-Newton observation of the Draco dwarf spheroidal galaxy. The astrophysical X-ray emission from such dark matter-dominated galaxies is faint, thus they provide a test for the dark matter origin of the 3.5 keV line previously detected in other massive…
Multiple stellar populations in Magellanic Cloud clusters - IV. The double main sequence of the young cluster NGC 1755
Da Costa, G. S.; Milone, A. P.; Marino, A. F. +4 more
Nearly all the star clusters with ages of ∼1-2 Gyr in both Magellanic Clouds exhibit an extended main-sequence turn-off (eMSTO) whose origin is under debate. The main scenarios suggest that the eMSTO could be either due to multiple generations of stars with different ages or to coeval stellar populations with different rotation rates. In this pape…
The Herschel-ATLAS Data Release 1 - II. Multi-wavelength counterparts to submillimetre sources
Ivison, R. J.; Dunlop, J. S.; Cooray, A. +27 more
This paper is the second in a pair of papers presenting data release 1 (DR1) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS), the largest single open-time key project carried out with the Herschel Space Observatory. The H-ATLAS is a wide-area imaging survey carried out in five photometric bands at 100, 160, 250, 350 and 500 &mi…