Search Publications
Outflows in the narrow-line region of bright Seyfert galaxies - I. GMOS-IFU data
Kraemer, S. B.; Crenshaw, D. M.; Elvis, M. +7 more
We present two-dimensional maps of emission-line fluxes and kinematics, as well as of the stellar kinematics of the central few kpc of five bright nearby Seyfert galaxies - Mrk 6, Mrk 79, Mrk 348, Mrk 607, and Mrk 1058 - obtained from observations with the Gemini Multi-Object Spectrograph Integral Field Unit on the Gemini North Telescope. The data…
HD 169142 in the eyes of ZIMPOL/SPHERE
Avenhaus, H.; Casassus, S.; Wolf, S. +5 more
We present new data of the protoplanetary disc surrounding the Herbig Ae/Be star HD 169142 obtained in the very broad-band (VBB) with the Zurich imaging polarimeter (ZIMPOL), a subsystem of the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument (SPHERE) at the Very Large Telescope (VLT). Our Polarimetric Differential Imaging (PDI) ob…
Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas
Ivison, R. J.; Smail, Ian; Riechers, D. A. +15 more
The most intensively star-forming galaxies are extremely luminous at far-infrared (FIR) wavelengths, highly obscured at optical and ultraviolet wavelengths, and lie at z ≥ 1-3. We present a programme of FIR spectroscopic observations with the SPIRE FTS, as well as photometric observations with PACS, both on board Herschel, towards a sample of 45 g…
The Herschel Bright Sources (HerBS): sample definition and SCUBA-2 observations
Ivison, R. J.; Omont, A.; Clements, D. L. +20 more
We present the Herschel Bright Sources (HerBS) sample, a sample of bright, high-redshift Herschel sources detected in the 616.4 deg2 Herschel Astrophysical Terahertz Large Area Survey. The HerBS sample contains 209 galaxies, selected with a 500 µm flux density greater than 80 mJy and an estimated redshift greater than 2. The sampl…
Dark Energy Survey Year 1 results: the impact of galaxy neighbours on weak lensing cosmology with IM3SHAPE
Benoit-Lévy, A.; Bechtol, K.; Smith, M. +69 more
We use a suite of simulated images based on Year 1 of the Dark Energy Survey to explore the impact of galaxy neighbours on shape measurement and shear cosmology. The HOOPOE image simulations include realistic blending, galaxy positions, and spatial variations in depth and point spread function properties. Using the IM3SHAPE maximum-likelihood shap…
Modelling high-resolution ALMA observations of strongly lensed highly star-forming galaxies detected by Herschel
Cooray, A.; Farrah, D.; Marchetti, L. +12 more
We have modelled ∼0.1 arcsec resolution Atacama Large Millimetre/submillimeter Array 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, intrinsic properties of the lensed submillimetre sources. We…
On the accuracy of mass measurement for microlensing black holes as seen by Gaia and OGLE
Rybicki, Krzysztof A.; Wyrzykowski, Łukasz; Klencki, Jakub +3 more
We investigate the impact of combining Gaia astrometry from space with precise, high cadence OGLE photometry from the ground. For the archival event OGLE3-ULENS-PAR-02, which is likely a black hole, we simulate a realistic astrometric time series of Gaia measurements and combine it with the real photometric data collected by the OGLE project. We p…
Gaia luminosities of pulsating A-F stars in the Kepler field
Balona, L. A.
All stars in the Kepler field brighter than 12.5 mag have been classified according to variability type. A catalogue of δ Scuti and γ Doradus stars is presented. The problem of low frequencies in δ Sct stars, which occurs in over 98 percent of these stars, is discussed. Gaia DR2 parallaxes were used to obtain precise luminosities, enabling the ins…
ETHOS - an effective theory of structure formation: predictions for the high-redshift Universe - abundance of galaxies and reionization
Vogelsberger, Mark; Pillepich, Annalisa; Lovell, Mark R. +6 more
We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently developed ETHOS framework that alleviates the small-scale CDM challenges within the Local Group. We perform the highest resolution hydrodynamical cosmolo…
Search for star cluster age gradients across spiral arms of three LEGUS disc galaxies
Cignoni, M.; Tosi, M.; Sabbi, E. +20 more
One of the main theories for explaining the formation of spiral arms in galaxies is the stationary density wave theory. This theory predicts the existence of an age gradient across the arms. We use the stellar cluster catalogues of the galaxies NGC 1566, M51a, and NGC 628 from the Legacy ExtraGalactic UV Survey (LEGUS) program. In order to test fo…