Search Publications
Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems
Ivison, R. J.; Bryden, G.; Kavelaars, J. J. +15 more
This paper describes Herschel observations of the nearby (8.5 pc) G5V multi-exoplanet host star 61 Vir at 70, 100, 160, 250, 350 and 500 ?m carried out as part of the DEBRIS survey. These observations reveal emission that is significantly extended out to a distance of >15 arcsec with a morphology that can be fitted by a nearly edge-on (77° incl…
Hubble Space Telescope studies of low-redshift Type Ia supernovae: evolution with redshift and ultraviolet spectral trends
Gal-Yam, A.; Sullivan, M.; Nugent, P. E. +26 more
We present an analysis of the maximum light, near-ultraviolet (NUV; 2900 < λ < 5500 Å) spectra of 32 low-redshift (0.001 < z < 0.08) Type Ia supernovae (SNe Ia), obtained with the Hubble Space Telescope (HST) using the Space Telescope Imaging Spectrograph. We combine this spectroscopic sample with high-quality gri light curves obtained…
Spectral analysis of 1H 0707-495 with XMM-Newton
Schartel, N.; Santos-Lleó, M.; Ehle, M. +6 more
We present the results of a 500 ks long XMM-Newton observation and a 120 ks long quasi-simultaneous Chandra observation of the Narrow-Line Seyfert 1 galaxy 1H 0707-495 performed in 2010 September. Consistent with earlier results by Fabian et al. and Zoghbi et al., the spectrum is found to be dominated by relativistically broadened reflection featu…
The XMM-Newton serendipitous ultraviolet source survey catalogue
Talavera, A.; Page, M. J.; Cropper, M. S. +11 more
The XMM-Newton Serendipitous Ultraviolet Source Survey (XMM-SUSS) is a catalogue of ultraviolet (UV) sources detected serendipitously by the Optical Monitor (XMM-OM) on board the XMM-Newton observatory. The catalogue contains UV-detected sources collected from 2417 XMM-OM observations in one to six broad-band UV and optical filters, made between 2…
High-velocity clouds as streams of ionized and neutral gas in the halo of the Milky Way
Lehner, N.; Fox, A. J.; Tripp, T. M. +4 more
High-velocity clouds (HVCs), fast-moving ionized and neutral gas clouds found at high galactic latitudes, may play an important role in the evolution of the Milky Way. The extent of this role depends sensitively on their distances and total sky covering factor. We search for HVC absorption in Hubble Space Telescope high-resolution ultraviolet (UV)…
The low-mass end of the fundamental relation for gravitationally lensed star-forming galaxies at 1 < z < 6
Richard, Johan; Hjorth, Jens; Grillo, Claudio +6 more
We present Very Large Telescope/X-shooter spectra of 13 galaxies in the redshift range 1 ≲ z ≲ 6, which are strongly lensed by massive galaxy clusters. Spectroscopic redshifts are measured for nine galaxies, while three sources have redshifts determined from continuum breaks in their spectra. The stellar masses of the galaxies span four orders of …
Heavily reddened quasars at z ∼ 2 in the UKIDSS Large Area Survey: a transitional phase in AGN evolution
McMahon, Richard G.; Venemans, Bram P.; Hewett, Paul C. +4 more
We present a new sample of purely near-infrared-selected KVega < 16.5 [KAB < 18.4] extremely red [(J - K)Vega > 2.5] quasar candidates at z ∼ 2 from ≃900 deg2 of data in the UKIDSS Large Area Survey (LAS). Five of these are spectroscopically confirmed to be heavily reddened type 1 active galacti…
Improved models for cosmic infrared background anisotropies: new constraints on the infrared galaxy population
Knox, Lloyd; Oh, S. Peng; Shang, Cien +1 more
The power spectrum of cosmic infrared background (CIB) anisotropies is sensitive to the connection between star formation and dark matter haloes over the entire cosmic star formation history. Here we develop a model that associates star-forming galaxies with dark matter haloes and their subhaloes. The model is based on a parametrized relation betw…
Precision simulation of ground-based lensing data using observations from space
Leauthaud, Alexie; Rhodes, Jason; Mandelbaum, Rachel +2 more
Current and upcoming wide-field, ground-based, broad-band imaging surveys promise to address a wide range of outstanding problems in galaxy formation and cosmology. Several such uses of ground-based data, especially weak gravitational lensing, require highly precise measurements of galaxy image statistics with careful correction for the effects of…
Spatially resolved observations of warm ionized gas and feedback in local ULIRGs
Clements, D. L.; Bendo, G. J.; Westmoquette, M. S. +1 more
We present Very Large Telescope (VLT)/VIsible MultiObject Spectrograph integral field unit (VIMOS-IFU) emission-line spectroscopy of a volume-limited sample of 18 southern ultraluminous infrared galaxies (ULIRGs) selected with z < 0.09 and δ < 10. By covering a wide range of ULIRG types, including many systems that have received very little …