Search Publications
Far-ultraviolet emission in the A2597 and A2204 brightest cluster galaxies
Jaffe, W.; van Weeren, R. J.; Bremer, M. N. +2 more
We use the Hubble Space Telescope Advanced Camera for Surveys (ACS)/Solar Blind Channel (SBC) and Very Large Telescope (VLT) Focal Reducer/low dispersion Spectrograph (FORS) cameras to observe the brightest cluster galaxies (BCGs) in Abell 2597 and Abell 2204 in the far-ultraviolet (FUV) F150LP and optical U, B, V, R, I Bessel filters.
The FU…The Hubble Space Telescope colours of high-redshift Population III galaxies with strong Lyα emission
Inoue, Akio K.; Rydberg, Claes-Erik; Zackrisson, Erik +1 more
Population III (pop III) galaxies, made partly or exclusively of metal-free stars, are predicted to exist at high redshifts and may produce very strong Lyα emission. A substantial fraction of these Lyα photons are likely absorbed in the intergalactic medium at z > 6, but recent simulations suggest that significant Lyα emission may be detectable…
On the source of dense outflows from T Tauri stars - III. Winds driven from the star-disc shear layer
Gómez de Castro, Ana I.; von Rekowski, Brigitta
Ultraviolet observations of classical T Tauri Stars (cTTSs) have shown that there is a hot (Te≃ 80 000 K) and dense (ne≃ 1010 cm-3) component associated with the large-scale jet. This hot component is formed very close to the base of the jet providing fundamental information on the jet formation mechanis…
On the association of ULXs with young superclusters: M82 X-1 and a new candidate in NGC 7479
Smartt, S. J.; Nelemans, G.; Fraser, M. +2 more
We investigate the spatial coincidence of ultraluminous X-ray sources (ULXs) with young massive stellar clusters. In particular, we perform astrometry on Chandra and Hubble Space Telescope (HST) data of two ULXs that are possibly associated with such clusters.
To date, M82 X-1 is the only ULX claimed to be coincident with a young massive stel…Which haloes host Herschel-ATLAS galaxies in the local Universe?
Rodighiero, G.; Ivison, R. J.; Baugh, Carlton M. +40 more
We measure the projected cross-correlation between low-redshift (z < 0.5) far-infrared selected galaxies in the science demonstration phase (SDP) field of the Herschel-ATLAS (H-ATLAS) survey and optically selected galaxies from the Galaxy and Mass Assembly (GAMA) redshift survey. In order to obtain robust correlation functions, we restrict the …
AGN feedback and iron enrichment in the powerful radio galaxy, 4C+55.16
Fabian, A. C.; Hlavacek-Larrondo, J.; Sanders, J. S. +1 more
We present a detailed X-ray analysis of 4C+55.16, an unusual and interesting radio galaxy, located at the centre of a cool core cluster of galaxies. 4C+55.16 is X-ray bright (LX(cluster)∼ 1045 erg s-1), radio powerful, and shows clear signs of interaction with the surrounding intracluster medium (ICM). By combining…
Observation of intensity oscillations above X-ray bright points from the Hinode/XRT: signature of magnetohydrodynamic oscillations in the solar corona
Srivastava, A. K.; Dwivedi, B. N.; Kumar, Mukul
We analyse the temporal image data of the quiet Sun observed by the X-ray Telescope (XRT) onboard the Hinode spacecraft and Al-poly filter on 2007 March 31. We choose these temporal image data of ∼30 s cadence from 11:34:48 UT to 14:19:35 UT to study intensity oscillations above selected X-ray bright points (XBPs) with an exposure time 8.193 s of …
The origin of gas in extended narrow-line regions of nearby Seyfert galaxies - I. NGC 7212
Moiseev, A. V.; La Mura, G.; Ciroi, S. +6 more
The extended narrow-line region (ENLR) of an active galactic nucleus (AGN) is a region of highly ionized gas with a size of a few up to 15-20 kpc. When it shows a conical or biconical shape with the apexes pointing towards the active nucleus, this region is also called an ionization cone. Ionization cones are evidence of the unified model, which p…
Long-term hard X-ray monitoring of 2S 0114+65 with INTEGRAL/IBIS
Wang, Wei
We present the results of the long-term hard X-ray monitoring of the high-mass X-ray binary 2S 0114+65 with INTEGRAL/IBIS from 2003 to 2008. 2S 0114+65 is a variable hard X-ray source with X-ray luminosities of 1035-4 × 1036 erg s-1 from 20 to 100 keV due to accretion rate changes in different orbital phases. In se…
Herschel-Astrophysical Terahertz Large Area Survey: detection of a far-infrared population around galaxy clusters
Rodighiero, G.; Ivison, R. J.; Clements, D. L. +30 more
We report the detection of a significant excess in the surface density of far-infrared sources from the Herschel-Astrophysical Terahertz Large Area Survey within ∼1 Mpc of the centres of 66 optically selected clusters of galaxies in the Sloan Digital Sky Survey with <z>∼ 0.25. From the analysis of the multiwavelength properties of their coun…