Search Publications

A multiwavelength analysis of the clumpy FIR-bright sources in M33

Wilson, C. D.; Foyle, K.; Natale, G. +1 more

We present a multiwavelength study of a sample of far-infrared (FIR) sources detected on the Herschel broad-band maps of the nearby galaxy M33. We perform source photometry on the FIR maps as well as mid-infrared (MIR), Hα, far-ultraviolet and integrated H I and CO line emission maps. By fitting MIR/FIR dust emission spectra, the source dust masse…

Ultraviolet characteristics, outflow properties and variability of active galactic nucleus Markarian 1513

Arav, Nahum; Borguet, Benoit; Edmonds, Doug +4 more

We analysed data from the Cosmic Origins Spectrograph (COS) to characterize the spectral properties and outflows of the active galactic nucleus (AGN), Markarian 1513. Further investigation using previous data collected by the Space Telescope Imaging Spectrograph (STIS), Goddard High Resolution Spectrograph (GHRS), and International Ultraviolet Exp…

A filament eruption with an apparent reshuffle of endpoints

Filippov, Boris

A filament eruption during 2010 April 30-May 1, which shows the reconnection of one filament leg with a region far away from its initial position, is analysed. Observations from three viewpoints are used for measurements of endpoint coordinates as precise as possible. The northern leg of the erupting prominence loop `jumps' laterally to a latitude…

Erratum: Herschel, Spitzer and Magellan infrared observations of the star-forming region RCW 121 (IRAS 17149-3916)

Roth, M.; Elia, D.; Gómez, M. +4 more

Unveiling the nature of an X-ray flare from 3XMM* J014528.9+610729: a candidate spiral galaxy

Pandey, J. C.; Bhatt, Himali; Bhattacharyya, Subir +1 more

We report an X-ray flare from 3XMM J014528.9+610729, serendipitously detected during the observation of the open star cluster NGC 663. The colour-colour space technique using optical and infrared data reveals the X-ray source as a candidate spiral galaxy. The flare shows fast rise and exponential decay shape with a ratio of the peak and the quiesc…

A neutrino model fit to the CMB power spectrum

Shanks, T.; Johnson, R. W. F.; Schewtschenko, J. A. +1 more

The standard cosmological model, Λ cold dark matter (ΛCDM), provides an excellent fit to cosmic microwave background (CMB) data. However, the model has well-known problems. For example, the cosmological constant, Λ, is fine-tuned to 1 part in 10¹⁰⁰ and the CDM particle is not yet detected in the laboratory. Shanks previously investigate…

Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models

Rea, N.; Perna, R.; Pons, J. A. +3 more

Observations of magnetars and some of the high magnetic field pulsars have shown that their thermal luminosity is systematically higher than that of classical radio-pulsars, thus confirming the idea that magnetic fields are involved in their X-ray emission. Here we present the results of 2D simulations of the fully coupled evolution of temperature…

The Herschel PEP/HerMES luminosity function - I. Probing the evolution of PACS selected Galaxies to z ≃ 4

Berta, S.; Magnelli, B.; Nordon, R. +100 more

We exploit the deep and extended far-IR data sets (at 70, 100 and 160 µm) of the Herschel Guaranteed Time Observation (GTO) PACS Evolutionary Probe (PEP) Survey, in combination with the Herschel Multi-tiered Extragalactic Survey data at 250, 350 and 500 µm, to derive the evolution of the rest-frame 35-, 60-, 90- and total infrared (IR)…

A new multifield determination of the galaxy luminosity function at z = 7-9 incorporating the 2012 Hubble Ultra-Deep Field imaging

Bowler, R. A. A.; McLure, R. J.; Dunlop, J. S. +14 more

We present a new determination of the ultraviolet (UV) galaxy luminosity function (LF) at redshift z ≃ 7 and 8, and a first estimate at z ≃ 9. An accurate determination of the form and evolution of the galaxy LF during this era is of key importance for improving our knowledge of the earliest phases of galaxy evolution and the process of cosmic rei…

Irradiation of an accretion disc by a jet: general properties and implications for spin measurements of black holes

Reynolds, C. S.; Dauser, T.; Wilms, J. +5 more

X-ray irradiation of the accretion disc leads to strong reflection features, which are then broadened and distorted by relativistic effects. We present a detailed, general relativistic approach to model this irradiation for different geometries of the primary X-ray source. These geometries include the standard point source on the rotational axis a…