Search Publications
Using cm observations to constrain the abundance of very small dust grains in Galactic cold cores
Paladini, R.; Ysard, N.; Laureijs, R. J. +9 more
In this analysis, we illustrate how the relatively new emission mechanism, known as spinning dust, can be used to characterize dust grains in the interstellar medium. We demonstrate this by using spinning dust emission observations to constrain the abundance of very small dust grains (a ≲ 10 nm) in a sample of Galactic cold cores. Using the physic…
Spectral analysis of SMC X-2 during its 2015 outburst
Tiengo, A.; Mereghetti, S.; Sidoli, L. +3 more
We report on the results of XMM-Newton and Swift observations of SMC X-2 during its last outburst in 2015 October, the first one since 2000. The source reached a very high luminosity (L ∼ 1038 erg s-1), which allowed us to perform a detailed analysis of its timing and spectral properties. We obtained a pulse period Pspin…
Simultaneous radio and X-ray observations of PSR B0611+22
Rajwade, K.; Seymour, A.; Lorimer, D. R. +4 more
We report results from simultaneous radio and X-ray observations of PSR B0611+22 which is known to exhibit bursting in its single-pulse emission. The pulse phase of the bursts vary with radio frequency. The bursts are correlated in 327/150 MHz data sets while they are anti-correlated, with bursts at one frequency associated with normal emission at…
Evidence that widespread star formation may be underway in G0.253+0.016, `The Brick'
Marsh, K. A.; Whitworth, A. P.; Clark, P. C. +1 more
Image cubes of differential column density as a function of dust temperature are constructed for Galactic Centre molecular cloud G0.253+0.016 (`The Brick') using the recently described PPMAP procedure. The input data consist of continuum images from the HerschelSpace Telescope in the wavelength range 70-500 µm, supplemented by previously pub…
Probing star formation in the dense environments of z ∼ 1 lensing haloes aligned with dusty star-forming galaxies detected with the South Pole Telescope
Omont, A.; Dole, H.; Doré, O. +46 more
We probe star formation in the environments of massive (∼1013 M⊙) dark matter haloes at redshifts of z ∼ 1. This star formation is linked to a submillimetre clustering signal which we detect in maps of the Planck High Frequency Instrument that are stacked at the positions of a sample of high redshift (z > 2) strongly lense…
Complex central structures suggest complex evolutionary paths for barred S0 galaxies
Knapen, Johan H.; Dullo, Bililign T.; Martínez-Lombilla, Cristina
We investigate three barred lenticular galaxies (NGC 2681, NGC 3945 and NGC 4371), which were previously reported to have complex central structures but without a detailed structural analysis of these galaxies' high-resolution data. We have therefore performed four- to six-component (pseudo-)bulge/disc/bar/ring/point source) decompositions of the …
SILC: a new Planck internal linear combination CMB temperature map using directional wavelets
Leistedt, Boris; Peiris, Hiranya V.; Pontzen, Andrew +2 more
We present new clean maps of the cosmic microwave background (CMB) temperature anisotropies (as measured by Planck) constructed with a novel internal linear combination (ILC) algorithm using directional, scale-discretized wavelets - scale-discretized, directional wavelet ILC or Scale-discretised, directional wavelet Internal Linear Combination (SI…
How unusual is the cool-core radio halo cluster CL1821+643?
Kale, Ruta; Parekh, Viral
Massive galaxy clusters with cool cores typically host diffuse radio sources called mini-haloes, whereas, those with non-cool cores host radio haloes. We attempt to understand the unusual nature of the cool-core galaxy cluster CL1821+643, which hosts a megaparsec-scale radio halo, using new radio observations and morphological analysis of its intr…
Multi-wavelength properties of IGR J05007-7047 (LXP 38.55) and identification as a Be X-ray binary pulsar in the LMC
Haberl, F.; Udalski, A.; Sturm, R. +2 more
We report on the results of a ∼40-d multi-wavelength monitoring of the Be X-ray binary system IGR J05007-7047 (LXP 38.55). During that period the system was monitored in the X-rays using the Swift telescope and in the optical with multiple instruments. When the X-ray luminosity exceeded 1036 erg s-1 we triggered an XMM-Newton…
The size and shape of the Milky Way disc and halo from M-type brown dwarfs in the BoRG survey
Trenti, M.; Bouwens, R. J.; Holwerda, B. W. +3 more
We have identified 274 M-type brown dwarfs in the Hubble Space Telescope's Wide Field Camera 3 pure parallel fields from the Brightest of Reionizing Galaxies (BoRG) survey for high-redshift galaxies. These are near-infrared observations with multiple lines of sight out of our Milky Way. Using these observed M-type brown dwarfs, we fitted a Galacti…