Search Publications
Low-end mass function of the arches cluster
Kim, Sungsoo S.; Shin, Jihye
The initial mass function (IMF) of the Arches cluster, which was formed a few million years ago in the harsh environment of the Galactic Centre (GC), has long been a target of interest to those who study the GC and the theory of star formation. The distinct star-forming conditions in the GC might have caused the cluster to have a shallower slope o…
Outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861: constraining the baryonic content through stellar population synthesis studies
Rosado, M.; Gabbasov, R.; Repetto, P. +1 more
In this paper, we investigate the outer and inner mass distributions of the irregular galaxies UGC 4284 and UGC 11861, taking advantage of published H I and H α high-resolution rotation curves and constraining the stellar disc of both galaxies throughout stellar population synthesis studies. In addition, we take into account the gas content of bot…
The CIB-lensing bispectrum: impact on primordial non-Gaussianity and detectability for the Planck mission
Curto, A.; Kunz, M.; Martínez-González, E. +1 more
We characterize the cosmic infrared background (CIB)-lensing bispectrum which is one of the contributions to the three-point functions of cosmic microwave background (CMB) maps in harmonic space. We show that the CIB-lensing bispectrum has a considerable strength and that it can be detected with high significance in the Planck high-frequency maps.…
Late-time spectroscopy of SN 2002hh: a continued visible light echo with no shock interaction yet
Smith, Nathan; Mauerhan, Jon C.; Andrews, J. E.
Supernova (SN) 2002hh was unusual among core-collapse SNe because it was highly reddened, and displayed a bright infrared (IR) excess due to radiatively heated dust in its circumstellar medium (CSM). Estimates for the mass of dust responsible for the IR echo suggested the presence of a massive shell within 0.26 pc of the star. For a velocity of 50…
Centaurus A: constraints on the nature of the giant lobe filaments from XMM-Newton observations
Croston, Judith H.; Hardcastle, Martin J.; Wykes, Sarka
We report on deep XMM-Newton observations of the vertex filament in the southern giant lobe of the Fanaroff-Riley class I radio galaxy Centaurus A. We find no X-ray excess from the filament region and place a 3σ upper limit on the 1 keV flux density of the filament of 9.6 nJy. This directly constrains the electron density and magnetic field streng…
Modelling galaxy spectra in presence of interstellar dust - III. From nearby galaxies to the distant Universe
Cassarà, L. P.; Piovan, L.; Chiosi, C.
Improving upon the standard evolutionary population synthesis technique, we present spectrophotometric models of galaxies with morphology going from spherical structures to discs, properly accounting for the effect of dust in the interstellar medium (ISM). The models contain three main physical components: the diffuse ISM made of gas and dust, the…
Sample of optically unidentified X-ray binaries in the Galactic bulge: constraints on the physical nature from infrared photometric surveys
Zolotukhin, Ivan Yu.; Revnivtsev, Mikhail G.
We report on archival near-infrared and mid-infrared observations of seven persistent X-ray sources situated in the Galactic bulge, using data from the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS), the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) and the Wide-field Infrared Survey Explorer (WISE) al…
CARMA observations of Galactic cold cores: searching for spinning dust emission
Paladini, R.; Ysard, N.; Laureijs, R. J. +9 more
We present the first search for spinning dust emission from a sample of 34 Galactic cold cores, performed using the CARMA interferometer. For each of our cores, we use photometric data from the Herschel Space Observatory to constrain bar{N}H, bar{T}d, bar{n}H, and bar{G}0. By computing the mass of the co…
The orthogonally aligned dark halo of an edge-on lensing galaxy in the Hubble Frontier Fields: a challenge for modified gravity
Broadhurst, Tom; Lam, Daniel; Lim, Jeremy +2 more
We examine a well-resolved lensed image that is bent by an edge-on lenticular galaxy, in the Hubble Frontier Fields (HFF) data of MACSJ0416.1-20403. The fortuitous combination of a long arc (zs ≈ 1 ± 0.2) intersecting an edge-on galaxy from the cluster (z = 0.4) provides an opportunity to constrain its dark matter (DM) halo and its orie…
A comprehensive HST BVI catalogue of star clusters in five Hickson compact groups of galaxies
Bastian, N.; Konstantopoulos, I. S.; Gallagher, S. C. +5 more
We present a photometric catalogue of star cluster candidates in Hickson compact groups (HCGs) 7, 31, 42, 59, and 92, based on observations with the Advanced Camera for Surveys and the Wide Field Camera 3 on the Hubble Space Telescope. The catalogue contains precise cluster positions (right ascension and declination), magnitudes, and colours in th…