Search Publications
A weak gravitational lensing recalibration of the scaling relations linking the gas properties of dark haloes to their mass
Wang, Wenting; White, Simon D. M.; Mandelbaum, Rachel +3 more
We use weak gravitational lensing to measure mean mass profiles around locally brightest galaxies (LBGs). These are selected from the Seventh Data Release of the Sloan Digital Sky Survey spectroscopic and photometric catalogues to be brighter than any neighbour projected within 1.0 Mpc and differing in redshift by <1000 km s-1. Most …
Timing of the accreting millisecond pulsar SAX J1748.9-2021 during its 2015 outburst
Sanna, A.; Di Salvo, T.; Burderi, L. +6 more
We report on the timing analysis of the 2015 outburst of the intermittent accreting millisecond X-ray pulsar SAX J1748.9-2021 observed on March 4 by the X-ray satellite XMM-Newton. By phase connecting the time of arrivals of the observed pulses, we derived the best-fitting orbital solution for the 2015 outburst. We investigated the energy pulse pr…
Abundance ratios and IMF slopes in the dwarf elliptical galaxy NGC 1396 with MUSE
Smith, R.; Peletier, R. F.; Paolillo, M. +16 more
Deep observations of the dwarf elliptical (dE) galaxy NGC 1396 (MV = -16.60, Mass ∼4 × 108 M⊙), located in the Fornax cluster, have been performed with the Very Large Telescope/Multi Unit Spectroscopic Explorer spectrograph in the wavelength region from 4750 to 9350 Å. In this paper, we present a stellar population…
Striations in the Taurus molecular cloud: Kelvin-Helmholtz instability or MHD waves?
Falgarone, E.; Goldsmith, P. F.; Yıldız, U. A. +3 more
The origin of striations aligned along the local magnetic field direction in the translucent envelope of the Taurus molecular cloud is examined with new observations of 12CO and 13CO J = 2-1 emission obtained with the 10-m Submillimeter Telescope of the Arizona Radio Observatory. These data identify a periodic pattern of exce…
An enhanced fraction of starbursting galaxies among high Eddington ratio AGNs
Daddi, E.; Ciesla, L.; Mullaney, J. R. +2 more
We investigate the star-forming properties of 1620 X-ray selected active galactic nuclei (AGN) host galaxies as a function of their specific X-ray luminosity (I.e. X-ray luminosity per unit host stellar mass) - a proxy of the Eddington ratio. Our motivation is to determine whether there is any evidence of a suppression of star formation at high Ed…
Lightning climatology of exoplanets and brown dwarfs guided by Solar system data
Helling, Ch.; Hodosán, G.; Asensio-Torres, R. +2 more
Clouds form on extrasolar planets and brown dwarfs where lightning could occur. Lightning is a tracer of atmospheric convection, cloud formation and ionization processes as known from the Solar system, and may be significant for the formation of prebiotic molecules. We study lightning climatology for the different atmospheric environments of Earth…
The first observation of an intermediate flare from SGR 1935+2154
Hurley, K.; Zhang, X. -L.; Israel, G. L. +8 more
We report on the bright burst detected by four Interplanetary network (IPN) spacecraft on 2015 April 12. The IPN localization of the source is consistent with the position of the recently discovered soft gamma-repeater SGR 1935+2154. From the Konus-Wind (KW) observation, we derive temporal and spectral parameters of the emission, and the burst ene…
X-ray and radio emission from the luminous supernova 2005kd
Bauer, F. E.; Dwarkadas, V. V.; Romero-Cañizales, C. +1 more
SN 2005kd is among the most luminous supernovae (SNe) to be discovered at X-ray wavelengths. We have re-analysed all good angular resolution (better than 20 arcsec full width at half-maximum point spread function) archival X-ray data for SN 2005kd. The data reveal an X-ray light curve that decreases as t-1.62±0.06. Our modelling of the …
CFHTLenS and RCSLenS cross-correlation with Planck lensing detected in fourier and configuration space
Heymans, Catherine; Moutard, Thibaud; Harnois-Déraps, Joachim +13 more
We measure the cross-correlation signature between the Planck cosmic microwave background (CMB) lensing map and the weak lensing observations from both the Red-sequence Cluster Lensing Survey and the Canada-France-Hawaii Telescope Lensing Survey. In addition to a Fourier analysis, we include the first configuration-space detection, based on the es…
The accelerated build-up of the red sequence in high-redshift galaxy clusters
Demarco, R.; Lidman, C.; Huertas-Company, M. +6 more
We analyse the evolution of the red sequence in a sample of galaxy clusters at redshifts 0.8 < z < 1.5 taken from the HAWK-I Cluster Survey (HCS). The comparison with the low-redshift (0.04 < z < 0.08) sample of the WIde-field Nearby Galaxy-cluster Survey (WINGS) and other literature results shows that the slope and intrinsic scatter o…