Search Publications
Sunyaev-Zel'dovich effect and X-ray scaling relations from weak lensing mass calibration of 32 South Pole Telescope selected galaxy clusters
Bayliss, M. B.; Schrabback, T.; von der Linden, A. +28 more
Uncertainty in mass-observable scaling relations is currently the limiting factor for galaxy-cluster-based cosmology. Weak gravitational lensing can provide direct mass calibration and reduce the mass uncertainty. We present new ground-based weak lensing observations of 19 South Pole Telescope (SPT) selected clusters at redshifts 0.29 ≤ z ≤ 0.61 a…
The magnetic early B-type stars - III. A main-sequence magnetic, rotational, and magnetospheric biography
Wade, G. A.; Neiner, C.; Shultz, M. E. +10 more
Magnetic confinement of stellar winds leads to the formation of magnetospheres, which can be sculpted into centrifugal magnetospheres (CMs) by rotational support of the corotating plasma. The conditions required for the CMs of magnetic early B-type stars to yield detectable emission in H α - the principal diagnostic of these structures - are poorl…
A public relativistic transfer function model for X-ray reverberation mapping of accreting black holes
Ingram, Adam; García, Javier A.; Mastroserio, Guglielmo +3 more
We present the publicly available model RELTRANS that calculates the light-crossing delays and energy shifts experienced by X-ray photons originally emitted close to the black hole when they reflect from the accretion disc and are scattered into our line of sight, accounting for all general relativistic effects. Our model is fast and flexible enou…
Gravitationally lensed quasars in Gaia - III. 22 new lensed quasars from Gaia data release 2
McMahon, Richard G.; Auger, Matthew W.; Lemon, Cameron A.
We report the discovery and spectroscopic confirmation of 22 new gravitationally lensed quasars found using Gaia data release 2. The selection was made using several techniques: multiple Gaia detections around objects in quasar candidate catalogues, modelling of unWISE coadd pixels using Gaia astrometry, and Gaia detections offset from photometric…
Gaia Cepheid parallaxes and 'Local Hole' relieve H0 tension
Metcalfe, N.; Shanks, T.; Hogarth, L. M.
There is an ≈9 ± 2.5 per cent tension between the value of Hubble's Constant, H0 = 67.4 ± 0.5 km s-1 Mpc-1, implied by the Planck microwave background power spectrum and that given by the distance scale of H0 = 73.4 ± 1.7 km s-1Mpc-1. But with a plausible assumption about a Gaia DR2…
On the slow solar wind with high Alfvénicity: from composition and microphysics to spectral properties
D'Amicis, Raffaella; Bruno, Roberto; Matteini, Lorenzo
Alfvénic fluctuations are very common features in the solar wind and are found especially within the main portion of fast-wind streams while the slow wind usually is less Alfvénic and more variable. In general, the fast and slow winds show many differences, which span from the large-scale structure to small-scale phenomena, including also a differ…
The spatial relation between young star clusters and molecular clouds in M51 with LEGUS
Tosi, M.; Gallagher, J. S.; Dale, D. A. +21 more
We present a study correlating the spatial locations of young star clusters with those of molecular clouds in NGC 5194, in order to investigate the time-scale over which clusters separate from their birth clouds. The star cluster catalogues are from the Legacy ExtraGalactic UV Survey (LEGUS) and the molecular clouds from the Plateau de Bure Intere…
Quantifying the impact of variable BLR diffuse continuum contributions on measured continuum interband delays
Korista, K. T.; Goad, M. R.
We investigate the contribution of reprocessed continuum emission (1000-10 000 Å) originating in broad-line region (BLR) gas, the diffuse continuum (DC), to the wavelength-dependent continuum delays measured in AGN disc reverberation mapping experiments. Assuming a spherical BLR geometry, we adopt a Local Optimally emitting Cloud (LOC) model for t…
Gone after one orbit: How cluster environments quench galaxies
Dolag, Klaus; Biviano, Andrea; Burkert, Andreas +2 more
The effect of galactic orbits on a galaxy's internal evolution within a galaxy cluster environment has been the focus of heated debate in recent years. To understand this connection, we use both the (0.5 Gpc)3 and the Gpc3 boxes from the cosmological hydrodynamical simulation set Magneticum Pathfinder. We investigate the velo…
The unbiased frequency of planetary signatures around single and binary white dwarfs using Spitzer and Hubble
Gänsicke, Boris T.; Wilson, Thomas G.; Farihi, Jay +1 more
This paper presents combined Spitzer IRAC and Hubble COS results for a double-blind survey of 195 single and 22 wide binary white dwarfs for infrared excesses and atmospheric metals. The selection criteria include cooling ages in the range 9 to 300 Myr, and hydrogen-rich atmospheres so that the presence of atmospheric metals can be confidently lin…