Search Publications
A long-term study of AGN X-ray variability . Structure function analysis on a ROSAT-XMM quasar sample
Bianchi, S.; Paolillo, M.; Middei, R. +3 more
Context. Variability in the X-rays is a key ingredient in understanding and unveiling active galactic nuclei (AGN) properties. In this band, flux variations occur on short timescales (hours) as well as on larger timescales. While short timescale variability is often investigated in single source studies, only a few works are able to explore flux v…
Ionized Gas Outflows in Infrared-bright Dust-obscured Galaxies Selected with WISE and SDSS
Toba, Yoshiki; Nagao, Tohru; Wang, Wei-Hao +5 more
We present the ionized gas properties of infrared (IR)-bright dust-obscured galaxies (DOGs) that show an extreme optical/IR color, {(i-[22])}{AB}> 7.0, selected with the Sloan Digital Sky Survey (SDSS) and Wide-field Infrared Survey Explorer (WISE). For 36 IR-bright DOGs that show [O III]λ5007 emission in the SDSS spectra, we perform…
A detection of wobbling brightest cluster galaxies within massive galaxy clusters
Kneib, J. P.; Harvey, David; Courbin, F. +1 more
A striking signal of dark matter beyond the standard model is the existence of cores in the centre of galaxy clusters. Recent simulations predict that a brightest cluster galaxy (BCG) inside a cored galaxy cluster will exhibit residual wobbling due to previous major mergers, long after the relaxation of the overall cluster. This phenomenon is abse…
Testing giant planet formation in the transitional disk of SAO 206462 using deep VLT/SPHERE imaging
Quanz, S. P.; Henning, T.; Ginski, C. +42 more
Context. The SAO 206462 (HD 135344B) disk is one of the few known transitional disks showing asymmetric features in scattered light and thermal emission. Near-infrared scattered-light images revealed two bright outer spiral arms and an inner cavity depleted in dust. Giant protoplanets have been proposed to account for the disk morphology.
Aim…
First Results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS): Kinematics of Lensed Galaxies at Cosmic Noon
Fontana, Adriano; Schmidt, Kasper B.; Treu, Tommaso +12 more
We present the first results of the K-band Multi-Object Spectrometer (KMOS) Lens-Amplified Spectroscopic Survey, a new ESO Very Large Telescope large program, doing multi-object integral field spectroscopy of galaxies gravitationally lensed behind seven galaxy clusters selected from the Hubble Space Telescope (HST) Grism Lens-Amplified Survey from…
A novel approach to quantifying the sensitivity of current and future cosmological datasets to the neutrino mass ordering through Bayesian hierarchical modeling
Mena, Olga; Gerbino, Martina; Lattanzi, Massimiliano +1 more
We present a novel approach to derive constraints on neutrino masses, as well as on other cosmological parameters, from cosmological data, while taking into account our ignorance of the neutrino mass ordering. We derive constraints from a combination of current as well as future cosmological datasets on the total neutrino mass Mν and on…
MASCARA-1 b. A hot Jupiter transiting a bright mV = 8.3 A-star in a misaligned orbit
Snellen, I. A. G.; Grundahl, F.; Albrecht, S. +11 more
We report the discovery of MASCARA-1 b, which is the first exoplanet discovered with the Multi-site All-Sky CAmeRA (MASCARA). This exoplanet is a hot Jupiter orbiting a bright mV = 8.3, rapidly rotating (vsini⋆ > 100 km s-1) A8 star with a period of 2.148780 ± 8 × 10-6 days. The planet has a mass and …
The Clouds are breaking: tracing the Magellanic system with Gaia DR1 Mira variables
Erkal, Denis; Belokurov, Vasily; Mackey, Dougal +2 more
We exploit the first data release from the Gaia mission to identify candidate Mira variables in the outskirts of the Magellanic Clouds. The repeated observations of sources during the initial phase of the Gaia mission is used to identify stars that show signs of variability. This variability information, combined with infrared photometry from Two …
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: angular clustering tomography and its cosmological implications
Brownstein, Joel R.; Thomas, Daniel; Prada, Francisco +17 more
We investigate the cosmological implications of studying galaxy clustering using a tomographic approach applied to the final Baryon Oscillation Spectroscopic Survey (BOSS) DR12 galaxy sample, including both auto- and cross-correlation functions between redshift shells. We model the signal of the full shape of the angular correlation function, ω(θ)…
Complete reionization constraints from Planck 2015 polarization
Heinrich, Chen He; Miranda, Vinicius; Hu, Wayne
We conduct an analysis of the Planck 2015 data that is complete in reionization observables from the large angle polarization E -mode spectrum in the redshift range 6 <z <30 . Based on 5 principal components, all of which are constrained by the data, this single analysis can be used to infer constraints on any model for reionization in the s…