Search Publications
Effective field theory of dark matter: a global analysis
Calore, Francesca; Bertone, Gianfranco; Trotta, Roberto +4 more
We present global fits of an effective field theory description of real, and complex scalar dark matter candidates. We simultaneously take into account all possible dimension 6 operators consisting of dark matter bilinears and gauge invariant combinations of quark and gluon fields. We derive constraints on the free model parameters for both the re…
A Normal Supermassive Black Hole in NGC 1277
Marconi, Alessandro; Graham, Alister W.; Scott, Nicholas +5 more
The identification of galaxies with “overly massive” black holes requires two measurements: a black hole mass (Mbh) and a host spheroid mass ({M}{{sph,\ast }}). Here we provide our measurements for NGC 1277. Our structural decomposition reveals that NGC 1277 is dominated by a “classical” spheroid with a Sérsic index n = 5.3, …
Is there any evidence that ionized outflows quench star formation in type 1 quasars at z < 1?
Maiolino, R.; Marconi, A.; Brusa, M. +6 more
Aims: The aim of this paper is to test the basic model of negative active galactic nuclei (AGN) feedback. According to this model, once the central black hole accretes at the Eddington limit and reaches a certain critical mass, AGN driven outflows blow out gas, suppressing star formation in the host galaxy and self-regulating black hole growt…
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…
A Hubble Space Telescope Survey for Novae in M87. I. Light and Color Curves, Spatial Distributions, and the Nova Rate
Welch, D. L.; Lauer, Tod R.; Mikołajewska, Joanna +6 more
The Hubble Space Telescope has imaged the central part of M87 over a 10 week span, leading to the discovery of 32 classical novae (CNe) and nine fainter, likely very slow, and/or symbiotic novae. In this first paper of a series, we present the M87 nova finder charts, and the light and color curves of the novae. We demonstrate that the rise and dec…
Joint resonant CMB power spectrum and bispectrum estimation
Meerburg, P. Daniel; Wandelt, Benjamin; Münchmeyer, Moritz
We develop the tools necessary to assess the statistical significance of resonant features in the CMB correlation functions, combining power spectrum and bispectrum measurements. This significance is typically addressed by running a large number of simulations to derive the probability density function (PDF) of the feature-amplitude in the Gaussia…
The XXL Survey. VI. The 1000 brightest X-ray point sources
Chiappetti, L.; Paltani, S.; Lidman, C. +36 more
Context. X-ray extragalactic surveys are ideal laboratories for the study of the evolution and clustering of active galactic nuclei (AGN). Usually, a combination of deep and wide surveys is necessary to create a complete picture of the population. Deep X-ray surveys provide the faint population at high redshift, while wide surveys provide the rare…
The Intermediate Luminosity Optical Transient SN 2010da: The Progenitor, Eruption, and Aftermath of a Peculiar Supergiant High-mass X-Ray Binary
Berger, E.; Brown, P. J.; Chornock, R. +7 more
We present optical spectroscopy, ultraviolet-to-infrared imaging, and X-ray observations of the intermediate luminosity optical transient (ILOT) SN 2010da in NGC 300 (d = 1.86 Mpc) spanning from -6 to +6 years relative to the time of outburst in 2010. Based on the light-curve and multi-epoch spectral energy distributions of SN 2010da, we conclude …
Magnetic Field in Atypical Prominence Structures: Bubble, Tornado, and Eruption
Schmieder, B.; Labrosse, N.; Dalmasse, K. +3 more
Spectropolarimetric observations of prominences have been obtained with the THEMIS telescope during four years of coordinated campaigns. Our aim is now to understand the conditions of the cool plasma and magnetism in “atypical” prominences, namely when the measured inclination of the magnetic field departs, to some extent, from the predominantly h…
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…