Search Publications
Revisiting the role of the thermally pulsating asymptotic-giant-branch phase in high-redshift galaxies
Daddi, Emanuele; Maraston, Claudia; Renzini, Alvio +3 more
We study the debated contribution from thermally pulsing asymptotic-giant-branch (TP-AGB) stars in evolutionary population synthesis models. We investigate the spectral energy distributions (SEDs) of a sample of 51 spectroscopically confirmed, high-z (1.3 < zspec < 2.7), galaxies using three evolutionary population synthesis model…
Cosmic infrared background anisotropies as a window into primordial non-Gaussianity
Kunz, Martin; Tucci, Marco; Desjacques, Vincent
The angular power spectrum of the cosmic infrared background (CIB) is a sensitive probe of the local primordial bispectrum. CIB measurements are integrated over a large volume so that the scale-dependent bias from the primordial non-Gaussianity leaves a strong signal in the CIB power spectrum. Although Galactic dust dominates over the non-Gaussian…
Gaussianization for fast and accurate inference from cosmological data
Peiris, Hiranya V.; Joachimi, Benjamin; Schuhmann, Robert L.
We present a method to transform multivariate unimodal non-Gaussian posterior probability densities into approximately Gaussian ones via non-linear mappings, such as Box-Cox transformations and generalizations thereof. This permits an analytical reconstruction of the posterior from a point sample, like a Markov chain, and simplifies the subsequent…
Ionized gas kinematics within the inner kiloparsec of the Seyfert galaxy NGC 1365
Robinson, Andrew; Schnorr-Müller, Allan; Storchi-Bergmann, Thaisa +3 more
We observed the nuclear region of the galaxy NGC 1365 with the integral field unit of the Gemini Multi Object Spectrograph mounted on the GEMINI-South telescope. The field of view covers 13 × 6 arcsec2(1173 × 541 pc2) centred on the nucleus, at a spatial resolution of 52 pc. The spectral coverage extends from 5600 to 7000 Å, …
The clustering evolution of dusty star-forming galaxies
Baugh, Carlton M.; Cole, Shaun; Lacey, Cedric G. +1 more
We present predictions for the clustering of galaxies selected by their emission at far-infrared (FIR) and sub-millimetre wavelengths. This includes the first predictions for the effect of clustering biases induced by the coarse angular resolution of single-dish telescopes at these wavelengths. We combine a new version of the GALFORM model of gala…
The overmassive black hole in NGC 1277: new constraints from molecular gas kinematics
Krips, M.; Combes, F.; Scharwächter, J. +2 more
We report the detection of CO(1-0) emission from NGC 1277, a lenticular galaxy in the Perseus Cluster. NGC 1277 has previously been proposed to host an overmassive black hole (BH) compared to the galaxy bulge luminosity (mass), based on stellar-kinematic measurements. The CO(1-0) emission, observed with the IRAM Plateau de Bure Interferometer (PdB…
Testing gravity at large scales with H I intensity mapping
Pourtsidou, Alkistis
We investigate the possibility of testing Einstein's general theory of relativity (GR) and the standard cosmological model via the EG statistic using neutral hydrogen (H I) intensity mapping. We generalize the Fourier space estimator for EG to include H I as a biased tracer of matter and forecast statistical errors using H I …
A high mass progenitor for the Type Ic Supernova 2007gr inferred from its environment
Ramirez-Ruiz, Enrico; Maund, Justyn R.
We present an analysis of late-time Hubble Space Telescope Wide Field Camera 3 (WFC3) and Wide Field Planetary Camera 2 (WFPC2) observations of the site of the Type Ic supernova (SN) 2007gr in NGC 1058. The SN is barely recovered in the late-time WFPC2 observations, while a possible detection in the later WFC3 data is debatable. These observations…
Examining molecular clouds in the Galactic Centre region using X-ray reflection spectra simulations
Terrier, R.; Goldwurm, A.; Chernyakova, M. +1 more
In the centre of our Galaxy lies a supermassive black hole, identified with the radio source Sagittarius A⋆. This black hole has an estimated mass of around 4 million solar masses. Although Sagittarius A⋆ is quite dim in terms of total radiated energy, having a luminosity that is a factor of 1010 lower than its Edd…
Catching jetted tidal disruption events early in millimetre
Yuan, Qiang; Wang, Q. Daniel; Zhang, Bing +2 more
Relativistic jets can form from at least some tidal disruption events (TDEs) of (sub-)stellar objects around supermassive black holes. We detect the millimetre (MM) emission of IGR J12580+0134 - the nearest TDE known in the galaxy NGC 4845 at the distance of only 17 Mpc, based on Planck all-sky survey data. The data show significant flux jumps aft…