Search Publications
The central parsecs of M87: jet emission and an elusive accretion disc
Espada, D.; Prieto, M. A.; González-Martín, O. +2 more
We present the first simultaneous spectral energy distribution (SED) of M87 core at a scale of 0.4 arcsec ( ∼ 32 pc) across the electromagnetic spectrum. Two separate, quiescent, and active states are sampled that are characterized by a similar featureless SED of power-law form, and that are thus remarkably different from that of a canonical activ…
Summer fireworks on comet 67P
Jorda, L.; Lamy, P. L.; Lara, L. M. +52 more
During its 2 yr mission around comet 67P/Churyumov-Gerasimenko, ESA's Rosetta spacecraft had the unique opportunity to follow closely a comet in the most active part of its orbit. Many studies have presented the typical features associated with the activity of the nucleus, such as localized dust and gas jets. Here, we report on series of more ener…
Detection of the kinematic Sunyaev-Zel'dovich effect with DES Year 1 and SPT
Benoit-Lévy, A.; Efstathiou, G.; D'Andrea, C. B. +82 more
We detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2σ by combining a cluster catalogue derived from the first year data of the Dark Energy Survey with cosmic microwave background temperature maps from the South Pole Telescope Sunyaev-Zel'dovich Survey. This measurement is performed with a differential stat…
A census of dense cores in the Taurus L1495 cloud from the Herschel
White, G. J.; André, Ph.; Könyves, V. +17 more
We present a catalogue of dense cores in a ∼4° × 2° field of the Taurus star-forming region, inclusive of the L1495 cloud, derived from Herschel SPIRE and PACS observations in the 70 µm, 160 µm, 250 µm, 350 µm, and 500 µm continuum bands. Estimates of mean dust temperature and total mass are derived using modified bla…
An all-sky support vector machine selection of WISE YSO candidates
McGehee, P.; Paladini, R.; Kun, M. +4 more
We explored the AllWISE catalogue of the Wide-field Infrared Survey Explorer (WISE) mission and identified Young Stellar Object (YSO) candidates. Reliable 2MASS and WISE photometric data combined with Planck dust opacity values were used to build our data set and to find the best classification scheme. A sophisticated statistical method, the suppo…
Star formation in quasar hosts and the origin of radio emission in radio-quiet quasars
Ho, Luis C.; Strauss, Michael A.; Heckman, Timothy M. +11 more
Radio emission from radio-quiet quasars may be due to star formation in the quasar host galaxy, to a jet launched by the supermassive black hole, or to relativistic particles accelerated in a wide-angle radiatively driven outflow. In this paper, we examine whether radio emission from radio-quiet quasars is a byproduct of star formation in their ho…
The star formation rate density from z = 1 to 6
Clements, David L.; Oliver, Seb; Vaccari, Mattia +6 more
We use 3035 Herschel-SPIRE 500 µm sources from 20.3 deg2 of sky in the HerMES Lockman, ES1 and XMM-LSS areas to estimate the star formation rate density at z = 0-6. 500 µm sources are associated first with 350 and 250 µm sources, and then with Spitzer 24 µm sources from the SWIRE photometric redshift catalogue. T…
Far-infrared and dust properties of present-day galaxies in the EAGLE simulations
Baes, Maarten; Schaye, Joop; Theuns, Tom +3 more
The Evolution and Assembly of GaLaxies and their Environments (EAGLE) cosmological simulations reproduce the observed galaxy stellar mass function and many galaxy properties. In this work, we study the dust-related properties of present-day EAGLE galaxies through mock observations in the far-infrared and submm wavelength ranges obtained with the 3…
NuSTAR catches the unveiling nucleus of NGC 1068
Harrison, F. A.; Stern, D.; Alexander, D. M. +15 more
We present a NuSTAR and XMM-Newton monitoring campaign in 2014/2015 of the Compton-thick Seyfert 2 galaxy, NGC 1068. During the 2014 August observation, we detect with NuSTAR a flux excess above 20 keV (32 ± 6 per cent) with respect to the 2012 December observation and to a later observation performed in 2015 February. We do not detect any spectra…
Interstellar extinction curve variations towards the inner Milky Way: a challenge to observational cosmology
Valenti, Elena; Wolf, Christian; Udalski, Andrzej +18 more
We investigate interstellar extinction curve variations towards ∼4 deg2 of the inner Milky Way in VIJKs photometry from the OGLE-III (third phase of the Optical Gravitational Lensing Experiment) and VVV (VISTA Variables in the Via Lactea) surveys, with supporting evidence from diffuse interstellar bands and F435W, F625W photo…