Search Publications
Diverse stellar haloes in nearby Milky Way mass disc galaxies
Bell, Eric F.; Holwerda, Benne W.; Monachesi, Antonela +4 more
We have examined the resolved stellar populations at large galactocentric distances along the minor axis (from 10 kpc up to between 40 and 75 kpc), with limited major axis coverage, of six nearby highly inclined Milky Way (MW) mass disc galaxies using Hubble Space Telescope data from the Galaxy haloes, Outer discs, Substructure, Thick discs, and S…
Host galaxies of luminous z ∼ 0.6 quasars: major mergers are not prevalent at the highest AGN luminosities
Wuyts, S.; Fontana, A.; Trump, J. +10 more
Galaxy interactions are thought to be one of the main triggers of active galactic nuclei (AGN), especially at high luminosities, where the accreted gas mass during the AGN lifetime is substantial. Evidence for a connection between mergers and AGN, however, remains mixed. Possible triggering mechanisms remain particularly poorly understood for lumi…
The VMC survey - XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids
Piatti, Andrés E.; de Grijs, Richard; Marconi, Marcella +13 more
The VISTA near-infrared YJKs survey of the Magellanic System (VMC) is collecting deep Ks-band time-series photometry of pulsating stars hosted by the two Magellanic Clouds and their connecting bridge. Here, we present Y, J, Ks light curves for a sample of 717 Small Magellanic Cloud (SMC) Classical Cepheids (CCs). T…
The search for failed supernovae with the Large Binocular Telescope: constraints from 7 yr of data
Kochanek, C. S.; Stanek, K. Z.; Adams, S. M. +1 more
We report updated results for the first 7 yr of our programme to monitor 27 galaxies within 10 Mpc using the Large Binocular Telescope to search for failed supernovae (SNe) - core collapses of massive stars that form black holes without luminous SNe. In the new data, we identify no new compelling candidates and confirm the existing candidate. Give…
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the Fourier space wedges of the final sample
Streblyanska, Alina; Brownstein, Joel R.; Eisenstein, Daniel J. +25 more
We extract cosmological information from the anisotropic power-spectrum measurements from the recently completed Baryon Oscillation Spectroscopic Survey (BOSS), extending the concept of clustering wedges to Fourier space. Making use of new fast-Fourier-transform-based estimators, we measure the power-spectrum clustering wedges of the BOSS sample b…
A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission
Genzel, R.; Hailey, C.; Harrison, F. +21 more
We present the first fully simultaneous fits to the near-infrared (NIR) and X-ray spectral slope (and its evolution) during a very bright flare from Sgr A*, the supermassive black hole at the Milky Way's centre. Our study arises from ambitious multiwavelength monitoring campaigns with XMM-Newton, NuSTAR and SINFONI. The average multiwavelength spe…
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: on the measurement of growth rate using galaxy correlation functions
Brownstein, Joel R.; Ho, Shirley; Eisenstein, Daniel J. +16 more
We present a measurement of the linear growth rate of structure, f, from the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) using convolution Lagrangian perturbation theory (CLPT) with Gaussian streaming redshift space distortions (GSRSD) to model the two-point statistics of BOSS galax…
Fundamental parameters and infrared excesses of Tycho-Gaia stars
Zijlstra, A. A.; McDonald, I.; Watson, R. A.
Effective temperatures and luminosities are calculated for 1475 921 Tycho-2 and 107 145 Hipparcos stars, based on distances from Gaia Data Release 1. Parameters are derived by comparing multi-wavelength archival photometry to bt-settl model atmospheres. The 1σ uncertainties for the Tycho-2 and Hipparcos stars are ±137 and ±125 K in temperature and…
From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link
Fabian, A. C.; Pinto, C.; Soria, R. +8 more
In recent work with high-resolution reflection grating spectrometers (RGS) aboard XMM-Newton, Pinto et al. have discovered that two bright and archetypal ultraluminous X-ray sources (ULXs) have strong relativistic winds in agreement with theoretical predictions of high accretion rates. It has been proposed that such winds can become optically thic…
SONS: The JCMT legacy survey of debris discs in the submillimetre
Matthews, Brenda C.; Duchêne, Gaspard; Chen, Christine H. +32 more
Debris discs are evidence of the ongoing destructive collisions between planetesimals, and their presence around stars also suggests that planets exist in these systems. In this paper, we present submillimetre images of the thermal emission from debris discs that formed the SCUBA-2 Observations of Nearby Stars (SONS) survey, one of seven legacy su…