Search Publications
A young star-forming galaxy at z = 3.5 with an extended Lyman α halo seen with MUSE
Bacon, Roland; Blaizot, Jérémy; Brinchmann, Jarle +12 more
Spatially resolved studies of high-redshift galaxies, an essential insight into galaxy formation processes, have been mostly limited to stacking or unusually bright objects. We present here the study of a typical (L*, M⋆ = 6 × 109 M⊙) young lensed galaxy at z = 3.5, observed with Multi Unit Spectroscopic Explorer (…
A deep XMM-Newton study of the hot gaseous halo around NGC 1961
Bregman, Joel N.; Churazov, Eugene; Anderson, Michael E.
We examine 11 XMM-Newton observations of the giant spiral galaxy NGC 1961, allowing us to study the hot gaseous halo of a spiral galaxy in unprecedented detail. We perform a spatial and a spectral analysis; with the former, the hot halo is detected to at least 80 kpc and with the latter its properties can be measured in detail up to 42 kpc. We fin…
AGN are cooler than you think: the intrinsic far-IR emission from QSOs
Oliver, S. J.; Page, M. J.; Symeonidis, M. +4 more
We present an intrinsic AGN spectral energy distribution (SED) extending from the optical to the submm, derived with a sample of unobscured, optically luminous (νLν,5100 > 1043.5 erg s-1) QSOs at z < 0.18 from the Palomar Green survey. The intrinsic AGN SED was computed by removing the contribution from stars…
Thermal SZ fluctuations in the ICM: probing turbulence and thermodynamics in Coma cluster with Planck
Khatri, Rishi; Gaspari, Massimo
We report the detection of thermal Sunyaev-Zeldovich (SZ) effect fluctuations in the intracluster medium (ICM) of Coma cluster observed with Planck. The SZ data links the maximum observable X-ray scale to the large Mpc scale, extending our knowledge of the power spectrum of ICM fluctuations. Deprojecting the 2D SZ perturbations into 3D pressure fl…
Hubble Frontier Fields: predictions for the return of SN Refsdal with the MUSE and GMOS spectrographs
Kneib, J. -P.; Smith, G. P.; Egami, E. +13 more
We present a high-precision mass model of the galaxy cluster MACS J1149.6+ 2223, based on a strong gravitational lensing analysis of Hubble Space Telescope Frontier Fields (HFF) imaging data and spectroscopic follow-up with Gemini/Gemini Multi-Object Spectrographs (GMOS) and Very Large Telescope (VLT)/Multi Unit Spectroscopic Explorer (MUSE). Our …
Massive star mergers and the recent transient in NGC 4490: a more massive cousin of V838 Mon and V1309 Sco
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Smith, Nathan +11 more
The Galactic transient V1309 Sco was the result of a merger in a low-mass star system, while V838 Mon was thought to be a similar merger event from a more massive B-type progenitor. In this paper, we study a recent optical and infrared (IR) transient discovered in the nearby galaxy NGC 4490 named NGC 4490-OT2011 (NGC 4490-OT hereafter), which appe…
Evolution of CO2, CH4, and OCS abundances relative to H2O in the coma of comet 67P around perihelion from Rosetta/VIRTIS-H observations
Kührt, E.; Encrenaz, T.; Erard, S. +19 more
Infrared observations of the coma of 67P/Churyumov-Gerasimenko were carried out from 2015 July to September, I.e. around perihelion (2015 August 13), with the high-resolution channel of the Visible and Infrared Thermal Imaging Spectrometer instrument onboard Rosetta. We present the analysis of fluorescence emission lines of H2O, CO…
Ionospheric plasma of comet 67P probed by Rosetta at 3 au from the Sun
Wurz, P.; Altwegg, K.; Glassmeier, K. -H. +23 more
We propose to identify the main sources of ionization of the plasma in the coma of comet 67P/Churyumov-Gerasimenko at different locations in the coma and to quantify their relative importance, for the first time, for close cometocentric distances (<20 km) and large heliocentric distances (>3 au). The ionospheric model proposed is used as an …
The SAMI Galaxy Survey: extraplanar gas, galactic winds and their association with star formation history
Kewley, Lisa J.; Kobayashi, Chiaki; Bland-Hawthorn, Joss +23 more
We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to understand the link between properties of the extraplanar gas and their host galaxies. The kinematics properties of the extraplanar gas, including velocity …
Structure and evolution of the diamagnetic cavity at comet 67P/Churyumov-Gerasimenko
Nilsson, H.; Eriksson, A.; Sierks, H. +13 more
The long duration of the Rosetta mission allows us to study the evolution of the diamagnetic cavity at comet 67P/Churyumov-Gerasimenko in detail. From 2015 April to 2016 February 665 intervals could be identified where Rosetta was located in a zero-magnetic-field region. We study the temporal and spatial distribution of this cavity and its boundar…