Search Publications
Allsky NICER and NICEST extinction maps based on the 2MASS near-infrared survey
Juvela, M.; Montillaud, J.
Context. Extinction remains one of the most reliable methods of measuring column density of nearby Galactic interstellar clouds. The current and ongoing near-infrared surveys enable the mapping of extinction over large sky areas.
Aims: We produce allsky extinction maps using the 2MASS near-infrared survey.
Methods: We use the NICER and N…
Measurement of the Integrated Sachs-Wolfe Effect Using the AllWISE Data Release
Wright, Edward L.; Shajib, Anowar J.
One of the physical features of a dark-energy-dominated universe is the integrated Sachs-Wolfe (ISW) effect on the cosmic microwave background (CMB) radiation, which gives us a direct observational window to detect and study dark energy. The AllWISE data release of the Wide-field Infrared Survey Explorer (WISE) has a large number of point sources …
Reconnection events in Saturn's magnetotail: Dependence of plasmoid occurrence on planetary period oscillation phase
Jackman, C. M.; Cowley, S. W. H.; Provan, G.
During its exploration of Saturn's magnetotail the Cassini magnetometer has detected many in situ examples of magnetic reconnection, in the form of plasmoids, traveling compression regions (TCRs), and dipolarizations. Meanwhile, many magnetospheric phenomena have been shown to be organized with particular regularity by planetary period oscillation…
The column density distribution of hard X-ray radio galaxies
Venturi, T.; Dallacasa, D.; Ubertini, P. +6 more
In order to investigate the role of absorption in active galactic nuclei (AGN) with jets, we have studied the column density distribution of a hard X-ray selected sample of radio galaxies, derived from the INTEGRAL/Imager on Board the Integral Satellite (IBIS) and Swift/The Burst Alert Telescope (BAT) AGN catalogues (∼7-10 per cent of the total AG…
Properties and Modeling of Unresolved Fine Structure Loops Observed in the Solar Transition Region by IRIS
Warren, Harry P.; Brooks, David H.; Reep, Jeffrey W.
Recent observations from the Interface Region Imaging Spectrograph (IRIS) have discovered a new class of numerous low-lying dynamic loop structures, and it has been argued that they are the long-postulated unresolved fine structures (UFSs) that dominate the emission of the solar transition region. In this letter, we combine IRIS measurements of th…
Observational signatures of past mass-exchange episodes in massive binaries: The case of HD 149 404
Martins, F.; Gosset, E.; Nazé, Y. +4 more
Context. Mass and momentum exchanges in close massive binaries play an important role in their evolution, and produce several observational signatures such as asynchronous rotation and altered chemical compositions, that remain after the stars detach again.
Aims: We investigated these effects for the detached massive O-star binary HD 149 404 …
Accurate parameters for HD 209458 and its planet from HST spectrophotometry
del Burgo, C.; Allende Prieto, C.
We present updated parameters for the star HD 209458 and its transiting giant planet. The stellar angular diameter θ = 0.2254 ± 0.0017 mas is obtained from the average ratio between the absolute flux observed with the Hubble Space Telescope and that of the best-fitting Kurucz model atmosphere. This angular diameter represents an improvement in pre…
Spectral and timing evolution of the bright failed outburst of the transient black hole Swift J174510.8-262411
Sbarufatti, B.; Homan, J.; Tomsick, J. A. +13 more
We studied time variability and spectral evolution of the Galactic black hole transient Swift J174510.8-262411 during the first phase of its outburst. INTEGRAL and Swift observations collected from 2012 September 16 until October 30 have been used. The total squared fractional rms values did not drop below 5 per cent and quasi-periodic oscillation…
Auroral evidence of radial transport at Jupiter during January 2014
Gray, R. L.; Badman, S. V.; Bonfond, B. +5 more
We present Jovian auroral observations from the 2014 January Hubble Space Telescope (HST) campaign and investigate the auroral signatures of radial transport in the magnetosphere alongside contemporaneous radio and Hisaki EUV data. HST FUV auroral observations on day 11 show, for the first time, a significantly superrotating polar spot poleward of…
Size growth of red-sequence early-type galaxies in clusters in the last 10 Gyr
Andreon, S.; Dong, Hui; Raichoor, A.
We carried out a photometric and structural analysis in the rest-frame V band of a mass-selected (log M/M⊙> 10.7) sample of red-sequence galaxies in 14 galaxy clusters, 6 of which are at z> 1.45, namely JKCS041, IDCS J1426.5+3508, SpARCS104922.6+564032.5, SpARCSJ021524-034331, XDCPJ0044.0-2033, and SPT-CLJ2040-4451. To this end, w…