Search Publications
The Herschel Virgo Cluster Survey. XIII. Dust in early-type galaxies
Bianchi, S.; Fritz, J.; De Looze, I. +16 more
Aims: We study the dust content of a large optical input sample of 910 early-type galaxies (ETG) in the Virgo cluster, also extending to the dwarf ETG, and examine the results in relation to those on the other cold ISM components.
Methods: We have searched for far-infrared emission in all galaxies in the input sample using the 250 µ…
Symbiotic stars and other Hα emission-line stars towards the Galactic bulge
Udalski, Andrzej; Miszalski, Brent; Mikołajewska, Joanna
Symbiotic stars are interacting binaries with the longest orbital periods, and their multicomponent structure makes them rich astrophysical laboratories. The accretion of a high-mass-loss-rate red giant wind on to a white dwarf (WD) makes them promising Type Ia supernova (SN Ia) progenitors. Systematic surveys for new Galactic symbiotic stars are …
Numerical Simulations of Solar Chromospheric Jets Associated with Emerging Flux
Shibata, Kazunari; Takasao, Shinsuke; Isobe, Hiroaki
We studied the acceleration mechanisms of chromospheric jets associated with emerging flux using a two-dimensional magnetohydrodynamic (MHD) simulation. We found that slow-mode shock waves generated by magnetic reconnection in the chromosphere and the photosphere play key roles in the acceleration mechanisms of chromospheric jets. An important par…
The LYRA Instrument Onboard PROBA2: Description and In-Flight Performance
Schmutz, W.; Shapiro, A. I.; Zhukov, A. N. +7 more
The Large Yield Radiometer (LYRA) is an XUV-EUV-MUV (soft X-ray to mid-ultraviolet) solar radiometer onboard the European Space Agency Project for On-Board Autonomy 2 (PROBA2) mission, which was launched in November 2009. LYRA acquires solar-irradiance measurements at a high cadence (nominally 20 Hz) in four broad spectral channels, from soft X-ra…
SPT-CL J0205-5829: A z = 1.32 Evolved Massive Galaxy Cluster in the South Pole Telescope Sunyaev-Zel'dovich Effect Survey
Gladders, M. D.; Rest, A.; Foley, R. J. +80 more
The galaxy cluster SPT-CL J0205-5829 currently has the highest spectroscopically confirmed redshift, z = 1.322, in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. XMM-Newton observations measure a core-excluded temperature of TX = 8.7+1.0 -0.8 keV producing a mass estimate that is consistent with the S…
Constraints on neutrino masses from Planck and Galaxy clustering data
Ho, Shirley; Mena, Olga; Giusarma, Elena +1 more
We present here bounds on neutrino masses from the combination of recent Planck cosmic microwave background (CMB) measurements and galaxy clustering information from the Baryon Oscillation Spectroscopic Survey, part of the Sloan Digital Sky Survey-III. We use the full shape of either the photometric angular clustering (Data Release 8) or the 3D sp…
Solar cycle effects on the ion escape from Mars
Barabash, S.; Lundin, R.; Holmström, M. +6 more
Solar cycle effects on the escape of planetary ions from Mars are investigated using Mars Express Analyzer of Space Plasmas and Energetic Atoms 3 data from June 2007 to January 2013. Average and median tail fluxes of low-energy (<300 eV) heavy ions (O+, O2+), derived from the full data set covering 7900 orbits, …
The Chandra-COSMOS survey - IV. X-ray spectra of the bright sample
Salvato, M.; Merloni, A.; Fiore, F. +14 more
We present the X-ray spectral analysis of the 390 brightest extragalactic sources in the Chandra-Cosmic Evolution Survey catalogue, showing at least 70 net counts in the 0.5-7 keV band. This sample has a 100 per cent completeness in optical-infrared identification, with ∼75 per cent of the sample having a spectroscopic redshift and ∼25 per cent a …
Low frequency follow up of radio haloes and relics in the GMRT Radio Halo Cluster Survey
Brunetti, G.; Giacintucci, S.; Venturi, T. +4 more
Aims: To gain insight into the origin of diffuse radio sources in galaxy clusters and their connection with cluster merger processes, we performed GMRT low frequency observations of the radio haloes, relics and new candidates belonging to the GMRT radio Halo cluster sample first observed at 610 MHz. Our main aim was to investigate their obser…
Innocent Bystanders: Carbon Stars from the Sloan Digital Sky Survey
Green, Paul
Among stars showing carbon molecular bands (C stars), the main-sequence dwarfs, likely in post-mass transfer binaries, are numerically dominant in the Galaxy. Via spectroscopic selection from the Sloan Digital Sky Survey, we retrieve 1220 high galactic latitude C stars, ~5 times more than previously known, including a wider variety than past techn…