Search Publications
XMM-Newton observations of the Small Magellanic Cloud: Be/X-ray binary pulsars active between October 2006 and June 2007
Pietsch, W.; Haberl, F.; Eger, P.
Aims: We analysed eight XMM-Newton observations toward the Small Magellanic Cloud (SMC), performed between October 2006 and June 2007, to investigate high mass X-ray binary systems.
Methods: We produced images from the European Photon Imaging Cameras (EPIC) and extracted X-ray spectra and light curves in different energy bands from sources tha…
An active region jet observed with Hinode
Young, P. R.; Mason, H. E.; Isobe, H. +4 more
Aims:We study the physical properties of an active region (AR) jet in order to probe the mechanisms responsible for it.
Methods: We report 2007 January 15/16 observations of a recurring jet situated on the west side of NOAA AR 10938. Multi-wavelength data from all three instruments onboard Hinode were analysed. This paper focuses on one instan…
First superburst from a classical low-mass X-ray binary transient
Brown, E. F.; in't Zand, J. J. M.; Kuulkers, E. +3 more
We report the analysis of the first superburst from a transiently accreting neutron star system with the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer. The superburst occurred 55 days after the onset of an accretion outburst in
Determining the LIC H density from the solar wind slowdown
Liu, Y.; McComas, D. J.; Wang, C. +1 more
Context: The ionized solar wind interacts directly with the interstellar neutrals which flow into the heliosphere. These neutrals are ionized, mainly by charge exchange, then accelerated to the solar wind speed with the momentum and energy removed from the bulk flow of the solar wind. Thus, by measuring the solar wind slowdown, one can estimate th…
Point spread functions for the Solar optical telescope onboard Hinode
Wedemeyer-Böhm, S.
Aims: We investigate the combined point spread function (PSF) of the Broadband Filter Imager (BFI) and the Solar Optical Telescope (SOT) onboard the Hinode spacecraft.
Methods: Observations of the Mercury transit from November 2006 and the solar eclipse(s) from 2007 are used to determine the PSFs of SOT for the blue, green, and red continuum c…
The impact of Spitzer infrared data on stellar mass estimates - and a revised galaxy stellar mass function at 0 < z < 5
Elsner, F.; Hopp, U.; Feulner, G.
Aims:We estimate stellar masses of galaxies in the high redshift universe with the intention of determining the influence of newly available Spitzer/IRAC infrared data on the analysis. Based on the results, we probe the mass assembly history of the universe.
Methods: We use the GOODS-MUSIC catalog, which provides multiband photometry from the …
Detection of sea-serpent field lines in sunspot penumbrae
Bellot Rubio, L. R.; Sainz Dalda, A.
Aims:We investigate the spatial distribution of magnetic polarities in the penumbra of a spot observed very close to disk center.
Methods: High angular and temporal resolution magnetograms taken with the Narrowband Filter Imager aboard Hinode are used in this study. They provide continuous and stable measurements in the photospheric Fe I 630.2…
Properties of the Galactic population of cataclysmic variables in hard X-rays
Sunyaev, R.; Krivonos, R.; Revnivtsev, M. +2 more
We measure the spatial distribution and hard X-ray luminosity function of cataclysmic variables (CVs) using the INTEGRAL all-sky survey in the 17-60 keV energy band. The vast majority of CVs detected by INTEGRAL are intermediate polars of luminosity in the range 1032-1034 erg s-1. The scale height of the Galactic d…
Intermediate long X-ray bursts from the ultra-compact binary candidate SLX 1737-282
Kuulkers, E.; Falanga, M.; Chenevez, J. +3 more
Aims: The low persistent flux X-ray burster source SLX 1737-282 is classified as an ultra-compact binary candidate. We compare the data on SLX 1737-282 with the other similar objects and attempt to derive constraints on the physical processes responsible for the formation of intermediate long bursts.
Methods: Up to now only four bursts, all wi…
The evolution of planetary nebulae. V. The diffuse X-ray emission
Steffen, M.; Schönberner, D.; Warmuth, A.
Context: Observations with space-borne X-ray telescopes revealed the existence of soft, diffuse X-ray emission from the inner regions of planetary nebulae. Although the existing images support the idea that this emission arises from the hot shocked central-star wind which fills the inner cavity of a planetary nebula, existing models have difficult…