Search Publications
Density and lithospheric thickness of the Tharsis Province from MEX MaRS and MRO gravity data
Pätzold, M.; Rosenblatt, P.; Le Maistre, S. +2 more
Radio science tracking of Mars Express (MaRS experiment) and Mars Reconnaissance Orbiter produced high resolution Martian gravity data. Applying localized spectral analysis on the new gravity data sets, we study the surface density and lithospheric elastic thickness in the Tharsis province. The gravity signal is predicted with geophysical models e…
Spectral and petrologic analyses of basaltic sands in Ka'u Desert (Hawaii) - implications for the dark dunes on Mars
Jaumann, Ralf; Tirsch, Daniela; Helbert, Jörn +3 more
The spectral energy distributions, host galaxies and environments of variability-selected active galactic nuclei in GOODS-South
Koekemoer, Anton; Sarajedini, Vicki; Villforth, Carolin
Variability selection has been proposed as a powerful tool for identifying both low-luminosity active galactic nuclei (AGN) and those with unusual spectral energy distributions. However, a systematic study of sources selected in such a way has been lacking. In this paper, we present the multiwavelength properties of the variability-selected AGN in…
X-ray emitting hot plasma in solar active regions observed by the SphinX spectrometer
Miceli, M.; Reale, F.; Sylwester, J. +7 more
Aims: The detection of very hot plasma in the quiescent corona is important for diagnosing heating mechanisms. The presence and the amount of such hot plasma is currently debated. The SphinX instrument on-board the CORONAS-PHOTON mission is sensitive to X-ray emission of energies well above 1 keV and provides the opportunity to detect the hot…
Characterization of the non-Gaussianity of radio and IR point sources at CMB frequencies
Aghanim, N.; Kunz, M.; Lacasa, F. +1 more
This study, using publicly available simulations, focuses on the characterization of the non-Gaussianity produced by radio point sources and by infrared (IR) sources in the frequency range of the cosmic microwave background from 30 to 350 GHz.
We propose a simple prescription to infer the angular bispectrum from the power spectrum of point so…The very low mass multiple system LHS 1070. A testbed for model atmospheres for the lower end of the main sequence
Schultheis, M.; Ryde, N.; Leinert, Ch. +8 more
Context. LHS 1070 is a nearby multiple system of low mass stars. It is an important source of information for probing the low mass end of the main sequence, down to the hydrogen-burning limit. The primary of the system is a mid-M dwarf and two components are late-M to early L dwarfs, at the star-brown dwarf transition. Hence LHS 1070 is a valuable…
Searching for massive outflows in Holmberg IX X-1 and NGC 1313 X-1: the iron K band
Fabian, A. C.; Miller, J. M.; Reis, R. C. +1 more
We have analysed all the good quality XMM-Newton data publicly available for the bright ultraluminous X-ray sources Holmberg IX X-1 and NGC 1313 X-1, with the aim of searching for discrete emission or absorption features in the Fe K band that could provide observational evidence for the massive outflows predicted if these sources are accreting at …
Calibrating the projection factor for Galactic Cepheids
Marengo, M.; Nardetto, N.; Ngeow, C. -C. +1 more
Context. The projection factor (p), which converts the radial velocity to pulsational velocity, is an important parameter in the Baade-Wesselink (BW) type analysis and distance scale work. The p-factor is either adopted as a constant or linearly depending on the logarithmic of pulsating periods.
Aims: The aim of this work is to calibrate the …
The Quiescent X-Ray Properties of the Accreting Millisecond X-Ray Pulsar and Eclipsing binary Swift J1749.4-2807
Degenaar, N.; Wijnands, R.; Patruno, A.
Swift J1749.4-2807 is a transient neutron star low-mass X-ray binary that contains an accreting millisecond X-ray pulsar spinning at 518 Hz. It is the first of its kind that displays X-ray eclipses, which holds significant promise to precisely constrain the mass of the neutron star. We report on a ~= 105 ks long XMM-Newton observation performed wh…
A Flux-limited Sample of z ~ 1 Lyα Emitting Galaxies in the Chandra Deep Field South
Barger, A. J.; Cowie, L. L.; Wold, I. G. B.
We describe a method for obtaining a flux-limited sample of Lyα emitters from Galaxy Evolution Explorer (GALEX) grism data. We show that the multiple GALEX grism images can be converted into a three-dimensional (two spatial axes and one wavelength axis) data cube. The wavelength slices may then be treated as narrowband images and searched for emis…