Search Publications
The 6-7 µm spectrum of Titan from ISO/SWS observations
Lellouch, Emmanuel; Feuchtgruber, Helmut; Courtin, Régis +1 more
We have analyzed spectroscopic observations of Titan performed in January 1997 by the Short Wavelength Spectrometer (SWS) on the Infrared Space Observatory in the wavelength range from 5.3 to 7.0 µm (1422-1890 cm-1). This spectral interval is of particular interest because it contains various molecular transitions, particularly th…
The XMM-Newton1 and INTEGRAL2 Observations of the Supergiant Fast X-Ray Transient IGR J16328-4726
Piro, L.; Bird, A. J.; Fiocchi, M. +6 more
The accretion mechanism producing the short flares observed from the Supergiant Fast X-ray Transients (SFXT) is still highly debated and forms a major part in our attempts to place these X-ray binaries in the wider context of the High Mass X-ray Binaries. We report on a 216 ks INTEGRAL observation of the SFXT IGR J16328-4726 (2014 August 24-27) si…
Chromospheric spicules and solar corona
Yakunina, G. V.; Porfir'eva, G. A.
Results of recent observations of chromospheric spicules on the Sun, obtained during the last decades, are briefly reviewed. Data on spicules of different types and their possible counterparts on the solar disk have been collected. Their properties, such as lifetimes, length, thickness, velocities, connection with underlying magnetic field and sup…
V620 Oph = CoRoT 104190253 - a misclassified RR Lyrae star
Benko, J. M.
The comptonization parameter from simulations of single-frequency, single-dish, dual-beam, cm-wave observations of galaxy clusters and mitigating CMB confusion using the Planck sky survey
Lew, Bartosz; Roukema, Boudewijn F.
Systematic effects in dual-beam, differential, radio observations of extended objects are discussed in the context of the One Centimeter Receiver Array (OCRA). We use simulated samples of Sunyaev-Zel'dovich (SZ) galaxy clusters at low (z < 0.4) and intermediate (0.4 < z < 1.0) redshifts to study the implications of operating at a single f…
Development of low-noise high-speed analog ASIC for X-ray CCD cameras and wide-band X-ray imaging sensors
Hayashida, Kiyoshi; Nakajima, Hiroshi; Anabuki, Naohisa +8 more
We report on the development and performance evaluation of the mixed-signal Application Specific Integrated Circuit (ASIC) developed for the signal processing of onboard X-ray CCD cameras and various types of X-ray imaging sensors in astrophysics. The quick and low-noise readout is essential for the pile-up free imaging spectroscopy with a future …
Iron emission line from the spiral galaxy M 101
Yamauchi, Shigeo
Archival Suzaku data of the face-on spiral galaxy M 101 were analyzed. An intense emission line at 6.72^{+0.10}_{-0.12}keV was detected in the central region. This line is identified with a K-line from He-like iron, which indicates the existence of a thin thermal plasma with a temperature of several keV. The iron line luminosity within the central…
Relationship between magnetic field properties and an X-class flare in active region NOAA 9077
Liu, D.; Liu, S.
The magnetic field plays a key role in producing solar flares, so that the investigation on the relationship between the magnetic field properties and flares is significant. In this paper, based on the magnetic field extrapolated from the photospheric vector magnetograms of the active region NOAA 9077 obtained at Huairou Solar Observing Station, t…
Constraints on the dark energy dipole from large-scale structures
Hurier, G.
The high-significance measurement of large-scale structure signals enables testing the isotropy of the Universe. The measurement of cosmological parameters through the large-scale distribution of matter is now a mature domain. This approach is mainly limited by our knowledge of astrophysical processes that are used to observe the large-scale struc…
From the Vega mission to comet Halley to the Rosetta mission to comet 67/P Churyumov-Gerasimenko
Zelenyi, L. M.; Ksanfomality, L. V.
The data acquired by the Vega and Giotto spacecraft, while investigating comet 1P/Halley in 1986, are compared to the results of the first phase of exploration of the nucleus of comet 67P/Churyumov-Gerasimenko performed with the Rosetta and Philae modules. The course of the Rosetta mission activity and the status of the modules after the Philae pr…