Search Publications
Supersoft sources in M 31: Comparing the XMM-Newton deep survey, ROSAT and Chandra catalogues
Stiele, H.; Pietsch, W.; Haberl, F. +3 more
To investigate the transient nature of supersoft sources (SSSs) in
Method for analyzing the spatial distribution of galaxies on gigaparsec scales. II. Application to a grid of the HUDF-FDF-COSMOS-HDF surveys
Nabokov, N. V.; Baryshev, Yu. V.
Using the deep fields of COSMOS, FDF, HUDF, and HDF-N as an example, we discuss the prospects for and limitations on the method for searching for superlarge structures in the spatial distribution of galaxies proposed in the preceding article of this series. An analysis of the distribution N(z) of photometric redshifts in a grid of the deep fields …
Propagation of Jovian electron jets in heliospheric flux tube structures
Heber, B.; Kopp, A.; Dunzlaff, P.
We discuss the propagation of magnetic flux tubes of solar origin through the heliosphere up to the orbit of Jupiter and the possibility that Jovian electron jets result from the interaction of these flux tubes with the magnetosphere of Jupiter. In order to do so, we analyze Ulysses observations in the interplanetary medium along the spacecraft's …
Attitude and angular rates of planetary probes during atmospheric descent: Implications for imaging
Lorenz, Ralph D.
Attitude dynamics data from planetary missions are reviewed to obtain a zeroth-order expectation on the tilts and angular rates to be expected on atmospheric probes during descent: these rates are a strong driver on descent imager design. While recent Mars missions have been equipped with capable inertial measurements, attitude measurements for mi…
Investigation of oxygen O2(a1Δ g ) emission on the nightside of Venus: Nadir data of the VIRTIS-M experiment of the Venus Express mission
Drossart, P.; Piccioni, G.; Shakun, A. V. +2 more
The paper is devoted to studies of the oxygen 1.27 µm emission on the Venus nightside using nadir measurements with the imaging spectrometer VIRTIS. A map of the emission distribution in coordinates latitude-local time is drawn for the southern hemisphere, equatorial region, and low latitudes of the northern hemisphere on the basis of observ…
Suzaku Observations of the Great Annihilator and the Surrounding Diffuse Emissions
Koyama, Katsuji; Nobukawa, Masayoshi; Nakashima, Shinya +2 more
We report the Suzaku observation of 1E 1740.7-2942, a black hole candidate called the "Great Annihilator" (GA). The high-quality spectrum of Suzaku provides the severest constraints on the parameters of the GA. Two clumpy structures are found around the GA in the line images of FeI Kalpha at 6.4 keV and SXV Kalpha at 2.45 keV. One clump named M359…
Search for outbursts in the narrow 511-keV line from compact sources based on INTEGRAL data
Tsygankov, S. S.; Churazov, E. M.
We present the results of a systematic search for outbursts in the narrow positron annihilation line on various time scales (5 × 104-106 s) based on the SPI/INTEGRAL data obtained from 2003 to 2008. We show that no outbursts were detected with a statistical significance higher than ∼6 σ for any of the time scales considered o…
Absolute Dimensions and Apsidal Motion of the Young Detached System LT Canis Majoris
Bilir, Selçuk; Demircan, Osman; Bakiş, Volkan +3 more
New high-resolution spectra of the short-period (P ∼ 1.76 days) young detached binary LT CMa are reported for the first time. By combining the results from an analysis of new radial-velocity curves and published light curves, we determine values for the masses, radii, and temperatures as follows: M1 = 5.59 (0.20) Modot, R
VLT/NACO near-infrared imaging and spectroscopy of N88A in the SMC
Heydari-Malayeri, M.; Kristensen, L. E.; Lemaire, J. L. +3 more
Aims: We present near-infrared imaging and spectroscopic high spatial resolution observations of the SMC region N88 containing the bright, excited, extincted and compact H II region N88A of the size of about 1 pc.
Methods: To investigate its stellar content and reddening, N88 was observed using spectroscopy and imagery in the JHKs- and L…
Observed Scaling Relations for Strong Lensing Clusters: Consequences for Cosmology and Cluster Assembly
Natarajan, Priyamvada; Comerford, Julia M.; Moustakas, Leonidas A.
Scaling relations of observed galaxy cluster properties are useful tools for constraining cosmological parameters as well as cluster formation histories. One of the key cosmological parameters, σ8, is constrained using observed clusters of galaxies, although current estimates of σ8 from the scaling relations of dynamically re…