Search Publications
Analysis of light curves of eclipsing systems with exoplanets: HD 189733
Cherepashchuk, A. M.; Abubekerov, M. K.; Gostev, N. Yu.
High-accuracy multicolor light curves of the binary system HD 189733, which contains an exoplanet, are analyzed. We have determined the radii of the star and the planet in the binary system, as well as the orbital inclination. The limb-darkening coefficients of the stellar disk were obtained in 10 filters in the wavelength interval λλ = 5500-10 50…
The Suzaku View of the Disk-Jet Connection in the Low-excitation Radio Galaxy NGC 6251
Hardcastle, M. J.; Croston, J. H.; Gandhi, P. +4 more
We present results from an 87 ks Suzaku observation of the canonical low-excitation radio galaxy (LERG) NGC 6251. We have previously suggested that LERGs violate conventional active galactic nucleus unification schemes: they may lack an obscuring torus and are likely to accrete in a radiatively inefficient manner, with almost all of the energy rel…
The Advanced Camera for Surveys+Wide Field Camera 3 Survey for Lyman Limit Systems. I. The Data
Prochaska, J. Xavier; Chen, Hsiao-Wen; Madau, Piero +1 more
We present a set of 71 quasars observed in the near ultraviolet with the PR200L prism on the Advanced Camera for Surveys and the G280 grism on the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope. The quasars were selected from the Sloan Digital Sky Survey data to search for intervening Lyman limit system (LLS) absorption. The sample…
MOIRCS Deep Survey. VII. NIR Morphologies of Star-Forming Galaxies at Redshift z 1
Ouchi, Masami; Tanaka, Ichi; Yamada, Toru +11 more
We investigated rest-frame near-infrared (NIR) morphologies of a sample of 139 galaxies with
Interferometric millimeter observations of water vapor on Mars and comparison with Mars Express measurements
Montmessin, Franck; Lellouch, Emmanuel; Fouchet, Thierry +3 more
We present interferometric mapping of the 225.9-GHz HDO and 203.4-GHz H2O lines on Mars obtained with the IRAM Plateau de Bure facility (PdBI). The observations were performed during martian year 28 (MY28), at Ls=320.3° for the HDO line, and at Ls=324.3° for the H2O line. The HDO line is detected at the …
On Asymmetry of Magnetic Helicity in Emerging Active Regions: High-resolution Observations
Alexander, David; Démoulin, Pascal; Zhu, Chunming +1 more
We employ the DAVE (differential affine velocity estimator) tracking technique on a time series of Michelson Doppler Imager (MDI)/1 minute high spatial resolution line-of-sight magnetograms to measure the photospheric flow velocity for three newly emerging bipolar active regions (ARs). We separately calculate the magnetic helicity injection rate o…
Oxygen airglow emission on Venus and Mars as seen by VIRTIS/VEX and OMEGA/MEX imaging spectrometers
Bibring, J. -P.; Gondet, B.; Bellucci, G. +8 more
Imaging spectrometers are highly effective instruments for investigation of planetary atmospheres. They present the advantage of coupling the compositional information to the spatial distribution, allowing simultaneous study of chemistry and dynamics in the atmospheres of Venus and Mars. In this work, we summarize recent results about the O 2…
Observation of the Cygnus OB2 Association with Suzaku and Long-Term Light Curves
Kitamoto, Shunji; Murakami, Hiroshi; Yoshida, Masaki
We obtained a Suzaku 41-ks observation of the four brightest early type stars in the Cygnus OB2 association (Cyg OB2 Nos. 5, 8a, 9, and 12). The spectra of two of the stars, Nos. 9 and 12, could be fitted by a two-temperature thin-thermal collisional-ionization equilibrium model, while those of Nos. 5 and 8a required a three-temperature model. Sta…
A comparison study between observations and simulation results of Barghouthi model for O+ and H+ outflows in the polar wind
Nilsson, H.; Barghouthi, I. A.; Ghithan, S. H.
To advance our understanding of the effect of wave-particle interactions on ion outflows in the polar wind region and the resulting ion heating and escape from low altitudes to higher altitudes, we carried out a comparison between polar wind simulations obtained using Barghouthi model with corresponding observations obtained from different satelli…
XMM-Newton observations of the X-ray soft polar QS Telescopii
Burwitz, V.; Dreizler, S.; Walter, F. M. +4 more
Context. On the basis of XMM-Newton observations, we investigate the energy balance of selected magnetic cataclysmic variables, which have shown an extreme soft-to-hard X-ray flux ratio in the ROSAT All-Sky Survey.
Aims: We intend to establish the X-ray properties of the system components, their flux contributions, and the accretion geometry …