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Statistical analysis of solar wind parameter variation with heliospheric distance: Ulysses observations in the ecliptic plane
Bolzan, M. J. A.; Echer, E.; Franco, A. M. S.
The interplanetary magnetic field magnitude Bo, proton density Np and solar wind speed Vsw data from Ulysses spacecraft during its interplanetary cruise interval from Earth to Jupiter, from 18 November 1990 to 31 January 1992, are analyzed in this study. Statistical and wavelet techniques are employed to characteri…
Chandra observations of the planetary nebula IC 4593
Bianchi, L.; Chu, Y. -H.; Guerrero, M. A. +2 more
The Advanced CCD Imaging Spectrometer (ACIS-S) camera on board the Chandra X-ray Observatory has been used to discover a hot bubble in the planetary nebula (PN) IC 4593, the most distant PN detected by Chandra so far. The data are used to study the distribution of the X-ray-emitting gas in IC 4593 and to estimate its physical properties. The hot b…
Morphological and morphometric analysis of a topographic depression near Huygens basin, Mars: Identification of a putative endorheic playa
Singh, Deepali; Singh, Priyadarshini; Roy, Nidhi +1 more
Inter-crater depressions on Mars, which may be host to candidate lakes, have not been explored in much detail. Even if a small percentage of these depressions were actually filled with water, it would mean that Mars was hydrologically more active than previously thought. The present study examined valley networks within the equatorial region of Ma…
Saturn's C ring and Cassini division: Particle sizes from Cassini UVIS, VIMS, and RSS occultations
Nicholson, Philip D.; French, Richard G.; Hedman, Matthew M. +4 more
Saturn's C ring and Cassini Division share many morphological traits: both contain numerous opaque, sharp-edged ringlets and gaps, broader low optical depth "background" regions, larger-optical depth regions that rise abruptly from the background (known as the C ring's plateaus and the Cassini Division's triple band feature), and linear ramps in o…
On the Geometry of the X-ray emission from pulsars a consistent inclination and beaming solution for the Be/X-ray pulsar SXP 1062
Zezas, A.; Coe, M. J.; Roy, A. +4 more
SXP 1062 is a long-period X-ray pulsar (XRP) with a Be optical companion located in the Small Magellanic Cloud. First discovered in 2010 from XMM-Newton data, it has been the target of multiple observational campaigns due to the seeming incongruity between its long spin period and recent birth. In our continuing modelling efforts to determine the …
Light-curve Evolution due to Secular Dynamics and the Vanishing Transits of KOI 120.01
Aharonson, Oded; Judkovsky, Yair; Ofir, Aviv
Non-Keplerian dynamics of planetary orbits manifest in the transit light curve as variations of different types. In addition to transit timing variations, the shape of the transits contains additional information on variations in the geometry of the orbit. This study presents an analytic approach to light-curve fitting: dynamical variations in the…
Infrared colours and spectral energy distributions of hard X-ray selected obscured and Compton-thick active galactic nuclei
Goto, T.; Güver, T.; Kilerci Eser, Ece +2 more
We investigate the infrared colours and spectral energy distributions (SEDs) of 338 X-ray selected active galactic nuclei (AGNs) from the Swift/Burst Alert Telescope (BAT) 105-month survey catalogue, which have been detected using AKARI, in order to find new selection criteria for Compton-thick AGNs. By combining data from the Galaxy Evolution Exp…
Spectroscopic Orbits of Subsystems in Multiple Stars. VII.
Tokovinin, Andrei
Spectroscopic orbits of main-sequence stars HIP 3150A, 6873B, 11537A, 22531A, 22534B, 31089B, 49336A, 104833C, and 107731A belonging to eight multiple systems are determined from high-resolution spectra taken with CHIRON. Two of those are twins with mass ratios above 0.95. HIP 11537 is a young three-tier quadruple system with inner periods of 22.3…
Gamma-Ray Emission Revealed at the Western Edge of SNR G344.7-0.1
Ajello, M.; Marchesi, S.; Eagle, J. +2 more
We report on the investigation of a very high energy (VHE), Galactic γ-ray source recently discovered at >50 GeV using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (Fermi). This object, 2FHL J1703.4-4145, displays a very hard >50 GeV spectrum with a photon index Γγ ∼ 1.2 in the 2FHL catalog and, as s…
First Embedded Cluster Formation in California Molecular Cloud
Xu, Jin-Long; Zhu, Ming; Xu, Ye +5 more
We performed a multi-wavelength observation toward the LkHα 101 embedded cluster and its adjacent 85'×60' region. The LkHα 101 embedded cluster is the first and only significant cluster in the California molecular cloud (CMC). These observations have revealed that the LkHα 101 embedded cluster is located just at the projected intersectional region…