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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…
Evolution from Spherical AGB Wind to Multipolar Outflow in Pre-planetary Nebula IRAS 17150-3224
Lee, Chin-Fei; Sahai, Raghvendra; Huang, Po-Sheng
We have mapped the pre-planetary nebula IRAS 17150-3224 in the 350 GHz continuum and CO J = 3-2 line at an angular resolution of ∼0"09 using the Atacama Large Millimeter/submillimeter Array. A continuum source is detected at the center of the nebula, elongated along the equatorial plane, likely tracing a dusty torus around the central source. Cont…
Global parameters of the W UMa binaries NSVS 3777464, NSVS 5810460 and ASAS J212236+0657.3
Petrov, N.; Kjurkchieva, D.; Popov, V. +1 more
Photometric observations in Sloan filters g', i' of the short-period eclipsing stars NSVS 3777464, NSVS 5810460 and ASAS J212236+0657.3 are presented. Their goal was determination of the targets' parameters by light curve solutions. We found the three targets to be overcontact binaries of W subtype: NSVS 3777464 and NSVS 5810460 undergo partial ec…
The highly inflated giant planet WASP-174b
Henning, Th.; Southworth, J.; Chen, G. +18 more
Context. The transiting exoplanetary system WASP-174 was reported to be composed by a main-sequence F star (V = 11.8 mag) and a giant planet, WASP-174b (orbital period Porb = 4.23 days). However only an upper limit was placed on the planet mass (<1.3 MJup), and a highly uncertain planetary radius (0.7-1.7 RJup) …
X-Ray Hotspots in the Northwest Shell of the Supernova Remnant RX J1713.7-3946
Uchiyama, Yasunobu; Tsuji, Naomi; Higurashi, Ryota
The supernova remnant (SNR) RX J1713.7-3946 is one of the best-studied accelerators of cosmic rays because of its strong nonthermal X-ray and gamma-ray radiation. We have analyzed accumulated Chandra observations with a total exposure time of ∼266 ks in the northwest rim of RX J1713.7-3946. We detect a substantially large number of point-like sour…