Search Publications
Exploring the Bridge between A3556 and A3558 in the Shapley Supercluster
Kelley, R. L.; Gupta, A.; Mitsuishi, I. +4 more
Looking at the region connecting two clusters is a promising way to identify and study the Warm-Hot Intergalactic Medium. Observations show that the spectrum of the bridge between A3556 and A3558 has a stronger soft X-ray emission than the nearby region. Suzaku observations could not discriminate the origin of the extra emission. In this work we a…
Correcting peak deformation in Rosetta's ROSINA/DFMS mass spectrometer
Gunell, H.; Altwegg, K.; Balsiger, H. +17 more
A comprehensive HST BVI catalogue of star clusters in five Hickson compact groups of galaxies
Bastian, N.; Konstantopoulos, I. S.; Gallagher, S. C. +5 more
We present a photometric catalogue of star cluster candidates in Hickson compact groups (HCGs) 7, 31, 42, 59, and 92, based on observations with the Advanced Camera for Surveys and the Wide Field Camera 3 on the Hubble Space Telescope. The catalogue contains precise cluster positions (right ascension and declination), magnitudes, and colours in th…
Filaments disappearance in relation to coronal mass ejections during the solar cycle 23
Mawad, R.; Shaltout, Mosalam; Yousef, M. +2 more
We have studied the relationship between filament disappearances with CMEs during solar period 1996-2010. We used the observed disappearing filaments in Hα data from Meudon given in NOAA, and coronal mass ejections data (CMEs) from SOHO/LASCO. We obtained 278 CME events (14%) contemporary filament disappearances and CME ejections (from a total of …
Multiwavelength modeling the SED of supersoft X-ray sources III. RS Ophiuchi: The supersoft X-ray phase and beyond
Skopal, A.
I modeled the 14 Å-37 µm SED of the recurrent symbiotic nova RS Oph during its supersoft source (SSS) phase and the following quiescent phase. During the SSS phase, the model SEDs revealed the presence of a strong stellar and nebular component of radiation in the spectrum. The former was emitted by the burning WD at highly super-Eddington ra…
Coupling of the magnetic field and gas flows inferred from the net circular polarization in a sunspot penumbra
Ichimoto, Kiyoshi; Shaltout, Abdelrazek M. K.
We analyze penumbral fine structure using high-resolution spectropolarimetric data obtained by the Solar Optical Telescope on board the Hinode satellite. The spatial correlation between the net circular polarization (NCP) and Evershed flow is investigated in detail. Here we obtain that negative NCP structures are correlated with the Evershed flow …
The Molecular H2 Emission and the Stellar Kinematics in the Nuclear Region of the Sombrero Galaxy
Steiner, J. E.; Menezes, R. B.
We analyze the molecular H2 emission and the stellar kinematics in a data cube of the nuclear region of M104, the Sombrero galaxy, obtained with NIFS on the Gemini-north telescope. After a careful subtraction of the stellar continuum, the only emission line we detected in the data cube was {{{H}}}2λ 21218. An analysis of this…
WISE J061213.85-303612.5: a new T-dwarf binary candidate
Minniti, D.; Huélamo, N.; Mawet, D. +8 more
Context. T and Y dwarfs are among the coolest and least luminous objects detected, and they can help to understand the properties of giant planets. Up to now, there are more than 350 T dwarfs that have been identified thanks to large imaging surveys in the infrared, and their multiplicity properties can shed light on the formation process.
Ai…
Weak lensing by minifilament or minivoid as the origin of flux-ratio anomalies in lensed quasar MG0414+0534
Inoue, Kaiki Taro
We explore the weak lensing effects by ministructures in the line of sight in a quadruply lensed quasar MG0414+0534 that shows an anomaly in the flux ratios. We find that the observed flux-ratio anomaly can be explained by a presence of either a minifilament or a minivoid in the line of sight with a surface mass density of the order of 108-9<…
Observational evidence for travelling wave modes bearing distance proportional shifts
Guruprasad, V.
Discrepancies of range between the Space Surveillance Network radars and the Deep Space Network in tracking the 1998 Earth flyby of NEAR, and between ESA's Doppler and range data in Rosetta's 2009 flyby, reveal a consistent excess delay, or lag, equal to instantaneous one-way travel time in the telemetry signals. These lags readily explain all det…