Search Publications
Probing the fast outflow in IRAS 15452 - 5459 with ATCA observations of OH, H2O and SiO masers
Menten, K. M.; Cerrigone, L.; Wiesemeyer, H.
Maser lines of OH, H2O and SiO are commonly observed in O-rich asymptotic giant branch (AGB) stars, but their presence after the end of the AGB phase is linked to non-spherical mass-loss processes. IRAS 15452 - 5459 is a post-AGB star with an hourglass nebula whose maser lines are quite peculiar. We observed all of the three maser speci…
The low-mass companion of HIP 45314 (HR 3672)
Neuhäuser, R.; Schmidt, T. O. B.; Mugrauer, M. +2 more
We report the discovery of a very low mass companion to HIP 45314 (HR 3672) located about 2.7 arcsec north-west of HR 3672 A. With four years of epoch difference between the two observations obtained with the Very Large Telescope we can reject by more than 4σ that B would be a non-moving background object unrelated to A. HR 3672 A is a B 7-8 main-…
Light curves of six bright soft X-ray transients in M31
Nooraee, Nakisa
Disc irradiation is thought to be capable of explaining the global behaviour of the light curves of soft X-ray transients (SXTs). Depending on the strength of the central X-ray emission in irradiating the disc, the light curve may exhibit an exponential or a linear decay. The model predicts that in brighter transients a transition from exponential…
A multi-wavelength study of nuclear activity and environment of low-power radio galaxy CTD 86
Singh, K. P.; Dewangan, G. C.; Pandge, M. B. +1 more
We present an X-ray study of the nuclear and extended emission of a nearby Fanaroff & Riley class I (FR-I) radio galaxy CTD 86 based on the XMM-Newton observations. Two different components observed are: diffuse thermal emission from hot gas (kT ∼ 0.79 keV, ne ∼ 10-3 cm-3, LX ∼ 5 × 1042 er…
Sunyaev-Zel'dovich effect or not ? detecting the main foreground effect of most galaxy clusters.
Zhang, B.; Wu, Y.; Xiao, W. +2 more
Galaxy clusters are the most massive objects in the Universe and comprise a high-temperature intracluster medium of about 107 K, believed to offer a main foreground effect for cosmic microwave background (CMB) data in the form of the thermal Sunyaev-Zel'dovich (SZ) effect. This assumption has been confirmed by SZ signal detection in hun…