Search Publications
Missions
Journals
Publication Years
Orbit, Dynamical Mass, and MK Type of Visual Binary WOR 2
Docobo, J. A.; Balega, Y. Y.; Tamazian, V. S. +2 more
On the basis of new speckle measurements with the 6 m telescope of the Special Astrophysical Observatory (Russia) and Hipparcos astrometry, an improved orbital solution with a period of P=24.1 yr for the visual binary WOR 2 is obtained. The dynamical mass of the system is 1.40+/-0.25 Msolar. Differential photometry (Δm=0.55 mag) allowed…
The peculiar galaxy Mkn 298 revisited with integral field spectroscopy
Ciroi, S.; Rafanelli, P.; Radovich, M. +3 more
Spectroscopic and imaging data of the peculiar galaxy Mkn 298 are presented. Narrow-band Hα and broad-band R images are used to study the star formation rate in the galaxy and its morphology, which is typical of a merging system. Long-slit and integral field spectra are used to assess the kinematics of gas and stars, and the nature of the ionizing…
Accretion in Strong Gravity: from Galactic to Supermassive Black Holes
Done, Chris; Gierliński, Marek
The galactic black hole binary systems give an observational template showing how the accretion flow changes as a function of increasing mass accretion rate, or L/LEdd. These data can be synthesised with theoretical models of the accretion flow to give a coherent picture of accretion in strong gravity, in which the major hard-soft spect…
An investigation of Titan's aerosols using microwave analog measurements and radiative transfer modeling
Kolokolova, L.; Gustafson, B. Å. S.; Thomas-Osip, J. E. +1 more
A combination of laboratory experiments, theoretical modeling, and spacecraft observations is employed to characterize the aerosols in the atmosphere of Titan. The scattering properties of model aerosols were measured using the Microwave Analog Light Scattering Facility at the University of Florida and complemented with theoretical modeling of sin…
Fine-time energetic electron behavior observed by Cluster/RAPID in the magnetotail associated with X-line formation and subsequent current disruption
Zong, Q. -G.; Daly, P. W.; Baker, D. N. +3 more
Energetic electrons with 90deg pitch angle have been observed in the magnetotail at ~19 RE near local midnight during the recovery phase of a substorm event on 27 August 2001 (Baker et al., 2002). Based on auroral images Baker et al. (2002) placed the substorm expansion phase between ~04:06:16 and ~04:08:19 UT. The electron enhancements…
Waiting Time Distribution of Coronal Mass Ejections
Ding, Ming-De; Chen, Peng-Fei; Yeh, Chin-Teh
Inspired by the finding that the large waiting time of solar flares presents a power-law distribution, we investigate the waiting time distribution (WTD) of coronal mass ejections (CMEs). SOHO/LASCO CME observations from 1996 to 2003 are used in this study. It is shown that the observed CMEs have a similar power-law behavior to the flares, with an…
The NUADU experiment on TC-2 and the first Energetic Neutral Atom (ENA) images recorded by this instrument
Barabash, S.; Gunell, H.; Brinkfeldt, K. +13 more
The spacecraft potential of Double Star TC-1 is positive in large parts of the orbits due to the photo-effect from solar EUV irradiation. These positive potentials typically disturb low energy plasma measurements on board. The potential can be reduced, and thereby the particle measurements improved, by emitting a positive ion beam. This method has…
A far-infrared view of the Lockman hole from ISO 95-µm observations - II. Optical identifications and insights into the nature of the far-infrared sources
Rodighiero, G.; Franceschini, A.; Lari, C. +1 more
We present the optical identifications of a 95-µm ISOPHOT sample in the Lockman hole over an area of approximately half a deg2. The Rodighiero et al. catalogue includes 36 sources, making up a complete flux-limited sample for S95µm>= 100 mJy. Reliable sources were detected, with decreasing but well-controlled c…
GRBs Optical follow-up observation at Lulin observatory, Taiwan
Ip, W. H.; Tamagawa, T.; Makishima, K. +3 more
The Lulin GRB program, using the Lulin One-meter Telescope (LOT) in Taiwan started in July 2003. Its scientific aims are to discover optical counterparts of XRFs and short and long GRBs, then to quickly observe them in multiple bands. Thirteen follow-up observations were provided by LOT between July 2003 and Feb. 2005. One host galaxy was found at…
Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG 0214-057
Akiyama, M.; Watson, M. G.; Roberts, T. P. +1 more
We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy