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19 papers · 2 filters
Comparison of the H-alpha circumstellar disks in Be/X-ray binaries and Be stars
R. K. Zamanov, P. Reig, J. Marti +4
We present a comparative study of the circumstellar disks in Be/X-ray binaries and isolated Be stars based upon the H-alpha emission line. From this comparison it follows that the…
Towards a model of Quintessential Inflation
K. Dimopoulos
A model of quintessential inflation is presented, which manages to achieve the requirements of both inflation and quintessence with natural values of the mass-scales and parameters…
The Be/X-ray binary LS 992/RX J0812.4-3114: physical parameters and long-term variability
P. Reig, I. Negueruela, D. A. H. Buckley +3
We present the first long-term optical and infrared study of the optical counterpart to the source RX J0812.4-3114, an X-ray pulsar with a Be type companion. During the period cove…
Physical parameters in relativistic jets from Compact Symmetric Objects
Manuel Perucho, Jose Ma. Marti
Compact symmetric objects conform a class of sources characterized by high luminosity radio emission located symmetrically on both sides of the active galactic nucleus on linear sc…
VLBI imaging of the gravitational lenses B1422+231 and MGJ0414+0534
E. Ros, J. C. Guirado, J. M. Marcaide +5
We present wide-field images of the quadruple gravitational lenses B1422+231 and MGJ0414+0534 obtained from global Very Long Baseline Interferometry (VLBI) observations at 8.4 GHz…
On the way to global phase-delay astrometry
E. Ros, J. M. Marcaide, J. C. Guirado +1
The use of the phase-delay improves substantially the accuracy obtained in VLBI astrometry with respect to the group-delay observable. Recently, Ros et al. (1999) have extended the…