Can I read Investigation of stellar loop structures using VLBI on EtoBox?

Investigation of stellar loop structures using VLBI by M Massi; E Franciosini; J.M Paredes; R Estalella is a Physics and Astronomy article available to read on EtoBox.

What is Investigation of stellar loop structures using VLBI about?

In this paper we discuss a set of three consecutive VLBI observations of the binary system UX Arietis. The most interesting result is the variation with time of the source structure. The usual interpretation in terms of gyrosynchrotron emission from relativistic electrons trapped in a magnetic loop and undergoing collisional and radiative losses is not able, alone, to explain the observed variations. By using optical, radio and X-ray information we have produced a model of two giant loops anchored on a rotating star. As the star rotates, the loops change their relative position and orientation with respect to the line of sight, causing the observed variation of the source structure. The qualitative agreement found is consistent with our hypothesis and makes these observations a sort of a pilot experiment for a new way of using VLBI to observe radio-stars. In order to quantitatively test our model of evolving electrons confined in loops anchored on a rotating star, we plan in the near future a set of several phase-reference VLBI observations fully covering the 6.4 day rotational period.

Who reads Investigation of stellar loop structures using VLBI?

Author

M Massi; E Franciosini; J.M Paredes; R Estalella

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1387-6473)

Published

1999

Language

EN

Field

Physics and Astronomy (Physical Sciences)