42 citations
7 papers
Expansion Formula For the Magnetic Field of a Periodically Deformed Circular Current Loop
Robert Salazar, Gabriel Téllez, Camilo Bayona-Roa
A method is derived to obtain an expansion formula for the magnetic field generated by a closed planar wire carrying a steady electric current. The…
Electric Vector Potential Approach in Electrostatics: The Surface Electrode
Robert Salazar, Camilo Bayona-Roa, Gabriel Téllez
Electric vector potential is a legitimate but rarely used tool to calculate the steady electric field in free-charge regions. Commonly, it is preferred to emplo…
No Excess of RR Lyrae Stars in the Canis Major Overdensity
Cecilia Mateu, A. Katherina Vivas, Robert Zinn +2
Our multi-epoch survey of ~20 sq. deg. of the Canis Major overdensity has detected only 10 RR Lyrae stars (RRLS). We show that this number is consistent with the number expected fr…
Sub-Structures in the Halo of the Milky Way
A. Katherina Vivas, R. Zinn, Y. Subero +1
The latest results of the QUEST survey for RR Lyrae stars are described. This survey, which is designed to find and characterize sub-structures in the halo of our Galaxy, has cover…
VLT Spectroscopy of RR Lyrae Stars in the Sagittarius Tidal Stream
A. Katherina Vivas, Robert Zinn, Carme Gallart
Sixteen RR Lyrae variables from the QUEST survey that lie in the leading arm of the tidal stream from the Sagittarius dSph galaxy have been observed spectroscopically to measure th…
Halo Substructure in the QUEST RR Lyrae Survey
Robert Zinn, A. Katherina Vivas, Carme Gallart +1
A survey of 380 sq. deg. of the sky with the 1m Schmidt telescope at the Observatorio Nacional de Llano del Halo and the QUEST camera has found 498 RR Lyrae variables lying from 4…