15 citations · 26 across the 4 of their papers we have counts for
4 papers
The 17 GHz active region number
C. L. Selhorst, J. E. R. Costa, C. G. Giménez de Castro +3
We report the statistics of the number of active regions (NAR) observed at 17 GHz with the Nobeyama Radioheliograph between 1992, near the maximum of cycle 22, and 2013, that also…
CYCLOPS-X: Simultaneous optical and X-ray modeling of polars
K. M. G. Silva, C. V. Rodrigues, J. E. R. Costa
From the optical to the X-ray frequencies, most of the continuum emission from AM Her systems originates in the post-shock region. Hence, using multi-spectral data can be useful to…
Cyclotron Modeling of the Polar CP Tuc
C. V. Rodrigues, J. E. R. Costa, K. M. G. Silva +3
CP Tuc (AX J2315-592) is a polar for which two accretion geometries have been put forward. They differ in the location of the accretion column on the white-dwarf surface. In this s…
The Solar Radius in the EUV during the Cycle XXIII
C. G. Giménez de Castro, A. C. V. Saraiva, J. E. R. Costa +1
Aims. To determine the solar transition region and coronal radius at EUV wavelengths and its time evolution during Solar Cycle XXIII. Methods. We use daily 30.4 and 17.1 nm images…