11 citations · 30 across the 4 of their papers we have counts for
5 papers · 1 filter
Hαspectropolarimetry of RY Tau and PX Vul
A. Pereyra, A. M. Magalhães, F. X. de Araújo
Aims: To detect line effects using spectropolarimetry in order to find evidence of rotating disks and their respective symmetry axes in T Tauri stars. Methods: We used the IAGPOL i…
The Magnetic Field Structure of the LMC 2 Supershell: NGC 2100
John P. Wisniewski, Karen S. Bjorkman, Antonio M. Magalhaes +2
We present U,B,V,R,I imaging polarimetry of NGC 2100 and its surrounding environment, which comprise a part of the LMC 2 supershell. The morphology of the observed position angle d…
Optical polarimetric monitoring of the type II-plateau SN 2005af
A. Pereyra, A. M. Magalhaes, C. V. Rodrigues +4
Aims. Core-collapse supernovae may show significant polarization that implies non-spherically symmetric explosions. We observed the type II-plateau SN 2005af using optical polarime…
Polarimetry and the Envelopes of Magellanic B[e] Supergiants
A. M. Magalhaes, R. Melgarejo, A. Pereyra +1
We discuss the nature of the circumstellar envelopes around the B[e] supergiants (B[e]SG) in the Magellanic Clouds (MC). Contrary to those in the Galaxy, the MC B[e]SG have a well…
Polarimetry of Li-rich giants
A. Pereyra, B. V. Castilho, A. M. Magalhaes
Protoplanetary nebulae typically present non-spherical envelopes. The origin of such geometry is still controversial. There are indications that it may be carried over from an earl…