190 citations · 490 across the 23 of their papers we have counts for
10 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…
Modeling the Structure of Hot Star Disks: a Critical Evaluation of the Viscous Decretion Scenario
A. C. Carciofi, J. E. Bjorkman, A. S. Miroshnichenko +2
We present self-consistent solutions for the disk structure of classical Be stars. Our disk model is hydrostatically supported in the vertical direction and the radial structure is…
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…
Polarization of Herbig Ae/Be candidates and their environment
Claudia V. Rodrigues, Marilia J. Sartori, Jane Gregorio-Hetem +2
We present the V band polarization of 81 Herbig Ae/Be (HAeBe) candidates from the Pico dos Dias Survey (PDS). A good estimate of the foreground polarization was possible for most s…
An AGN Identification for 3EG J2006-2321
P. M. Wallace, J. P. Halpern, A. M. Magalhaes +1
We present a multiwavelength analysis of the high-energy gamma-ray source 3EG J2006-2321. The flux of this source above 100 MeV is shown to be variable on time scales of days and m…
S 111 and the polarization of the B[e] supergiants in the Magellanic Clouds
R. Melgarejo, A. M. Magalhaes, A. C. Carciofi +1
We have obtained linear polarization measurements of the Large Magellanic Cloud B[e] supergiant S 111 using optical imaging polarimetry. The intrinsic polarization found is consist…
Polarimetric Evidence of Non-Spherical Winds
Antonio Mario Magalhaes, Claudia V. Rodrigues
Polarization observations yield otherwise unobtainable information about the geometrical structure of unresolved objects. In this talk we review the evidences for non-spherically s…
Dust in the Small Magellanic Cloud: Interstellar Polarization and Extinction
C. V. Rodrigues, A. M. Magalhaes, G. V. Coyne S. J. +1
To elucidate the dust properties in the SMC we have for the first time measured linear polarization in five colors in the optical region of the spectrum for a sample of reddened st…