422 citations · 849 across the 14 of their papers we have counts for
6 papers · 1 filter
On the Determination of the Rotational Oblateness of Achernar
A. C. Carciofi, A. Domiciano de Souza, A. M. Magalhaes +2
The recent interferometric study of Achernar, leading to the conclusion that its geometrical oblateness cannot be explained in the Roche approximation, has stirred substantial inte…
Achernar: Rapid Polarization Variability as Evidence of Photospheric and Circumstellar Activity
A. C. Carciofi, A. M. Magalhães, N. V. Leister +2
We present the results of a high accuracy () polarization monitoring of the Be Star Achernar that was carried out between July 7th and November 5th, 2006. Our resu…
The Role of Evolutionary Age and Metallicity in the Formation of Classical Be Circumstellar Disks II. Assessing the Evolutionary Nature of Candidate Disk Systems
John P. Wisniewski, Karen S. Bjorkman, Antonio M. Magalhaes +3
(Abridged version) We present the first detailed imaging polarization observations of six SMC and six LMC clusters, known to have large populations of B-type stars which exhibit ex…
Polarimetry toward the IRAS Vela Shell. II. Extinction and Magnetic Fields
A. Pereyra, A. M. Magalhães
We explore correlations between visual extinction and polarization along the western side of the IRAS Vela Shell using a published polarimetric catalog of several hundreds of objec…
The Polarization Signature of Extrasolar Planets Transiting Cool Dwarfs
A. C. Carciofi, A. M. Magalhaes
We investigate the linear polarization in the light of extrasolar planetary systems that may arise as a result of an occultation of the star by a transiting planet. Such an occulta…
Effects of Grain Size on the Spectral Energy Distribution of Dusty Circumstellar Envelopes
A. C. Carciofi, J. E. Bjorkman, A. M. Magalhaes
We study the effects of dust grain size on the spectral energy distribution (SED) of spherical circumstellar envelopes. Based on the self-similarity relations of dusty SEDs derived…