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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28746
Title: The polarization mode of the auroral radio emission from the early-type star HD 142301
Authors: LETO, PAOLO 
TRIGILIO, CORRADO 
Oskinova, L. M.
Ignace, R.
BUEMI, CARLA SIMONA 
UMANA, Grazia Maria Gloria 
Cavallaro, Francesco 
INGALLINERA, Adriano 
BUFANO, FILOMENA 
Phillips, N. M.
Agliozzo, C.
Cerrigone, L.
Todt, H.
RIGGI, Simone 
LEONE, FRANCESCO 
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 482
Issue: 1
First Page: L4
Abstract: We report the detection of the auroral radio emission from the early-type magnetic star HD 142301. New VLA observations of HD 142301 detected highly polarized amplified emission occurring at fixed stellar orientations. The coherent emission mechanism responsible for the stellar auroral radio emission amplifies the radiation within a narrow beam, making the star where this phenomenon occurs similar to a radio lighthouse. The elementary emission process responsible for the auroral radiation mainly amplifies one of the two magneto-ionic modes of the electromagnetic wave. This explains why the auroral pulses are highly circularly polarized. The auroral radio emission of HD 142301 is characterized by a reversal of the sense of polarization as the star rotates. The effective magnetic field curve of HD 142301 is also available making it possible to correlate the transition from the left to the right-hand circular polarization sense (and vice versa) of the auroral pulses with the known orientation of the stellar magnetic field. The results presented in this letter have implications for the estimation of the dominant magneto-ionic mode amplified within the HD 142301 magnetosphere.
URI: http://hdl.handle.net/20.500.12386/28746
URL: https://doi.org/10.1093/mnrasl/sly179
https://arxiv.org/pdf/1809.07504.pdf
https://academic.oup.com/mnrasl/article/482/1/L4/5106357
ISSN: 0035-8711
DOI: 10.1093/mnrasl/sly179
Bibcode ADS: 2019MNRAS.482L...4L
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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