Optical polarimetric observations of the microquasar LS 5039
We present the first optical polarimetric observations of the runaway microquasar LS 5039. Our results reveal the presence of a large amount (∼5%) of polarized emission towards this binary system. By combining polarimetric and spectroscopic observations of some stars in the field together with avail...
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todo:paper_00046361_v427_n3_p959_Combi2023-10-03T14:00:10Z Optical polarimetric observations of the microquasar LS 5039 Combi, J.A. Cellone, S.A. Martí, J. Ribó, M. Mirabel, I.F. Casares, J. Binaries Binaries - Stars General - Polarization Individual LS 5039 - X-rays Stars Computational geometry Electronic density of states Electrons Interpolation Magnetic fields Polarization Spectroscopic analysis Statistical methods Vectors Velocity Binaries-stars General-polarization LS 5039-X-rays Stars Polarimeters We present the first optical polarimetric observations of the runaway microquasar LS 5039. Our results reveal the presence of a large amount (∼5%) of polarized emission towards this binary system. By combining polarimetric and spectroscopic observations of some stars in the field together with available statistical information on the galactic interstellar polarization of the region, we have estimated and subtracted the contribution of the interstellar polarization in this direction. As a result, we obtain an intrinsic polarization of ∼3% for the object, much higher than what would be expected from jet emission in the optical domain. We suggest that the polarized light originates by electron Thomson scattering in the stellar envelope of the companion star. This allows us to constrain the size of the region where the polarized emission originates, as well as estimating the scattering electronic density and the wind velocity at such distance. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v427_n3_p959_Combi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Binaries Binaries - Stars General - Polarization Individual LS 5039 - X-rays Stars Computational geometry Electronic density of states Electrons Interpolation Magnetic fields Polarization Spectroscopic analysis Statistical methods Vectors Velocity Binaries-stars General-polarization LS 5039-X-rays Stars Polarimeters |
| spellingShingle |
Binaries Binaries - Stars General - Polarization Individual LS 5039 - X-rays Stars Computational geometry Electronic density of states Electrons Interpolation Magnetic fields Polarization Spectroscopic analysis Statistical methods Vectors Velocity Binaries-stars General-polarization LS 5039-X-rays Stars Polarimeters Combi, J.A. Cellone, S.A. Martí, J. Ribó, M. Mirabel, I.F. Casares, J. Optical polarimetric observations of the microquasar LS 5039 |
| topic_facet |
Binaries Binaries - Stars General - Polarization Individual LS 5039 - X-rays Stars Computational geometry Electronic density of states Electrons Interpolation Magnetic fields Polarization Spectroscopic analysis Statistical methods Vectors Velocity Binaries-stars General-polarization LS 5039-X-rays Stars Polarimeters |
| description |
We present the first optical polarimetric observations of the runaway microquasar LS 5039. Our results reveal the presence of a large amount (∼5%) of polarized emission towards this binary system. By combining polarimetric and spectroscopic observations of some stars in the field together with available statistical information on the galactic interstellar polarization of the region, we have estimated and subtracted the contribution of the interstellar polarization in this direction. As a result, we obtain an intrinsic polarization of ∼3% for the object, much higher than what would be expected from jet emission in the optical domain. We suggest that the polarized light originates by electron Thomson scattering in the stellar envelope of the companion star. This allows us to constrain the size of the region where the polarized emission originates, as well as estimating the scattering electronic density and the wind velocity at such distance. |
| format |
JOUR |
| author |
Combi, J.A. Cellone, S.A. Martí, J. Ribó, M. Mirabel, I.F. Casares, J. |
| author_facet |
Combi, J.A. Cellone, S.A. Martí, J. Ribó, M. Mirabel, I.F. Casares, J. |
| author_sort |
Combi, J.A. |
| title |
Optical polarimetric observations of the microquasar LS 5039 |
| title_short |
Optical polarimetric observations of the microquasar LS 5039 |
| title_full |
Optical polarimetric observations of the microquasar LS 5039 |
| title_fullStr |
Optical polarimetric observations of the microquasar LS 5039 |
| title_full_unstemmed |
Optical polarimetric observations of the microquasar LS 5039 |
| title_sort |
optical polarimetric observations of the microquasar ls 5039 |
| url |
http://hdl.handle.net/20.500.12110/paper_00046361_v427_n3_p959_Combi |
| work_keys_str_mv |
AT combija opticalpolarimetricobservationsofthemicroquasarls5039 AT cellonesa opticalpolarimetricobservationsofthemicroquasarls5039 AT martij opticalpolarimetricobservationsofthemicroquasarls5039 AT ribom opticalpolarimetricobservationsofthemicroquasarls5039 AT mirabelif opticalpolarimetricobservationsofthemicroquasarls5039 AT casaresj opticalpolarimetricobservationsofthemicroquasarls5039 |
| _version_ |
1807320373686960128 |