Optical linear polarization of the Be--X-ray pulsar binary LS V +44 17

@misc{nitindala2026optical,
  title = {{Optical linear polarization of the Be--X-ray pulsar binary LS V +44 17}},
  author = {Anagha P. Nitindala and Andrei V. Berdyugin and Alexandra Veledina and Sergey S. Tsygankov and Vadim Kravtsov and Maria Alejandra Diaz Teodori and Vilppu Piirola and Takeshi Sakanoi and Masato Kagitani and Svetlana V. Berdyugina and Juri Poutanen},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.06249},
  eprint = {2611.06249},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.06249},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Optical linear polarization of the Be--X-ray pulsar binary LS V +44 17
AU  - Anagha P. Nitindala
AU  - Andrei V. Berdyugin
AU  - Alexandra Veledina
AU  - Sergey S. Tsygankov
AU  - Vadim Kravtsov
AU  - Maria Alejandra Diaz Teodori
AU  - Vilppu Piirola
AU  - Takeshi Sakanoi
AU  - Masato Kagitani
AU  - Svetlana V. Berdyugina
AU  - Juri Poutanen
PY  - 2026
DA  - 2026/11/04
PB  - arXiv
DO  - 10.48550/arxiv.2611.06249
UR  - https://arxiv.org/abs/2611.06249
AB  - We present the optical BVR polarization measurements for the Be--X-ray pulsar binary LS V +44 17 from its giant outburst in early 2023 and subsequently over three years. We detect a significant polarization of about ≈1.1--2.1%, which includes the interstellar contribution. Polarization evolves significantly with time since the outburst. The interstellar polarization was found to be ≈2.5--2.9%. The obtained intrinsic optical polarization of LS V +44 17 after correction is between $0.5−−1.7\%$, perpendicular to the interstellar polarization direction. We consider various plausible sources of optical polarization and infer scattering in the Be decretion disk to be the most dominant source based on time and spectral evolution. Changing intrinsic PA with time hints at a plausible precession of the Be disk.
ER  -