INTERSTELLAR POLARISATION TOWARDS A REGION AROUND B5
Section: STARS AND THE INTERSTELLAR MEDIUM
Authors:
1.
Saint-Petersburg University
Peter the Great St. Petersburg Polytechnic University
Peter the Great St. Petersburg Polytechnic University
2.
Saint-Petersburg University
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo
Type:
Сonference article
Published:
27.12.2024
Subject area:
UDK 52 Астрономия. Геодезия
UDK 53 Физика
UDK 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
UDK 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
UDK 523 Солнечная система
UDK 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
UDK 52-1 Метод изучения
UDK 52-6 Излучение и связанные с ним процессы
GRNTI 41.00 АСТРОНОМИЯ
GRNTI 29.35 Радиофизика. Физические основы электроники
GRNTI 29.31 Оптика
GRNTI 29.33 Лазерная физика
GRNTI 29.27 Физика плазмы
GRNTI 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
OKSO 03.06.01 Физика и астрономия
OKSO 03.05.01 Астрономия
OKSO 03.04.03 Радиофизика
BBK 2 ЕСТЕСТВЕННЫЕ НАУКИ
BBK 223 Физика
TBK 614 Астрономия
TBK 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
UDK 53 Физика
UDK 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
UDK 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
UDK 523 Солнечная система
UDK 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
UDK 52-1 Метод изучения
UDK 52-6 Излучение и связанные с ним процессы
GRNTI 41.00 АСТРОНОМИЯ
GRNTI 29.35 Радиофизика. Физические основы электроники
GRNTI 29.31 Оптика
GRNTI 29.33 Лазерная физика
GRNTI 29.27 Физика плазмы
GRNTI 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
OKSO 03.06.01 Физика и астрономия
OKSO 03.05.01 Астрономия
OKSO 03.04.03 Радиофизика
BBK 2 ЕСТЕСТВЕННЫЕ НАУКИ
BBK 223 Физика
TBK 614 Астрономия
TBK 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
Language:
English
Keywords:
interstellar dust; polarisation; magnetic fields
Abstract (English):
Interstellar polarization was known to give information on the direction of galactic magnetic fields. Nowadays, the Gaia parallaxes and various photometric surveys allow the wavelength dependence of this polarization to provide even more information about the magnetic fields and dust grains. We consider the region of the interstellar medium towards the Bok globule Bernard 5 (B5, $l \approx 161^{\circ}$, $b \approx 17^{\circ}$). We performed a spectroscopic study of stars in this region at 0.7-m telescope of the Abastumani observatory. We carried out $UBVRI$ polarimetric observations of some of our stars at 1.25-m and 2.6-m CrAO telescopes and determined the parameters of the dependence of polarization on wavelength. Using stellar photometry and parallaxes available from recent sky surveys, we have estimated the visual extinction towards the observed stars. By analyzing the relationship between the parameters of the interstellar polarization and extinction for stars located at different distances and at different angular distances from the B5 globule, the structure and properties of the interstellar medium in the region under consideration are discussed.
Interstellar polarization was known to give information on the direction of galactic magnetic fields. Nowadays, the Gaia parallaxes and various photometric surveys allow the wavelength dependence of this polarization to provide even more information about the magnetic fields and dust grains. We consider the region of the interstellar medium towards the Bok globule Bernard 5 (B5, $l \approx 161^{\circ}$, $b \approx 17^{\circ}$). We performed a spectroscopic study of stars in this region at 0.7-m telescope of the Abastumani observatory. We carried out $UBVRI$ polarimetric observations of some of our stars at 1.25-m and 2.6-m CrAO telescopes and determined the parameters of the dependence of polarization on wavelength. Using stellar photometry and parallaxes available from recent sky surveys, we have estimated the visual extinction towards the observed stars. By analyzing the relationship between the parameters of the interstellar polarization and extinction for stars located at different distances and at different angular distances from the B5 globule, the structure and properties of the interstellar medium in the region under consideration are discussed.
Keywords:
interstellar dust; polarisation; magnetic fields
interstellar dust; polarisation; magnetic fields
1. Anders F., Khalatyan A., Queiroz A.B., et al., 2022, Astronomy \& Astrophysics, 658, id. A91
2. Krayani H. and Il'in V.B., 2024, in preparation
3. Voshchinnikov N.V., Il’in V.B., Das H.K., 2016, Monthly Notices of the Royal Astronomical Society, 462, 3, p. 2343
