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
Pages:
from 367
to 370
Published:
27.12.2024
Subject area:
UDC 52
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
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
