{"title":"Interstellar Polarisation Towards a Region Around the Bok Globule B5","authors":"H. A. Krayani, V. B. Il’in","doi":"10.1007/s10511-025-09868-z","DOIUrl":null,"url":null,"abstract":"<p>We report the results of our spectroscopic and polarimetric observations of 2° × 2° field around the globule Barnard 5 (B5) belonging to the Perseus cloud complex at the distance d ≈ 300 pc. Using these data, two-dimensional spectral classification was made for about 45 stars. Multi-band polarimetry of about 20 of these stars allowed us to find the parameters (P<sub>max</sub>, λ<sub>max</sub>) of interstellar polarization. Using the Gaia parallaxes and data from the recent photometric surveys, we estimate the interstellar extinction A<sub>V</sub> towards the stars. Our analysis of à variations of the parameters A<sub>V</sub>, P<sub>max</sub>, λ<sub>max</sub> in the sky plane and with the distance allows us to conclude that in the considered field (excluding the halo of B5) the main contribution to the extinction and polarization is provided by an extension of the Taurus cloud complex (TMC) at d ≈ 150 pc, and that the derived values of the parameters indicate that the angle between the line of sight and the magnetic field direction in this part of TMC significantly differs from 90°.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"177 - 194"},"PeriodicalIF":0.7000,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10511-025-09868-z","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
We report the results of our spectroscopic and polarimetric observations of 2° × 2° field around the globule Barnard 5 (B5) belonging to the Perseus cloud complex at the distance d ≈ 300 pc. Using these data, two-dimensional spectral classification was made for about 45 stars. Multi-band polarimetry of about 20 of these stars allowed us to find the parameters (Pmax, λmax) of interstellar polarization. Using the Gaia parallaxes and data from the recent photometric surveys, we estimate the interstellar extinction AV towards the stars. Our analysis of à variations of the parameters AV, Pmax, λmax in the sky plane and with the distance allows us to conclude that in the considered field (excluding the halo of B5) the main contribution to the extinction and polarization is provided by an extension of the Taurus cloud complex (TMC) at d ≈ 150 pc, and that the derived values of the parameters indicate that the angle between the line of sight and the magnetic field direction in this part of TMC significantly differs from 90°.
期刊介绍：
Astrophysics (Ap) is a peer-reviewed scientific journal which publishes research in theoretical and observational astrophysics. Founded by V.A.Ambartsumian in 1965 Astrophysics is one of the international astronomy journals. The journal covers space astrophysics, stellar and galactic evolution, solar physics, stellar and planetary atmospheres, interstellar matter. Additional subjects include chemical composition and internal structure of stars, quasars and pulsars, developments in modern cosmology and radiative transfer.
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