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The first degree-sc...
The first degree-scale starlight-polarization-based tomography map of the magnetized interstellar medium
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- Pelgrims, V. (author)
- Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Université libre de Bruxelles (ULB)
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- Mandarakas, N. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Skalidis, R. (author)
- California Institute of Technology (Caltech)
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- Tassis, Konstantinos (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Panopoulou, Georgia Virginia, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pavlidou, V. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Blinov, D. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Kiehlmann, S. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Clark, S. E. (author)
- Stanford University
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- Hensley, Brandon S. (author)
- California Institute of Technology (Caltech)
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- Romanopoulos, S. (author)
- Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
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- Basyrov, A. (author)
- Universitetet i Oslo,University of Oslo
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- Eriksen, H. K. (author)
- Universitetet i Oslo,University of Oslo
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- Falalaki, M. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),Panepistimio Kritis,University of Crete
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- Ghosh, T. (author)
- Homi Bhabha National Institute (HBNI),Inter-University Centre for Astronomy and Astrophysics (IUCAA)
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- Gjerløw, E. (author)
- Universitetet i Oslo,University of Oslo
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- Kypriotakis, J. A. (author)
- Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
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- Maharana, S. (author)
- South African Astronomical Observatory
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- Papadaki, A. (author)
- Panepistimio Kritis,University of Crete,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
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- Pearson, T. J. (author)
- California Institute of Technology (Caltech)
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- Potter, S. B. (author)
- University of Johannesburg,South African Astronomical Observatory
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- Ramaprakash, A. N. (author)
- Université libre de Bruxelles (ULB),California Institute of Technology (Caltech),Inter-University Centre for Astronomy and Astrophysics (IUCAA)
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- Readhead, A. C.S. (author)
- California Institute of Technology (Caltech)
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- Wehus, I. K. (author)
- Universitetet i Oslo,University of Oslo
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 684
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https://doi.org/10.1...
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Abstract
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- We present the first degree-scale tomography map of the dusty magnetized interstellar medium (ISM) from stellar polarimetry and distance measurements. We used the RoboPol polarimeter at Skinakas Observatory to conduct a survey of the polarization of starlight in a region of the sky of about four square degrees. We propose a Bayesian method to decompose the stellar-polarization source field along the distance to invert the three-dimensional (3D) volume occupied by the observed stars. We used this method to obtain the first 3D map of the dusty magnetized ISM. Specifically, we produced a tomography map of the orientation of the plane-of-sky component of the magnetic field threading the diffuse, dusty regions responsible for the stellar polarization. For the targeted region centered on Galactic coordinates (l, b) (103.3, 22.3), we identified several ISM clouds. Most of the lines of sight intersect more than one cloud. A very nearby component was detected in the foreground of a dominant component from which most of the polarization signal comes and which we identified as being an intersection of the wall of the Local Bubble and the Cepheus Flare. Farther clouds, with a distance of up to 2 kpc, were similarly detected. Some of them likely correspond to intermediate-velocity clouds seen in H I spectra in this region of the sky. We found that the orientation of the plane-of-sky component of the magnetic field changes along distance for most of the lines of sight. Our study demonstrates that starlight polarization data coupled to distance measures have the power to reveal the great complexity of the dusty magnetized ISM in 3D and, in particular, to provide local measurements of the plane-of-sky component of the magnetic field in dusty regions. This demonstrates that the inversion of large data volumes, as expected from the PASIPHAE survey, will provide the necessary means to move forward in the modeling of the Galactic magnetic field and of the dusty magnetized ISM as a contaminant in observations of the cosmic microwave background polarization.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- ISM: structure
- ISM: magnetic fields
- Dust, extinction
- Polarization
- Methods: statistical
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Pelgrims, V.
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Mandarakas, N.
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Skalidis, R.
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Tassis, Konstant ...
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Panopoulou, Geor ...
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Pavlidou, V.
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show more...
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Blinov, D.
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Kiehlmann, S.
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Clark, S. E.
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Hensley, Brandon ...
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Romanopoulos, S.
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Basyrov, A.
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Eriksen, H. K.
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Falalaki, M.
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Ghosh, T.
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Gjerløw, E.
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Kypriotakis, J. ...
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Maharana, S.
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Papadaki, A.
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Pearson, T. J.
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Potter, S. B.
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Ramaprakash, A. ...
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Readhead, A. C.S ...
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Wehus, I. K.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Astronomy and As ...
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Chalmers University of Technology