Table · dataset · 2024
Interstellar Polarization Survey. III.
Listed in IVOA Registry (Virtual Observatory)
Optical starlight can be partially polarized while propagating through the dusty, magnetized interstellar medium (ISM).
Description
The polarization efficiency describes the polarization intensity fraction per reddening unit, PV/E(B-V), related to the interstellar dust grains and magnetic field properties. The maximum value observed, [PV/E(B-V)]max, is thus achieved under optimal polarizing conditions of the ISM.
Therefore, the analysis of polarization efficiency observations across the Galaxy contributes to the study of magnetic field topology, small-scale magnetic fluctuations, grain-alignment efficiency, and composition. Infrared observations from Planck satellite have set [PV/E(B-V)]max to 13%/mag. However, recent optical polarization observations in Planck's highly polarized regions showed polarization efficiency values between 13.6%/mag and 18.2%/mag (depending on the extinction map used), indicating that [PV/E(B-V)]max is not well constrained yet.
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We used V-band polarimetry of the Interstellar Polarization Survey (consisting of ~10500 high-quality observations distributed in 34 fields of 0.3degx0.3deg) to accurately estimate the polarization efficiency in the ISM. We estimated the upper limit of PV/E(B-V) with the weighted 99th percentile of the field. In five regions, the polarization efficiency upper limit is above 13% mag-1.
Furthermore, we found [PV/E(B-V)]max=15.8_-0.9_^+1.3^%/mag using diffuse intermediate-latitude (|b|>7.5deg) regions with apparently strong regular Galactic magnetic field in the plane-of-sky. We studied the variations of PV/E(B-V) across the sky and tested toy models of polarization efficiency with Galactic longitude that showed some correspondence with a uniform spiral magnetic field.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/34 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023AJ....166...34A ui.adsabs.harvard.edu/abs/2023AJ....166...34A ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/aj/166/34 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 69%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/aj/166/34 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |