J/AJ/166/34ivo://CDS.VizieR/J/AJ/166/34doi:10.26093/cds/vizier.51660034CDSAngarita Y.Versteeg M.J.F.Haverkorn M.Rodrigues C.V.,Magalhaes A.M.Santos-Lima R.Kawabata K.S.2024-11-06T20:18:43Z2024-04-29T07:44:06ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvariable-starsinterstellar-mediumOptical starlight can be partially polarized while propagating through the dusty, magnetized interstellar medium (ISM). 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. 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.2023AJ....166...34Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/34CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/226 : Stellar polarization catalogs agglomeration (Heiles, 2000)I/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)I/354 : StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/453/635 : Modelling Galactic Interstellar Extinction (Marshall+, 2006)J/ApJ/665/369 : Photopolarimetry of Southern Coalsack stars (Andersson+, 2007)J/AJ/156/241 : 1st catalog variable stars measured by ATLAS (Heinze+, 2018)J/A+A/625/A135 : Galac interstellar dust Gaia-2MASS 3D maps (Lallement+, 2019)J/A+A/624/L8 : Starlight polarization (Panopoulou+, 2019)J/ApJ/906/73 : Total/polar extinct/emission PostPlanck Era (Hensley+, 2021)J/A+A/649/A3 : Gaia Early Data Release3 photometric passbands (Riello+, 2021)J/A+A/661/A147 : Galactic interstellar dust Gaia-2MASS 3Dmap (Lallement+, 2022)J/A+A/664/A174 : Galactic interstellar dust Gaia-2MASS 3D maps (Vergely+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/34https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/166/34/tablea1 (Variable stars in IPS-GI catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/166/34/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/166/34/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/166/34/tablea1?GETtext/xml+votable180.050000true238.93509-54.550960.0055555555555555566/21669 29116 29156-29157 29318 29459 29517 29529 29531 30216-30217 30627 30632-30633 37753 37840 39279 39365 39793 41516 41654 41656 41658 41660 41663 41699 41725 41756 41758 41787 41812-41813 41873 42127 42206-42207 42228 42456-42457 42524 42532-42533 42541 42552 42795 43027 43041https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/166/34?format=asciidefaultJ/AJ/166/34/tablea1Variable stars in IPS-GI catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia-EDR3 source identifiermeta.id;meta.maincharRAJ2000[105/284] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-72/10] Declination (J2000)degpos.eq.dec;meta.mainField[0/58] IPS-GI field ID from Versteeg+, 2023AJ....165...87Vmeta.id;obs.fieldintClass? Database classification (1)src.classcharRef[1/3] Source database reference (2)meta.refint