J/A+A/676/A6ivo://CDS.VizieR/J/A+A/676/A6doi:10.26093/cds/vizier.36760006CDSMa J,. Schmid H.M.Tschudi C.2024-11-28T20:04:55Z2023-07-27T15:22:38ZCDS support team

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

cds-question@unistra.fremission-line-starspolarimetryinfrared-photometryRX J1604 is a dipper source, and the data show different kinds of variability. However, a detailed analysis of repeated measurements shows that the results are not affected by dipping events or atmospheric seeing variations. The bright disk of RX J1604 has a very simple axisymmetric structure and is therefore well suited as a benchmark object for accurate photo-polarimetric measurements. We derive accurate radial disk profiles for the intrinsic polarized intensity, Q{phi}(r)/I{star}, and measure different profile peak radii for different bands because of the wavelength dependence of the dust opacity. The disk-integrated polarization is Q{phi}/I{star}=0.92+/-0.04% for the R band and 1.51+/-0.11% for the J band, indicating a red color for the polarized reflectivity of the disk. The intensity of the disk is I{disk}/I{star}=3.9+/-0.5% in the J band, and the fractional polarization is p{phi}=38+/-4% for the J band and 42+/-2% for the H band. The comparison with the IR excess for RX J1604 yields an apparent disk albedo of about {Lambda}{I}~0.16+/-0.08. We also find that previously described shadows seen in the R band data are likely affected by calibration errors. Using dust scattering models for transition disks, We derive approximate J band values for the scattering albedo {omega}~0.5, scattering asymmetry g~0.5, and scattering polarization p_max_~0.7 for the dust. Because p_{phi}_ and {Lambda}{I} depend predominantly on dust scattering parameters and only weakly on the disk geometry, these parameters define tight relations for the dust scattering parameters {omega} and p_max_ and {omega} and g. The positive R to J band color for the polarized reflectivity, (Q{phi}/I{star})_J_~1.64x(Q{phi}/I{star})_R_, is mainly a result of the wavelength dependence of dust parameters because the scattering geometry is expected to be very similar for different colors. This work demonstrates the potential of accurate photo-polarimetric measurements of the circumstellar disk RX J1604 for the determination of dust scattering parameters that strongly constrain the physical properties of the dust.2023A&A...676A...6Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/A6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/598/A43 : 2MASS J16042165-2130284 high-contrast images (Canovas+, 2017)J/A+A/633/A37 : RXJ1604.3-2130A griz and JHK light curveshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/676/A6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/676/A6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/676/A6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/676/A6https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/676/A6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/676/A6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/676/A6/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/676/A6/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/676/A6/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/676/A6/list?GETtext/xml+votable180.050000true241.08976-21.508280.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/676/A66/44361https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/676/A6?format=asciiInfrareddefaultJ/A+A/676/A6/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of slicesmeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar