Table · dataset · 2023
RX J1604.3-213010 SPHERE polarimetric images
Listed in IVOA Registry (Virtual Observatory)
RX J1604 is a dipper source, and the data show different kinds of variability.
Description
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.
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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.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/A6 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...676A...6M ui.adsabs.harvard.edu/abs/2023A%26A...676A...6M ↗
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/a%2Ba/676/a6 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Image 65%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/676/a6 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:infrared | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |