Table · dataset · 2022
Solar dipole from supernovae Ia
Listed in IVOA Registry (Virtual Observatory)
We determine the proper motion of the Solar system from the Pantheon sample of supernovae (SNe) of type Ia.
Description
The posterior distribution of the Solar system proper velocity, its direction and relevant cosmological parameters are obtained based on the observed distance moduli, heliocentric redshifts, and positions of SNe by means of a Markov Chain Monte Carlo method. We account for the unknown peculiar motion of SNe by including their expected covariance from linear theory.
We find that the Solar system moves with v_o_=249+/-51km/s towards RA=166+/-16deg, Dec=10+/-19deg (J2000) (all at 68% C.L.). The direction of motion agrees with the direction of the dipole observed in the cosmic microwave background (CMB) (RA=166deg, Dec=-7deg). The inferred velocity is 2.4{sigma} smaller than the value inferred from a purely kinematic interpretation of the CMB dipole (370km/s).
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Assuming a flat {Lambda} cold dark matter model, we find no degeneracy of Solar proper motion with other cosmological parameters. The dimensionless matter density, {Omega}_M_=0.305+/-0.022, is in excellent agreement with CMB measurements. We also find no degeneracy of the Solar proper motion with the SN calibration nuisance parameter.
Bulk flows might be able to explain why the solar motion appears to be slower w.r.t. nearby SNe. We conclude that a larger sample of SNe, distributed over wide areas of sky and a broad range in redshift, will allow an independent and robust test of the kinematic nature of the CMB dipole.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/668/A34 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2022A&A...668A..34H ui.adsabs.harvard.edu/abs/2022A%26A...668A..34H ↗
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/668/a34 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/668/a34 | 14 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:optical | source · 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 |