Table · dataset · 2023
51 Eri b SPHERE/IFS YH spectrum
Listed in IVOA Registry (Virtual Observatory)
51 Eridani b is one of the closest directly imaged exoplanets (~11au).
Description
We aim to better constrain its atmospheric properties by using a retrieval approach on higher signal-to-noise ratio data than previously reported. We present a higher signal-to-noise ratio YH spectrum of the planet and revised K1K2 photometry (M_K1_=15.11+/-0.04mag, M_K2_=17.11+/-0.38mag).
We compare the results of using the atmospheric retrieval code petitRADTRANS to a self-consistent model to fit our near-infrared SPHERE observations. Additionally, we attempt to reproduce previous results with the retrieval approach and compare the results to self-consistent models using the best-fit parameters from the retrieval as priors. The best-fit parameters obtained using an atmospheric retrieval differ from previous results using self-consistent models.
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In general, we find that our solutions tend towards cloud-free atmospheres (e.g. log_tau_clouds=~5.20+/-1.44). For our 'nominal' model with new data, we find a lower metallicity ([Fe/H]=0.26+/-0.30dex) and C/O ratio (0.38+/-0.09), and a slightly higher effective temperature (T_eff_=807+/-45K) than previous studies. The surface gravity (logg=4.05+/-0.37) is in agreement with the reported values in the literature within uncertainties.
We estimate the mass of the planet to be between 2 and 4M_Jup_. When comparing with self-consistent models, we encounter a known correlation between the presence of clouds and the shape of the P-T profiles. Our findings support the idea that results from atmospheric retrievals should not be discussed in isolation, but rather along with self-consistent temperature structures obtained using the retrieval's best-fit parameters.
This, along with observations at longer wavelengths, might help to better characterise the atmospheres and determine their degree of cloudiness.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/673/A98 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...673A..98B ui.adsabs.harvard.edu/abs/2023A%26A...673A..98B ↗
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/673/a98 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 74%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/673/a98 | 14 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 (74%) |
| 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 | |
| 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 |