Table · dataset · 2022
HIRES radial velocity follow up of K2-182 & K2-199
Listed in IVOA Registry (Virtual Observatory)
We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets.
Description
We confirm the planetary nature of the massive sub-Neptune K2-182b (P_b_=4.7days, R_b_=2.69R{Earth}) and derive refined parameters for K2-199b and c (P_b_=3.2days, R_b_=1.73R{Earth} and P_c_= 7.4days, R_c_=2.85R{Earth}). These planets provide valuable data points in the mass-radius plane, especially as TESS continues to reveal an increasingly diverse sample of sub-Neptunes.
The moderately bright (V=12.0mag) early K dwarf K2-182 (EPIC 211359660) was observed during K2 campaigns 5 and 18. We find that K2-182b is potentially one of the densest sub-Neptunes known to date (20{+/-}5M{Earth} and 5.6{+/-}1.4g/cm^3^). The K5V dwarf K2-199 (EPIC212779596; V=12.3mag), observed in K2 campaigns 6 and 17, hosts two recently confirmed planets.
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We refine the orbital and planetary parameters for K2-199b and c by modeling both campaigns of K2 photometry and adding 12 Keck-HIRES measurements to the existing radial velocity data set (N=33). We find that K2-199b is likely rocky, at 6.9{+/-}1.8M{Earth} and 7.2_-2.0_^+2.1^g/cm^3^, and that K2-199c has an intermediate density at 12.4{+/-}2.3M{Earth} and 2.9_-0.6_^+0.7^g/cm^3^. We contextualize these planets on the mass-radius plane, discuss a small but intriguing population of "superdense" sub-Neptunes (R_p_<3R{Earth}, M_p_>20M{Earth}), and consider our prospects for the planets' atmospheric characterization.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/294 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021AJ....162..294M ui.adsabs.harvard.edu/abs/2021AJ....162..294M ↗
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/aj/162/294 ↗
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/aj/162/294 | 12 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 |