Table · dataset · 2026
HD 161098 RVs and activity indicators
Listed in IVOA Registry (Virtual Observatory)
The development of refined instruments and techniques for a detailed analysis of the radial velocities (RVs) of stars other than the Sun allows the presence of planetary signals of amplitude below 1m/s to be investigated.
Description
Long-term RV surveys allow the detection of Earth-like and super-Earth-like planets in the habitable zones of Sun-like stars, prime targets for future missions for the atmospheric characterization of exoplanets.
We present the analysis of the nearby G8 V-type star HD 161098 (V=7.68mag, d=29.75pc). We searched for terrestrial planets in the habitable zone. We combined historical datasets with new data collected in an ongoing blind search program with HARPS, HARPS-N, and ESPRESSO.
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We utilized recently developed tools to extract RVs and to deal with the analysis of stellar activity. We performed a joint analysis of RVs and activity indicators to separate the planetary signals from those related to activity. We detected two sub-m/s1 signals that we claim as candidate planets.
We are not able to confirm their nature with certainty. Candidate HD 161098 b has an orbital period of 72.578_-0.060_^+0.059^d and a minimum mass of 3.63+/-0.59M_{Earth}_. HD 161098 c has an orbital period of 682.5_-9.9_^+9.5^d and a minimum mass of 7.8_-1.4_^+1.5^M_{Earth}_.
If confirmed, candidate HD 161098 c would reside in the optimistic habitable zone of the star. We find a magnetic cycle of 4090_-130_^+140^d period and a rotation period of 28.22_-0.35_^+0.30^d. Our analysis sets the stage for future observing campaigns of the star, finalized for the confirmation of our results.
We are entering the sub-m/s era at long orbital periods with a combination of stellar activity treatment and long-term campaigns.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A123 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...709A.123N ui.adsabs.harvard.edu/abs/2026A%26A...709A.123N ↗
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/709/a123 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 70%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/709/a123 | 15 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 (70%) |
| 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 |