Radial velocity and astrometry for {mu} Arae

DOI

With Hubble Space Telescope Fine Guidance Sensor astrometry and published and previously unpublished radial velocity measures, we explore the exoplanetary system {mu}Arae. Our modeling of the radial velocities results in improved orbital elements for the four previously known components. Our astrometry contains no evidence for any known companion but provides upper limits for three companion masses. A final summary of all past Fine Guidance Sensor exoplanet astrometry results uncovers a bias toward small inclinations (more face-on than edge-on). This bias remains unexplained by small number statistics, modeling technique, Fine Guidance Sensor mechanical issues, or orbit modeling of noise-dominated data. A numerical analysis using our refined orbital elements suggests that planet d renders the {mu}Arae system dynamically unstable on a timescale of 105yr, in broad agreement with previous work.

Identifier
DOI http://doi.org/10.26093/cds/vizier.51630295
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/163/295
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/295
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/295
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/163/295
Provenance
Creator Benedict G.F.; McArthur B.E.; Nelan E.P.; Wittenmyer R.; Barnes R.,Smotherman H.; Horner J.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics