The very high-eccentricity binary HR 7345 Virtual Observatory Resource

Authors
  1. Farrington C.D.
  2. Fekel F.C.
  3. Schaefer G.H.
  4. ten Brummelaar T.A.
  5. Published by
    CDS
Abstract

After an 11-year observing campaign, we present the combined visual-spectroscopic orbit of the formerly unremarkable bright star HR 7345 (HD 181655, HIP 94981, GJ 754.2). Using the Separated Fringe Packet method with the CHARA Array, we were able to determine a difficult-to-complete orbital period of 331.609+/-0.004 days. The 11-month period causes the system to be hidden from interferometric view behind the Sun for three years at a time. Due to the high-eccentricity orbit of about 90% of a year, after 2018 January the periastron phase will not be observable again until late 2021. Hindered by its extremely high eccentricity of 0.9322+/-0.0001, the double-lined spectroscopic phase of HR 7345 is observable for 15 days. Such a high eccentricity for HR 7345 places it among the most eccentric systems in catalogs of both visual and spectroscopic orbits. For this system, we determine nearly identical component masses of 0.941+/-0.076 M_{sun}_ and 0.926+/-0.075 M_{sun}_ as well as an orbital parallax of 41.08+/-0.77 mas.

Keywords
  1. orbits
  2. interferometry
  3. spectroscopy
Bibliographic source Bibcode
2018AJ....156..144F
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/144
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/156/144
Document Object Identifer DOI
doi:10.26093/cds/vizier.51560144

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/144
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/156/144
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/156/144
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2019-03-19T06:34:43Z
Resource record created
2019-03-19T06:34:43Z
Created
2019-03-26T11:40:34Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr