uvby photometry and RVs of HD 74057 Virtual Observatory Resource

Authors
  1. Sowell J.R.
  2. Henry G.W.
  3. Fekel F.C.
  4. Published by
    CDS
Abstract

We have obtained Stromgren b and y differential photometric observations of the solar-type eclipsing binary HD 74057 plus follow-up high-resolution, red wavelength spectroscopic observations. The system has an orbital period of 31.2198 days, a high eccentricity of 0.47, and is seen almost exactly edge on with an inclination of 89.8{deg}. The two main-sequence G0 stars are nearly identical in all physical characteristics. We used the Wilson-Devinney program to obtain a simultaneous solution of our photometric and spectroscopic observations. The resulting masses of the components are M1=1.138+/-0.003M_{sun}_ and M2=1.131+/-0.003M_{sun}_, and the radii are R1=1.064+/-0.002R_{sun}_ and R2=1.049+/-0.002R_{sun}_. The effective temperatures are 5900K (fixed) and 5843K, and the iron abundance, [Fe/H], is estimated to be +0.07. A comparison with evolutionary tracks suggests that the system may be even more metal rich. The components rotate with periods of 8.4 days, significantly faster than the predicted pseudosynchronous period of 12.7days. We see evidence that one or both components have cool spots. Both stars are close to the zero-age main sequence and are about 1.0Gyr old.

Keywords
  1. visible-astronomy
  2. medium-band-photometry
  3. eclipsing-binary-stars
  4. f-stars
  5. late-type-stars
  6. radial-velocity
Bibliographic source Bibcode
2012AJ....143....5S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/143/5
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/143/5
Document Object Identifer DOI
doi:10.26093/cds/vizier.51430005

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/143/5
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/143/5
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/143/5
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2013-04-05T14:10:37Z
Resource record created
2013-04-05T14:10:37Z
Created
2017-06-19T07:56:58Z
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