An upper bound on the 1.6 micron flux ratio of the companion to ρ coronae borealis

C. Bender*, M. Simon, L. Prato, T. Mazeh, S. Zucker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We use high-resolution infrared spectroscopy to investigate the 2001 report by Gatewood and colleagues that ρ CrB's candidate extrasolar-planet companion is really a low-mass star with mass 0.14 ± 0.05 M⊙. We do not detect evidence of such a companion; the upper bounds on the (companion-to-primary) flux ratio at 1.6 μm are less than 0.0024 and 0.005 at the 90% and 99% confidence levels, respectively. Using the H-band mass-luminosity relationship calculated by Baraffe and colleagues, the corresponding upper limits on the companion mass are 0.11 and 0.15 M⊙. Our results indicate that the infrared spectroscopic technique can detect companions in binaries with flux ratios as low as 0.01 to 0.02.

Original languageEnglish
Pages (from-to)402-408
Number of pages7
JournalAstronomical Journal
Volume129
Issue number1
DOIs
StatePublished - Jan 2005

Keywords

  • Binaries: Spectroscopic
  • Stars: Individual (ρ Coronae Borealis)
  • Techniques: Radial velocities
  • Techniques: Spectroscopic

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