Nature of Faint Companions to G type Stars using Adaptive Optics

Details Nature of Faint Companions to G type Stars using Adaptive Optics Nature of Faint Companions to G type Stars using Adaptive Optics

2002-04-07

arxiv.org/abs/astro-ph/0204114v1

Astronomy and Astrophysics

Astrophysics

14 pages, 5 Figures, Accepted in the Astronomical Journal for publication

Scientific paper

10.1086/341378

High spatial resolution (0.30 arcsec) NIR photometric observations using the adaptive optics of the 100 inch Mt. Wilson Telescope and the Penn State IR Imager and Spectrograph (PIRIS) have revealed faint companions to HD190067 and HIP13855. HD190067b is found to be of mass of 0.075$M_{\odot}$ to 0.1$M_{\odot}$ and with an age of 0.5 Gyrs to a few Gyrs. HIP13855b is a low mass star (age: 100 Myrs to 500 Myrs) of mass range between 0.1$M_{\odot}$ to 0.2$M_{\odot}$. Further NIR spectroscopic observations will be necessary to classify their spectral type precisely.

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