Search Publications

Radial Velocity Search for Extrasolar Planets in Visual Binary Systems

Sato, Bun'ei; Itoh, Yoichi; Oasa, Yumiko +7 more

We searched for extrasolar planets in visual binary systems using precise Doppler-shift measurements taken over a period of 4 yr. Using the HIgh Dispersion Echelle Spectrograph (HIDES) equipped on the Okayama Astrophysical Observatory (OAO) 188cm reflector, we achieved a radial-velocity precision of about 10ms^-1. We monitored both prima…

Search for Remnant Clouds Associated with the TW Hya Association

Tachihara, Kengo; Fukui, Yasuo; Neuhäuser, Ralph

We report on a search for the parental molecular clouds of the TW Hya association (TWA), using CO emission and NaI absorption lines. TWA is the nearest young (∼50pc; ∼10Myr) stellar association; yet in spite of its youth there has been no detection of any associated natal molecular gas, as is the case with other typical young clusters. Using infra…