! File: 3004C.PROP ! Database: PEPDB ! Date: 18-FEB-1994:09:51:31 coverpage: title_1: DUPLICITY AMONG HYADES STARS-PRELUDE proposal_for: SAT/AST pi_fname: WILLIAM pi_mi: H. pi_lname: JEFFERYS pi_inst: TEXAS, UNIVERSITY OF pi_country: USA pi_phone: 512-471-4461 keywords_1: DUPLICITY; BINARIES; MULTIPLE STARS; HYADES hours_pri: 20.00 num_pri: 40 pi_position: PROFESSOR OF ASTRONO ! end of coverpage abstract: line_1: We propose to use FGS in TRANSFER mode to examine, at high angular line_2: resolution, a representative sample of bright probable Hyades cluster members line_3: in an effort to establish the incidence of duplicity among Hyades stars. The line_4: frequency of multiple stars in stellar systems and populations represents a line_5: significant aspect of star formation and stellar evolution. line_7: Among Hyades stars brighter than V ~ 5.0, companions should be observable to line_8: Delta m ~ 2. Binaries of small Delta m should be readily detectable at V ~ 10. ! ! end of abstract general_form_proposers: lname: JEFFERYS fname: WILLIAM mi: H. inst: TEXAS, UNIVERSITY OF country: USA ! lname: FRANZ fname: OTTO mi: G. inst: LOWELL OBSERVATORY country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Line 1, page 11 defines, for each target, an observation consisting of line_2: a set of continuous scans at a scan rate of 0.06 arcsec per sec and a scan line_3: length of 1.2 arcsec per interferometer axis. There are 10 scans/observation line_4: (total exposure time 200 seconds), sufficient to permit detection of close line_5: companions to a Delta-m ~ 2 mag for stars of V