! File: 2009C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:00:07:14 coverpage: title_1: MASS LOSS IN LUMINOUS GLOBULAR CLUSTER STARS sci_cat: STELLAR ASTROPHYSICS sci_subcat: STELLAR ATMOSPHERES proposal_for: GO pi_title: PROF. pi_fname: ERIKA pi_lname: BOHM-VITENSE pi_inst: WASHINGTON, UNIVERSITY OF pi_country: USA pi_phone: (206) 543-4858 keywords_1: STARS, POPULATION II, GIANTS, MASS LOSS hours_pri: 3.00 num_pri: 3 wf_pc: X hrs: X funds_amount: 55358 funds_length: 12 funds_date: JUL-90 pi_position: PROFESSOR off_fname: DONALD off_mi: W. off_lname: ALLEN off_title: DIR.GRANT&CONTR.SERV off_inst: WASHINGTON, UNIVERSITY OF off_addr_1: MAIL STOP AD-24 off_city: SEATTLE off_state: WA off_zip: 98195 off_country: USA off_phone: 206-543-4043 off_telex: 4740096 ! end of coverpage abstract: line_1: We want to study the mass loss for stars at the tip of the line_2: red giant branch in globular clusters. It is well known that line_3: red giant stars in globular clusters need to lose mass in line_4: order to become blue horizontal branch stars. While we do line_5: not yet understand the mass loss mechnism we suspect that line_6: it takes place at the tip of the red giant branch where the line_7: gravitational binding of the atmospheric layers becomes line_8: small. Gratton,Pilachowski and Sneden (1984)find a correlation line_9: between H-alpha emission being observed for luminous stars line_10: on the red giant branch in globular clusters and the line_11: existence of a blue horizontal branch. We therefore suspect line_12: that mass loss and H-alpha emission are correlated. We want line_13: to check this by observing the Mg II line profiles at 2800 line_14: A in order to see whether "blue" shifted absorption line_15: components can be seen which are indicative of a strong line_16: mass loss and whether this mass loss, if present, is line_17: correlated with H-alpha emission and with the existence of line_18: a blue horizontal branch. ! ! end of abstract general_form_proposers: lname: BOHM-VITENSE fname: ERIKA title: P.I. inst: WASHINGTON, UNIVERSITY OF country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: We would like to take 1 WFC image of the star W 76 in 47 line_2: Tuc and the field around it at 2800 A for better target line_3: recognition and in order to see whether anything peculiar line_4: occurs in the surroundings of the target. This image will line_5: also give us a better estimate for the fluxes at 2800 A. line_6: The main object is the study of the MG II line profiles at line_7: 2800 A of the 4 target stars. We threfore want to take line_8: spectra of the target stars with the HRS and the G270M line_9: grating. ! !end of general form text general_form_address: lname: BOHM-VITENSE fname: ERIKA category: PI inst: UNIVERSITY OF WASHINGTON addr_1: ASTRONOMY DEPT. FM-20 city: SEATTLE state: WA zip: 98195 country: USA phone: (206) 543-4858 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC6397-211 descr_1: STAR:RED GIANT:POP II pos_1: PLATE-ID=8729, pos_2: RA = 17H 41M 25.56S +/- 0.3", DEC = pos_3: -53D 37' 38.43" +/- 0.3" equinox: 2000 fluxnum_1: 1 fluxval_1: F-CONT(2800) = 1.2 +/- 0.9 E-14 fluxnum_2: 2 fluxval_2: V =10.2 +/- 0.3, B-V=1.5, E(B-V)=0.17 ! targnum: 2 name_1: NGC6397-603 descr_1: STAR: RED GIANT: POP II pos_1: PLATE-ID=8729, pos_2: RA = 17H 40M 38.82S +/- 0.3", DEC = pos_3: -53D 45' 25.51" +/- 0.3" equinox: 2000 fluxnum_1: 1 fluxval_1: F-CONT(2800) = 1.0 +/- 0.8 E-14 fluxnum_2: 2 fluxval_2: V = 10.4 +/- 0.3, B-V=1.33, E(B-V)=0.17 ! targnum: 3 name_1: 47TUC-W76 descr_1: STAR: RED GIANT: POP II pos_1: PLATE-ID=9173, pos_2: RA = 00H 24M 03.21S +/- 5", DEC = -71D pos_3: 55' 47.04" +/- 5" equinox: 2000 fluxnum_1: 1 fluxval_1: F-CONT(2800) = 3.0 +/- 2.3 E-15 fluxnum_2: 2 fluxval_2: V = 11.5 +/- 0.3, B-V=1.58, E(B-V)=0.04 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: 47TUC-W76 config: WFC opmode: IMAGE aperture: ALL sp_element: F284W num_exp: 1 time_per_exp: 6.0M s_to_n: 15 fluxnum_1: 1 priority: 1 req_1: EARLY ACQ FOR 7; comment_1: EARLY ACQUISITION FOR 7 comment_2: EARLY FLUX ESTIMATE FOR 7 ! linenum: 2.000 targname: NGC6397-211 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 54.0S s_to_n: 5 fluxnum_1: 1 priority: 1 param_1: FAINT=60 req_1: ONBOARD ACQ FOR 3; DARK TIME ! linenum: 3.000 targname: NGC6397-211 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G270M wavelength: 2800 num_exp: 3 time_per_exp: 10.6M s_to_n: 10 fluxnum_1: 1 priority: 1 ! linenum: 4.000 targname: NGC6397-603 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 60.S s_to_n: 5 fluxnum_1: 2 priority: 1 param_1: FAINT=60 req_1: ONBOARD ACQ FOR 5; DARK TIME ! linenum: 5.000 targname: NGC6397-603 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G270M wavelength: 2800 num_exp: 3 time_per_exp: 11.7M s_to_n: 10 fluxnum_1: 1 priority: 1 ! linenum: 6.000 targname: 47TUC-W76 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 72S s_to_n: 5 fluxnum_1: 1 priority: 2 param_1: FAINT=60 req_1: ONBOARD ACQ FOR 7; DARK TIME ! linenum: 7.000 targname: 47TUC-W76 config: HRS opmode: ACCUM aperture: 2.0 sp_element: G270M wavelength: 2800 num_exp: 3 time_per_exp: 13.3M s_to_n: 10 fluxnum_1: 1 priority: 2 ! ! end of exposure logsheet ! No scan data records found