! File: 1212C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:06:16:42 coverpage: title_1: HIGHLY EVOLVED STARS OF LOW MASS -- CYCLE 0 sci_cat: STELLAR ASTROPHYSICS sci_subcat: SUBLUMINOUS STARS proposal_for: GTO/HRS pi_fname: SARA pi_mi: R. pi_lname: HEAP pi_inst: NASA, GODDARD SPACE FLIGHT CENTER pi_country: USA pi_phone: 301-286-5359 keywords_1: PLANETARY NEBULAE, PLANETARY NUCLEI hours_pri: 12.90 num_pri: 9 wf_pc: Y fos: Y hrs: Y ! end of coverpage abstract: line_1: I propose to use the HRS to study highly evolved stars, line_2: particularly the central stars of planetary nebulae. The line_3: study includes (1) an attempt to detect and measure the flux line_4: from extremely hot stars (T>150,000 K), (2) an investigation line_5: of hydrogen and carbon-rich central stars and their recent line_6: ejecta, (3) an investigation of the interaction of the wind line_7: from a central star with the surrounding nebula, and (4) line_8: follow-up spectroscopic studies of uv-bright stars line_9: discovered in globular clusters. ! ! end of abstract general_form_proposers: lname: HARRINGTON fname: J. mi: P. inst: MARYLAND, UNIVERSITY OF country: USA ! lname: HEAP fname: SARA mi: R. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Cycle 0: PC images of NGC 2440 continuum and line_2: nebula (He II and H-beta). Lines 94.000-94.002. line_3: Cycle 1: NGC 7027 and NGC2392 (central star and line_4: bipolar jet). Lines 200-214. ! question: 4 section: 1 line_1: The resonance lines of the most abundant ions in the stellar atmosphere line_2: and in the nebula are in the ultraviolet. High-dispersion spectra of these line_3: lines help to define the physical properties, abundances, kinematics, etc. line_4: For some programs, pictures at high spatial resolution are also necessary line_5: to determine the nebular radius or to detect clots of nebular material. ! question: 5 section: 1 line_1: line_4: No special scheduling requirements are expected. ! question: 6 section: 1 line_1: line_3: Target 1 is very faint. Observations of this objects should be carried line_4: out only in low-dark periods. ! question: 7 section: 1 line_1: HOT-STAR: Extract stellar contribution to the total flux. Determine stellar line_2: far-uv flux below Lyman alpha. Deduce stellar temperature and lower limit to line_3: stellar mass. line_5: C-RICH: Measure velocity and column density of each component of a nebular line_6: spectral line. Derive nebular abundances and physical properties. line_8: WIND-NEB: Measure velocity and column density of each component of a nebular line_9: line. Deduce physical picture of the region where the wind interacts with the line_10: nebula. line_12: NPN-GC: Determine stellar contribution to observed flux. Estimate continuum line_13: temperature of star. Use spectral features to deduce stellar properties. ! question: 13 section: 1 line_1: We propose to study central stars of planetary nebulae, particularly (1) the line_2: extremely hot stars, (2) the carbon-rich stars and nebulae, (3) stars with line_3: strong winds that interact with the surrounding nebulae, and (4) uv-bright line_4: stars that will be discovered in globular clusters. ! !end of general form text general_form_address: lname: HEAP fname: SARA mi: R. category: PI inst: GODDARD SPACE FLIGHT CENTER addr_1: CODE 681 city: GREENBELT state: MD zip: 20771 country: USA phone: 301-286-5359 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: NGC2440-STAR descr_1: CENTRAL STAR OF PLANETARY NEBULA pos_1: RA= 07H 41M 55.31S +/- 1.5", pos_2: DEC= -18D 12' 31.2" +/- 1.5" equinox: 2000 pm_or_par: NO acqpr_1: BKG fluxnum_1: 1 fluxval_1: V=17.6 fluxnum_2: 2 fluxval_2: F(1300)=0.66E-13 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 94.000 targname: NGC2440-STAR config: PC opmode: IMAGE aperture: P6 sp_element: F517N num_exp: 1 time_per_exp: 20M priority: 2 param_1: PRE-FLASH=YES req_2: CYCLE 0 comment_1: FILTER SHOULD SERVE AS NARROW-BAND comment_2: CONTINUUM FILTER (EXCL. NEBULAR comment_3: EMISSION LINES) AND REVEAL CENTRAL comment_4: STAR REVISED IN LIGHT OF POST-LAUNCH comment_5: CAPABILITIES FOR CYCLE 0. comment_6: EARLY ACQ FOR 300-310 ! linenum: 94.001 targname: NGC2440-STAR config: PC opmode: IMAGE aperture: P6 sp_element: F469N num_exp: 1 time_per_exp: 5M priority: 2 param_1: PRE-FLASH=YES req_1: CYCLE 0 comment_1: NEW PICTURES ADDED TO ENABLE UV comment_2: PICTURE OF NEBULA. BACKGROUND TO comment_3: BE CALCULATED. HE-II. comment_4: REVISED IN LIGHT OF POST-LAUNCH comment_5: CAPABILITIES FOR CYCLE 0. comment_6: EARLY ACQ FOR 300-310 ! linenum: 94.002 targname: NGC2440-STAR config: PC opmode: IMAGE aperture: P6 sp_element: F487N num_exp: 1 time_per_exp: 5M priority: 2 param_1: PRE-FLASH=YES req_1: CYCLE 0 comment_1: NEW PICTURES ADDED TO ENABLE UV comment_2: PICTURE OF NEBULA. BACKGROUND TO comment_3: BE CALCULATED. H-BETA. comment_4: REVISED IN LIGHT OF POST-LAUNCH comment_5: CAPABILITIES FOR CYCLE 0. comment_6: EARLY ACQ FOR 300-310 ! ! end of exposure logsheet ! No scan data records found