! $Id: 5723,v 8.1 1995/03/15 17:54:13 pepsa Exp $ coverpage: title_1: CONSTRAINTS ON MASSIVE STAR EVOLUTION FROM CARBON AND OXYGEN title_2: ABUNDANCES IN LMC WC STARS sci_cat: HOT STARS sci_subcat: MASSIVE STARS proposal_for: GO/CAR cont_id: 4550 pi_fname: JOHN pi_mi: D pi_lname: HILLIER pi_inst: UNIVERSITAT MUENCHEN pi_country: GERMANY hours_pri: 13.28 num_pri: 4 fos: Y funds_amount: 141013 funds_length: 24 funds_date: SEP-93 off_fname: ROLF-PETER off_lname: KUDRITZKI off_title: DIRECTOR off_inst: INSTITUT F ASTRONOMY U ASTROPHYSIK DER UNIVERSITAET MUENCHEN off_addr_1: SCHEINERSTRASSE 1 off_addr_2: 8000 MUENCHEN 80 off_city: MUNICH off_country: GERMANY off_phone: +49-89-9220940 ! end of coverpage abstract: line_1: High signal-to-noise UV FOS spectra of a sample of WC-type Wolf-Rayet stars line_2: in the LMC will be obtained to determine C/He and O/C abundance ratios. line_3: These abundance ratios will provide urgently required constraints on the line_4: He-burning stage of the evolution of massive stars. The surface C/He and line_5: O/C abundance ratios in WC stars are influenced by mass loss, convection line_6: and overshooting, and the (uncertain) 12C(ALPHA,GAMMA)16O reaction rate. line_7: The spectra will be analyzed using sophisticated non-LTE radiative transfer line_8: codes which allow for spherical extension and stellar winds, and which line_9: incorporate the latest atomic data. Our quantitative analysis will also line_10: allow a determination of fundamental stellar parameters (eg Rstar, Teff), line_11: abundances of species such as Fe and Si, and accurate mass loss rates. line_12: These, and the C and O abundance determinations, will allow much tighter line_13: constraints to be placed on the evolution of massive stars. line_14: Starburst galaxies are currently an active area of research. Massive stars, line_15: including W-R stars, are seen to be playing a key role in the dynamics and line_16: evolution of these systems. It is imperative that we understand the line_17: evolution and properties of massive stars in the galaxy and LMC (where they line_18: are amenable to detailed spectroscopic studies) if we are to make reliable line_19: inferences concerning star formation rates, nucleosynthesis yields, line_20: and initial mass functions etc in starburst systems. ! ! end of abstract general_form_proposers: lname: HILLIER fname: JOHN title: PI mi: D inst: UNIVERSITAT MUENCHEN country: GERMANY esa: Y ! lname: HAMANN fname: WOLF-RAINER inst: UNIVERSITAT KIEL country: GERMANY esa: Y ! lname: WESSOLOWSKI fname: ULF inst: UNIVERSITAT KIEL country: GERMANY esa: Y ! lname: BUTLER fname: KEITH inst: UNIVERSITAT MUENCHEN country: GERMANY esa: Y ! lname: KUDRITZKI fname: ROLF mi: P inst: UNIVERSITAT MUENCHEN country: GERMANY esa: Y ! lname: LENNON fname: DANIEL mi: J inst: UNIVERSITAT MUENCHEN country: GERMANY esa: Y ! lname: VOELS fname: STEPHEN mi: A inst: UNIVERSITAT MUENCHEN country: GERMANY esa: Y ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Using FOS we will observe 4 WC4 stars in the LMC. Three sets of spectra, line_2: covering the wavelength ranges 1150-1606A (grating G130H), 1573-2330A line_3: (G190H), and 2222-3301A (G270H), will be obtained for each star. For line_4: HD32402, we will aim for a continuum S to N ratio in excess of 70:1, while line_5: for the other 3 stars we will aim for a S/N ratio of 40:1. The blue line_6: digicon will be used for all 3 regions. Although the red digicon could line_7: be used for region 2 (G190H), we feel that its rapid response variation line_8: near 1600A would adversely affect our ability to reliably combine this line_9: spectrum with that extending from 1150 to 1606A. The region from 1500-1700A line_10: is particularly important as it contains the CIV 1550 resonance doublet, line_11: and HeII 1640 whose formation is somewhat different from other HeII line_12: emission lines. We chose the blue detector for G270H because of detector line_13: stability (ie. one detector used continuously for all exposures), because line_14: of the slight increase in wavelength range allowing greater overlap with line_15: ground based observations, and because of overall system efficiency. line_17: As recommended by the TAC, observations of a further 3WC stars, and one WO line_18: star will be requested in a subsequent cycle. The selected stars have been line_19: the subject of an extensive optical observational study by Torres et al line_20: (1986), and show no evidence for binarity. They represent a complete sample line_21: of the known single WC/WO stars in the LMC. The v magnitudes (corrected for line_22: emission lines) range from 14th to 16.5th magnitude (Vacca and line_23: Torres-Dodgen 1990). ! question: 5 section: 1 line_1: NO GAP justification: The UV spectra of early type stars is known to vary line_2: with time. In order to obtain completely consistent UV spectra line_3: over our spectral range, we require that the spectra for our 3 wavelength line_4: ranges be obtained as close together as possible. In this case the NO GAP line_5: is provided by the ONBOARD ACQ requirements. The order does not matter line_6: hence we have not used the SEQ requirement. ! question: 6 section: 1 line_1: No special calibrations etc required. ! question: 8 section: 1 line_1: Revised target positions, obtained with GASP, are now supplied with the line_2: Phase 2 proposal. line_3: Target acquision strategies for HD32402, HD37680, and HD32257 provided line_4: by Tony Keyes. ! !end of general form text general_form_address: lname: HILLIER fname: JOHN mi: D category: PI inst: UNIVERSITY OF PITTSBURGH addr_1: DEPARTMENT OF PHYSICS AND ASTRONOMY addr_2: 3941 O'HARA STRREET addr_3: 100 ALLEN HALL city: PITTSBURGH, PA 15260 country: USA phone: 412-624-9000 from_date: 01-SEP-93 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD32402 name_2: WS6 name_3: BR10 descr_1: B,102; descr_2: HOST=LMC descr_3: TYPE=WC4 pos_1: PLATE-ID=05ZW, pos_2: RA = 04H 57M 24.191S +/- 0.50", pos_3: DEC = -68D 23' 57.23" +/- 0.50" equinox: 2000 rv_or_z: V= +280 acqpr_1: COMP comment_1: v=14.01 +/- 0.1 comment_2: e(b-v)=0.06 fluxnum_1: 001 fluxval_1: V=13.30 +/- 0.1, TYPE=WC4 fluxnum_2: 002 fluxval_2: B-V=-0.19 +/- 0.05 fluxnum_3: 003 fluxval_3: E(B-V)=0.07 +/- 0.03 fluxnum_4: 004 fluxval_4: F-CONT(5560)=9.0 +/- 0.5 E-15 fluxnum_5: 005 fluxval_5: F-CONT(2225)=1.7 +/- 0.2 E-13 fluxnum_6: 006 fluxval_6: F-CONT(1690)=4.5 +/- 0.1 E-13 fluxnum_7: 007 fluxval_7: F-CONT(1285)=1.0 +/- 0.1 E-12 ! targnum: 11 name_1: HD37026 name_2: WS31 name_3: BR43 descr_1: B,102; descr_2: HOST=LMC descr_3: TYPE=WC4 pos_1: PLATE-ID=05ZW, pos_2: RA = 05H 30M 12.216S +/- 0.50", pos_3: DEC = -67D 26' 08.49" +/- 0.50" equinox: 2000 rv_or_z: V= +280 comment_1: v=14.46 +/- 0.1 comment_2: e(b-v)=0.05 fluxnum_1: 001 fluxval_1: V=13.60 +/- 0.1, TYPE=WC4 fluxnum_2: 002 fluxval_2: B-V=-0.31 +/- 0.05 fluxnum_3: 003 fluxval_3: E(B-V)=0.06 +/- 0.02 fluxnum_4: 004 fluxval_4: F-CONT(5560)=7.0 +/- 0.5 E-15 fluxnum_5: 005 fluxval_5: F-CONT(2225)=6.9 +/- 0.5 E-14 fluxnum_6: 006 fluxval_6: F-CONT(1690)=1.8 +/- 0.2 E-13 fluxnum_7: 007 fluxval_7: F-CONT(1285)=4.6 +/- 0.5 E-13 ! targnum: 21 name_1: HD37680 name_2: WS35 name_3: BR50 descr_1: B,102; descr_2: HOST=LMC descr_3: TYPE=WC4 pos_1: PLATE-ID=05ZW, pos_2: RA = 05H 34M 19.387S +/- 0.50", pos_3: DEC = -69D 45' 10.08" +/- 0.50" equinox: 2000 rv_or_z: V= +280 comment_1: v=14.27 comment_2: e(b-v)=0.01 fluxnum_1: 001 fluxval_1: V=13.35 +/- 0.1, TYPE=WC4 fluxnum_2: 002 fluxval_2: B-V=-0.20 +/- 0.05 fluxnum_3: 003 fluxval_3: E(B-V)=0.01 +/- 0.03 fluxnum_4: 004 fluxval_4: F-CONT(5560)=8.0 +/- 0.5 E-15 fluxnum_5: 005 fluxval_5: F-CONT(2225)=9.2 +/- 0.5 E-14 fluxnum_6: 006 fluxval_6: F-CONT(1690)=1.7 +/- 0.2 E-13 fluxnum_7: 007 fluxval_7: F-CONT(1285)=4.5 +/- 0.1 E-13 ! targnum: 31 name_1: HD32257 name_2: WS4 name_3: BR8 descr_1: B,102; descr_2: HOST=LMC descr_3: TYPE=WC4 pos_1: PLATE-ID=05ZW, pos_2: RA = 04H 56M 02.952S +/- 0.50", pos_3: DEC = -69D 27' 21.59" +/- 0.50" equinox: 2000 rv_or_z: V= +280 comment_1: v=15.12 +/- 0.1 comment_2: e(b-v)=0.06 fluxnum_1: 001 fluxval_1: V=14.27 +/- 0.1, TYPE=WC4 fluxnum_2: 002 fluxval_2: B-V=-0.20 +/- 0.05 fluxnum_3: 003 fluxval_3: E(B-V)=0.07 +/- 0.03 fluxnum_4: 004 fluxval_4: F-CONT(5560)=3.5 +/- 0.2 E-15 fluxnum_5: 005 fluxval_5: F-CONT(2225)=3.2 +/- 0.2 E-14 fluxnum_6: 006 fluxval_6: F-CONT(1690)=7.8 +/- 0.2 E-14 fluxnum_7: 007 fluxval_7: F-CONT(1285)=2.2 +/- 0.1 E-13 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 11.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=1 param_2: SEARCH-SIZE-Y=3 param_3: SCAN-STEP-Y=1.204 req_1: CYCLE 4 / 11-117; req_2: ONBOARD ACQ FOR 12; ! linenum: 12.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=6 param_2: SEARCH-SIZE-Y=2 param_3: SCAN-STEP-X=.602 param_4: SCAN-STEP-Y=.602 req_1: ONBOARD ACQ FOR 13; ! linenum: 13.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.172 param_4: SCAN-STEP-Y=.172 req_1: ONBOARD ACQ FOR 14; ! linenum: 14.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.052 param_4: SCAN-STEP-Y=.052 req_1: ONBOARD ACQ FOR 15-17 ! linenum: 15.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G130H num_exp: 1 time_per_exp: 1050S s_to_n: 70 fluxnum_1: 5 priority: 1 ! linenum: 16.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G190H num_exp: 1 time_per_exp: 600S s_to_n: 70 fluxnum_1: 6 priority: 1 ! linenum: 17.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G270H num_exp: 1 time_per_exp: 400S s_to_n: 70 fluxnum_1: 7 priority: 1 ! linenum: 21.000 targname: HD37026 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G400H num_exp: 1 time_per_exp: 2S priority: 2 param_1: SEARCH-SIZE-X=1 param_2: SEARCH-SIZE-Y=3 param_3: SCAN-STEP-Y=1.204 req_1: ONBOARD ACQ FOR 22; ! linenum: 22.000 targname: HD37026 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G400H num_exp: 1 time_per_exp: 2S priority: 2 param_1: SEARCH-SIZE-X=6 param_2: SEARCH-SIZE-Y=2 param_3: SCAN-STEP-X=.602 param_4: SCAN-STEP-Y=.602 req_1: ONBOARD ACQ FOR 25-27; linenum: 23.000 targname: HD37026 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.172 param_4: SCAN-STEP-Y=.172 req_1: ONBOARD ACQ FOR 24 linenum: 24.000 targname: HD37026 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.052 param_4: SCAN-STEP-Y=.052 req_1: ONBOARD ACQ FOR 25-27; ! linenum: 25.000 targname: HD37026 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G130H num_exp: 1 time_per_exp: 740S s_to_n: 40 fluxnum_1: 5 priority: 2 ! linenum: 26.000 targname: HD37026 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G190H num_exp: 1 time_per_exp: 480S s_to_n: 40 fluxnum_1: 6 priority: 2 ! linenum: 27.000 targname: HD37026 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G270H num_exp: 1 time_per_exp: 320S s_to_n: 40 fluxnum_1: 7 priority: 2 ! linenum: 31.000 targname: HD37680 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G400H num_exp: 1 time_per_exp: 2S priority: 2 param_1: SEARCH-SIZE-X=1 param_2: SEARCH-SIZE-Y=3 param_3: SCAN-STEP-Y=1.204 req_1: ONBOARD ACQ FOR 32; ! linenum: 32.000 targname: HD37680 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 2 param_1: SEARCH-SIZE-X=6 param_2: SEARCH-SIZE-Y=2 param_3: SCAN-STEP-X=.602 param_4: SCAN-STEP-Y=.602 req_1: ONBOARD ACQ FOR 33; ! linenum: 33.000 targname: HD37680 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.172 param_4: SCAN-STEP-Y=.172 req_1: ONBOARD ACQ FOR 34; ! linenum: 34.000 targname: HD37680 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.052 param_4: SCAN-STEP-Y=.052 req_1: ONBOARD ACQ FOR 35-37 ! linenum: 35.000 targname: HD37680 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G130H num_exp: 1 time_per_exp: 750S s_to_n: 40 fluxnum_1: 5 priority: 2 ! linenum: 36.000 targname: HD37680 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G190H num_exp: 1 time_per_exp: 520S s_to_n: 40 fluxnum_1: 6 priority: 2 ! linenum: 37.000 targname: HD37680 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G270H num_exp: 1 time_per_exp: 230S s_to_n: 40 fluxnum_1: 7 priority: 2 ! linenum: 41.000 targname: HD32257 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 1S fluxnum_1: 4 priority: 2 param_1: FAINT=660.0, param_2: BRIGHT=33000.0 req_1: ONBOARD ACQ FOR 42; ! linenum: 42.000 targname: HD32257 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 5S fluxnum_1: 4 priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.172 param_4: SCAN-STEP-Y=.172 req_1: ONBOARD ACQ FOR 43; ! linenum: 43.000 targname: HD32257 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 5S fluxnum_1: 4 priority: 2 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.052 param_4: SCAN-STEP-Y=.052 req_1: ONBOARD ACQ FOR 44-46; ! linenum: 44.000 targname: HD32257 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G130H num_exp: 1 time_per_exp: 1600S s_to_n: 40 fluxnum_1: 5 priority: 2 ! linenum: 45.000 targname: HD32257 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G190H num_exp: 1 time_per_exp: 1100S s_to_n: 40 fluxnum_1: 6 priority: 2 ! linenum: 46.000 targname: HD32257 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G270H num_exp: 1 time_per_exp: 660S s_to_n: 40 fluxnum_1: 7 priority: 2 ! linenum: 111.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=1 param_2: SEARCH-SIZE-Y=3 param_3: SCAN-STEP-Y=1.204 req_1: ONBOARD ACQ FOR 112; ! linenum: 112.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=6 param_2: SEARCH-SIZE-Y=2 param_3: SCAN-STEP-X=.602 param_4: SCAN-STEP-Y=.602 req_1: ONBOARD ACQ FOR 113; ! linenum: 113.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.172 param_4: SCAN-STEP-Y=.172 req_1: ONBOARD ACQ FOR 114; ! linenum: 114.000 targname: HD32402 config: FOS/BL opmode: ACQ/PEAK aperture: 0.3 sp_element: G400H num_exp: 1 time_per_exp: 2S fluxnum_1: 4 priority: 1 param_1: SEARCH-SIZE-X=5 param_2: SEARCH-SIZE-Y=5 param_3: SCAN-STEP-X=.052 param_4: SCAN-STEP-Y=.052 req_1: ONBOARD ACQ FOR 115-117 ! linenum: 115.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G130H num_exp: 1 time_per_exp: 300S s_to_n: 70 fluxnum_1: 5 priority: 1 ! linenum: 116.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G190H num_exp: 1 time_per_exp: 600S s_to_n: 70 fluxnum_1: 6 priority: 1 ! linenum: 117.000 targname: HD32402 config: FOS/BL opmode: ACCUM aperture: 0.3 sp_element: G270H num_exp: 1 time_per_exp: 400S s_to_n: 70 fluxnum_1: 7 priority: 1 ! ! end of exposure logsheet