! File: 1147C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:03:34:49 coverpage: title_1: LINE PROFILES OF ROTATING STARS sci_cat: STELLAR ASTROPHYSICS sci_subcat: HOT STARS proposal_for: GTO/HRS pi_title: PROF. pi_fname: JOHN pi_mi: B. pi_lname: HUTCHINGS pi_inst: DOMINION ASTROPHYSICAL OBSERVATORY pi_country: CANADA pi_phone: (604)388-3909 keywords_1: B STARS, ROTATION, GRAVITY DARKENING, LINE PROFILES hours_pri: 0.70 num_pri: 6 pi_position: NOT SHOWN ! end of coverpage abstract: line_1: HRS will be used in echelle mode to obtain line profiles of far UV features in line_2: highly rotating B stars. Comparison of these profiles with those at longer line_3: wavelengths obtained from the ground will be used to understand the surface line_4: gravity darkening and determine the orientation of the stellar rotation axis. ! ! end of abstract general_form_proposers: lname: HUTCHINGS fname: JOHN mi: B. inst: DOMINION ASTROPHYSICAL OBSERVATORY country: CANADA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: In rapidly rotating stars, the surface temperature and brightness varies with line_2: stellar latitude because of gravity darkening effects. Thus, line profiles in line_3: the far UV are seen principally towards high latitude areas of the star, while line_4: those in the visible and red are seen projected against the equator. line_5: Copernicus and IUE data have already been used to show that the effect is seen, line_6: and to derive estimates of the stellar rotation orientation. Existing UV data line_7: however lack S/N and resolution to do the work to its full potential. line_8: Further, some rotating stars appear to be unevenly bright, as indicated by line_9: asymmetries which move through line profiles in timescales of hours. Existing line_10: UV data on these effects are also too noisy to be useful. This program will line_11: obtain line profiles of high S/N and resolution of a small sample of stars line_12: previously studied with IUE, to address these problems. ! question: 3 section: 1 line_1: HRS echelle observations will be made at lambdalambda1248 and 1304 on each line_2: star, to obtain line profiles with S/N ~100. lambda1304 data to be repeated line_3: to look for changes. line_5: Priority 2 targets are in common with M. Jura. Target acquisition time to be line_6: shared. My repeat observations on these should be separated in time as much as line_7: possible. Suggest doing my observations first and last with Jura's in between, line_8: using single target acquisition for all. If target acquisition is to be line_9: charged twice for repeats, I need to be informed. Total time in this program line_10: should not significantly exceed 0.5 hours. line_12: Observations in any cycle. ! question: 4 section: 1 line_1: IUE and Copernicus data do not have required S/N. ! question: 5 section: 1 line_1: Share target acquisition with M. Jura. ! question: 7 section: 1 line_1: DAO VAX plus existing software will be used on ST standard processed spectra. line_2: The analysis will follow work done on Copernicus data and will likely line_3: incorporate line profile calculations to take full advantage of ST data line_4: quality. ! question: 8 section: 1 line_1: Improved ground-based data will be obtained in Victoria near to time(s) of ST line_2: observations. ! question: 13 section: 1 line_1: HRS echelle observations will be obtained of line profiles at line_2: lambdalambda1248, 1304 for several rapidly rotating B stars. Data will be line_3: used to determine gravity darkening and rotation orientation of stars. ! !end of general form text general_form_address: lname: HUTCHINGS fname: JOHN mi: B. title: PROF. category: PI inst: DOMINION ASTROPHYSICAL OBSERVATORY addr_1: 5071 W. SAANICH RD. addr_2: R.R. #5 addr_3: V8X 4M6 city: VICTORIA country: CANADA phone: (604) 388-3909 telex: 049-7295 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD23480 name_2: 23TAU descr_1: B6 STAR pos_1: RA = 3H 43M 21.26S +/- 0.05S, pos_2: DEC = +23D 47' 37" +/- 0.5" equinox: 1950 ! targnum: 2 name_1: HD23630 name_2: ETA-TAU descr_1: B7 STAR pos_1: RA = 3H 44M 30.48S +/- 0.05S, pos_2: DEC = +23D 57' 6.0" +/- 0.5" equinox: 1950 ! targnum: 3 name_1: HD24912 name_2: XI-PER descr_1: O7 STAR pos_1: RA = 3H 55M 42.84S +/- 0.05S, pos_2: DEC = +35D 38' 56.5" +/- 0.5" equinox: 1950 ! targnum: 4 name_1: HD56139 name_2: OMEGA-CMA descr_1: B3 STAR pos_1: RA = 7H 12M 46.93S +/- 0.05S, pos_2: DEC = -26D 41' 5.2" +/- 0.5" equinox: 1950 ! targnum: 5 name_1: HD145502 name_2: NU-SCO descr_1: B2 STAR pos_1: RA=16H9M5.06S +/- 0.05S, pos_2: DEC=-19D19'55.2" +/- 0.5" equinox: 1950 ! targnum: 6 name_1: HD148605 name_2: 22SCO descr_1: B2 STAR pos_1: RA = 16H 27M 9.88S +/- 0.05S, pos_2: DEC = -25D 0' 23.4" +/- 0.5" equinox: 1950 comment_1: UV FLUXES KNOWN FROM IUE DATA ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: OBS targname: # config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 30S priority: # req_1: ONBOARD ACQ FOR 2,3 ! linenum: 2.000 sequence_1: ^ targname: ^ config: ^ opmode: ACCUM aperture: 0.25 sp_element: ECH-A wavelength: 1248 num_exp: ^ time_per_exp: 30S s_to_n: 100 priority: ^ ! linenum: 3.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: 1304 num_exp: ^ time_per_exp: ^ s_to_n: ^ priority: ^ ! linenum: 4.000 sequence_1: USE sequence_2: OBS targname: HD23480 priority: 2 req_1: CYCLE 3 / 4-12 ! linenum: 5.000 sequence_1: ^ targname: ^ priority: ^ req_1: AFTER 4 BY 1H ! linenum: 6.000 sequence_1: ^ targname: HD24912 priority: ^ ! linenum: 7.000 sequence_1: ^ targname: ^ priority: ^ req_1: AFTER 6 BY 1H ! linenum: 8.000 sequence_1: ^ targname: HD145502 priority: ^ ! linenum: 9.000 sequence_1: ^ targname: ^ priority: ^ req_1: AFTER 8 BY 1H ! linenum: 10.000 sequence_1: USE sequence_2: OBS targname: HD148605 priority: 3 ! linenum: 11.000 sequence_1: ^ targname: HD23630 priority: ^ ! linenum: 12.000 sequence_1: USE sequence_2: OBS targname: HD56139 priority: 3 ! ! end of exposure logsheet ! No scan data records found