! File: 4206C.PROP ! Database: PEPDB ! Date: 20-FEB-1994:13:14:09 coverpage: title_1: IMAGING AND SPECTROSCOPY OF SUPER METAL POOR GALAXIES title_2: SPECTROSCOPY PART sci_cat: GALAXIES & CLUSTERS sci_subcat: NEARBY GALAXIES proposal_for: GO cont_id: 2416 pi_title: DR. pi_fname: REGINALD pi_mi: J. pi_lname: DUFOUR pi_inst: RICE UNIVERSITY pi_country: USA pi_phone: 713-527-4939 keywords_1: DWARF GALAXY, IRREGULAR GALAXY, NEARBY GALAXY, keywords_2: NEBULA, HII REGION hours_pri: 8.60 num_pri: 1 wf_pc: Y foc: Y fos: Y funds_amount: 93763 funds_length: 12 funds_date: AUG-91 pi_position: PROFESSOR off_fname: EDWARD off_mi: F off_lname: HAYES off_title: VP FOR RESEARCH off_inst: RICE UNIVERSITY off_addr_1: P.O. BOX 2692 off_city: HOUSTON off_state: TX off_zip: 77252 off_country: USA off_phone: 713-527-6054 off_telex: 62013673 ! end of coverpage abstract: line_1: We propose to obtain WF and FOC/48 imagery of one of the nearest of line_2: the super-metal-poor blue irregular galaxies known, GR8. The imagery will line_3: be obtained through wide band UV, B, V, R, and I filters and narrow-band line_4: filters isolating H-alpha and [OIII]5007. The wide-band imagery will be line_5: used to evaluate the massive star IMF, determination of the age distribution line_6: of groups of unresolved stars in the galaxies, and detect possible extended line_7: halo indicative of an old stellar population. The narrow band imagery will line_8: be used to identify the amount and spectral index of the ionizing radiation line_9: from OB stars, and detect supernova remnants, planetary nebulae, and line_10: emission-line stars. It is hoped that the results will enable us to evaluate line_11: the chemical and stellar evolutionary history of these relatively rare line_12: systems and their place in the larger picture of galaxy formation and line_13: evolution. ! ! end of abstract general_form_proposers: lname: DAVIDSON fname: KRIS inst: MINNESOTA, UNIVERSITY OF country: USA ! lname: SKILLMAN fname: EVAN inst: MINNESOTA, UNIVERSITY OF country: USA ! lname: ROY fname: JEAN-RENE inst: LAVAL UNIVERSITY country: CANADA ! lname: DUFOUR fname: REGINALD title: P.I. mi: J. inst: RICE UNIVERSITY country: USA ! lname: SHIELDS fname: GREGORY mi: A. inst: TEXAS, UNIVERSITY OF country: USA ! lname: MCCALL fname: MARSHALL mi: L. inst: YORK UNIVERSITY country: CANADA ! lname: CLAYTON fname: DONALD mi: D. inst: CLEMSON UNIVERSITY country: USA ! lname: WU fname: CHI-CHAO inst: COMPUTER SCIENCES CORPORATION country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Highest priority is Wide-Field Camera imagery of GR8 through F336W, F439W, & line_2: F555W filters (effectively providing UBV photometry of resolved stars line_3: and Q-index mapping of unresolved stellar population). In addition, WFC line_4: exposures through F702W & F785LP filters will enable us to study R-I and the line_5: old stellar population. WFC images through F502N & F656N will enable us to line_6: study the ionized gas in the system (via mapping H-alpha and [OIII]5007-- line_7: noting that F502N and F656N are suited for GR8's low mean radial velocity line_8: of +171 km/s-- will be used to study the morphology and physics of the line_9: ionized gas, for which the ratio gives a UV field ionization parameter; as line_10: well as search for strong [OIII] shock ionized features suggestive of SNRs-- line_11: even emission line stars, & luminous PNe may be detectable). Finally, a line_12: FOC/48 exposure of the center of GR8 through a UV filter (F150W) will enable line_13: the hot stellar population to be mapped and the UV ionizing sources line_14: quantified. Since the B(25) isophotal diameter of GR8 is 79 arc sec the WFC line_15: field is a good match for imaging almost the entire system. Since the line_16: brightest stars are known to be at V=19.5, and our UBVRI exposures are line_17: expected to reach 24-25 mag with reasonable photometric accuracy, we expect line_18: to be able to resolve and measure magnitudes and colors for the brightest 5 line_19: magnitudes of the massive star stellar population in GR8. Comparison of line_20: their characteristics with those in other galaxies like the Milky Way and the line_21: Magellanic Clouds; systems of different metallicity and possible different line_22: evolutionary histories is of astrophysical interest, as well as confirming line_23: the reported flattening of the luminosity function of the GR8 stellar ! !end of general form text general_form_address: lname: DUFOUR fname: REGINALD mi: J. title: DR. category: PI inst: RICE UNIVERSITY addr_1: SPACE PHYSICS DEPT. addr_2: P.O. BOX 1892 city: HOUSTON state: TX zip: 77251 country: USA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HIIR-GR8 descr_1: H, 503 pos_1: RA = 12H 58M 38.34S +/- 0.1S, pos_2: DEC = +14D 12' 50.12" +/- 1" equinox: 2000 rv_or_z: V = +171 comment_1: MAGS/COLORS ARE FOR BRIGHT STARS comment_2: SURF-LINES ARE FOR H II REGION fluxnum_1: 1 fluxval_1: V = 19.76, E(B-V) =0.19 fluxnum_2: 2 fluxval_2: B-V = -0.09, U-B = -1.19 fluxnum_3: 3 fluxval_3: SURF-LINE(6563) = 2.0 E-15 fluxnum_4: 4 fluxval_4: SURF-LINE(5007) = 1.2 E-15 fluxnum_5: 5 fluxval_5: SURF-LINE(1909) = 5.0 E-16 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 9.000 targname: HIIR-GR8 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 300S s_to_n: 10 fluxnum_1: 5 priority: 1 req_1: CYCLE 1; req_2: ONBOARD ACQ FOR 10.0; req_3: SEQ 9.0-10.0 NO GAP ! linenum: 10.000 targname: HIIR-GR8 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G160L num_exp: 1 time_per_exp: 2400S s_to_n: 10 fluxnum_1: 5 priority: 1 req_1: CYCLE 1; ! ! end of exposure logsheet ! No scan data records found