Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5494 Report Date: 18-Jul-95:17:31 Version: ********** Check-in Date: ********** 1.Proposal Title: STELLAR WINDS OF MASSIVE STARS IN NEARBY GALAXIES ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID HOT STARS GO 3 Long Term yrs 2581 Sub Category MASSIVE STARS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Luciana Bianchi 3470 USA 410-516-4009 ------------------------------------------------------------------------------------ 7. Abstract In a cycle 1 program, we obtained the first FOS spectra of O stars in M31. These observations were very successful. The spectra enabled us to study the stellar winds of five stars, deriving mass-loss rates and velocity laws from wind line-profile fitting with the SEI method, and information on the abundances. In all stars we find differences between M31 and the Milky Way, suggesting global differences in the star formation history. Interstellar extinction curves were derived within M31, and the galactic and M31 ISM absorption lines could be separated by the high rotation velocity of M31. This work needs to be extended to more stars, at different locations in M31 (to test for dependence on galactocentric distance), to different spectral types, and to stars in the other major galaxy of the Local Group, M33. We propose to obtain FOS spectra of a carefully selected group of hot stars in these galaxies. For the new selected targets we have accurate spectral types from our ground based high resolution, high S/N spectra, ground-based optical photometry and UV flux levels known from either IUE spectra or UIT photometry. Targets are selected in uncrowded regions, to avoid acquisition problems and UV flux contamination from companions. We plan PC images to check for faint companions of the target stars, and parallel images with WFPC to study the OB populations in M31 and M33. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 14.7 par: 0. 10. Num targs pri: 7 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: FOS WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5494 PI: Luciana Bianchi Proposal Title: STELLAR WINDS OF MASSIVE STARS IN NEARBY GALAXIES ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ John Hutchings 4628 CANADA Phillip Massey 2902 USA Rolf Kudritski 5588 GERMANY X Henny Lamers 6854 NETHERLANDS X Giovanna De Francesco 6438 ITALY X Ralph Bohlin 3470 USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. We require the spectrum over the range 1200-3300A. We propose to observe with the FOS (R=1000) as in our Cycle 1 observations, covering the range 1150-3300A with three different gratings (G130H, G190H, G270H). The targets are selected from the brightest and hottest stars known in these galaxies. We have optical CCD photometry and spectra, and low resolution IUE spectra and UIT UV photometry that allow us to establish the spectral type, luminosity class and to compute FOS exposure times. We require the mean S/N in the G130H range to be not less than 20 per resolution element. Each exposure may be split into several integrations, that will be co-added to reach the required S/N. The targets are chosen to be isolated, so as to avoid acquisition and interpretation problems. The binary acquisition worked perfectly in the Cycle 1 observations with the 1 arcsec aperture. We are requesting short PC exposures of all target stars to check for the presence of faint companions that might contaminate the UV spectra at low level and that may be undetected in our ground based or UIT data. We have also requested parallel PC images in continuum and emission line light to study the luminous stellar populations in these galaxies. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Only HST has the required spectral resolution and S/N in the UV ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. None ------------------------------------------------------------------------------------ 8. Additional comments or special requests. No roll angle or other constraints for parallel exposures ------------------------------------------------------------------------------------ 9. Description of previous HST work. Similar observations successful done on M31 stars in cycle 1 and 2 ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). All necessary ------------------------------------------------------------------------------------ 11. Address Information Name: LUCIANA BIANCHI Category: PI Institution: 3470 Address: City: State: Zip Code: Country: Telephone: 410-516-4009 Telex (or e-mail): FOS::BIANCHI ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5494 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 M33-OB6-5 B, 105 RA = 01H 33M 54.81S +/- 2000. 1 V=18.0 +/- .1,TYPE=O 0.1S, 1 B-V=0 DEC = +30D 32' 22.9" +/- 1.0" ------------------------------------------------------------------------------------------------------------------------------------ 2 M33-FUV016 B, 105 RA = 01H 32M 37.707S +/- 2000. 1 V=17.5 +/- .1,TYPE=O 0.1S, 1 B-V=0 DEC = +30D 40' 05.7" +/- 1.0" ------------------------------------------------------------------------------------------------------------------------------------ 3 M33-OB21-108 B, 105 RA = 01H 33M 0.84S +/- 0.1S, 2000. 1 V=17.3 +/- .1,TYPE=O DEC = +30D 35' 5.1" +/- 1.0" 1 B-V=0 ------------------------------------------------------------------------------------------------------------------------------------ 4 M31-OB78-292 B, 105 RA = 00H 37M 47.1S +/- 0.1S, 1950. 1 V=17.0 +/- .1,TYPE=O DEC = +40D 29' 01" +/- 1.0" 1 B-V=-0.21 ------------------------------------------------------------------------------------------------------------------------------------ 5 M33-OB2-4 B, 105 RA = 01H 33M 58.69S +/- 2000. 1 V=17.1 +/- .1,TYPE=O 0.1S, 1 B-V=-0.19 DEC = +30D 35' 26.3" +/- 1.0" ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST c)Generic Targets ID = 5494 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 7 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Selection Criteria |Acqui|FLX| Flux data No | Name | Description | |Prblm|REF| | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 6 M33-OB6-5- FIELD NEAR TARGET 1 TARGETS=1,2,3,4,5 FIELD ------------------------------------------------------------------------------------------------------------------------------------ 7 M33-FUV016- FIELD NEAR TARGET 2 TARGETS=1,2,3,4,5 FIELD ------------------------------------------------------------------------------------------------------------------------------------ 8 M33-OB21-108 FIELD NEAR TARGET 3 TARGETS=1,2,3,4,5 -FIELD ------------------------------------------------------------------------------------------------------------------------------------ 9 M31-OB78-292 FIELD NEAR TARGET 4 TARGETS=1,2,3,4,5 -FIELD ------------------------------------------------------------------------------------------------------------------------------------ 10 M33-OB2-4- FIELD NEAR TARGET 5 TARGETS=1,2,3,4,5 FIELD ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5494 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 0.5 M33-OB6-5 WFPC2 IMAGE PC1 F606W 1 350S 1 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 1 M33-OB6-5 FOS/BL ACQ/ 4.3 MIRROR 1 11.5S 1 ONBOARD ACQ FOR 2- BINARY 4 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 2 M33-OB6-5 FOS/BL ACCUM 1.0 G130H 1150- 1 95M 1 CYCLE 4 1606 ------------------------------------------------------------------------------------------------------------------------------------ 3 M33-OB6-5 FOS/BL ACCUM 1.0 G190H 1573- 1 20M 1 CYCLE 4 2330 ------------------------------------------------------------------------------------------------------------------------------------ 4 M33-OB6-5 FOS/BL ACCUM 1.0 G270H 2222- 1 8M 1 CYCLE 4 3301 ------------------------------------------------------------------------------------------------------------------------------------ 4.5 M33-OB6-5- WFPC2 IMAGE WFALL F160BW CR-SPLIT=NO 1 15M 1 PAR FIELD CYCLE 4 SEQ 4.5-4.7 NO GAP Comments: EXPOSURE LINKED WITH LINE 2.0 ------------------------------------------------------------------------------------------------------------------------------------ 4.6 M33-OB6-5- WFPC2 IMAGE WFALL F300W 1 6M 1 CYCLE 4 FIELD PAR Comments: EXPOSURE LINKED WITH LINE 2.0 ------------------------------------------------------------------------------------------------------------------------------------ 4.7 M33-OB6-5- WFPC2 IMAGE WFALL F555W 1 5M 1 PAR FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 2.0 ------------------------------------------------------------------------------------------------------------------------------------ 10.5 M33-FUV016 WFPC2 IMAGE PC1 F606W 1 350S 1 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 11 M33-FUV016 FOS/BL ACQ/ 4.3 MIRROR 1 45S 1 ONBOARD ACQ FOR 12 BINARY -14 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 12 M33-FUV016 FOS/BL ACCUM 1.0 G130H 1150- 1 76M 1 CYCLE 4 1606 ------------------------------------------------------------------------------------------------------------------------------------ 13 M33-FUV016 FOS/BL ACCUM 1.0 G190H 1573- 1 15M 1 CYCLE 4 2330 ------------------------------------------------------------------------------------------------------------------------------------ 14 M33-FUV016 FOS/BL ACCUM 1.0 G270H 2222- 1 7M 1 CYCLE 4 3301 ------------------------------------------------------------------------------------------------------------------------------------ 14.5 M33-FUV016- WFPC2 IMAGE WFALL F160BW CR-SPLIT=NO 1 15M 1 PAR FIELD CYCLE 4 SEQ 14.5-14.7 NO GAP Comments: EXPOSURE LINKED WITH LINE 12.0 ------------------------------------------------------------------------------------------------------------------------------------ 14.6 M33-FUV016- WFPC2 IMAGE WFALL F300W 1 6M 1 PAR FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 12.0 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5494 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 14.7 M33-FUV016- WFPC2 IMAGE WFALL F555W 1 5M 1 PAR FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 12.0 ------------------------------------------------------------------------------------------------------------------------------------ 20.5 M33-OB21- WFPC2 IMAGE PC1 F606W 1 350S 1 CYCLE 4 108 ------------------------------------------------------------------------------------------------------------------------------------ 21 M33-OB21- FOS/BL ACQ/ 4.3 MIRROR 1 8.0S 1 ONBOARD ACQ FOR 22 108 BINARY -24 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 22 M33-OB21- FOS/BL ACCUM 1.0 G130H 1150- 1 67M 1 CYCLE 4 108 1606 ------------------------------------------------------------------------------------------------------------------------------------ 23 M33-OB21- FOS/BL ACCUM 1.0 G190H 1573- 1 12M 1 CYCLE 4 108 2330 ------------------------------------------------------------------------------------------------------------------------------------ 24 M33-OB21- FOS/BL ACCUM 1.0 G270H 2222- 1 6M 1 CYCLE 4 108 3301 ------------------------------------------------------------------------------------------------------------------------------------ 24.5 M33-OB21- WFPC2 IMAGE WFALL F160BW CR-SPLIT=NO 1 15M 1 PAR 108-FIELD CYCLE 4 SEQ 24.5-24.7 NO GAP Comments: EXPOSURE LINKED WITH LINE 22.0 ------------------------------------------------------------------------------------------------------------------------------------ 24.6 M33-OB21- WFPC2 IMAGE WFALL F300W 1 6M 1 PAR 108-FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 22.0 ------------------------------------------------------------------------------------------------------------------------------------ 24.7 M33-OB21- WFPC2 IMAGE WFALL F555W 1 5M 1 PAR 108-FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 22.0 ------------------------------------------------------------------------------------------------------------------------------------ 30.5 M31-OB78- WFPC2 IMAGE PC1 F606W 1 350S 1 CYCLE 4 292 ------------------------------------------------------------------------------------------------------------------------------------ 31 M31-OB78- FOS/BL ACQ/ 4.3 MIRROR 1 14.5S 1 ONBOARD ACQ FOR 32 292 BINARY -34 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 32 M31-OB78- FOS/BL ACCUM 1.0 G130H 1150- 1 60M 1 CYCLE 4 292 1606 ------------------------------------------------------------------------------------------------------------------------------------ 33 M31-OB78- FOS/BL ACCUM 1.0 G190H 1573- 1 12M 1 CYCLE 4 292 2330 ------------------------------------------------------------------------------------------------------------------------------------ 34 M31-OB78- FOS/BL ACCUM 1.0 G270H 2222- 1 6M 1 CYCLE 4 292 3301 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5494 [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 34.5 M31-OB78- WFPC2 IMAGE WFALL F160BW CR-SPLIT=NO 1 15M 1 PAR 292-FIELD CYCLE 4 SEQ 34.5-34.7 NO GAP Comments: EXPOSURE LINKED WITH LINE 32.0 ------------------------------------------------------------------------------------------------------------------------------------ 34.6 M31-OB78- WFPC2 IMAGE WFALL F300W 1 6M 1 PAR 292-FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 32.0 ------------------------------------------------------------------------------------------------------------------------------------ 34.7 M31-OB78- WFPC2 IMAGE WFALL F555W 1 5M 1 PAR 292-FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 32.0 ------------------------------------------------------------------------------------------------------------------------------------ 40.5 M33-OB2-4 WFPC2 IMAGE PC1 F606W 1 350S 1 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 41 M33-OB2-4 FOS/BL ACQ/ 4.3 MIRROR 1 15.5S 1 ONBOARD ACQ FOR 42 BINARY -44 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 42 M33-OB2-4 FOS/BL ACCUM 1.0 G130H 1150- 1 65M 1 CYCLE 4 1606 ------------------------------------------------------------------------------------------------------------------------------------ 43 M33-OB2-4 FOS/BL ACCUM 1.0 G190H 1573- 1 12M 1 CYCLE 4 2330 ------------------------------------------------------------------------------------------------------------------------------------ 44 M33-OB2-4 FOS/BL ACCUM 1.0 G270H 2222- 1 6M 1 CYCLE 4 3301 ------------------------------------------------------------------------------------------------------------------------------------ 44.5 M33-OB2-4- WFPC2 IMAGE WFALL F160BW CR-SPLIT=NO 1 15M 1 PAR FIELD CYCLE 4 SEQ 44.5-44.7 NO GAP Comments: EXPOSURE LINKED WITH LINE 42.0 ------------------------------------------------------------------------------------------------------------------------------------ 44.6 M33-OB2-4- WFPC2 IMAGE WFALL F300W 1 6M 1 PAR FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 42.0 ------------------------------------------------------------------------------------------------------------------------------------ 44.7 M33-OB2-4- WFPC2 IMAGE WFALL F555W 1 5M 1 PAR FIELD CYCLE 4 Comments: EXPOSURE LINKED WITH LINE 42.0 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5494 [ 8] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 14.7 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category HOT STARS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category MASSIVE STARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 ONBOARD ACQ FOR 2-4; PAR; CYCLE 4; SEQ 4.5-4.7 NO GAP PAR ONBOARD ACQ FOR 12-14; SEQ 14.5-14.7 NO GAP ONBOARD ACQ FOR 22-24; SEQ 24.5-24.7 NO GAP ONBOARD ACQ FOR 32-34; SEQ 34.5-34.7 NO GAP ONBOARD ACQ FOR 42-44; SEQ 44.5-44.7 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W MIRROR G130H G190H G270H F160BW F300W F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M33-OB6-5 M33-FUV016 M33-OB21-108 M31-OB78-292 M33-OB2-4 M33-OB6-5-FIELD M33-FUV016-FIELD M33-OB21-108-FIELD M31-OB78-292-FIELD M33-OB2-4-FIELD ------------------------------------------------------------------------------------------------------------------------------------