Removed a few typos and added the COS aperture to Fig.1 Assigned ID: 55 ----- Attempting Submission 1 (Tue Feb 23 12:47:52 GMT 2010) ----- HST Phase I Proposal 55 (C18 IRLum.apt) successfully submitted. ----- Attempting Submission 2 (Wed Feb 24 13:48:21 GMT 2010) ----- - changed to Mirror B in visit 2 - slightly revised the coordinates in visit 3 ----- Attempting Submission 1 (Thu Jul 08 14:11:16 GMT 2010) ----- HST Phase II Proposal 12173 (C18 IRLum Phase II.apt) successfully submitted. ----- Attempting Submission 2 (Thu Jul 08 14:11:37 GMT 2010) ----- ----- Attempting Submission 3 (Mon Apr 11 17:46:25 GMT 2011) ----- the positions are ok Feedback between Stars, ISM and IGM in IR-Luminous Galaxies We propose COS G130M mode spectroscopy between 1150 and 1450 Angstroms of four ultraviolet-bright, infrared-luminous starburst galaxies. Our selected sightlines towards the starburst nuclei probe the physical conditions in the starburst-driven galactic superwinds. The spectral resolution of about 20 km/s is an order of magnitude improvement over existing HST data and allows a study of the complex gas conditions. Previous observations at lower resolution found strong, blueshifted interstellar absorption lines whose strength and velocity indicate signficant mass outflow. High-resolution data are required to verify or reject suggestions of velocity dispersion and/or covering factor variations being the prime mechanism responsible for the line properties. The proposed observations will constrain the energetics of the cool and warm gas and help determine if the outflow material can escape from the galaxies. Several weak lines will be measured at sufficiently high S/N to derive the column densities and abundances in the dominant ions entrained within the outflow. In combination with the kinematic properties we will estimate the mechanical energy and mass outflow rate and perform a comparison with the star-formation rate. We will investigate whether the outflows quench star formation and ultimately regulate the starburst as has been suggested for high-redshift galaxies. The chosen sightlines will allow us to generalize our results to the overall properties of galaxy outflows, to search for implications for similar galaxies at cosmological distances, and to add to our understanding of QSO absorption lines. Outflows may be the long-sought mechanism for distributing the products of stellar nucleosynthesis over large volumes in the universe.
We will use COS and the G130M grating to collect R = 20,000 spectra in the wavelength range 1150 – 1450 Å of the central starburst regions of four IR-luminous galaxies. HST archival images in the UV and/or extreme blue as well as UV spectroscopy are available. All galaxies, except IRAS 16104+5235 were observed through small (< 3 arcsec) apertures; therefore accurate flux information for estimating exposure times and evaluating target acquisition strategies are available. IRAS 16104+5235 was observed with HUT; these data and the available UV imaging provide the necessary information as well. The proposed COS spectra will be taken through the circular 2.5 arcsec aperture centered on the nucleus. We will perform a standard target acquisition, with a NUV imaging time of about 20s. The acquisition image and all the overheads will require about 500 seconds for each visit. Accounting also for the guide star acquisition, we expect to have >2400 seconds available for science exposures. Using the HST archival information we derived the expected 1300 Å fluxes in the COS aperture. From our previous experience with HST UV spectra, we require S/N = 15 – 20 in the continuum. This S/N, together with a resolving power of R = 20,000 will allow us to measure weak, unsaturated lines with equivalent widths < 0.3 Å. Equally important, we will be able to observe weak photospheric absorption lines, which will support the determination of the galaxy restframe velocity zero point. We can reach this S/N in 1 – 4 orbits for each of the target galaxies QUASAR ABSORPTION LINES AND IGM 12 false 0.0 0.0 false false false false SUPPORTED GALAXY STARBURST J2000 08 38 23.1800 +65 07 15.20 J2000 F(1300)=1e-14 GALAXY STARBURST NGC3256 J2000 10 27 51.2700 -43 54 13.80 J2000 F(1300)=2e-15 GALAXY STARBURST NGC6090 J2000 16 11 40.7000 +52 27 24.00 J2000 F(1300)=4e-15 GALAXY STARBURST NGC7552 J2000 23 16 10.7700 -42 35 5.40 J2000 F(1300)=5e-15 COS/FUV Spectroscopic No No G130M 1309 COS/FUV Spectroscopic No No G130M 1309 COS/FUV Spectroscopic No No G130M 1309 COS/FUV Spectroscopic No No G130M 1309 C:\Users\claus\AppData\Local\Temp\OPVisit3846274818746908629.xml The scheduling data was generated by CASM 19.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12173 :visit-id "01" :proposal-version -1 :trans-version "20100902" :date "11-Apr-2011 13:44:29.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 278400 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12173 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12173 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3227 :al-overhead-at-end 0 :internal-dur-at-end 400 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3599 :pcs-gap 0 ) true 1 0 C:\Users\claus\AppData\Local\Temp\OPVisit8596145725671230182.xml The scheduling data was generated by CASM 19.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12173 :visit-id "02" :proposal-version -1 :trans-version "20100902" :date "11-Apr-2011 13:44:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 652384 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12173 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12173 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2978 :al-overhead-at-end 0 :internal-dur-at-end 97 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 126 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 126 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 438 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) true 4 0 C:\Users\claus\AppData\Local\Temp\OPVisit8248685987591163620.xml The scheduling data was generated by CASM 19.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12173 :visit-id "03" :proposal-version -1 :trans-version "20100902" :date "11-Apr-2011 13:44:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 487200 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12173 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12173 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3073 :al-overhead-at-end 0 :internal-dur-at-end 97 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3445 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3223 :al-overhead-at-end 0 :internal-dur-at-end 40 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3445 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3223 :al-overhead-at-end 0 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3445 :pcs-gap 0 ) true 3 0 C:\Users\claus\AppData\Local\Temp\OPVisit4677321144660790383.xml The scheduling data was generated by CASM 19.0. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12173 :visit-id "04" :proposal-version -1 :trans-version "20100902" :date "11-Apr-2011 13:44:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 321888 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12173 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12173 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2969 :al-overhead-at-end 0 :internal-dur-at-end 97 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12173 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 438 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) true 2 0