This is for mid-cycle consideration. 27 Sep 172001177951Assigned ID: 1517
----- Attempting Submission 1 (Wed Sep 27 21:14:58 GMT 2017) -----00----- Attempting Submission 1 (Fri Dec 01 16:27:16 GMT 2017) -----
HST Phase II Proposal 15427 (mid_ir.apt.2017_11_29_18_43.aptbackup.2017_11_29_22_20.aptbackup.2017_11_30_20_55.aptbackup) successfully submitted.
Receipt: # 15427-1
----- Attempting Submission 2 (Fri Dec 08 00:06:44 GMT 2017) -----
HST Phase II Proposal 15427 (mid_ir.apt.2017_11_29_18_43.aptbackup.2017_11_29_22_20.aptbackup.2017_11_30_20_55.aptbackup) successfully submitted.
Receipt: # 15427-2
----- Attempting Submission 3 (Mon Dec 11 18:15:37 GMT 2017) -----
HST Phase II Proposal 15427 (mid_ir.apt.2017_11_29_18_43.aptbackup.2017_11_29_22_20.aptbackup.2017_11_30_20_55.aptbackup.2017_12_10_22_46.aptbackup.2017_12_11_17_29.aptbackup) successfully submitted.
Receipt: # 15427-3
----- Attempting Submission 4 (Mon Dec 11 18:19:16 GMT 2017) -----Exploring the Nature of Dark Matter Through Near-IR CMD's of LSB GalaxiesThe coupling between mass and light (i.e., M/L) is critical to understanding the
behavior of dark matter in galaxies, the process of galaxy formation in the LCDM
paradigm and cosmology. Our program to understand the missing mass problem in
rotating galaxies is highly dependent on using a proper M/L to convert near-IR
luminosities into stellar masses (where the baryonic mass of a disk galaxy is primary
HI gas mass plus stellar mass). The recently discovered radial acceleration relation
(RAR) for disk galaxies correlates the baryonic acceleration with the acceleration
due to the total mass (i.e., dark matter). This is the first new scaling relation
related to dark matter in over a decade, but depends critically on the value of M/L
extracted from population models.
This proposal is to measure the near-IR M/L directly in two calibrating galaxies, the
LSB dwarfs F575-3 and F615-1, by obtaining a F110W-F160W CMD. The greatest
uncertainty in our current stellar population models is the contribution from AGB
stars in the low metallicity environment typical to LSB galaxies. These observations
will allow us to map, and count, the AGB population (M_F160W > -5). This will also
allow us a peek into the star formation history of LSB galaxies between 2 and 8 Gyrs
(complimenting H-alpha and UV measurements of the current SFR).
These observations are timely in that we have been awarded Director's Discretionary
time on Spitzer to complete a full range of imaging from GALEX to Spitzer. The
Spitzer data are critical to measuring the near-IR luminosity of
galaxies, but lacks the resolution to provide any information about the stars that
generate it.We are guided but the successful F110W-F160W CMD's from Dalcanton et al. (2009, see
Figure 2 taken directly from their publication). Short exposures of 600 and 900 secs achieved
MF160W = -3 for IC2574 which has a distance modulus of 27.7. Our targets are at a
distance modulus of 30.0; however, we only need to achieve a depth of -5 for our science
goal. Therefore, we need to extend the exposure times by a factor of eight (4,800 secs in
F110W and 7,200 secs in F160W). F110W and F160W are selected for direct comparison
to the ANGST CMD's, over a dozen nearby star-forming dwarfs. As both targets are in
the Arecibo declination range, than its orbital visibility is 54 minutes per orbit. Thus, our
request for 2x4 orbits.
All targets are between 2 to 9 Mpc in distance, which produces a plate scale (on the
high end) of 2.3 pc per pixel which was shown in the cycle 20 galaxies to be sucient to
resolve small star clusters in the galaxies. CMB distances place them at 7 to 9 Mpc, this is
confirmed by their location on various scaling relations. Although in the general direction
of Virgo, it is highly unlikely that they are Virgo dwarfs given their position on luminosity
versus scalelength diagrams.Stellar Populations6falsefalsefalsefalsefalsefalseSUPPORTEDGALAXYLSBYESJ2000J2000GALAXYLSBYESJ2000J2000WFC3/IRImagingNoNoF110WWFC3/IRImagingNoNoF160WWFC3/IRImagingNoNoF110WWFC3/IRImagingNoNoF160W/private/var/folders/p0/w723ghjx5132tmz8gshmz1rw0000gn/T/OPVisit3880650279756585403.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "01"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 10:19:01.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "01"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v02.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "02"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 09:50:47.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v03.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "03"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 09:50:47.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v04.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "04"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 09:50:48.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2881
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/private/var/folders/p0/w723ghjx5132tmz8gshmz1rw0000gn/T/OPVisit6410864315058749367.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "05"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 10:19:02.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v06.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "06"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 10:11:21.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "06"
:obset-id "06"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "06"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v07.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "07"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 10:11:24.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "07"
:obset-id "07"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "07"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2878
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10/Users/js/Desktop/apt/OP-cache/mid_ir-v08.xmlThe scheduling data was generated by CASM 25.2.CASM was run in Phase II mode.(Tic-Visit
:proposal-id 15427
:visit-id "08"
:proposal-version -1
:trans-version "20171009"
:date "11-Dec-2017 10:11:29.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 1
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1079344
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15427
:visit-id "08"
:obset-id "08"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15427
:visit-id "08"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2881
:al-overhead-at-end 0
:internal-dur-at-end 538
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3216
:pcs-gap 0
)true10