0
----- Attempting Submission 1 (Fri Jul 15 00:36:17 GMT 2016) -----
Kinematics of a Massive Star Cluster in Formation
We propose to measure the proper motion stellar kinematics of a massive (~10^4Msun), forming proto-star-cluster to test basic theoretical models of formation. This will be the first time such a measurement has been performed. It requires HST-WFC3/IR and is beyond the practical capabilities of ground-based adaptive optics (AO) observations. In contrast to previously-studied massive, young (<10 Myr-old), already-formed clusters, such as NGC3603, Westerlund 1 or the Arches, our target protocluster, G286.21+0.17 (hereafter G286), is still gas-dominated and undergoing active star formation. It has been carefully selected from a complete survey of ~300 dense molecular gas clumps in a 120 sq. deg. region of the Galactic plane. The cluster is also relatively nearby (~2.5 kpc), but not too close that it would span a prohibitively large angular area or suffer from significant saturation problems. Such massive systems are rare and indeed we are unaware of any equivalent, early-stage (i.e., gas dominated) cluster that is closer. Given the depth of its gravitational potential based on its mass and size, the expected proper motions of many independent sub-clusters of stars are detectable at the ~5 sigma level over a 2-year baseline and global contraction of the cluster can be seen if it is happening even at just ~10% of the free-fall rate.
This program is the second epoch of our previous multi-cycle program (ID 13742)
The observations are a mosaic of 3x3 tiles/visits.
Each visit spans two orbits. ~70% of the observing time is in WFC3/IR F167N for the science goal of measuring stellar proper motions. The remaining is in F160W and F110W, for variability studies.
The observational layout is identical as in our previous epoch of observations.
In order to reduce the astrometric error, we imposed the same Orient Angle as in our previous epoch. This is 215 deg for 8 tiles, and 305 for one tile that had to repeated.
Visibility windows for these orient angle are at the beginning and end of the cycle. We have manually imposed a temporal constraint in the phase II to force scheduling the observations at the end of the cycle, as this would improve our proper motion precision due to larger time baseline. Please contact us if this had to be a problem.
RESOLVED STAR FORMATION
12
false
false
false
false
false
0.0
0.0
false
SUPPORTED
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
STELLAR CLUSTER
OB ASSOCIATION
OPEN CLUSTER
STAR FORMING REGION
YOUNG ASSOCIATION
J2000
J2000
WFC3/IR
Imaging
No
No
F167N
WFC3/IR
Imaging
No
No
F110W
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v01.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "01"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:08:55.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "01"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "01"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v02.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "02"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:36.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "02"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v03.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "03"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:40.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "03"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v04.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "04"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:44.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "04"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v05.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "05"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:48.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "05"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v06.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "06"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:52.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "06"
:obset-id "06"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "06"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "06"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v07.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "07"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:23:56.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "07"
:obset-id "07"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "07"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "07"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v08.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "08"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:24:00.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "08"
:obset-id "08"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "08"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "08"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0
C:\SCIENCE\HST proposal 2014\proper_motions\phaseII-epoch2\OP-cache\phaseII-v09.xml
The scheduling data was generated by CASM 24.2.
CASM was run in Phase II mode.
(Tic-Visit
:proposal-id 14680
:visit-id "09"
:proposal-version -1
:trans-version "20160601"
:date "14-Jul-2016 20:24:03.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 4143424
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 14680
:visit-id "09"
:obset-id "09"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 14680
:visit-id "09"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 3091
:al-overhead-at-end 0
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 14680
:visit-id "09"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3193
:al-overhead-at-end 0
:internal-dur-at-end 557
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3456
:pcs-gap 0
)
true
2
0