Jonathan Monroe Supervisor DrKimVy Tran Texas AampM University IntroductionGoals Data WFC3UVIS F390W F814W 17 10 pointings ACSWFC F606W 17 pointings 10 x 5 mosaic of 4 groups w 170 members spectraconfirmed ID: 540499
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Slide1
HST IMAGING OF GALAXIES IN A SUPER-GROUP AT Z~0.37
Jonathan MonroeSupervisor: Dr.Kim-Vy TranTexas A&M UniversitySlide2
Introduction/Goals
DataWFC3/UVIS: F390W + F814W (17 +10 pointings)
ACS/WFC : F606W (17 pointings)
~10’ x 5’ mosaic of 4 groups w/ ~ 170 members (spectra-confirmed)
WCS + pixel alignment >> SExtractor for color analysisHoping to find “Fireball” or “Jellyfish” deformations
Roediger et al 2014
Owers et al 2012
Kenney et al 2013Slide3
Motivation
Intragroup medium interaction
Ram pressure stripping
Induced morphological deformation
Slide4
Drizzlepac suite (STScI)
AstroDrizzle (Drizzle algorithm)TweakReg
tweakback
Astromatic (Emmanuel Bertin)
SWarpSExtractor
Tools
http://www.astromatic.net/software/sextractor
http://www.stsci.edu/ftp/science/hdf/combination/drizzle.htmlSlide5
WCS alignment >> mosaic
1’
N
ESlide6
Curve of Growth
obj 5
obj 2
obj 1
obj 3
obj 4
Calibrate PSF
Compact, bright objects (stars)
Tight fit
Slide7
Color Magnitude
2”
z = 0.376
2”
z = 0.374
1
2
2
1Slide8
Early type distribution
obj 4 late
obj 20
obj 8
2”
z = 0.375
2”
z = 0.370
RGB = F814W, F606W, F390W
z = 0.372
2”
2”
z = 0.372Slide9
obj 14
Late type distribution
obj 10
2”
z = 0.371
2”
z = 0.369
2”
z = 0.368
obj 12
2”
z = 0.377
RGB = F814W, F606W, F390WSlide10
Conclusions
WCS (+image) aligned ✓Basic data quality analysis
✓
Fireballs? Jellyfish?
✓
z = -
z = 0.368
=
=Slide11
Proof of Concept
2”
2”
2”
z = 0.109
z = 0.370
2”
z = 0.374
z = 0.375
RGB = F814W, F606W, F390WSlide12
Future Study
2”
2”
z = 0.377
2”
z = 0.370
z = 0.376
2”
z = 0.369
2”
0.5”
z = -
z = 0.368
2”
2”
z = 0.368
z = 0.370
RGB = F814W, F606W, F390WSlide13
Curve of Growth
obj 5
obj 2
obj 1
obj 3
obj 4Slide14
UVJ Diagram
Quiescent
Star FormingSlide15
Sersic Indix (n) vs
dproj
Slide16
Color Gradients