Deep Multi-Color Imaging in 47 Tuc: Some Early Results
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Deep Multi-Color Imaging Deep Multi-Color Imaging in in 47 Tuc: Some Early Results 47 Tuc: Some Early Results 2MASS ALL SKY IMAGE Disk Bulge Magellanic Clouds 47 Tuc Halo H. Richer (UBC) H. Richer (UBC)
description
Deep Multi-Color Imaging in 47 Tuc: Some Early Results. Halo. Bulge. Disk. 47 Tuc. Magellanic Clouds. 2MASS ALL SKY IMAGE. H. Richer (UBC). Hubble’s 25th Anniversary!!. Cycle 1. Deep Multi-Color Imaging in 47 Tuc: Some Early Results. Halo. Bulge. Disk. 47 Tuc. Magellanic Clouds. - PowerPoint PPT Presentation
Transcript of Deep Multi-Color Imaging in 47 Tuc: Some Early Results
Deep Multi-Color Imaging in Deep Multi-Color Imaging in 47 Tuc: Some Early Results47 Tuc: Some Early Results
Deep Multi-Color Imaging in Deep Multi-Color Imaging in 47 Tuc: Some Early Results47 Tuc: Some Early Results
2MASS ALL SKY IMAGE
DiskBulge
Magellanic Clouds47 Tuc
Halo
H. Richer (UBC)H. Richer (UBC)
Hubble’s 25th Anniversary!!Hubble’s 25th Anniversary!!Hubble’s 25th Anniversary!!Hubble’s 25th Anniversary!!Cycle 1
Deep Multi-Color Imaging in Deep Multi-Color Imaging in 47 Tuc: Some Early Results47 Tuc: Some Early Results
Deep Multi-Color Imaging in Deep Multi-Color Imaging in 47 Tuc: Some Early Results47 Tuc: Some Early Results
2MASS ALL SKY IMAGE
DiskBulge
Magellanic Clouds47 Tuc
Halo
H. Richer (UBC)H. Richer (UBC)
Collaborators Collaborators Collaborators Collaborators
R. Goldsbury, H. Richer, K. Woodley - UBCR. Goldsbury, H. Richer, K. Woodley - UBC J. Anderson, J. Kalirai - STScIJ. Anderson, J. Kalirai - STScI B. Hansen, D. Reitzel, M. Rich - UCLAB. Hansen, D. Reitzel, M. Rich - UCLA A. Dotter - UVicA. Dotter - UVic G. Fahlman, P. Stetson - HIA/NRCG. Fahlman, P. Stetson - HIA/NRC J. Hurley - SwinburneJ. Hurley - Swinburne I. King - UWI. King - UW M. Shara - AMNHM. Shara - AMNH
WD Cooling Model and N6397WD Cooling Model and N6397WD Cooling Model and N6397WD Cooling Model and N6397
Model from Bergeron (2008)Model from Bergeron (2008)
Note:Excellent fit throughmost cooling region
At bright end real WDstoo red or too bright- radii too large or minorcolour transformationproblems?
At faint end real stars turn blue (CIA) faster thanmodels
See poster by Rich et al.
Model Fit to DataModel Fit to Data Model Fit to DataModel Fit to Data Age = 12.21 +/-0.35 Gyr Includes opacity from red wing L (Kowalski 2006) Systematic errors from different
models not included
Hansen et al 2007
Comparison N6397 and M4Luminosity Functions
Galactic Disk is Younger than HaloGalactic Disk is Younger than Halo Galactic Disk is Younger than HaloGalactic Disk is Younger than Halo
Dots = disk
Line = M4 (halo)
M4 LF fainter WDs
M4 older than disk
Disk age 7.5±1.0 Gyr
47 Tuc - an Important Template47 Tuc - an Important Template
47 Tuc - an Important Template47 Tuc - an Important Template
Brown et al. 2009
Disk/Bulge Template Template RGBs Nearby Galaxies
Harris 2010
GO 11677 on 47 Tuc (Cycle 17)GO 11677 on 47 Tuc (Cycle 17)GO 11677 on 47 Tuc (Cycle 17)GO 11677 on 47 Tuc (Cycle 17)Orbits 121
Field 6’ west of centre
ACS F606W F814WArchival F475W F775W F850L
WFC3UVIS: F390W F606WIR: F160W F110W
ScienceAge, binary, variables, planets, H-burninglimit, brown dwarfs,motion & MF SMC
ACS ImagesACS Images ACS ImagesACS Images
Full Field
Center
Edge
ACS CMD WD Cooling SimulationsACS CMD WD Cooling Simulations
ACS CMD WD Cooling SimulationsACS CMD WD Cooling Simulations
WFC3 Images 47 Tuc WFC3 Images 47 Tuc WFC3 Images 47 Tuc WFC3 Images 47 Tuc
F110W F160W
47 Tuc Near IR CMD47 Tuc Near IR CMD 47 Tuc Near IR CMD47 Tuc Near IR CMD
TO
Kink (CIA)
Width (real)
SMC
TO
Kink
Width - RealSMC
47 Tuc Near IR CMD - Ages47 Tuc Near IR CMD - Ages 47 Tuc Near IR CMD - Ages47 Tuc Near IR CMD - AgesAge 2 waysTurnoff11 Gyrsmag or color (Kink-TO)11-12 Gyrs
Models by A. Dotter
47 Tuc Near IR CMD47 Tuc Near IR CMD 47 Tuc Near IR CMD47 Tuc Near IR CMDWidth Lower MS - real, easy to quantify as MS vertical· Models indicate lightelement variations (mainly O)· He can’t explain at fixed [Fe/H]
Cosmology and WDCosmology and WD Cooling Ages Cooling Ages Cosmology and WDCosmology and WD Cooling Ages Cooling Ages
WMAP Model z vs age z and Cosmic Star Formation
Disk 47 Tuc-->
N6397/M4
SFR (M
yr-1 Mpc-3)
1
0.1
0.01 2 4 6Z
Z
T (Gyr)
Disk
N6397/M4
6 8 10 12 14
2
3
4
5
1
0
47 Tuc -->
Spergel et al. 2003 Thompson et al. 2006
Photometric Errors on thePhotometric Errors on theLower Main SequenceLower Main Sequence
Photometric Errors on thePhotometric Errors on theLower Main SequenceLower Main Sequence
