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Duilia de Mello (CUA-GSFC) Amy Soto (CUA), Nick Bond (GSFC), Jon P. Gardner (GSFC), Swara Ravindranath (STScI), Claudia Scarlata (UMN), Elysse Voyer (LAM),

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Presentation on theme: "Duilia de Mello (CUA-GSFC) Amy Soto (CUA), Nick Bond (GSFC), Jon P. Gardner (GSFC), Swara Ravindranath (STScI), Claudia Scarlata (UMN), Elysse Voyer (LAM),"— Presentation transcript:

1 Duilia de Mello (CUA-GSFC) Amy Soto (CUA), Nick Bond (GSFC), Jon P. Gardner (GSFC), Swara Ravindranath (STScI), Claudia Scarlata (UMN), Elysse Voyer (LAM), Harry Teplitz (IRSA)

2 Elmegreen et al. 05 UDF i image (lines=0.5) 884 gals with d >0.3 114 chain 178 clump cluster 126 double 97 tadpole 269 spiral 100 elliptical Clump cluster properties z phot = 1.6 - 3 6x10 8 M sun D = 1.8 kpc 5 – 10 clumps per galaxy

3 Simulations: high-z clumps could both dissipate to form disks and coalesce to form bulges (e.g., Bournaud et al 2011; Ceverino et al. 2010, Krumholz et al. 2010; Agertz et al. 2009; Elmegreen 2008) – potential building block of local spirals Simulation Ceverino et al. 10 Bournaud et al. 11 (Faucher-Giguere's Perret's simulations)

4 When UV Clumps become disks? z < 1.5 – restframe UV Instruments: WFPC2 F300W U band (de Mello et al. 2006, Voyer et al. 2009) ACS SBC F150LP (Voyer et al. 2011) BUT more recently WFC3 UVIS (de Mello, Soto, Bond, Teplitz)

5 Voyer et al. (2011, 2013) 230 FUV selected galaxies (0.1 { "@context": "http://schema.org", "@type": "ImageObject", "contentUrl": "http://images.slideplayer.com/5/1517450/slides/slide_5.jpg", "name": "Voyer et al.", "description": "(2011, 2013) 230 FUV selected galaxies (0.1

6 disky n<0.8 mergers 0.82.5 Early-type Ravindranath+ Lotz+

7 uvudf.ipac.caltec.edu

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9 Teplitz et al. 2013 arXiv 0711360 Charge Transfer Efficiency CTE arrows = readout direction CTE degradation Effect is worse for objects far from CCD readout (Solar activity) Epoch 3 – post-flash (unbinned)

10 ACS WFC3F275W WFPC2 F300W phot-z 0.63 0.57 0.77 1.18 270 objects

11 ACS WFC3F275W WFPC2 F300W phot-z 0.63 0.57 0.77 1.18 270 objects

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15 Templates: early- to late-type Coleman et al. Starbursts Kinney et al. ESbc Scd Im Starburst

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19 2 spheroids 3 chains 4 clump clusters 5 irregulars 6 spirals 7 clumpy disks

20 rest-frame 3000 A 1500 A color (1500-3000) 7000A Bond et al. 2013

21 rest-frame 3000 A 1500 A color (1500-3000) 7000A

22 ID5: (4x4) Redshift:0.57 WFPC2 F300W – Voyer et al. (2013) WFC3 F275W ID5 with contour levels 6 – 11σ Redshift:0

23 ID5-Clump Area Comparison 1 2 3 4 5 6 Clump 2 Clump 3 Clump 4 Clump 6 Contours are 6 σ Clump 5 is 4σ Sizes: 0.8 to 1.6 kpc

24 ID17: (2.5x2.5) ID17: (2.5x2.5) with contour level 5σ Redshift:1.18 WFC3 F275WWFPC2 F300W

25 zoomed in clumps Redshift:1.18 Sizes 1.6 kpc 1.3 kpc 0.7 kpc 0.8 kpc

26 F275W z ~ 0.8 = rest frame 1500 AA

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28 Starburst99 1000 – 2500A Why UV?

29 Giant HII regions/Super OB associations Powered by massive young clusters with 100 to 1000 O/WR stars, instead of a few as in regular HII regions (Zinnecker & Yorke ARAA 2007). The Carina Nebula in the Milky Way – 150 pc 30 Doradus in the LMC – 100 pc (radius) NGC 604 in M33 – 200 pc (radius)

30 200 pc radius

31 Giant Spiral: NGC6872 D=65 Mpc size > 100 Kpc Eufrasio et al. (2013)

32 NGC 3079 Petty et al. 2009 GALEX UV images redshifted to z ~ 1.5 and z ~4 resembles LBGs (Gini, M20, Sersic)

33 Careful when using UV to study overall properties of galaxies There are UV clumps without clear signatures of disks Most of UV clumps seem to be in disks at z ~ 1 UV clumps are much larger than HII regions, SSCs, etc Found no signatures of size evolution in UV clumps at z~1 in comparison with higher-z

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