Spitzer Survey of Virgo (SPITSOV) O. Ivy Wong 1 17th Virgo - PowerPoint PPT Presentation

Spitzer Survey of Virgo (SPITSOV) O. Ivy Wong 1 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

Papers in progress I. SPITSOV atlas ‣ global properties of the IRAC & MIPS observations II.Dusty PAH outflows and upturns ‣ investigates the PAH outflows and upturns observed within the SPITSOV survey 2 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

THE SPITSOV SAMPLE 43 VIRGO GALAXIES 3 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

4 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

GALAXIES WITH DISTINCTIVE SIGNATURES 5 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

GALAXIES WITH TRUNCATED STAR FORMATION 6 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

Bernd & Marion’s CO maps are v. relevant here WHAT HAPPENED HERE ??? 7 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

MIPS DATA (I) Spatial resolution: @ 24 µm ~ 6˝, @ 70 µm ~ 18˝, @ 160 µm ~ 38˝ E.g. A nice face-on galaxy, NGC 4548 : 24 µm contours @ 2%, 5%, 10%, 50% & 90% of peak intensity 8 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

NGC 4548 -- CONTINUED ... 70 µm contours @ 5%, 10%, 50% & 90% of peak intensity 9 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

NGC 4548 -- CONTINUED ... 160 µm contours @ 5%, 10%, 50% & 90% of peak intensity 10 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

MIPS DATA (II) Spatial resolution: @ 24 µm ~ 6˝, @ 70 µm ~ 18˝, @ 160 µm ~ 38˝ E.g. An edge-on galaxy, NGC 4522 : 24 µm contours @ 2%, 5%, 10%, 50% & 90% of peak intensity 11 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

NGC 4522 -- CONTINUED ... 70 µm contours @ 5%, 10%, 50% & 90% of peak intensity 12 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

NGC 4522 -- CONTINUED ... 160 µm contours @ 5%, 10%, 50% & 90% of peak intensity 13 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

SOME IRAC RESULTS (I) 14 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

SOME IRAC RESULTS (II) 15 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

INCLINATION EFFECTS? ✗ 16 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

SOME MIPS RESULTS (I) ‣ simple result: lower SF ==> lower dust T 17 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

SOME MIPS RESULTS (II) 18 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

NORMALISED S 24 & S PAH VS. FIR COLOUR 19 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

24 μ m SURFACE DENSITY VS COLOUR 20 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

24 μ m/3.6 μ m as a function of Concentration ❇ ANAEMIC HI-RICH (HI DEF < -0.1) NORMAL SF MESSY/IN A PAIR ★ TRUNCATED W ONGOING PRESSURE • TRUNCATED W/O ONGOING PRESSURE + TRUNCATED ANAEMIC ◦ TRUNCATED COMPACT Anaemic galaxies have lower 24 μ m/3.6 μ m in the inner 30% relative to the outer 70% due to a higher density of older stellar population in the middle HI-rich galaxies have higher 24 μ m/3.6 μ m also good to compare this to David’s sample 15th Virgo Mini-meeting @ Columbia Univ. (16 July 2009) 21

Spitzer Dusty Outflows 22 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

PAH outflows & upturns Aim: to present SPITSOV galaxies which show dusty upturns and nuclear dust outflows Right: Galaxies with PAH upturns away from the main disk 16th Virgo Mini-meeting @ Yale Univ. (24 November 2009) 23

16th Virgo Mini-meeting @ Yale Univ. (24 November 2009) 24

Galaxies with nuclear PAH outflows Near-future work: ‣ measure quantitatively the significance of these outflows ‣ investigate why PAH outflows exist for these galaxies (.. especially NGC 4694) 16th Virgo Mini-meeting @ Yale Univ. (24 November 2009) 25

Summary Global IR colours of SPITSOV are similar to the IR colours of star- forming galaxies irrespective of environment or spatial distribution G with weaker 70 μ m span a larger range of FIR colours -- smaller galaxies are more dependent on recent star formation history Mid- and far-infrared colours do not correlate with inclination Proxy for SSFR (S 24 /S 3.6 ) shows some correlation to 70-160 μ m colour (hotter global T --> more likely to be able to heat dust to T ≥ 100K) No strong correlations are found for PAHS because there are destroyed in strong radiation fields and are dependent on metallicity G with anaemic SF appear to have colder global dust T 26 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

27 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

28 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

29 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)

30 17th Virgo Mini-meeting @ Strasbourg Observatory (19 June 2010)