The VLA 1.4 GHz Survey of the COSMOS Field (Outlook) Eva Schinnerer (MPIA) Chris Carilli (NRAO),Nick Scoville (Caltech) VLA-COSMOS team, COSMOS collaboration.

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Presentation transcript:

The VLA 1.4 GHz Survey of the COSMOS Field (Outlook) Eva Schinnerer (MPIA) Chris Carilli (NRAO),Nick Scoville (Caltech) VLA-COSMOS team, COSMOS collaboration

VLA-COSMOS Team Eva Schinnerer, MPIA (PI) Chris Carilli, NRAO Vernesa Smolcic, MPIA Nick Scoville, CalTech Frank Bertoldi, RAIUB Andrew Blain, CalTech Marco Bondi, IRA/CNR Paolo Ciliegi, INAF Chris Impey, UArizona Anton Koekemoer, STScI Olivier Le Fevre, LAM C. Megan Urry, Yale Paolo Vettolani, INAF

1.4 GHz imaging of a 1.4 GHz imaging of a 1.4 deg x 1.4 deg 10:00: :12:21 Major themes : (dust-)obscured cosmic star formation history (dust-)obscured cosmic star formation history evolution of the IR-radio correlation evolution of the IR-radio correlation evolution of low luminosity radio AGN to high z evolution of low luminosity radio AGN to high z search for time-variable radio sources search for time-variable radio sources serendipity sources serendipity sources absolute astrometry for COSMOS field absolute astrometry for COSMOS field VLA-COSMOS - Project Outline

NRAO Very Large Array VLA Large Project VLA Large Project A configuration: 10hr pilot project: 246 sources (Schinnerer, Carilli, Scoville et al. 2004) 10hr pilot project: 246 sources (Schinnerer, Carilli, Scoville et al. 2004) ~ 0.8 sqrdeg; rms ~ 25  Jy/beam; ~ 1.8” ~ 0.8 sqrdeg; rms ~ 25  Jy/beam; ~ 1.8” 7 pointings 7 pointings 240hr large project: ~ 4,500 sources (underway) 240hr large project: ~ 4,500 sources (underway) ~ 2 sqrdeg; rms ~ 8-10  Jy/beam; ~ 1.6” ~ 2 sqrdeg; rms ~ 8-10  Jy/beam; ~ 1.6” 23 pointings 23 pointings last observation on Jan 9th, 2005 (40 days total) last observation on Jan 9th, 2005 (40 days total) + 24hr C configuration + 24hr C configuration for missing short spacings for missing short spacings scheduled for May - August 2005 scheduled for May - August 2005 VLA-COSMOS - Observations

COSMOS - Field Size VLA primary beam 1.4 degree

VLA-COSMOS - Pilot Project Schinnerer et al. (2004) % of SF galaxies? Schinnerer et al. (2004) Jackson (2004)

16,000 x 16,000 pixels pixels0.34”/pixel 20/40 days quick-look rms ~ 14  Jy/beam VLA-COSMOS - Large Project 2x 2x 4x 4x 8x 8x 16x

z ~ 1.0 VLA-COSMOS vs. HST morphologies 2” 2” 2” 2” z ~ 0.2 z ~ 1.3 z ~ 0.2

VLA-COSMOS - AGN & Radio Galaxies 1.4 GHz VLA Subaru i’ band XMM contours Radio identified Forming cluster At z ~ 0.3 Smolcic, Schinnerer, Carilli et al. 2005

equatorial field (accessible for e.g. ALMA & EVLA, Keck & VLTs) full wavelength coverage: X-ray --> radio imaging & spectroscopy survey avoids bright sources (in radio) ==> allows for full census of faint radio population ==> allows for full census of faint radio population VLA-COSMOS - Major Features

VLA-COSMOS - Summary Observations: Observations: GHz VLA A-array finished GHz VLA A-array finished GHz VLA C-array spring/summer ‘ GHz VLA C-array spring/summer ‘05 - reduction underway - reduction underway Data Archive: Data Archive: - currently: VLA-COSMOS pilot data - currently: VLA-COSMOS pilot data - A-array data: release early ‘06 - A-array data: release early ‘06 Science: Science: - star formation history - star formation history - evolution of AGN (radio galaxies) - evolution of AGN (radio galaxies) - evolution of radio-IR correlation - evolution of radio-IR correlation

COSMOS: PDS: COSMOS: PDS: # of sources ~ 4,500 ~ 2,000 Resolution 1.7”x1.5” 12”x6” Min. rms ~ 10  Jy ~ 10  Jy Total area 1.96 deg deg 2 Area (<20uJy) 1.6 deg deg 2 VLA-COSMOS vs. Phoenix Deep Survey cosmos PDS Hopkins et al. (2003)