Extragalactic Surveys at Arecibo Robert Minchin 2009 AUSAC

Extragalactic Surveys at Arecibo Robert Minchin 2009 AUSAC Meeting

Current Surveys • • • AGES – Arecibo Galaxy Environment Survey ALFALFA – Arecibo Legacy Fast ALFA survey AUDS – ALFA Ultra Deep Survey Zo. A – ALFA Zone of Avoidance survey GASS – Galex-Arecibo-SDSS Survey (LBW) 2009 AUSAC Meeting

Time Allocation From 2008 Skeptical Review: • AUDS – Priority in LST ranges • Zo. A – Commensal with p. ALFA and g. ALFA • ALFALFA : AGES : GASS – 2 : 1 share 2009 AUSAC Meeting

Time Allocated From 1 st March 2008 to 28 th February 2009: 2009 AUSAC Meeting

ALFALFA • Survey papers VI and VII published • Survey papers VIII and IX submitted • Seven other related refereed papers (including refereed conference proceedings) • ALFALFA undergraduate workshop held again at Arecibo in January • ALFALFA blog at http: //alfalfasurvey. wordpress. com 2009 AUSAC Meeting

ALFALFA: Results 21% ALFALFA sky, 7642 galaxies 2009 AUSAC Meeting

ALFALFA: Results 2009 AUSAC Meeting

ALFALFA: Results 2009 AUSAC Meeting

AGES • No cubes completed in the last 12 months. • One quadrant of the Virgo Cluster 1 cube (5 sq. deg. ) taken to full sensitivity. – VC cubes currently being written up as a Ph. D thesis. • Follow-up completed on the NGC 7332 region. • Paper on the full-sensitivity part of the Abell 1367 cube published (Cortese et al. ) 2009 AUSAC Meeting

AGES: Virgo Cluster Results Early-type galaxy VCC 450 2009 AUSAC Meeting

AGES: NGC 7332 Results 2009 AUSAC Meeting

GALEX Arecibo SDSS Survey (GASS) • Targeted HI survey of ∼ 1000 galaxies selected from SDSS and GALEX with 0. 025 < z < 0. 05, 10 < log M★/M☉ < 11. 5 • Designed to probe the ‘green valley’ between old, red, elliptical galaxies and young, blue, spiral galaxies • How do galaxies migrate from the blue cloud to the red sequence? 2009 AUSAC Meeting

GASS: Results • Observations started March 2008 • 128 galaxies from sample already detected by ALFALFA • 99 galaxies observed: 41 detected, 20 upper limits, others still being analyzed • GASS 3505: ‘red and dead’ galaxy with MHI/M★ = 0. 44 2009 AUSAC Meeting

GASS 3505 30’ field No emission lines z = 0. 048 NUV – r = 5. 9 log M★/M☉ = 10. 21 log MHI/M☉ = 9. 85 MHI/M★= 0. 44 SDSS Arecibo SDSS + GALEX, 4’ (∼ 220 kpc) field 2009 AUSAC Meeting

AUDS • • Observations of first field started November ’ 08 Observations of second field will start April ‘ 09 Uses the Mock spectrometers to reach z ∼ 0. 16 Live. Data modified to read data from the Mock spectrometer and to correct for gain change with ZA – This can also benefit Zo. A and AGES 2009 AUSAC Meeting

ALFA Zo. A • Observations taken last fall commensally with I-GALFA and GALFACTS using the WAPPs – Currently being processed in Calgary • Will use the Mock spectrometer for the next I -GALFA run • Currently commissioning commensal observing with p. ALFA and RRL using the Mock spectrometer 2009 AUSAC Meeting

NGC 2903 • Results published in Irwin et al. 2009 • One previously-known companion galaxy (UGC 5086) not detected in HI • Found 1 new companion galaxy, compared to ∼ 230 predicted by ΛCDM models • HI must make up < 1% of the mass of the DM sub-halos • NGC 2903 has a large HI halo (3 optical radii) 2009 AUSAC Meeting

The Year Ahead • Once Zo. A finishes commissioning with the Mock spectrometers, the full complement of e. ALFA surveys will be running • Zo. A data-reduction pipeline will need some work to convert it to Mock data • AGES migration to CIMA 3. 1 in the near future • Updated Live. Data now installed at AO, but needs testing 2009 AUSAC Meeting