1. Extragalactic Surveys at Arecibo
Robert Minchin
2009 AUSAC Meeting

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

3. Time Allocation From 2008 Skeptical Review:
AUDS – Priority in LST ranges
ZoA – Commensal with pALFA and gALFA
ALFALFA : AGES : GASS – 2 : 1 : 1 share
2009 AUSAC Meeting

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

5. 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
2009 AUSAC Meeting

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

7. ALFALFA: Results
2009 AUSAC Meeting

8. ALFALFA: Results
ALFALFA: alpha= /- 0.05, log Mstar = /- 0.05, Phistar = /
HIPASS: alpha = / /- 0.05, log Mstar = / /- 0.03, Phistar = / /
2009 AUSAC Meeting

9. 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 PhD 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

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

11. AGES: NGC 7332 Results
2009 AUSAC Meeting

12. GALEX Arecibo SDSS Survey (GASS)
Targeted HI survey of ∼1000 galaxies selected from SDSS and GALEX with < 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

13. 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

14. GASS 3505 No emission lines z = 0.048 NUV – r = 5.9 log M★/M☉ = 10.21
30’ field SDSS Arecibo
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 + GALEX, 4’ (∼220 kpc) field
2009 AUSAC Meeting

15. 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
LiveData modified to read data from the Mock spectrometer and to correct for gain change with ZA
This can also benefit ZoA and AGES
2009 AUSAC Meeting

16. ALFA ZoA
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 pALFA and RRL using the Mock spectrometer
2009 AUSAC Meeting

17. 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

18. The Year Ahead
Once ZoA finishes commissioning with the Mock spectrometers, the full complement of eALFA surveys will be running
ZoA data-reduction pipeline will need some work to convert it to Mock data
AGES migration to CIMA 3.1 in the near future
Updated LiveData now installed at AO, but needs testing
2009 AUSAC Meeting