1. Siena College Alfalfa Group Bobby Carroll Kristie Dangerfield Kevin Risolo Danielle Seeley Patti Carroll Rose Finn

2. MKW 10 MKW 10: A Group of Galaxies with a Compact Core- B. A. Williams –A poor cluster of galaxies (a small number of galaxies) (Ironically) Nine galaxies (of m pg < 15.5), with eight spiral members –Five of which form a subsystem at the center of the cluster with observed tidal interactions via their HI profiles Embedded in a larger structure (3 degree diameter) Central velocity = 6040 km/s Standard deviation of the members = 150 km/s Appears to be gravitationally bound

3. Disturbed Galaxies (Needed more hugs?) –NGC 3820 shows definite signs of tidal damage It hydrogen content per luminosity is the lowest of late- type spirals in the group Perhaps by NGC 3819? –NGC 3817 is the least asymmetric of the subsystem But its Gaussian profile is unusual given its inclination of 45° –Still appears as a perfect double peak –Galaxies outside the core appear unaffected by tidal interactions

4. Data Reduction: Finding Sources IDL to access the ALFALFA data –Used Gridview to identify sources both visually and via computer recognition of galaxy locations in the “cube” Went into Galflux to find the half width, flux, and central velocity –Measurements are somewhat arbitrary, but more or less accurate Put into our own catalogue

5. Gridview…… view

6. Sample Source

7. Comparison Compared our catalogue to ALFALFA catalogue –Able to match most every radio source However we did find a number of galaxies we had that the ALFALFA catalogue didn’t have –We found all the galaxies they had »But not all their radio sources –Look into this further, see which ones are missing? »Are they of importance?

8. Comparison II Took the ALFALFA catalogue and compared it to the SDSS –See which radio source galaxies have optical counterparts –And which optical galaxies have no radio counterpart

9. MKW 10 Group N 3820 N 3819 Zw 68-044 Zw 68-046 N 3833 N 3825N 3822 N 3817 U 6647

10. N 3820

11. N 3819

12. Rectangular Search 61 Objects Found RA Dec redshift RA between 173.545 and 177.545 AND Dec between 8.306 and 12.306

13. Morphology Based off the optical images observed Found: –27 elliptical galaxies –16 spiral galaxies –4 barred spiral galaxies –4 lenticular galaxies –10 irregular galaxies

14. Master Catalog Goal: merge radio and optical data into one catalog Step1: -Radio catalog - 163 detections after velocity cut - 77 detections within 4600-7600(km/s) -match Radio to SDSS Spec catalog - 33 galaxies -match Radio to SDSS Phot catalog - 8 galaxies (r<18) Step 2: - no match with SDSS add - 36 galaxies Step 3: -go through SDSS Spec catalog if not match to HI add - 39 galaxies

15. Position

16. Redshift

17. Color-Magnitude Diagram

18. HI Mass

19. Stellar Mass