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Galaxy Concentrations and Metallicity Relations in the Local Group

This study delves into the galaxy concentrations within 80 h-1 Mpc of the Local Group, exploring the HI content of the LMC, Magellanic Clouds, and Magellanic Stream. It examines Bar-Disk CMDs of various LMC regions and Carina dSph galaxies. The research discusses merging trees, cluster galaxies, HII regions, metallicity-luminosity relation, gas distributions, and abundance ratios, shedding light on the complex interplay between galaxies within the Local Group.

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Galaxy Concentrations and Metallicity Relations in the Local Group

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  1. (l,b) = (35, 25) (l,b) = (125, 25) Galaxy concentrations within 80 h-1 Mpc of Local Group (Hudson et al. 1993)

  2. LMC in HI Kim et al. 1998, ApJ, 503, 674

  3. HI in the Magellanic Clouds and Magellanic Stream (Putman et al 1998, Nature, 394, 752)

  4. Bar Disk CMDs of different regions of the LMC Smecker-Hane et al 2002, ApJ, 566, 239

  5. Bar Disk Smecker-Hane et al 2002, ApJ, 566, 239

  6. Carina dSph. Monelli et al 2003, AJ, 125, 218

  7. Carina dSph Majewski et al 2000, AJ, 119, 760

  8. Majewski et al 2005, AJ, 130, 2677

  9. Example Merging Trees Wechsler et al 2002, ApJ, 568, 52 Cluster Galaxy

  10. Skillman & Kennicutt 2001, AJ, 121, 1461

  11. HII regions with 12+log(O/H)=8.0 van Zee & Haynes 2006

  12. van Zee et al 1998

  13. Metallicity-Luminosity Relation van Zee, Skillman, & Haynes 2006

  14. van Zee & Haynes 2006

  15. Effective yields • Typical effective yields are ¼ of theoretical yields. • Nonetheless, some galaxies appear to behave as closed boxes. van Zee & Haynes 2006

  16. Gas distributions in dIs: DHI/Dopt ~ 2

  17. Ar/O Ne/O Abundance ratios S/O N/O van Zee & Haynes 2006

  18. N/O and color van Zee & Haynes 2006

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