SBb and Sb Galaxies

1
SBb and Sb Galaxies

• A Study of M81 and M109
• By Emily, Hillary, Karen, and Drew

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Spiral Galaxies

• Collection of spinning gas and dust around a
  central nucleus
• Two kinds of spiral galaxies Spirals (S) and
  Barred Spirals (SB)
• Three subsets for each type
• Barred Spirals SBa, SBb, SBc
• Regular Spirals Sa, Sb, and Sc

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Purpose of the Project

• Compare the locations of the prominent blue and
  red stars in a spiral and a barred spiral galaxy

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What We Did

• Used the 12 and its filters (luminous, blue,
  red, and green)
• Imaged M81 and M109
• Used blue and red filters for comparison
• Used all filters to create a combined color image

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M109
Blue Filter
Red Filter
6
M81
Red Filter
Blue Filter
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Conclusions

• Relatively identical star locations
• SBb (M109) had more red stars in the spiral arms
  than the Sb (M81)

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M109 Color
9
M81 Color
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Other Images Taken With Extra Time
M17 Omega Nebula
M57 Ring Nebula