Physics 231: Section 6 Galaxies 1Phys 231, Topic 6: Galaxies.

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Presentation transcript:

Physics 231: Section 6 Galaxies 1Phys 231, Topic 6: Galaxies

M104 – The “Sombrero” Galaxy Phys 231, Topic 6: Galaxies2 Sa Galaxy Very prominent bulge with tightly wound spiral arms

M81 Phys 231, Topic 6: Galaxies3 Sb galaxy. Extended bulge but with relatively prominent arms.

M74 Phys 231, Topic 6: Galaxies4 Sc galaxy Tight galactic bulge. Very extended, blue arms.

Phys 231, Topic 6: Galaxies5

6

7 Stellar mass function in galaxies. From Pannella et al. (2009) Red=“Early Type” Blue=“Late Type”

M102 Phys 231, Topic 6: Galaxies8 A “Lenticular” galaxy

M109 Phys 231, Topic 6: Galaxies9 SBc Barred Spiral

M59 Phys 231, Topic 6: Galaxies10 An E5 galaxy.

Sextans A Phys 231, Topic 6: Galaxies11 Irregular galaxy

Morphological Segregation Phys 231, Topic 6: Galaxies12 From Dominguez et al. (2000). Spirals and Irregulars (S+I) preferentially live in low density environments. Early types (Ellipticals and S0’s) live in high density environments.

Which one is another galaxy, and which one is part of the Milky Way? Phys 231, Topic 6: Galaxies13

The Globular Cluster M13 Phys 231, Topic 6: Galaxies14

Cepheid Variables Phys 231, Topic 6: Galaxies15

Phys 231, Topic 6: Galaxies16

Rotation Curve of NGC891 (in HI) Phys 231, Topic 6: Galaxies17

Herschel/Kapteyn Model of the Milky Way (with the sun near the center) Phys 231, Topic 6: Galaxies18

The Structure of the Milky Way Phys 231, Topic 6: Galaxies19

Phys 231, Topic 6: Galaxies20

Black Hole/Bulge Relation Phys 231, Topic 6: Galaxies21

Phys 231, Topic 6: Galaxies22

Coma Cluster (optical) Phys 231, Topic 6: Galaxies23

Coma Cluster (X-ray) Phys 231, Topic 6: Galaxies24

Hubble’s Original Measurement Phys 231, Topic 6: Galaxies25