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Optical image of the Milky Way 360 degrees

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COBE near-infrared image of the Milky Way. NGC 891. Magellanic clouds. Fornax dwarf galaxy. Leo I dwarf galaxy. M31 = Andromeda galaxy NGC 205 M32 ... – PowerPoint PPT presentation

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Title: Optical image of the Milky Way 360 degrees


1
Optical image of the Milky Way (360 degrees)
2
Kapteyn (1922)
3
Shapley (1919)
4
COBE near-infrared image of the Milky Way
5
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6
NGC 891
7
Magellanic clouds
8
Fornax dwarf galaxy
9
Leo I dwarf galaxy
10
M31 Andromeda galaxy NGC 205 M32 ( Moon,
for scale)
11
Center of the Milky Way in near-infrared 6
light-months 4
12
Semimajor axis 950 AU Pericenter 120 AU
13
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14
Proper motion (angular speed) of Sgr A
15
Freeman (1970)
16
Rogstad Shostak (1972)
17
Roberts Rots (1973)
18
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19
Van Albada et al. (1985)
20
Kent (1987)
21
Kent (1987)
22
Hipparcos animation of 8X8 degree field over 1500
yr
23
Distance to Hyades cluster 46.3 0.3 pc
(Perryman et al. 1998)
24
J H K
25
Ten nearest stars
Ten brightest stars

26
SDSS galaxy counts Yasuda et al. (2001)
27
Gamma-ray burst counts Fishman Meegan (1995)
28
Reid et al. (2002) red no correction for
binaries green corrected for binaries purple
Wielen et al. (1983)
29
The mass-luminosity relation for main-sequence
stars (Reid et al. 2002)
Sun
30
Mass function in the solar neighborhood dN ?(m)
d log m n(m)dm
dN ? dm/m
31
Initial mass function in the solar
neighborhood dN ?(m) d log m n(m)dm
dN ? dm/m2.35 (Salpeter)
32
Cappellari et al. (2005)
33
(No Transcript)
34
Schlegel, Finkbeiner Davis (1998)
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