1

Radio Astronomy Kraus

An Introduction to Radio Astronomy Burke & Graham-Smith

Radio Images of Planets de Pater, ARAA, 28, 347 (1990)

2

Kraus Radio Astronomy

3

=

==

b

Sb

S

Tc

k

dTc

kdBS

2

2

2

2

2

2

0.00160.25180

3.5x104900300

58600

0.75200

920160

7x1059006000

[Jy] @ 8 GHz

[arcsec]

[K]

4

6000 K

0.3 GHz

Kraus Radio Astronomy

5

6

17GHz

7

Tb6000 K 106 K

Zirin et al. (1991)

106

K

8

log

P

log

2 P

1= xconstant

0 =P

106 K

6000 K

< 1GHzTb=10

4-6 K

> 10GHzTb=6000-10

4 K

9

106 K

6000 K

< 1GHz

> 10GHz

10

106 K

11

1992/11/2104 K

109 K

12

MH

z

1000kms-1

Kraus Radio Astronomy

13

F

Tl

F= l T

r

R

r

T

Ll

2

24

rR

LF

=

424 Trl =

( ) 41

2

1

4

1

16 LRT=

[K] 11

3004

1

2

1

=

OL

L

AU

RT

14

1cmcm

1c

m

cm

k < 0.1 [Wm-1K-1] cf. k ~ 100

15

Baars (1973)

16

Baars (1973)

17

167179.4152.4

137149.3133.0

134.1

126.9

60

206206.8194.3

294367.1446.0

150 GHz90.0 GHz

31.4 GHz

Ulich (1981)

18

de Pater (1991)

19

de Pater (1991)

20

1.

2.

3.

< 3cm

Kraus Radio Astronomy

21

de Pater (1990)

2 cm = 15 GHz

22

5 GHz

1.46 GHz

333 MHz

de Pater (1991)

23

1.4 x 10-3 T

10 MeV

( )

=

c

Fcm

BqP

0

3

8

3

2

4

3

m

eBc =

= 1GHz ~ 10 MeV

NRAO homepage

24

10-3 sec

106 Jy

25

30 MHz

Kraus Radio Astronomy

26

Kraus Radio Astronomy

27

Kraus Radio Astronomy

28

Kraus Radio Astronomy