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8/14/2019 V-type asteroids in the middle Main Belt
1/24
arXiv:0707.1012v2
[astro-ph]
31Jul2007
1
2
2.1 < a < 2.5
2.5 < a < 2.8
http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v2http://arxiv.org/abs/0707.1012v28/14/2019 V-type asteroids in the middle Main Belt
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2.54
2.53
D
D 5
D 3
3.5
2.5 < a 2.62
D > 1
http://arxiv.org/abs/astro-ph/06094208/14/2019 V-type asteroids in the middle Main Belt
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2.5 < a < 2.82
0.9
a < 2.5
a > 2.82
D 17
2
D 5
a 2.65
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u,g,r,i,z
ap ep sin Ip
H D
ap ep sin Ip H D
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V = 12.4 V = 12.4
r
V
< 1.5
r V
20h44m53.01s 245712.8 20.9 91.9
14h11m29.86s 240144.8 4.1 169.8
0.7
0.73
0.522 0.938
R 3000 0.90 R 200
0, 75
4
20
0.90 70
V > 11
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0.90
nexp Texp Ttotal
3
2
0.90
tcross
a da/dt
tcross tinst tinst
188207
http://hamilton.dm.unipi.it/cgi-bin/astdys/astibohttp://staff.on.br/froig/vtypes8/14/2019 V-type asteroids in the middle Main Belt
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9500
2.485 ap 2.490
da/dt > 0
= 3J J,
d2rdt2
Yarko
= GM2a2
dadt
vv2
G M a
r, v da/dt
da
dt 2.5 104
1 km
Dcos
D
da/dt < 0
0,
(1.0 0.1) 104
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D 2.5
(1.00.1)103
D 250
97
3
a > 2.5
104
5000
fcross
da/dt 104 fcross1.0 0.1 0.0033 0.0019
10.0 1.0 0.029 0.005
g 2g6+ g5 g g5, g6
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fcross
fcross
da/dt
fcross(D) 0.00751 km
Dcos .
1 km D 5 km
0.5 104
a > 2.5
0.1
D D + dD
age
dNa>2.5(D) = dN0(D) fcol(D) freach(D) fcross(D)
dN0(D)
fcol(D) [D, D + dD] age
dN0(D) fcol(D)
dN(D) freach(D)
age
fcross(D)
age
age 1
age 1.2
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3.5 age 3.5
age
freach
age
10000
vej
vej
v2ej v2esc > 0 and v
2ej v
2cut < 0
vesc = 314
vcut = 600
ap, ep, Ip
cos
1 age
freach a > 2.5
freach(D) age vej freach
vej D 0
cos < 0
freach 0
freach
dN(D)
D 460
25 D 130 8 D 15
D < 8
v2ej
vesc =
q1.64 G 4
3R2
R
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dN(D) n(D)
dN(D) = n(D) dD
> D
N(D) = Dmax
D
n(D) dD.
Dmax
D < 8
N0D
N0
N0
D < 5.5
n0D1
> D
age
Na>2.5(D) =
D
max
D
n(D) freach(D) fcross(D) dD.
Dmax = 8
vej = 200 age
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Na>2.5(D) age
Na>2.5 D 5
D 3
Na>2.5 age 3.5
2.5 < a 2.6
Na>2.5
nV(H) dH nobsV (H) dH
nobsV (H) dH = b(H) nV(H) dH
b(H)
nobsV
b(H) nSDSS(H) dH
nknow(H) dH
nSDSS dH 2.5 < a 2.6
nknow dH
b(H) H 13.0
0.22 H 13.0
nobsV
2.5 < a 2.6
u u 0.35
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g,r,i,z u
2.5 < a 2.6
a > 2.5
Na>2.5
Na>2.5 age = 3.5
10
10
age 3.5
10
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3
2
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A
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a,
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freach
age vej
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Na>2.5 age
vej = 200
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2.5 < a 2.6
nknowH nsdssH
n H = 1
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2.5 < a 2.6
Na>2.5 age = 3.5