-
1
-
-
0002903279
-
-
V. Mannings, S. S. Russell, A. P. Boss, Eds. (Univ. of Arizona Press, Tucson, AZ)
-
J. N. Goswami, H. A. T. Vanhala, in Protostars and Planets IV, V. Mannings, S. S. Russell, A. P. Boss, Eds. (Univ. of Arizona Press, Tucson, AZ, 2000), pp. 965-996.
-
(2000)
Protostars and Planets IV
, pp. 965-996
-
-
Goswami, J.N.1
Vanhala, H.A.T.2
-
4
-
-
0030846314
-
-
F. H. Shu, H. Shang, A. E. Glassgold, T. Lee, Science 277, 1475 (1997).
-
(1997)
Science
, vol.277
, pp. 1475
-
-
Shu, F.H.1
Shang, H.2
Glassgold, A.E.3
Lee, T.4
-
5
-
-
4243751477
-
-
T. Lee, F. H. Shu, H. Shang, A. E. Glassgold, K. E. Rehm, Astrophys. J. 506, B9B (1998).
-
(1998)
Astrophys. J.
, vol.506
-
-
Lee, T.1
Shu, F.H.2
Shang, H.3
Glassgold, A.E.4
Rehm, K.E.5
-
6
-
-
2242447282
-
-
note
-
The light elements Li, Be, and B are readily destroyed in high-temperature nuclear burning in stellar interiors. They are considered to be products of interactions of energetic particles in interstellar space with ambient interstellar matter [see, e.g. (7)].
-
-
-
-
9
-
-
0035916478
-
-
M. Gounelle, F. H. Shu, H. Chang, A. E. Glassgold, K. E. Rehm, T. Lee, Astrophys. J. 548, 1051 (2001).
-
(2001)
Astrophys. J.
, vol.548
, pp. 1051
-
-
Gounelle, M.1
Shu, F.H.2
Chang, H.3
Glassgold, A.E.4
Rehm, K.E.5
Lee, T.6
-
10
-
-
2242488441
-
-
note
-
It is possible to estimate the time between the ejection of short-lived radioactivities from a stellar source (such as a supernova or a thermally pulsing asymptotic giant branch star or a Wolf-Rayet star) and the formation of some of the early solar system objects in which their records are found by considering stellar nucleosynthesis yields and a suitable model for transport into and subsequent mixing of the radioactivities with the protosolar cloud [e.g. (1)]. If a homogeneous distribution of the short-lived nuclides in the solar nebula is assumed, they may be used as relative chronometers for dating solar system events and processes.
-
-
-
-
14
-
-
2242434620
-
-
note
-
standard) -1) × 1000%, where j represents the reference isotope. A suitable standard with normal isotopic composition is used to infer the magnitude of the anomaly.
-
-
-
-
15
-
-
0032484892
-
-
S. Sahijpal, J. N. Goswami, A. M. Davis, L. Grossman, R. S. Lewis, Nature 391, 559 (1998).
-
(1998)
Nature
, vol.391
, pp. 559
-
-
Sahijpal, S.1
Goswami, J.N.2
Davis, A.M.3
Grossman, L.4
Lewis, R.S.5
-
17
-
-
0029775401
-
-
G. Srinivasan, S. Sahijpal, A. A. Ulyanov, J. N. Goswami, Geochim. Cosmochim. Acta 60, 1823 (1996).
-
(1996)
Geochim. Cosmochim. Acta
, vol.60
, pp. 1823
-
-
Srinivasan, G.1
Sahijpal, S.2
Ulyanov, A.A.3
Goswami, J.N.4
-
18
-
-
2242426451
-
-
note
-
Samples were analyzed with a Cameca ims-4f ion microprobe at the Physical Research Laboratory, Ahmedabad. Techniques are described in supplemental data on Science Online.
-
-
-
-
19
-
-
2242481313
-
-
note
-
11B = 0.2473) in them; no such assumption was made while analyzing the combined data set (Fig. 1).
-
-
-
-
20
-
-
2242429095
-
-
J. N. Goswami, K. D. McKeegan, K. K. Marhas, N. Sinha, A. M. Davis, Lunar Planet. Sci. XXXII, 1576 (2001).
-
(2001)
Lunar Planet. Sci.
, vol.32
, pp. 1576
-
-
Goswami, J.N.1
McKeegan, K.D.2
Marhas, K.K.3
Sinha, N.4
Davis, A.M.5
-
21
-
-
2242458760
-
-
thesis, Devi Ahilya University, Indore, India
-
K. K. Marhas, thesis, Devi Ahilya University, Indore, India (2001).
-
(2001)
-
-
Marhas, K.K.1
-
22
-
-
2242456968
-
-
A. Hashimoto, R. W. Hinton, A. M. Davis, L. Grossman, T. K. Mayeda, R. N. Clayton, Lunar Planet. Sci. XVII, 317 (1986).
-
(1986)
Lunar Planet. Sci.
, vol.17
, pp. 317
-
-
Hashimoto, A.1
Hinton, R.W.2
Davis, A.M.3
Grossman, L.4
Mayeda, T.K.5
Clayton, R.N.6
-
23
-
-
2242459707
-
-
note
-
-5).
-
-
-
-
25
-
-
2242449051
-
-
note
-
10Be, and therefore this possibility cannot be ruled out. However there is neither any rigorous published work nor any general consensus on this issue at present.
-
-
-
-
27
-
-
2242489314
-
-
note
-
-β (where n is the number and r is the radius of the targets), with β values of 3 to 5. We ignore possible shielding of the targets by nebular gas and assume free access of SEPs up to the asteroidal zone. Appropriate reaction cross sections for relevant reactions have been used in these calculations (38, 39).
-
-
-
-
32
-
-
2242441042
-
-
note
-
26Al.
-
-
-
-
34
-
-
0001934333
-
-
M. W. Caffee, C. M. Hohenberg, T. D. Swindle, J. N. Goswami, Astrophys. J. 313, L31 (1987).
-
(1987)
Astrophys. J.
, vol.313
-
-
Caffee, M.W.1
Hohenberg, C.M.2
Swindle, T.D.3
Goswami, J.N.4
-
35
-
-
2242484863
-
-
note
-
27Al ratios cannot be explained in this scenario.
-
-
-
-
39
-
-
0001759302
-
-
J. N. Sisterson, K. Kim, M. W. Caffee, M. Imamura, R. C. Reedy, Lunar Planet. Sci. XXVIII, 1329 (1997).
-
(1997)
Lunar Planet. Sci.
, vol.28
, pp. 1329
-
-
Sisterson, J.N.1
Kim, K.2
Caffee, M.W.3
Imamura, M.4
Reedy, R.C.5
-
40
-
-
2242447281
-
-
note
-
We thank E. Olsen for sample SH-7, R. S. Lewis for the acid-resistant residue of Murchison, and M. Chaussidon for the GB4 standard (18). Supported by the Department of Space, India (K.K.M., J.N.G.) and by NASA grant NAGS-9510 (A.M.D.).
-
-
-
|