New constraints on the delivery of cometary water and nitrogen to Earth from the 15N/14N isotopic ratio

被引：10

作者：

Hutsemekers, Damien ^{[1
]}

Manfroid, Jean ^{[1
]}

Jehin, Emmanuel ^{[1
]}

Arpigny, Claude ^{[1
]}

机构：

[1] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium

来源：

ICARUS | 2009年 / 204卷 / 01期

关键词：

Comets; Earth; Origin; Solar System; TERRESTRIAL PLANETS; ORIGIN; CARBON; D/H; EVOLUTION; ATMOSPHERES; BOMBARDMENT; ABUNDANCES; VOLATILES; DEUTERIUM;

D O I：

10.1016/j.icarus.2009.06.021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New independent constraints on the amount of water delivered to Earth by comets are derived using the N-15/N-14 isotopic ratio, measured to be roughly twice as high in cometary CN and HCN as in the present Earth. Under reasonable assumptions, we find that no more than a few percent of Earth's water can be attributed to comets, in agreement with the constraints derived from D/H. Our results also suggest that a significant part of Earth's atmospheric nitrogen might come from comets. Since the N-15/N-14 isotopic ratio is not different in Oort-cloud and Kuiper-belt comets, our estimates apply to the contribution of both types of objects. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：346 / 348

页数：3

共 40 条

[1]

[Anonymous], METEORITICS PLANETAR

[2]

[Anonymous], 2007, EEARTH

[3] Anomalous nitrogen isotope ratio in comets [J].

Arpigny, C ;

Jehin, E ;

Manfroid, J ;

Hutsemékers, D ;

Schulz, R ;

Stüwe, JA ;

Zucconi, JM ;

Ilyin, I .

SCIENCE, 2003, 301 (5639) :1522-1524

[4] D/H AND O-18/O-16 RATIO IN THE HYDRONIUM ION AND IN NEUTRAL WATER FROM IN-SITU ION MEASUREMENTS IN COMET HALLEY [J].

BALSIGER, H ;

ALTWEGG, K ;

GEISS, J .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1995, 100 (A4) :5827-5834

[5] Isotopic signatures of volatiles in terrestrial planets - Working group report [J].

Becker, RH ;

Clayton, RN ;

Galimov, EM ;

Lammer, H ;

Marty, B ;

Pepin, RO ;

Wieler, R .

SPACE SCIENCE REVIEWS, 2003, 106 (1-4) :377-410

[6] Large excess of heavy nitrogen in both hydrogen cyanide and cyanogen from comet 17P/Holmes [J].

Bockelee-Morvan, D. ;

Biver, N. ;

Jehin, E. ;

Cochran, A. L. ;

Wiesemeyer, H. ;

Manfroid, J. ;

Hutsemekers, D. ;

Arpigny, C. ;

Boissier, J. ;

Cochran, W. ;

Colom, P. ;

Crovisier, J. ;

Milutinovic, N. ;

Moreno, R. ;

Prochaska, J. X. ;

Ramirez, I. ;

Schulz, R. ;

Zucconi, J. -M. .

ASTROPHYSICAL JOURNAL LETTERS, 2008, 679 (01) :L49-L52

[7] Deuterated water in comet C 1996 B2 (Hyakutake) and its implications for the origin of comets [J].

Bockelee-Morvan, D ;

Gautier, D ;

Lis, DC ;

Young, K ;

Keene, J ;

Phillips, T ;

Owen, T ;

Crovisier, J ;

Goldsmith, PF ;

Bergin, EA ;

Despois, D ;

Wootten, A .

ICARUS, 1998, 133 (01) :147-162

[8]

Bockelée-Morvan D, 2004, SPACE SCI S, P391

[9] The end of interstellar chemistry as the origin of nitrogen in comets and meteorites [J].

Charnley, SB ;

Rodgers, SD .

ASTROPHYSICAL JOURNAL, 2002, 569 (02) :L133-L137

[10] The dual origin of the terrestrial atmosphere [J].

Dauphas, N .

ICARUS, 2003, 165 (02) :326-339

← 1 2 3 4 →