The activity and size of the nucleus of comet Hale-Bopp (C/1995 01)

被引：97

作者：

Weaver, HA

Feldman, PD

AHearn, MF

Arpigny, C

Brandt, JC

Festou, MC

Haken, M

McPhate, JB

Stern, SA

Tozzi, GP

机构：

[1] UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742

[2] UNIV LIEGE,INST ASTROPHYS,B-4000 LIEGE,BELGIUM

[3] UNIV COLORADO,ATMOSPHER & SPACE PHYS LAB,BOULDER,CO 80309

[4] OBSERV MIDI PYRENEES,F-31400 TOULOUSE,FRANCE

[5] SW RES INST,DEPT SPACE SCI,BOULDER EXTENS OFF,BOULDER,CO 80302

[6] OSSERV ASTROFIS ARCETRI,I-50125 FLORENCE,ITALY

来源：

SCIENCE | 1997年 / 275卷 / 5308期

关键词：

D O I：

10.1126/science.275.5308.1900

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Analysis of Hubble Space Telescope (HST) images of comet Hale-Bopp (C/1995 O1) suggests that the effective diameter of the nucleus is between 27 to 42 kilometers, which is at least three times larger than that of comet P/Halley, The International Ultraviolet Explorer and HST spectra showed emissions from OH (a tracer of H2O) and CS (a tracer of CS2) starting in April 1996, and from the CO Cameron system (which primarily traces CO2) starting in June 1996. The variation of the H2O production rate with heliocentric distance was consistent with sublimation of an icy body near its subsolar point. The heliocentric variation in the production rates of CS2 and dust was different from that of H2O, which implies that H2O sublimation did not control the CS2 or dust production during these observations.

引用

页码：1900 / 1904

页数：5

共 27 条

[21] COLLISIONAL QUENCHING OF COMETARY EMISSION IN THE 18 CENTIMETER OH TRANSITIONS [J].