Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (11) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The structure and motion of the Crab nebula jet
Authors:
Fesen, Robert A.; Staker, Bryan
Affiliation:
AA(Dartmouth College, Hanover, NH), AB(Brigham Young Univ., Provo, UT)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 263, no. 1, p. 69-74. (MNRAS Homepage)
Publication Date:
07/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CRAB NEBULA, PLASMA JETS, STELLAR MASS EJECTION, SUPERNOVA REMNANTS, ASTRONOMICAL MODELS, ASTRONOMICAL SPECTROSCOPY, STELLAR EVOLUTION, STELLAR MOTIONS
Bibliographic Code:
1993MNRAS.263...69F

Abstract

A high-resolution forbidden O III 5007 A image of the northern 'jet' feature of the Crab nebula shows it to be a delicate structure containing numerous knots and filaments. Comparison of this image with one taken five years earlier yields proper motions of 0.19-0.34 arcsec/yr for 14 features located in the northern half of the jet. Adopting 0.26 arcsec/yr as a representative value, the motion of the jet corresponds to a transverse velocity of 2500 x (d/2 kpc) km/s. This is consistent with an age and postsupernova acceleration comparable to the rest of the nebula, suggesting an origin coeval with the AD 1054 supernova event. The measurements also suggest a radial-like expansion away from the center of the remnant, despite the highly nonradial appearance of the jet. Radial motions imply that the nonradial structure of the jet is not kinematically driven by peculiar filament motions along the northern periphery of the remnant. Slit spectroscopy along the major axis shows no radial velocity decrease near the northern end of the jet to indicate any filament closure. Possible origins of the jet are briefly discussed.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints