PHOTOMETRY OF THE CRAB-NEBULA - VARIABILITY AND THE MASS OF EMITTING GAS

被引：23

作者：

MACALPINE, GM ^{[1
]}

UOMOTO, A ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,HENRY A ROWLAND DEPT PHYS & ASTRON,BALTIMORE,MD 21218

来源：

ASTRONOMICAL JOURNAL | 1991年 / 102卷 / 01期

关键词：

D O I：

10.1086/115868

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measured the luminosity of the Crab Nebula in H-beta, He I-lambda-5876, and the synchrotron continuum. The data suggest that the continuum has remained constant within measurement errors over the last 30 yr. Lower limits for the mass of line emitting gas have been estimated using a method that takes into account spatial variations in the line intensities across the nebula. Depending upon assumptions involving electron densities and helium abundances, the calculated mass ranges between 1 and 2 M..

引用

页码：218 / 223

页数：6

共 24 条

[1]

BOWERS C, 1991, COMMUNICATION

[2]

Cameron A., 1982, ESSAYS NUCL ASTROPHY, P23

[3]

DAVIDSON K, 1974, ASTRON J, V79, P791, DOI 10.1086/111610

[4] SPECTROPHOTOMETRY OF THE CRAB-NEBULA AS A WHOLE [J].

DAVIDSON, K .

ASTRONOMICAL JOURNAL, 1987, 94 (04) :964-971

[5]

DAVIDSON K, 1985, ANNU REV ASTRON ASTR, V23, P119

[6]

EASTMAN RG, 1985, CRAB NEBULA RELATED, P19

[7] THE CRAB-NEBULA .1. SPECTROPHOTOMETRY OF THE FILAMENTS [J].

FESEN, RA ;

KIRSHNER, RP .

ASTROPHYSICAL JOURNAL, 1982, 258 (01) :1-10

[8] INFRARED-SPECTROSCOPY AND IMAGING OF THE CRAB-NEBULA [J].

GRAHAM, JR ;

WRIGHT, GS ;

LONGMORE, AJ .

ASTROPHYSICAL JOURNAL, 1990, 352 (01) :172-183

[9] THE CRAB-NEBULA .2. A PHOTO-IONIZATION MODEL ANALYSIS FOR THE FILAMENTS [J].

HENRY, RBC ;

MACALPINE, GM .

ASTROPHYSICAL JOURNAL, 1982, 258 (01) :11-21

[10] INFRARED AND OPTICAL IMAGERY OF THE CRAB-NEBULA [J].

HESTER, JJ ;

GRAHAM, JR ;

BEICHMAN, CA ;

GAUTIER, TN .

ASTROPHYSICAL JOURNAL, 1990, 357 (02) :539-547

← 1 2 3 →