THE H-2 LINE-PROFILES IN THE CYGNUS LOOP - EVIDENCE FOR J-SHOCKS WITH MAGNETIC PRECURSORS

被引：8
作者：
GRAHAM, JR [1 ]
WRIGHT, GS [1 ]
GEBALLE, TR [1 ]
机构：
[1] JOINT ASTRON CTR,HILO,HI 96720
来源：
ASTROPHYSICAL JOURNAL | 1991年 / 372卷 / 01期
关键词：
D O I：
10.1086/186014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have obtained infrared Fabry-Perot spectra at almost-equal-to 25 km s-1 resolution of the H-2 line emission associated with the fast shocks to the NE of the Cygnus Loop supernova remnant. Profiles of the 1-0 S(1) H-2 emission associated with both the optically bright radiative shocks and the faint nonradiative shocks have been observed. The profiles are resolved and have deconvolved widths of almost-equal-to 20 km s-1. This result favors excitation of the H-2 emission in a magnetic precursor over excitation by a radiative precursor. Shocks with precursors may play an important role in Herbig-Haro objects, and in star-forming cloud cores.
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页码：L21 / L24
页数：4
相关论文
共 24 条
[1]   RATIOS OF MOLECULAR-HYDROGEN LINE-INTENSITIES IN SHOCKED GAS - EVIDENCE FOR COOLING ZONES [J].
BRAND, PWJL ;
MOORHOUSE, A ;
BURTON, MG ;
GEBALLE, TR ;
BIRD, M ;
WADE, R .
ASTROPHYSICAL JOURNAL, 1988, 334 (02) :L103-L106
[2]   INTERSTELLAR ABSORPTION OF COSMIC X-RAYS [J].
BROWN, RL ;
GOULD, RJ .
PHYSICAL REVIEW D, 1970, 1 (08) :2252-&
[3]   HIGH SPECTRAL RESOLUTION OBSERVATIONS OF FLUORESCENT MOLECULAR-HYDROGEN IN MOLECULAR CLOUDS [J].
BURTON, MG ;
GEBALLE, TR ;
BRAND, PWJL ;
MOORHOUSE, A .
ASTROPHYSICAL JOURNAL, 1990, 352 (02) :625-629
[4]   MOLECULAR SHOCK-WAVES IN THE BN-KL REGION OF ORION [J].
CHERNOFF, DF ;
HOLLENBACH, DJ ;
MCKEE, CF .
ASTROPHYSICAL JOURNAL, 1982, 259 (02) :L97-L101
[5]  
CHEVALIER RA, 1980, ASTROPHYS LETT COMM, V21, P57
[6]   OBSERVATIONS OF THE 63 MICRON [O I] LINE IN HERBIG-HARO OBJECTS [J].
COHEN, M ;
HOLLENBACH, DJ ;
HAAS, MR ;
ERICKSON, EF .
ASTROPHYSICAL JOURNAL, 1988, 329 (02) :863-873
[7]   NEUTRAL HYDROGEN ASSOCIATED WITH SUPERNOVA-REMNANTS .1. CYGNUS LOOP [J].
DENOYER, LK .
ASTROPHYSICAL JOURNAL, 1975, 196 (02) :479-487
[8]   A MODEL FOR THE INTENSE MOLECULAR LINE EMISSION FROM OMC-1 [J].
DRAINE, BT ;
ROBERGE, WG .
ASTROPHYSICAL JOURNAL, 1982, 259 (02) :L91-L96
[9]   INTER-STELLAR SHOCK-WAVES WITH MAGNETIC PRECURSORS [J].
DRAINE, BT .
ASTROPHYSICAL JOURNAL, 1980, 241 (03) :1021-1038
[10]   COMPARISON OF 2.1 AND 3.8 MICRON LINE-PROFILES OF SHOCKED H-2 IN THE ORION MOLECULAR CLOUD [J].
GEBALLE, TR ;
PERSSON, SE ;
SIMON, T ;
LONSDALE, CJ ;
MCGREGOR, PJ .
ASTROPHYSICAL JOURNAL, 1986, 302 (02) :693-700
123