GRAVITATIONAL FRAGMENTATION - A COMPARISON WITH W49A

被引：25

作者：

KETO, ER

LATTANZIO, JC

MONAGHAN, JJ

机构：

[1] UNIV ILLINOIS,ASTRON IMAGING LAB,URBANA,IL 61801

[2] UNIV CALIF LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550

[3] MONASH UNIV,DEPT MATH,CLAYTON,VIC 3168,AUSTRALIA

[4] UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 383卷 / 02期

关键词：

HYDRODYNAMICS; INTERSTELLAR; MOLECULES; NEBULAE; H-II REGIONS; INDIVIDUAL; (W49); STARS; FORMATION;

D O I：

10.1086/170821

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the process of gravitational fragmentation of molecular clouds through a comparison of numerical and observational results. We calculate the expected millimeter wave molecular line emission from a model fragmenting cloud generated by a numerical hydrodynamic simulation and compare with observations of HCO+ from the star-forming region W49A. Our investigation suggests that the rotating ring of H II regions, the necklace in W49A, may have formed in the gravitational fragmentation of a flattened rotating molecular cloud.

引用

页码：639 / 644

页数：6

共 19 条

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DICKEL H, 1991, UNPUB APJL

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