Kinematics of the Sagittarius B2(N-LMH) molecular core

被引：46

作者：

Hollis, JM

Pedelty, JA

Boboltz, DA

Liu, SY

Snyder, LE

Palmer, P

Lovas, FJ

Jewell, PR

机构：

[1] NASA, Goddard Space Flight Ctr, Earth & Space Data Comp Div, Greenbelt, MD 20771 USA

[2] NASA, Goddard Space Flight Ctr, Biospher Sci Branch, Greenbelt, MD 20771 USA

[3] USN Observ, Washington, DC 20392 USA

[4] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan

[5] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[6] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[7] Natl Radio Astron Observ, Green Bank, WV 24944 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 596卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

ISM : abundances; ISM : clouds; ISM : individual (Sagittarius B2(N-LMH)); ISM : molecules; radio lines : ISM;

D O I：

10.1086/379315

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Ethyl cyanide (CH3CH2CN) emission and absorption have been imaged with the Very Large Array toward Sagittarius B2(N-LMH) by means of the 5(15)-4(14) rotational transition at 43.5 GHz (lambda similar to mm). The 1."5 x 1."4 VLA beam shows two principal sources of ethyl cyanide emission: an unresolved source similar to5" north of the LMH that is kinematically consistent with simple expansion, contraction, or small-scale turbulence, and the resolved LMH core source itself that shows kinematics indicating an edge-on rotating disk that extends greater than or equal to3" (similar to0.1 pc) in the approximate east-west direction. A search for the 7(07) - 6(06) rotational transition of the amino acid glycine (NH2CH2COOH) at 43.7 GHz toward Sgr B2(N-LMH) gave negative results.

引用

页码：L235 / L238

页数：4

共 18 条

[1] THE SAGITTARIUS-B2 STAR-FORMING REGION .1. SENSITIVE 1.3 CENTIMETER CONTINUUM OBSERVATIONS [J].