Characteristics of the H2CO maser emission in Sgr B2
نویسندگان
چکیده
منابع مشابه
Polarization of X–ray emission from the Sgr B2 cloud
The Sgr B2 giant molecular cloud is claimed to be an ”X–ray reflection nebula” – the reprocessing site of a powerful flare of the Sgr A* source, occurred few hundred years ago. The shape of the X–ray spectrum and the strength of the iron fluorescent line support this hypothesis. We argue that the most clean test of the origin of X–rays from Sgr B2 would be a detection of polarized emission from...
متن کاملar X iv : 0 80 1 . 03 48 v 1 [ as tr o - ph ] 2 J an 2 00 8 Infall and Outflow of Molecular Gas in Sgr B 2
Observations of two H2CO (303−202 and 321−220) lines and continuum emission at 1.3 mm towards Sgr B2(N) and Sgr B2(M) have been carried out with the SMA. The mosaic maps of Sgr B2(N) and Sgr B2(M) in both continuum and lines show a complex distribution of dust and molecular gas in both clumps and filaments surrounding the compact star formation cores. We have observed a decelerating outflow ori...
متن کاملMaser emission in planetary nebulae
Stars at the top of the asymptotic giant branch (AGB) can exhibit maser emission from molecules like SiO, H2O and OH. These masers appear in general stratified in the envelope, with the SiO masers close to the central star and the OH masers farther out in the envelope. As the star evolves to the planetary nebula (PN) phase, mass-loss stops and ionization of the envelope begins, making the maser...
متن کاملDetection of amino acetonitrile in Sgr B2(N)
Aims. A small error was recently found in the program used to compute the integrated intensities in the article Belloche et al. (2008, A&A, 482, 179). Methods. We provide new versions of Fig. 2 and Tables 3, 5, and 7 with the correct integrated intensities. Results. The conclusions drawn by Belloche et al. (2008) are not significantly affected by these corrections. Only the mass, density, and c...
متن کاملthe effect of the record infancy in crimilly acts of guilties (in karaj city)
چکیده یکی از مهمترین دغدغه های بزرگ جوامع بشری، از دیر باز تا کنون که ذهن پژوهشگران و متخصصان بهداشت روانی و اجتماعی و دولتها رابه خود مشغول داشته، مسأله ی بزهکاری می باشد. شناخت کامل پدیده ی بزهکاری و بزهکار، علل وعوامل سقوط یک انسان، چگونگی درمان وی و درنهایت پیشگیری ازبزهکاری ودریک کلام سالم سازی یک جامعه، رسالت عظیم، انسانی ومقدسی می باشد که با بررسی شخصیت مجرم یعنی[ انسانی که تحت شرای...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1986
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/218.2.385