منابع مشابه
Atomic silicon towards the Orion-KL nebula
We have used the Long Wavelength Spectrometer (LWS) on board ISO to observe the fine structure lines of atomic silicon at 68.5 and 129.7 microns towards the Orion KleinmannLow nebula. Our data show evidence for the detection of the J=2-1 transition at 68.5μm with a signal-to-noise ratio of 5. We consider the formation of the observed emission line and conclude that it is likely to form in the C...
متن کاملRadiative Transfer Models of Emission and Absorption in the H2o 6 Micron Vibration-rotation Band toward Orion-bn-kl
We report the spectrum of Orion-BN/KL between 5.3 and 7.2 mm observed with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory. H2O lines of the –0 bending mode with l ! n 5 1 2 6.3 mm (the R-branch) are observed in absorption, while lines with l 1 6.3 mm (the P-branch) are observed in emission. Radiative transfer models including the (0, 0, 0), (0, 1, 0), and (0, 0,...
متن کاملPolarisation observations of H2O JK-1 K1 = 532 − 441 620.701 GHz maser emission with Herschel/HIFI in Orion KL ⋆⋆⋆
Context. The high intensities and narrow bandwidths exhibited by some astronomical masers make them ideal tools for studying star-forming giant molecular clouds. The water maser transition JK−1K1 = 532−441 at 620.701 GHz can only be observed from above Earth’s strongly absorbing atmosphere; its emission has recently been detected from space. Aims. We sought to further characterize the star-form...
متن کاملSearching for trans ethyl methyl ether in Orion KL.
We report on the tentative detection of trans ethyl methyl ether (tEME), t-CH3CH2OCH3, through the identification of a large number of rotational lines from each one of the spin states of the molecule towards Orion KL. We also search for gauche-trans-n-propanol, Gt-n-CH3CH2CH2OH, an isomer of tEME in the same source. We have identified lines of both species in the IRAM 30 m line survey and in t...
متن کاملH2O megamaser emission from FR I radio galaxies
A systematic search for 22 GHz H2O megamaser emission is reported for 50 nearby (z <∼ 0.15) FR I galaxies. No detection was obtained, implying that ultraluminous H2O masers (LH2O > 10 3 L ) must be rare in early-type galaxies with FR I radio morphology. Despite higher radio core luminosities the detection rate for our sample is lower than in similar surveys of late-type Seyfert galaxies. This p...
متن کاملذخیره 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: Symposium - International Astronomical Union
سال: 1990
ISSN: 0074-1809
DOI: 10.1017/s0074180900187844