Abstract
view Abstract Citations (104) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Detection of SiO Emission in the L1157 Dark Cloud Mikami, Hitomi ; Umemoto, Tomofumi ; Yamamoto, Satoshi ; Saito, Shuji Abstract Intense thermal emission lines of SiO (v = 0, J = 1-0 and 2-1) are detected in a low-mass star-forming region, L1157. The emission is confined to a compact region toward the blue lobe of the CO outflow, where shock heating due to interaction between the outflow and dense gas has been found. In contrast, the emission of SiO is not detected toward the IRAS source and the red lobe. The distribution of SiO is different from that of CS; the intense CS line is observed in the vicinity of the IRAS source. The peak fractional abundance of SiO is estimated to be about 10 exp -7. This value is higher than a typical upper limit in quiescent dark clouds by a factor of about 10,000. These results suggest that SiO is produced in the shocked region probably through grain destruction processes. Publication: The Astrophysical Journal Pub Date: June 1992 DOI: 10.1086/186432 Bibcode: 1992ApJ...392L..87M Keywords: Emission Spectra; Infrared Astronomy Satellite; Interstellar Matter; Molecular Clouds; Silicon Oxides; Star Formation; Stellar Evolution; Stellar Mass; Astrophysics; ISM: ABUNDANCES; ISM: MOLECULES; STARS: FORMATION; SHOCK WAVES full text sources ADS | data products SIMBAD (9)
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