@article{d6d989cccf374d66ab158cc5887a8263,
title = "Organic astrochemistry: Observations of interstellar ketene",
abstract = "We have observed emission from both ortho and para spin states of ketene (CH2CO) towards several deeply-embedded protostars. The low CH 2CO fractional abundances (∼10-10) and the rotation temperatures (∼20 K) are consistent with emission from the cooler envelope. We compare our results with previous studies and discuss possible production pathways to interstellar ketene. We suggest that, if low observed excitation temperatures of CH2CO, CH3CHO and H2CO are indicative of their absence from the hot core region, then this may be due to the extensive hydrogenation of pre-existing grain mantles prior to evaporation into the inner envelope, leading to lower abundances of these compounds and to mantles rich in alcohols.",
keywords = "Astrochemistry, ISM: abundances, ISM: clouds, ISM: molecules, Stars: formation",
author = "R. Ruiterkamp and Charnley, \{S. B.\} and Butner, \{H. M.\} and Huang, \{H. C.\} and Rodgers, \{S. D.\} and Kuan, \{Y. J.\} and P. Ehrenfreund",
note = "Funding Information: Acknowledgements This work was supported by NASA (Origins of Solar Systems, Long Term Space Astrophysics and Exobiology Programs) through NASA Ames Cooperative Agreement NCC2-1412 with the SETI Institute, the NASA Goddard Center for Astrobiology, NWO-VI 016.023.003 and NSC 95-2112-M-003-016. Funding Information: 1The National Radio Astronomy Observatory is operated by Associated Universities, Inc., under cooperative agreement with the National Science Foundation. The Kitt Peak 12 m telescope is now owned and operated by the Arizona Radio Observatory (ARO), Steward Observatory, University of Arizona, with partial funding from the Research Corporation.",
year = "2007",
month = aug,
doi = "10.1007/s10509-007-9493-9",
language = "English",
volume = "310",
pages = "181--188",
journal = "Astrophysics and Space Science",
issn = "0004-640X",
publisher = "Springer Netherlands",
number = "3-4",
}