Early science with the Large Millimeter Telescope: molecules in the extreme outflow of a protoplanetary nebula
| Autor: | Lizette Guzman-Ramirez, Raghvendra Sahai, Alfredo Montaña, A Luna, Arturo I. Gómez-Ruiz, David H. Hughes, Albert A. Zijlstra, F. P. Schloerb, Gopal Narayanan, M. Chavez-Dagostino, David Sánchez-Arguelles, E. O. Serrano, Mónica Rodríguez, M. S. Yun |
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| Rok vydání: | 2017 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
Large Millimeter Telescope FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences law.invention Protoplanetary nebula Telescope law 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics Nebula Range (particle radiation) 010308 nuclear & particles physics Astronomy Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Full width at half maximum Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Millimeter Outflow Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711), 467(1), L61-L65 Gómez-Ruiz, A I, Guzman-Ramirez, L, Serrano, E O, Sanchez-Argüelles, D, Luna, A, Schloerb, F P, Narayanan, G, Yun, M S, Sahai, R, Zijlstra, A, Chavez-Dagostino, M, Montaña, A, Hughes, D H & Rodríguez, M 2017, ' Early Science with the Large Millimetre Telescope : Molecules in the Extreme Outflow of a proto-Planetary Nebula ', Monthly Notices of the Royal Astronomical Society, vol. 467, no. 1, pp. L61-L65 . https://doi.org/10.1093/mnrasl/slw259 |
| ISSN: | 1745-3933 1745-3925 |
| DOI: | 10.1093/mnrasl/slw259 |
| Popis: | Extremely high velocity emission likely related to jets is known to occur in some proto-Planetary Nebulae. However, the molecular complexity of this kinematic component is largely unknown. We observed the known extreme outflow from the proto-Planetary Nebula IRAS 16342-3814, a prototype water fountain, in the full frequency range from 73 to 111 GHz with the RSR receiver on the Large Millimetre Telescope. We detected the molecules SiO, HCN, SO, and $^{13}$CO. All molecular transitions, with the exception of the latter are detected for the first time in this source, and all present emission with velocities up to a few hundred km s$^{-1}$. IRAS 16342-3814 is therefore the only source of this kind presenting extreme outflow activity simultaneously in all these molecules, with SO and SiO emission showing the highest velocities found of these species in proto-Planetary Nebulae. To be confirmed is a tentative weak SO component with a FWHM $\sim$ 700 km s$^{-1}$. The extreme outflow gas consists of dense gas (n$_{\rm H_2} >$ 10$^{4.8}$--10$^{5.7}$ cm$^{-3}$), with a mass larger than $\sim$ 0.02--0.15 M$_{\odot}$. The relatively high abundances of SiO and SO may be an indication of an oxygen-rich extreme high velocity gas. Accepted for publication in Monthly Notices of the Royal Astronomical Society Letters |
| Databáze: | OpenAIRE |
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