SUZUKI, Taiki,; OHISHI, Masatoshi,; HIROTA, Tomoya,; SAITO, Masao,; MAJUMDAR, Liton; WAKELAM, Valentine

doi:10.3847/0004-637X/825/1/79

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

SUZUKI, Taiki,

OHISHI, Masatoshi,

HIROTA, Tomoya,
Graduate School of Frontier Sciences

Idioma

Article de revue

Este ítem está publicado en

The Astrophysical Journal. 2016-05, vol. 825, n° 1, p. id. 79

American Astronomical Society

Resumen en inglés

We conducted survey observations of a glycine precursor, methanimine or methylenimine (CH$_2$NH), with the NRO 45 m telescope and the SMT telescope towards 12 high-mass and two low-mass star-forming regions in order to increase number of CH$_2$NH sources and to better understand the characteristics of CH2NH sources. As a result of our survey, CH$_2$NH was detected in eight sources, including four new sources. The estimated fractional abundances were ~10$^8$ in Orion KL and G10.47+0.03, while they were ~10$^9$ towards the other sources. Our hydrogen recombination line and past studies suggest that CH$_2$NH-rich sources have less evolved HII regions. The less destruction rates by UV flux from the central star would be contributed to the high CH$_2$NH abundances towards CH$_2$NH-rich sources. Our gas-grain chemical simulations suggest that CH$_2$NH is mostly formed in the gas-phase by neutral-neutral reactions rather than the product of thermal evaporation from the dust surfaces.< Leer menos

Palabras clave en inglés

Astrophysics - Astrophysics of Galaxies

Astrophysics - Solar and Stellar Astrophysics

Metadatos

Licencia de uso del documento

Survey Observations of a Possible Glycine Precursor, Methanimine (CH$_2$NH)

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en inglés

DOI

Orígen

Centros de investigación