Survey Observations of a Possible Glycine Precursor, Methanimine (CH$_2$NH)
| dc.contributor.author | SUZUKI, Taiki, | |
| dc.contributor.author | OHISHI, Masatoshi, | |
| hal.structure.identifier | Graduate School of Frontier Sciences | |
| dc.contributor.author | HIROTA, Tomoya, | |
| dc.contributor.author | SAITO, Masao, | |
| hal.structure.identifier | AMOR 2016 | |
| dc.contributor.author | MAJUMDAR, Liton | |
| hal.structure.identifier | AMOR 2016 | |
| dc.contributor.author | WAKELAM, Valentine | |
| dc.date.issued | 2016-05 | |
| dc.identifier.issn | 0004-637X | |
| dc.description.abstractEn | 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. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.subject.en | Astrophysics - Astrophysics of Galaxies | |
| dc.subject.en | Astrophysics - Solar and Stellar Astrophysics | |
| dc.title.en | Survey Observations of a Possible Glycine Precursor, Methanimine (CH$_2$NH) | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3847/0004-637X/825/1/79 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.identifier.arxiv | 1605.02161 | |
| bordeaux.journal | The Astrophysical Journal | |
| bordeaux.page | id. 79 | |
| bordeaux.volume | 825 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01323922 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01323922v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2016-05&rft.volume=825&rft.issue=1&rft.spage=id.%2079&rft.epage=id.%2079&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=SUZUKI,%20Taiki,&OHISHI,%20Masatoshi,&HIROTA,%20Tomoya,&SAITO,%20Masao,&MAJUMDAR,%20Liton&rft.genre=article |
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