[Speaker1]
TANIGUCHI Kotomi , D1, SOKENDAI, Mitaka(supervisor: SAITO Masao)
[Title]
Formation Mechanisms of HC5N in TMC-1 as Studied by 13C and 15N Isotopic Fractionation
[Abstract]
Observations of 13C isotopic fractionation is key to reveal main formation mechanisms of carbon-chain molecules. HC5N is generally though to be formed by growth of carbon chain of HC3N. I carried out observations of the normal species and the five 13C isotopologues of HC5N in order to confirm its main formation pathway. I found that main formation mechanism of HC5N is ion-molecule reactions involving a nitrogen atom. I also conducted quantitative evaluation of contributions of each pathway using the 14N/15N and 12C/13C ratios, and concluded that about 70% of HC5N molecules have been formed by the ion-molecule reactions involving a nitrogen atom.

[Speaker2]
Misaki Ando , M1, SOKENDAI, Mitaka(supervisor: Daisuke Iono)
[Title]
The condition of molecular gas in starburst galaxy

[Speaker3]
Yoshida Masaki , M1, SOKENDAI, Mitaka(supervisor: Suematsu Yoshinori)
[Title]
Estimating a reconnection rate based on an observation of inflow and flare ribbon expansion