Diazenylium is the chemical N2H+, an inorganic cation that was one of the first ions to be observed in interstellar clouds. Since then, it has been observed for in several different types of interstellar environments, observations that have several different scientific uses. It gives astronomers information about the fractional ionization of gas clouds, the chemistry that happens within those clouds, and it is often used as a tracer for molecules that are not as easily detected (such as N2). Its 1–0 rotational transition occurs at 93.174 GHz, a region of the spectrum where Earth's atmosphere is transparent and it has a significant optical depth in both cold and warm clouds so it is relatively easy to observe with ground-based observatories. The results of N2H+ observations can be used not
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- Diazénylium (fr)
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| - Diazenylium is the chemical N2H+, an inorganic cation that was one of the first ions to be observed in interstellar clouds. Since then, it has been observed for in several different types of interstellar environments, observations that have several different scientific uses. It gives astronomers information about the fractional ionization of gas clouds, the chemistry that happens within those clouds, and it is often used as a tracer for molecules that are not as easily detected (such as N2). Its 1–0 rotational transition occurs at 93.174 GHz, a region of the spectrum where Earth's atmosphere is transparent and it has a significant optical depth in both cold and warm clouds so it is relatively easy to observe with ground-based observatories. The results of N2H+ observations can be used not (en)
- Le cation diazénylium est une espèce chimique de formule N2H+, correspondant à une structure de la forme N≡N+–H. Il est présent dans le milieu interstellaire et est un élément important de la caractérisation physicochimique des nuages moléculaires, où il sert de traceur pour cartographier des molécules difficiles à détecter, telles que l'azote N2 qui est dépourvu de moment dipolaire. Il donne également des informations sur les réactions chimiques qui se déroulent dans ces environnements — plus particulièrement celles impliquant de l'azote — ainsi que sur la fraction de matière ionisée qui s'y trouve, voire sur les variations de densité et sur la distribution des vitesses au sein de ces nuages. (fr)
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| - Diazenylium is the chemical N2H+, an inorganic cation that was one of the first ions to be observed in interstellar clouds. Since then, it has been observed for in several different types of interstellar environments, observations that have several different scientific uses. It gives astronomers information about the fractional ionization of gas clouds, the chemistry that happens within those clouds, and it is often used as a tracer for molecules that are not as easily detected (such as N2). Its 1–0 rotational transition occurs at 93.174 GHz, a region of the spectrum where Earth's atmosphere is transparent and it has a significant optical depth in both cold and warm clouds so it is relatively easy to observe with ground-based observatories. The results of N2H+ observations can be used not only for determining the chemistry of interstellar clouds, but also for mapping the density and velocity profiles of these clouds. (en)
- Le cation diazénylium est une espèce chimique de formule N2H+, correspondant à une structure de la forme N≡N+–H. Il est présent dans le milieu interstellaire et est un élément important de la caractérisation physicochimique des nuages moléculaires, où il sert de traceur pour cartographier des molécules difficiles à détecter, telles que l'azote N2 qui est dépourvu de moment dipolaire. Il donne également des informations sur les réactions chimiques qui se déroulent dans ces environnements — plus particulièrement celles impliquant de l'azote — ainsi que sur la fraction de matière ionisée qui s'y trouve, voire sur les variations de densité et sur la distribution des vitesses au sein de ces nuages. N2H+ émet principalement à 93,174 GHz, une région du spectre électromagnétique où l'atmosphère terrestre est transparente, et possède une épaisseur optique significative dans le nuages froids et chauds, ce qui le rend facile à observer à l'aide d'équipements au sol. (fr)
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