The H2O supermaser region in Orion KL: Epoch 1982.9

Autor:	V. A. Demichev, L. I. Matveenko, K. M. Zakharin
Rok vydání:	2003
Předmět:	Physics Spatial structure Epoch (astronomy) Astronomy Astronomy and Astrophysics Radius Astrophysics Rotation law.invention Space and Planetary Science law Orion Nebula Protostar Maser Flare
Zdroj:	Astronomy Reports. 47:99-109
ISSN:	1562-6881 1063-7729
DOI:	10.1134/1.1545573
Popis:	Radio interferometric observations of an H2O maser flare in the Orion Nebula at epoch 1982.9 have been used to determine the flare’s spatial structure. Antennas in the Crimea, Effelsberg, and Onsala were used. The emission region consists of three groups of components. The angular sizes of the components are 0.2–0.9 mas, and the widths of the emitted lines are 0.2–0.7 km/s. The velocities of the components are correlated with their relative positions, which correspond to expanding concentric rings. Assuming a 1 M⊙ protostar in a Keplerian approximation, the radius of the inner ring R is 15 AU, the velocity of its rotation Vrot is 8.98 km/s, and the radial component of the velocity Vrad is 1.79 km/s. For the outer ring, R=15.7 AU, Vrot=8.79 km/s, and Vrad=2.61 km/s.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::406dd1b5ea2d06c7a0396c8388843e40 https://doi.org/10.1134/1.1545573 Zobrazit plný text záznamu Plný text ve formátu PDF