Por favor, use este identificador para citar o enlazar este ítem:
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1048| Maser emission toward the very young massive star GH₂O 092.67+03.07 (IRAS 21078+5211) | |
| EVGUENI LEKHT EVGUENIEVICH | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Results of monitoring of the H₂O maser observed toward the infrared source IRAS 21078+5211 in the giant molecular cloud Cygnus OB7 are presented. The observations were carried out on the 22-m radio telescope of the Pushchino Radio Astronomy Observatory (Russia) from April 1992 to March 2006. Five cycles of maser activity at various levels were observed. In the periods of highest activity, the spectrum of the H₂O maser emission extended from −43 to 12 km/s. During strong flares, the flux densities in some emission features reached nearly 600 Jy. The protostar has a small peculiar velocity with respect to the CO molecular cloud (∼2 km/s). Based on the character of the radial-velocity variations and the tendency for the linewidth to increase with the flux, it is concluded that the médium is strongly fragmented and that there is a small-scale turbulent outflow of gas in the H₂O maser region, which may impede the formation of an HII region. The asymmetric distribution of the maser components in Vlsr, the difference in the average linewidths of the central and lateral clusters of components, and the fairly high radial velocities relative to the molecular cloud (especially during periods of the highest maser activity) suggest that the maser spots belong to different clusters and different structures of the source: a disk and bipolar outflow. | |
| Astronomy reports | |
| 2008 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Pashchenko, M. I., ET AL., (2008). Maser emission toward the very young massive star GH₂O 092.67+03.07 (IRAS 21078+5211), Astronomy reports, Vol.52(3):211–225 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| 22_Maser emission in direction of the very massive star GH2O 092.67+03.07.pdf | 854.41 kB | Adobe PDF | Visualizar/Abrir |