Quasi-Periodic Formaldehyde Maser Flares in the Massive Protostellar Object IRAS18566 0408 - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




Quasi-Periodic Formaldehyde Maser Flares in the Massive Protostellar Object IRAS18566 0408 - Astrophysics > Astrophysics of Galaxies - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We report results of an extensive observational campaign of the 6 cmformaldehyde maser in the young massive stellar object IRAS18566+0408G37.55+0.20 conducted from 2002 to 2009. Using Arecibo, VLA, and GBT, wediscovered quasi-periodic formaldehyde flares P ~ 237 days. Based on Areciboobservations, we also discovered correlated variability between formaldehydeH2CO and methanol CH3OH masers. The H2CO and CH3OH masers are not spatiallycoincident, as demonstrated by different line velocities and high angularresolution MERLIN observations. The flares could be caused by variations in theinfrared radiation field, possibly modulated by periodic accretion onto a youngbinary system.



Autor: E. D. Araya, P. Hofner, W. M. Goss, S. Kurtz, A. M. S. Richards, H. Linz, L. Olmi, M. Sewilo

Fuente: https://arxiv.org/



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