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Recombination line masers in YSOs

Published online by Cambridge University Press:  03 August 2017

Jesús Martín-Pintado
Jesús Martín-Pintado*
Affiliation:
Observatorio Astronómico Nacional (IGN), Campus Universitario, Apartado 1143, E-28800 Alcalá de Henares, Spain

Abstract

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Maser emission from recombination lines has been detected towards the Young Stellar Object (YSO) MWC349 and the massive evolved star η Carinae. In spite of extensive searches of recombination line maser emission at millimeter wavelengths towards massive star forming regions, MWC349 remains unique. MWC349 is also a strong recombination line laser in the Far-IR with the largest amplification observed for transitions at wavelengths around 400 μm. The observational properties of the recombination line maser and laser emission from MWC349 are reviewed. Modeling of the maser and laser emission in MWC349 will be used to illustrate the potential of this kind of masers to understand the early phases of the evolution of massive stars. The impact that future instruments like the Herschel, the SMA and specially ALMA, will have in the investigation of recombination line maser emission from YSOs is briefly discussed.

Type
Part 1. Star Formation
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 226 - 233
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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