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Circumstellar Environments of MYSOs Revealed by IFU Spectroscopy

Published online by Cambridge University Press:  23 January 2015

F. Navarete ,
A. Damineli ,
C. L. Barbosa  and
R. D. Blum
F. Navarete
Affiliation:
IAG-USP, Rua do Matão, 1226, 05508-900, São Paulo, SPBrazil email: [email protected]
A. Damineli
Affiliation:
IAG-USP, Rua do Matão, 1226, 05508-900, São Paulo, SPBrazil email: [email protected]
C. L. Barbosa
Affiliation:
UNIVAP, São José dos Campos, SP, Brazil
R. D. Blum
Affiliation:
NOAO, 950 N Cherry Ave., Tuczon, AZ 85719USA
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Abstract

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Formation of massive stars (M > 8 M⊙) is still not well understood and lacks of observational constraints. We observed 7 MYSO candidates using the NIFS spectrometer at Gemini North Telescope to study the accretion process at high angular resolution (~ 50 mas) and very closer to the central star. Preliminary results for 2 sources have revealed circumstellar structures traced by Brackett-Gamma, CO lines and extended H2 emission. Both sources present kinematics in the CO absorption lines, suggesting rotating structures. The next step will derive the central mass of each source by applying a keplerian model for these CO features.

Keywords

Stars: formationStars: early-typeStars: pre-main sequenceStars: circumstellar matterTechniques: spectroscopicTechniques: high angular resolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 453 - 454
Copyright
Copyright © International Astronomical Union 2015 

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