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Velocity-Resolved Spectra of Brα and Brγ on IRS16 SW and NE

Published online by Cambridge University Press:  23 September 2016

J. P. Maillard  and
J. Gay
J. P. Maillard
Affiliation:
Institut d'Astrophysique de Paris 98b Blvd Arago, Paris 75014 - France
J. Gay
Affiliation:
B.P. 139, Nice 06003 - France

Abstract

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The source IRS16 has been observed with the FTS at the Canada-France -Hawaii Telescope, in July 1987 and May 1988, in an attempt of spectral resolution associated with spatial resolution. Three positions were observed with a 2.5 arcsec aperture, centered on the sub-structures SW, NE and NW. Brα and Brγ spectra were obtained at respective velocity resolutions of 210 and 140 km s−1, allowing resolution of the line profiles. The detection of hydrogen emission was marginal on NW, and strong on SW and NE, showing a net velocity difference of the gas of 160 km s−1. The Brα line on SW has very extended wings suggesting two components of different origin. These observations imply a difference of physical nature of the objects located in the vicinity of Sgr A∗.

Type
The Compact Central Objects
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 517 - 521
Copyright
Copyright © Kluwer 1989 

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