Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-28T22:30:46.327Z Has data issue: false hasContentIssue false

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

Published online by Cambridge University Press:  23 September 2016

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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
Copyright
Copyright © Kluwer 1989 

References

Allen, D.A., and Sanders, R.H., Nature , 319, 191, 1986.CrossRefGoogle Scholar
Allen, D.A., Hyland, A.R., and Hillier, D.J., IAU Symposium No 136 : The Galactic Center , 1988.CrossRefGoogle Scholar
Becklin, E.E and Neugebauer, G., Ap. J. (Letters) , 200, L71, 1975.CrossRefGoogle Scholar
De Poy, D.L., Gatley, I., and McLean, I., IAU Symposium No 136 : The Galactic Center , 1988.Google Scholar
Forrest, W.J., Shure, M.A., Pipher, J.L., and Woodward, C.E., in AIP Conference Proceedings 155, The Galactic Center , ed. Becker, D.C., p.153, 1987.Google Scholar
Geballe, T.R. et al. Ap. J. , 284, 118, 1984.CrossRefGoogle Scholar
Hall, D.N.B., Kleinmann, S.G., and Scoville, N.Z., Ap. J. (Letters) , 262, L53, 1982.CrossRefGoogle Scholar
Lacombe, F., Léna, P., and Rouan, D., in Infrared Astronomy with Arrays , ed. Wynn-Williams, C.G. and Becklin, E. E., U. of Hawaii, p.316, 1987.Google Scholar
Maillard, J.P., and Michel, G., in Instrumentation for Astronomy with Large Optical Telescopes , vol. 92, D. Reidel Pub., p. 213, 1982.CrossRefGoogle Scholar
Stein, W.A., and Forrest, W.J., Nature , 323, 232, 1986.CrossRefGoogle Scholar
Wollman, E.R., Smith, H.A., and Larson, H.P., Ap. J. , 258, 506, 1982.CrossRefGoogle Scholar