Hostname: page-component-848d4c4894-ndmmz Total loading time: 0 Render date: 2024-05-17T12:31:15.129Z Has data issue: false hasContentIssue false
  • English
  • Français

A Survey of Radio Recombination Line Emission From the Galactic Center Region

Published online by Cambridge University Press:  23 September 2016

K. R. Anantharamaiah  and
Farhad Yusef-Zadeh
K. R. Anantharamaiah
Affiliation:
NRAO-VLA, P.O. Box O, Socorro, NM 87801
Farhad Yusef-Zadeh
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center and Northwestern University

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.

Preliminary results of a systematic survey of H78α, H91α and H98β emission from the inner 40′ of the Galactic center region are presented. This region consists of two prominent continuum features, the Sgr A complex and the radio continuum Arc. In spite of much nonthermal emission arising from these two features, we detected strong line emission with large line widths in more than half of the observed 130 positions. Many of the detections are new, in particular −50 km s−1 ionized gas linking the Sgr A complex and the Arc, β line emission from GO.1+0.08 (the arched filaments), and α line emission from the loop-like structures which surround the non-thermal filaments near G0.2−0.05. We find that much of the detected lines are probably associated with the −50 km s−1 and the 20 km s−1 molecular clouds, known to lie near the Galactic center. We present line profiles of a number of Galactic center sources including Sgr B1, Sgr C and Sgr D.

Type
The Large - Scale Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 159 - 166
Copyright
Copyright © Kluwer 1989 

References

Bally, J., Stark, A., Wilson, R. and Henkel, C. 1988, Ap.J. , 324, 223.Google Scholar
Bell, M.B., Seaquist, E.R., 1980, Astrophys. J. , 238, 818.Google Scholar
Gardner, F.F., Whiteoak, J.B., 1977 Proc. Astron. Soc. Aust. , 3, 150.Google Scholar
Ginzburg, V.L. and Syrovatskii, S.I. 1964, The Origin of Cosmic Rays , (MacMillan, New York).Google Scholar
Lasenby, J., Lasenby, A.N., Yusef-Zadeh, F. 1989, this conference.Google Scholar
Mezger, P.G. and Wink, J.E. 1986, Astron. Astrophys. , 157, 252.Google Scholar
Mezger, P.G., Zylka, R., Salter, C.J., Wink, J.E., Chini, R., Kreysa, E., 1988, this conference. Google Scholar
Pauls, T., Mezger, P.G., Churchwell, E., 1974 Astron. Astrophys. , 34, 327.Google Scholar
Pauls, T., Downes, D., Mezger, P.G., Churchwell, E., 1976, Astron. Astrophys. 46, 407.Google Scholar
Pauls, T., Mezger, P.G., 1980, Astron. Astrophys. , 85, 26.Google Scholar
Reich, W., Sofue, Y. and Fürst, E. 1988, preprint.Google Scholar
Serabyn, E. and Güsten, R., 1987, Astron. Astrophys. , 184, 183.Google Scholar
Sofue, Y., Inoue, M., Handa, T., Tsuboi, M., Hirabayashi, H., Morimoto, M. Akabane, K., 1986, Publ. Astron. Soc. Japan , 38, 475.Google Scholar
Yusef-Zadeh, F., Morris, M., Chance, D. 1984, Nature , 310, 557.Google Scholar
Yusef-Zadeh, F., Morris, M., van Gorkom, J.H. 1989, this conference. Google Scholar
Yusef-Zadeh, F., Morris, M., van Gorkom, J.H. 1987, in The Galactic Center , ed. Backer, D.C. (New York: AIP), p190 Google Scholar
Yusef-Zadeh, F., Morris, M. 1987, Ap.J. , 320, 545.Google Scholar
Yusef-Zadeh, F., 1986, Ph.D Thesis, Columbia University. Google Scholar