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Short-Term Variability of Sagittarius A* at Millimeter Wavelengths

Published online by Cambridge University Press:  12 April 2016

T. Tsutsumi ,
T. Kawabata ,
A. Miyazaki  and
M. Tsuboi
T. Tsutsumi
Affiliation:
Nobeyama Radio Observatory, NAOJ, Nobeyama, Japan
T. Kawabata
Affiliation:
Bisei Astronomical Observatory, Okayama, Japan
A. Miyazaki
Affiliation:
Institute of Astrophysics and Planetary Science, Ibaraki University, Ibaraki, Japan
M. Tsuboi
Affiliation:
Institute of Astrophysics and Planetary Science, Ibaraki University, Ibaraki, Japan

Abstract

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We present preliminary results from the observations of the Galactic Center compact source, Sgr A* at 3 and 2 millimeter wavelengths using the Nobeyama Millimeter Array to monitor flux density variations on timescales shorter than a month. Such high spatial resolution observations at millimeter wavelengths are important to shed more light on the origin of the variability and the nature of this compact source. Our observations indicate the flux density varies at least by ~30% in one to two weeks at 3 mm.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 207 - 208
Copyright
Copyright © Astronomical Society of the Pacific 1998

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