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Intrinsic Radio Variability of Sgr A*
Author(s) -
Zhao JunHui
Publication year - 2003
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200385096
Subject(s) - physics , astrophysics , flux (metallurgy) , light curve , oscillation (cell signaling) , astronomy , sma* , materials science , mathematics , combinatorics , biology , metallurgy , genetics
We review and summarize the results on the variability of Sgr A* based on the recent monitoring programs with the SMA at 1.3 and 0.87 mm, and the VLA at 2, 1.3 and 0.7 cm. We discuss the flares at 1.3 mm and a cross‐correlation of the SMA flux density at 1.3 mm with the VLA data at 1.3 cm. We also present a preliminary result on the double quasi‐periodic oscillation (DQPO) in flux density of Sgr A* based on our analysis of radio light curves observed with the VLA at 1.3 cm.