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26 April 2024

» arxiv » 1411.0746

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No Microwave Flare of Sagittarius A* around the G2 Periastron Passing
Masato Tsuboi ; Yoshiharu Asaki ; Osamu Kameya ; Yoshinori Yonekura ; Yusuke Miyamoto ; Hiroyuki Kaneko ; Masumichi Seta ; Naomasa Nakai ; Hiroshi Takaba ; Ken-ichi Wakamatsu ; Makoto Miyoshi ; Yoshihiro Fukuzaki ; Kenta Uehara ; Mamoru Sekido ;
Date:	4 Nov 2014
Abstract:	In order to explore any change caused by the G2 cloud approaching, we have monitored the flux density of Sgr A* at 22 GHz from Feb. 2013 to Aug. 2014 with a sub-array of Japanese VLBI Network . The observation period included the expected periastron dates. The number of observation epochs was 283 days. We have observed no significant microwave enhancement of Sgr A* in the whole observation period. The average flux density in the period is $S=1.23+/-0.33$ Jy. The average is consistent with the usually observed flux density range of Sgr A* at 22 GHz.
Source:	arXiv, 1411.0746
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