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Possible regular phenomena in EXO 2030+375
Eva Laplace, Tatehiro Mihara, Yuki Moritani +4
In the last 10 years, since its last giant outburst in 2006, regular X-ray outbursts (type I) were detected every periastron passage in the Be X-ray binary EXO 2030+375. Recently,…
Large X-ray Flares on Stars Detected with MAXI/GSC: A Universal Correlation between the Duration of a Flare and its X-ray Luminosity
Yohko Tsuboi, Kyohei Yamazaki, Yasuharu Sugawara +39
23 giant flares from 13 active stars (eight RS CVn systems, one Algol system, three dMe stars and one YSO) were detected during the first two years of our all-sky X-ray monitoring…
Hard X-ray Luminosity Function of Tidal Disruption Events: First Results from MAXI Extragalactic Survey
Taiki Kawamuro, Yoshihiro Ueda, Megumi Shidatsu +4
We derive the first hard X-ray luminosity function (XLF) of stellar tidal disruption events (TDEs) by supermassive black holes (SMBHs), which gives an occurrence rate of TDEs per u…
Hard-tail emission in the soft state of low-mass X-ray binaries and their relation to the neutron star magnetic field
Kazumi Asai, Tatehiro Mihara, Masaru Mastuoka +1
Average hard-tail X-ray emission in the soft state of nine bright Atoll low-mass X-ray binaries containing a neutron star (NS-LMXBs) are investigated by using the light curves of M…
Probing the stellar wind environment of Vela X-1 with MAXI
C. Malacaria, T. Mihara, A. Santangelo +4
Vela X-1 is among the best studied and most luminous accreting X-ray pulsars. The supergiant optical companion produces a strong radiatively-driven stellar wind, which is accreted…
Application of the Ghosh & Lamb Relation to the Spin-up/down Behavior in the X-ray Binary Pulsar 4U 1626-67
Toshihiro Takagi, Tatehiro Mihara, Mutsumi Sugizaki +2
We analyzed continuous MAXI/GSC data of the X-ray binary pulsar 4U 1626-67 from 2009 October to 2013 September, and determined the pulse period and the pulse-period derivative for…