Frequent flare events on the short-period M-type eclipsing binary BX Tri. (arXiv:1901.06106v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Luo_C/0/1/0/all/0/1">ChangQing Luo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_X/0/1/0/all/0/1">XiaoBin.Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wang_K/0/1/0/all/0/1">Kun Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Liu_C/0/1/0/all/0/1">Chao Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fang_X/0/1/0/all/0/1">Xiangsong Fang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_C/0/1/0/all/0/1">Chunguang Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Deng_L/0/1/0/all/0/1">Licai Deng</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nie_J/0/1/0/all/0/1">Jundan Nie</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fox_Machado_L/0/1/0/all/0/1">Lester Fox-Machado</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Luo_Y/0/1/0/all/0/1">Yangping Luo</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Niu_H/0/1/0/all/0/1">Hubiao Niu</a>
We present long-term, multi-color photometric monitoring and spectroscopic
observations of the short-period M-type eclipsing binary BX Tri. Six flare
events were recorded in 4 years from 2014 to 2017. Three of them were detected
on one night within an orbital cycle. The strongest one was identified on
December 23, 2014. With the amplitudes of $Delta$B=0.48 mag, $Delta$V=0.28
mag, $Delta$R=0.10 mag, $Delta$I=0.02 mag, the total energy due to the flare
event was measured to be 4.08 ($pm$0.24) $times$$10^{34}$ erg, exceeding the
superflare level ($10^{34}$). Based on the observations, the evolutionary
status of the binary system as well as the long-term orbital period changes
were analyzed. It reveals that BX Tri is probably a semi-detached system with
the primary component filling its Roche lobe. The extremely high occurrence of
flare events of the binary could be related to the rapid mass transfer between
components.
We present long-term, multi-color photometric monitoring and spectroscopic
observations of the short-period M-type eclipsing binary BX Tri. Six flare
events were recorded in 4 years from 2014 to 2017. Three of them were detected
on one night within an orbital cycle. The strongest one was identified on
December 23, 2014. With the amplitudes of $Delta$B=0.48 mag, $Delta$V=0.28
mag, $Delta$R=0.10 mag, $Delta$I=0.02 mag, the total energy due to the flare
event was measured to be 4.08 ($pm$0.24) $times$$10^{34}$ erg, exceeding the
superflare level ($10^{34}$). Based on the observations, the evolutionary
status of the binary system as well as the long-term orbital period changes
were analyzed. It reveals that BX Tri is probably a semi-detached system with
the primary component filling its Roche lobe. The extremely high occurrence of
flare events of the binary could be related to the rapid mass transfer between
components.
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