SIMBAD references

2012MNRAS.423.3646Q - Mon. Not. R. Astron. Soc., 423, 3646-3651 (2012/July-2)

Optical flares and flaring oscillations on the m-type eclipsing binary CU Cancri.

QIAN S.-B., ZHANG J., ZHU L.-Y., LIU L., LIAO W.-P., ZHAO E.-G., HE J.-J., LI L.-J., LI K. and DAI Z.-B.

Abstract (from CDS):

In this paper, we report on the discovery of an optical flare observed in the R band from the red-dwarf eclipsing binary CU Cancri, whose component stars are at the upper boundary of full convection (M1= 0.43 M and M2= 0.4 M, where Mis the solar mass). The amplitude of the flare is the largest among those detected in the R band (∼0.52 mag) and the duration time is about 73 min. Like flares observed on the Sun, quasi-periodic oscillations were seen during and after the flare. Three more R-band flares were found by follow-up monitoring. In total, this binary was monitored photometrically by using an R filter for 79.9 h, which has revealed an R-band flare rate of about 0.05 flares per hour. Together with other strong chromospheric and coronal activities (i.e. very strong Hα and Hβemission features and an extreme ultraviolet and X-ray source), these detections indicate that it has very strong magnetic activity. Therefore, the apparent faintness (∼1.4 mag in the V band) of CU Cnc, compared with other single red dwarfs of the same mass, can be plausibly explained by the high coverage of dark spots.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): stars: activity - binaries: close - binaries: eclipsing - stars: flare - stars: individual: CU Cancri - stars: late-type

Simbad objects: 12

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