| |
 |
| Paper: |
A Photometric Monitoring of the M-type Eclipsing Binary CU Cnc |
| Volume: |
451, 9th Pacific Rim Conference on Stellar Astrophysics |
| Page: |
163 |
| Authors: |
Jiang, L. Q.; Qian, S. B. |
| Abstract: |
CU Cancri is an eclipsing binary which is composed of two M-type companions. We detected a large red flare of CU Cnc in the R-band with
the 60-cm telescope in Yunnan Astronomical Observatory on October 28,
2009. The amplitude of the flare is about of 0.52 mag and the duration time is about 73 minutes. Another three flares in the same band were detected during 90.8-hours monitoring, which reveal a red flare rate of 0.044 flares per hour. CU Cnc also has
other strong chromospheric and coronal emissions. These detections together with the emissions indicate that it has the
strongest magnetic activity, and compared with other single red dwarfs of
the same mass, CU Cnc is fainter (∼1.4 magnitude in V-band). This
phenomenon may be plausibly explained by the
coverage of the dark spots. That means the coverage of dark spots on
red-dwarf eclipsing binaries may be seriously underestimated before. |
|
|
|
|
|
