scholarly journals Zwicky Transient Facility and Globular Clusters: the Period–Luminosity and Period–Luminosity–Color Relations for Late-type Contact Binaries

2021 ◽  
Vol 162 (2) ◽  
pp. 63
Author(s):  
Chow-Choong Ngeow ◽  
Szu-Han Liao ◽  
Eric C. Bellm ◽  
Dmitry A. Duev ◽  
Matthew J. Graham ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Late Type ◽  
Type Contact ◽  
Contact Binaries

scholarly journals Physical Parameters of Late-type Contact Binaries in the Northern Catalina Sky Survey

2020 ◽  
Vol 247 (2) ◽  
pp. 50 ◽  
Author(s):  
Weijia Sun ◽  
Xiaodian Chen ◽  
Licai Deng ◽  
Richard de Grijs
Keyword(s):  
Physical Parameters ◽  
Late Type ◽  
Sky Survey ◽  
Type Contact ◽  
Contact Binaries

scholarly journals Surface Imaging of Late-Type Contact Binaries II: Hα Emission in AE Phe and YY Eri

2006 ◽  
Vol 2 (S240) ◽  
pp. 719-723
Author(s):  
O. Vilhu ◽  
C. Maceroni
Keyword(s):  
Active Component ◽  
Theoretical Models ◽  
Surface Imaging ◽  
Late Type ◽  
Saturation Limit ◽  
Chromospheric Activity ◽  
Type Contact ◽  
Contact Binaries ◽  
Hα Emission

AbstractWe present and discuss the Hα (λ = 6563Å) observations of the contact (W UMa type) binaries AE Phoenicis and YY Eridani, obtained in 1989, 1990 and 1995 with the CAT/CES telescope of the Southern European Observatory (ESO). In particular, we compare the intrinsic equivalent widths of both components with the NextGen theoretical models and the saturation limit. We find that the average Hα equivalent widths are close to the saturation border and that the primary components have excess Hα-emission, indicating enhanced chromospheric activity. This is compatible with both theoretical and observational suggestions that the primary is the more magnetically active component and is filled with (mostly unresolvable) dark spots and associated chromospheric plages.

scholarly journals Light curve analysis of the late type binary V523 Cassiopeiae

2009 ◽  
pp. 45-48 ◽  
Author(s):  
O. Latkovic ◽  
M. Zboril ◽  
G. Djurasevic
Keyword(s):  
Light Curve ◽  
Monitoring Program ◽  
Neck Region ◽  
Bright Spot ◽  
Late Type ◽  
Light Curve Analysis ◽  
Type Contact ◽  
Contact Binary ◽  
Previous Solution

We present the analysis of V and R light curves of the late type contact binary V523 Cas for the season of 2006. These observations make part of the monitoring program aimed at studying the long-term light curve variability in this system. Our results confirm that the system is in an over contact configuration, and include a bright spot in the neck region of the cooler and larger primary. We compare these results with the previous solution, obtained for the season 2005 dataset and discuss the differences.

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