Photometric activity of CQ Tau on the time interval of 125 years

Abstract

The star CQ Tau belongs to the family of UX Ori type stars. It has very complex photometric behavior and complex structure of the circumstellar environment. In our paper we constructed the historical 125 years light curve of this star basing on the published photometric observations. It follows that besides a random component characteristic of UX Ori type stars, the large amplitude periodic component with the 10 year period is also present. Its existence was suspected earlier in [11]. New observations confirm its reality. It points to an existence of the second component close to the star. The density waves and matter flows caused by the companion motion lead to periodic changes in the circumstellar extinction and brightness of the star. This result is discussed in context of the recent observations of CQ Tau with high angular resolution.

7 pages, 4 figures, accepted by Astrophysics

References in corpus (7)

• A Millimeter Continuum Size-Luminosity Relationship for Protoplanetary Disks
• Disks around CQ Tau and MWC 758: dense PDR or gas dispersal?
• A dust and gas cavity in the disc around CQ Tau revealed by ALMA
• A highly non-Keplerian protoplanetary disc: Spiral structure in the gas disc of CQ Tau
• Near-Infrared Imaging of a Spiral in the CQ Tau Disk
• External or internal companion exciting the spiral arms in CQ Tau?
• Apparent motion of the circumstellar envelope of CQ Tau in scattered light

Cited by in corpus (2)

• Simulation of the Free Fall of a Gas Stream on a Protoplanetary Disk
• Structure of the Stellar Neighborhood of CQ Tau in the Presence of a Companion in an Elongated Orbit