Modeling of CoRoT and Spitzer lightcurves in NGC 2264 caused by an optically thick warp

Abstract

Aims. We present an analysis of simultaneously observed CoRoT and Spitzer lightcurves for four systems in the stellar forming region NGC 2264: Mon-660, Mon-811, Mon-1140, and Mon-1308. These objects share in common a strong resemblance between the optical and infrared lightcurves, such that the mechanism responsible for producing them is the same. The aim of this paper is to explain both lightcurves simultaneously with only one mechanism. Methods. We modeled the infrared emission as coming from a warp composed of an optically thick wall and an optically thick asymmetric disk beyond this location. We modeled the optical emission mainly by partial stellar occultation by the warp. Results. The magnitude amplitude of the CoRoT and Spitzer observations for all the objects can be described with the emission coming from the system components. The difference between them is the value of the disk flux compared with the wall flux and the azimuthal variations of the former. This result points out the importance of the hydrodynamical interaction between the stellar magnetic field and the disk. Conclusions. CoRoT and Spitzer lightcurves for the stellar systems Mon-660, Mon-811, Mon-1140, and Mon-1308 can be simultaneously explained using the emission coming from an asymmetric disk and emission with stellar occultation by an optically thick wall.