PREDNASAJUCI / LECTURER :

Patricia Araya

(1) Universidad de Concepción, Chile

NAZOV / TITLE :

Spectroscopic analysis and modeling of the double periodic
variable DPV 065


ABSTRAKT / ABSTRACT :

Double periodic variables (DPVs) are interacting binary systems
characterized by two photometric cycles: one associated with the
orbital period and another, typically longer one, whose physical origin
remains uncertain. In this work, I present a spectroscopic study of the
system DPV 065, focusing on the analysis of its Hα profiles and the
construction of Doppler tomograms to investigate the structure and
dynamics of the circumstellar material. The tomographic maps reveal notable
variations along the long cycle, suggesting changes in the disk’s
emission and mass transfer rate. To interpret these results, we are
employing SHELLSPEC and PySHELLSPEC to generate synthetic spectra and
Doppler maps corresponding to different physical configurations of the
disk and other features of the system like spots or jets. By comparing
these models with the observed spectra, we aim to identify the most
plausible disk structure and constrain the mechanisms driving the
long-term variability in DPVs.