V2653 Ophiuchii with a pulsating component and Ppuls-Porb, Ppuls-g correlations for gamma-Dor type pulsators

Abstract

We present new spectroscopic observations of the double-lined eclipsing binary V2653\,Oph. The photometric observations obtained by $ASAS$ were analysed and combined with the analysis of radial velocities for deriving the absolute parameters of the components. Masses and radii were determined for the first time as M${}_p$=1.537$\pm$0.021 M${}_{\odot }$ and R${}_p$=2.215$\pm$0.055 R${}_{\odot }$, M${}_s$=1.273$\pm$0.019 M${}_{\odot }$ and R${}_s$=2.000$\pm$0.056 R${}_{\odot }$ for the components of V2653\,Oph. We estimate an interstellar reddening of 0.15$\pm$0.08\,mag and a distance of 300$\pm$50\,pc for the system, both supporting the membership of the open cluster Collinder\,359. Using the out-of-eclipse photometric data we have made frequency analysis and detected a periodic signal at 1.0029$\pm$0.0019\,c/d. This frequency and the location of the more massive star on the HR diagram lead to classification of a $\gamma$ Dor type variable. Up to date only eleven $\gamma$ Dor type pulsators in the eclipsing binaries have been discovered. For six out of 11 systems, the physical parameters were determined. Although a small sample, we find empirical relations that $P_{puls}$ $\propto$ $P_{orb}^{0.43}$ and $P_{puls}$ $\propto$ $g^{-0.83}$. While the pulsation periods increase with longer orbital periods, they decrease with increasing surface gravities of pulsating components and gravitational pull exerted by the companions. We present, briefly, the underlying physics behind

40 pages, 10 figures, accepted by New Astronomy

References in corpus (8)

• KIC 4544587: an Eccentric, Short Period Binary System with delta Sct Pulsations and Tidally Excited Modes
• Deep MMT Transit Survey of the Open Cluster M37 II: Variable Stars
• Survey for δ Sct components in eclipsing binaries and new correlations between pulsation frequency and fundamental stellar characteristics
• KIC 11285625: a double-lined spectroscopic binary with a gamma Dor pulsator discovered from Kepler space photometry
• Nonradial p-modes in the G9.5 giant epsilon Oph? Pulsation model fits to MOST photometry
• The Eclipsing System V404 Lyr: Light-Travel Times and Gamma Doradus Pulsations
• Simulations for Multi-Object Spectrograph Planet Surveys
• The CoRoT star ID100866999: a hybrid gamma Doradus - delta Scuti star in an eclipsing binary system

Cited by in corpus (5)

• Catalogue and Properties of δ Scuti Stars in Binaries
• Absolute Properties of the Pulsating Post-mass Transfer Eclipsing Binary OO Draconis
• $\gamma$ Doradus Pulsations in the Eclipsing Binary Star KIC 6048106
• KIC 7385478: An eclipsing binary with a γ Doradus component
• STEREO Observations of Hybrid Stars V775 Tau and V483 Tau