An interferometric view on binarity and circumstellar envelopes of Cepheids. Issue Volume 9:Issue S301(2013) (18th February 2014)

• Record Type: Journal Article
• Authors: Gallenne, A.; Kervella, P.; Mérand, A.; Monnier, J. D.; Breitfleder, J.; Pietrzyński, G.; Gieren, W.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S301(2013)
• Page Start: 411
• Page End: 412
• Publication Date: 2014-02-18
• Subjects: stars: variables: Cepheids, -- stars: circumstellar matter, -- binaries; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313014804
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: Optical interferometry is the only technique giving access to milli-arcsecond (mas) resolution at infrared wavelengths. For Cepheids, this is a powerful and unique tool to detect the orbiting companions and the circumstellar envelopes (CSE). CSEs are interesting because they might be used to trace the Cepheid evolution history, and more particularly they could impact the distance scale. Cepheids belonging to binary systems offer an unique opportunity to make progress in resolving the Cepheid mass discrepancy. The combination of spectroscopic and interferometric measurements will allow us to derive the orbital elements, distances, and dynamical masses. Here we focus on recent results using 2- to 6-telescopes beam combiners for the Cepheids X Sgr, T Mon and V1334 Cyg.