Cepheids at high angular resolution: recent results obtained by stellar interferometry

Antoine Mérand

doi:10.1117/12.671000

27 June 2006 Cepheids at high angular resolution: recent results obtained by stellar interferometry

Antoine Mérand

Proceedings Volume 6268, Advances in Stellar Interferometry; 62680H (2006) https://doi.org/10.1117/12.671000
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We present the latest results obtained by stellar interferometry (SI) in the field of pulsating Cephieds stars. The SI technique is particularly well suited to measure distances using the quasi-geometric pulsation parallax method known as the Baade-Wesselink (BW) method. The improvements in angular resolution and precision in the measurements have led to high precision calibration of the Cepheids period luminosity relation. On the other hand, the assumptions of the BW method can be investigated using SI: we present a calibration of the spectroscopic projection factor and the study of center to limb darkening and circumstellar envelopes. These later studies clearly demonstrate that SI has recently entered a regime where the BW implemetation is no longer limited by the precision of the angular diameter measurements but by the classical assumptions underlying the method itself. This calls for a better understanding of Cepheids, using numerical models and diverse observation techniques, including SI.

Citation Download Citation

Antoine Mérand "Cepheids at high angular resolution: recent results obtained by stellar interferometry", Proc. SPIE 6268, Advances in Stellar Interferometry, 62680H (27 June 2006); https://doi.org/10.1117/12.671000

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available