FOUQUÉ , P.

Long baseline interferometry is now able to resolve the pulsational changes of the angular diameters of a significant number of Cepheids in the solar neighborhood. This allows us to apply a new version of the Baade-Wesselink method to measure their distances, for which we do not need to estimate the star?s temperature. Using this method and...

The recent VINCI/VLTI observations presented in Paper I have nearly doubled the total number of available angular diameter measurements of Cepheids. Taking advantage of the significantly larger color range covered by these observations, we derive in the present paper high precision calibrations of the surface brightness-color relations using...

Context. One challenge for measuring the Hubble constant using classical Cepheids is the calibration of the Leavitt law or period-luminosity relationship. The Baade-Wesselink method for distance determination to Cepheids relies on the ratio of the measured radial velocity and pulsation velocity, the so-called projection factor and the ability...

Context: The cross correlation method (hereafter CC) is widely used to derive the radial velocity curve of Cepheids when the signal to noise ratio of the spectra is low. However, if it is used with an inaccurate projection factor, it might introduce some biases in the Baade-Wesselink (BW) methods of determining the distance of Cepheids. In...

International audience

Astronomy and Astrophysics, 430, pp. 751-759 (2005)

Proc. Conf. SF2A, n/a, (2003)

International audience

n/a, Proc. Conf. SF2A n/a, (2003)

Astron. & Astrophys., 401, p. 959 (2003)

We present the discovery of a previously unknown member of the immediate solar neighbourhood, DENIS-P J104814.7-395606.1 (hereafter DENIS 1048-39), identified while mining the DENIS database for new nearby stars. A HIRES echelle spectrum obtained with the 10-m Keck telescope shows that it is an M9 dwarf. DENIS 1048-39 has a very bright apparent...

International audience

Astron. & Astrophys., 403, pp. 975-992 (2003). http://dx.doi.org/10.1051/0004-6361:20030437