Determining distances to stars statistically from photometry

New distances to RAVE stars

Probability density functions (pdfs) are determined from new stellar parameters for the distance moduli of stars for which the RAdial Velocity Experiment (RAVE) has obtained spectra with S/N ≥ 10. Single-Gaussian fits to the pdf in distance modulus suffice for roughly half the stars, with most of the other half having satisfactory two-Gaussian representations. As expected, early-type stars rare...

Four-color and Hp Photometry of Stars

UBVJHK synthetic photometry of Galactic O stars

Aims. The development of powerful infrared observational technics enables the study of very extincted objects and young embedded star forming regions. This is especially interesting in the context of massive stars which form and spend a non negligible fraction of their life still enshrouded in their parental molecular cloud. Spectrophotometric calibrations are thus necessary to constrain the ph...

Long-term photometry of Be stars

Strömgren differential uvby photometry of λEri and HR2142 is analyzed. The data were taken during the time interval 1983–1994 in the framework of the Long-Term Photometry of Variables project at La Silla. λ Eri exhibited four photometric events (probably associatedwith line emission episodes) that last several months and which were characterized by a common pattern of change in all passbands (∼...

Cepheid distances from the SpectroPhoto-Interferometry of Pulsating Stars \(SPIPS\)

Context. The parallax of pulsation, and its implementations such as the Baade-Wesselink method and the infrared surface brightness technique, is an elegant method to determine distances of pulsating stars in a quasi-geometrical way. However, these classical implementations in general only use a subset of the available observational data. Aims. Freedman & Madore (2010, ApJ, 719, 335) suggested a...