Naslov
Modern Techniques for the Analysis of Spectroscopic Binaries

Autori
Hensberge, Herman ; Pavlovski, Kresimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, held 22-25 August, 2006 in Prague, Czech Republic, S240

Mjesto i datum
Prag, Češka Republika, 22.08.2006. - 25.08.2006

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
binary stars; spectroscopy; radial velocity

Sažetak
Spectroscopic binaries are fundamental sources of precise basic stellar parameters. Composite spectra of multiple systems are used to determine orbital parameters, and more recently to reconstruct component spectra. Techniques used to obtain these goals include measurement of positions of single spectral lines, cross-correlation using template spectra or hardware masks, two-dimensional cross-correlation, determination of broadening functions, subtraction of a template for the primary component, Doppler tomography, spectral separation and spectral disentangling. An overview of these techniques will be given pointing out relations between them, basic limitations, strengths and, when appropriate, implications for the observing strategy. The second part of the talk will be devoted to a more detailed discussion of spectral separation and disentangling techniques using either the Fourier components of the composite spectra or their representation in velocity (logarithmic wavelength) space, with the aim to give the potential user insight in equivalence and practical differences between different approaches. An evaluation of the risks due to near-singularity of the involved equations and due to bias in the observations is made in the case of spectral separation of binary stars.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA