Open Accesstiravel – Template‐Independent RAdial VELocity measurement
Author(s) -
Zucker S.,
Mazeh T.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10789.x
Subject(s) - physics , radial velocity , measure (data warehouse) , spectral line , doppler effect , set (abstract data type) , simple (philosophy) , astrophysics , orbital elements , computational physics , optics , stars , astronomy , computer science , data mining , philosophy , epistemology , programming language
We propose a new approach to measure differential radial velocities, mainly for single‐lined spectroscopic binaries. The proposed procedure – tiravel (Template‐Independent RAdial VELocities) – does not rely on a prior theoretical or observed template, but instead looks for a set of relative Doppler shifts that simultaneously optimizes the alignment of all the observed spectra. We suggest a simple measure to quantify this overall alignment and use its maximum to measure the relative radial velocities. As a demonstration, we apply tiravel to the observed spectra of three known spectroscopic binaries, and show that in two cases tiravel performs as good as the commonly used approach, while in one case tiravel yielded a better orbital solution.